CN209762409U - Automatic drive anti-corrosion single-seat regulating valve - Google Patents
Automatic drive anti-corrosion single-seat regulating valve Download PDFInfo
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- CN209762409U CN209762409U CN201821678294.3U CN201821678294U CN209762409U CN 209762409 U CN209762409 U CN 209762409U CN 201821678294 U CN201821678294 U CN 201821678294U CN 209762409 U CN209762409 U CN 209762409U
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- valