CN209943554U - Connecting device of valve core and valve rod - Google Patents
Connecting device of valve core and valve rod Download PDFInfo
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- CN209943554U CN209943554U CN201920327130.4U CN201920327130U CN209943554U CN 209943554 U CN209943554 U CN 209943554U CN 201920327130 U CN201920327130 U CN 201920327130U CN 209943554 U CN209943554 U CN 209943554U
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- valve rod
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Abstract
The utility model relates to a connecting device of a valve core and a valve rod, which comprises a valve rod, a transition sleeve, a valve core and a connecting key; be equipped with the external screw thread on the outer wall of valve rod, be equipped with the internal thread on the inner wall of transition cover, the valve rod closes messenger both inseparable combinations through interior external screw thread soon with the transition cover, the valve rod keyway has been seted up at the lower terminal surface of valve rod, the case keyway has been seted up at the up end of case, be equipped with the connection key in valve rod keyway and case keyway, the valve rod passes through the parallel key with the case and links to each other, the valve rod restricts the motion of case radial direction through the connection key, the shaping of necking down shape that is connected with in the lower tip of transition cover is bordured and is overlapped, the shaping is bordured the cover and is restricted the axial. The utility model avoids the increase of processing risk and processing cost caused by the need of processing valve core thread due to the direct screwing of the valve core; the utility model discloses the overall design size of well case can reduce greatly for the manufacturing cost of case can obtain greatly reduced.
Description
Technical Field
The utility model relates to a device on the valve, specifically speaking are connecting device of case and valve rod.
Background
The traditional hard alloy valve core is mainly applied to a black water valve, and the black water valve is a valve developed and manufactured specially for severe working conditions in the coal chemical industry, can resist high-strength scouring and corrosion and is suitable for a high pressure difference system. The black water valve is mainly used for gasification and slag water treatment processes in coal chemical industry processes, realizes control of liquid levels of a gasification furnace and a carbon washing tower, and performs multi-stage flash evaporation on discharged black water so as to recover grey water and heat. The structure of the valve is particularly important under such harsh conditions, and in order to ensure the realization of normal regulation and control of the control loop and the safe and stable long-term operation of the device, higher requirements on the stability and reliability of the valve core structure must be provided.
At present, the traditional hard alloy valve core component applied to the high-strength scouring working condition mostly adopts the mode of mechanically fastening and connecting a valve rod and a valve clack by direct threads, and the valve clack is made of integrally sintered hard alloy. Because the valve clack is high in hardness and large in brittleness under the working condition of high-speed impact or vibration of a medium, the valve clack is easy to shatter under the working condition of cyclic vibration, and sometimes, the damage to the valve clack caused by resonance in use is larger; meanwhile, the valve clack is made of hard alloy, so that the hardness is high, and the thread machining mode is special, so that the thread machining cost is high; meanwhile, the precision of the conventional hard alloy thread processing mode is not high, so that the clearance between the valve rod and the valve clack is large after the valve rod and the valve clack are assembled, and the phenomenon of brittle fracture is easy to occur under the working condition of high pressure difference. It can be concluded from this that the conventional direct threaded mechanical fastening of the valve stem and the valve flap is not reliable for applications that meet this type of operating condition.
Disclosure of Invention
The utility model aims at overcoming the not enough of existence among the prior art, provide a case and the connecting device of valve stem that can reduce case machining dimension, greatly reduced case processing cost greatly.
According to the technical scheme provided by the utility model, the connecting device of the valve core and the valve rod comprises a valve rod, a transition sleeve, a valve core and a connecting key; be equipped with the external screw thread on the outer wall of valve rod, be equipped with the internal thread on the inner wall of transition cover, the valve rod closes messenger both inseparable combinations through interior external screw thread soon with the transition cover, the valve rod keyway has been seted up at the lower terminal surface of valve rod, the case keyway has been seted up at the up end of case, be equipped with the connection key in valve rod keyway and case keyway, the valve rod passes through the connection key with the case and links to each other, the valve rod restricts the motion of case radial direction through the connection key, the shaping of necking down shape that is connected with in the lower tip of transition cover is bordured and is overlapped, the shaping is bordured the cover and is restricted the axial.
The valve rod is provided with a valve rod pin hole, the transition sleeve is provided with a transition sleeve pin hole, and an anti-loosening pin is inserted in the transition sleeve pin hole and the valve rod pin hole.
And a distance is reserved between the lower end part of the forming edge covering sleeve and the sealing surface of the valve core.
The forming edge covering sleeve is provided with an inner conical surface with a downward small end, the valve core is provided with an outer conical surface with a downward small end, and the inner conical surface is attached to the outer conical surface to enable the forming edge covering sleeve to limit the axial movement of the valve core.
The utility model has the advantages that:
1. the valve core and the valve rod are connected in a wrapping thread screwing mode of the transition sleeve, so that the processing risk and the processing cost increase caused by the fact that the valve core threads need to be processed due to direct screwing of the valve core are avoided; meanwhile, the problem that the normal use of the valve is further threatened due to the fact that the assembly clearance is too large due to low machining precision of the valve core threads is avoided.
2. Because a distance is reserved between the sealing surface of the valve core and the forming edge covering sleeve, the tiny sealing surface of the valve core is damaged, the sealing surface can be machined by using the waste, the use requirement of the valve can be met, and the maintenance utilization rate is high.
3. Due to the adoption of the transition sleeve, the overall design size of the valve core can be greatly reduced, so that the production cost of the valve core can be greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
The connecting device of the valve core and the valve rod comprises a valve rod 1, a transition sleeve 2, a valve core 3 and a connecting key 4; be equipped with the external screw thread on the outer wall of valve rod 1, be equipped with the internal thread on the inner wall of transition cover 2, valve rod 1 closes messenger both inseparable combinations through interior external screw thread soon with transition cover 2, the valve rod keyway has been seted up at the lower terminal surface of valve rod 1, the case keyway has been seted up at the up end of case 3, be equipped with connecting key 4 in valve rod keyway and case keyway, valve rod 1 links to each other through connecting key 4 with case 3, valve rod 1 restricts the motion of 3 radial directions of case through connecting key 4, the shaping of the lower tip body coupling of cover 2 that contracts mouthful shape is bordured and is overlapped 21, the shaping is bordured and is overlapped 21 and is restricted the axial motion of case 3, the sealed face 31 of case has on the case.
A valve rod pin hole is formed in the valve rod 1, a transition sleeve pin hole is formed in the transition sleeve 2, and an anti-loosening pin 5 is inserted into the transition sleeve pin hole and the valve rod pin hole. This prevents loosening between the external thread on the valve stem 1 and the internal thread on the transition sleeve 2.
A distance is reserved between the lower end part of the molding edge covering sleeve 21 and the valve core sealing surface 31. This facilitates repair of damage to the valve element sealing surface 31 after erosion cavitation.
The forming edge covering sleeve 21 is provided with an inner conical surface 22 with a downward small end, the valve core 3 is provided with an outer conical surface 32 with a downward small end, and the inner conical surface 22 is attached to the outer conical surface 32 to enable the forming edge covering sleeve 21 to limit the axial movement of the valve core 3.
During the installation, earlier with valve rod 1 horizontal fixation, then case 2 links up with valve rod 1, makes case 2 and valve rod 1 relatively fixed through connector key 4. Through rotatory transition cover 2, slowly revolve the closure with valve rod 1 and transition cover 2 through internal and external screw thread, meanwhile, the shaping is bordured cover 21 and is fixed valve core 3 gradually including the external screw thread spiral closure in-process. When the external thread of the valve rod 1 is screwed to the end, the valve core 3 is tightly attached to the valve rod 1. The cylindrical pin 5 is added at the joint of the valve rod 1 and the valve core 3, so as to prevent the loosening phenomenon of the screw thread.
In order to facilitate the transition sleeve 2 and the valve rod 1, the outer wall of the transition sleeve 2 can be designed into a regular hexagon shape, and a certain section of the valve rod 1 above the transition sleeve 2 is designed into a shape with a pair of parallel surfaces.
Claims (4)
1. A connecting device of a valve core and a valve rod comprises a valve rod (1), a transition sleeve (2), a valve core (3) and a connecting key (4); the method is characterized in that: be equipped with the external screw thread on the outer wall of valve rod (1), be equipped with the internal thread on the inner wall of transition cover (2), valve rod (1) and transition cover (2) close soon through interior external screw thread and make both combine closely, the valve rod keyway has been seted up at the lower terminal surface of valve rod (1), the case keyway has been seted up at the up end of case (3), be equipped with connecting key (4) in valve rod keyway and case keyway, valve rod (1) link to each other through connecting key (4) with case (3), valve rod (1) restrict the motion of case (3) radial direction through connecting key (4), the shaping of the lower tip body coupling of transition cover (2) necking down shape is bordured cover (21), the shaping is bordured cover (21) and is restricted the axial motion of case (3), case sealed face (31) have on case (3) of shaping borduringcover (21) below.
2. The valve element to valve stem coupling apparatus of claim 1, wherein: a valve rod pin hole is formed in the valve rod (1), a transition sleeve pin hole is formed in the transition sleeve (2), and an anti-loosening pin (5) is inserted into the transition sleeve pin hole and the valve rod pin hole.
3. The valve element to valve stem coupling apparatus of claim 1, wherein: and a distance is reserved between the lower end part of the molding edge covering sleeve (21) and the valve core sealing surface (31).
4. The valve element to valve stem coupling apparatus of claim 1, wherein: the forming edge covering sleeve (21) is provided with an inner conical surface (22) with a downward small end, the valve core (3) is provided with an outer conical surface (32) with a downward small end, and the inner conical surface (22) is attached to the outer conical surface (32) so that the forming edge covering sleeve (21) limits the axial movement of the valve core (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920327130.4U CN209943554U (en) | 2019-03-14 | 2019-03-14 | Connecting device of valve core and valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920327130.4U CN209943554U (en) | 2019-03-14 | 2019-03-14 | Connecting device of valve core and valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209943554U true CN209943554U (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920327130.4U Active CN209943554U (en) | 2019-03-14 | 2019-03-14 | Connecting device of valve core and valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209943554U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826968A (en) * | 2019-03-14 | 2019-05-31 | 无锡智能自控工程股份有限公司 | The attachment device of spool and valve rod |
-
2019
- 2019-03-14 CN CN201920327130.4U patent/CN209943554U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826968A (en) * | 2019-03-14 | 2019-05-31 | 无锡智能自控工程股份有限公司 | The attachment device of spool and valve rod |
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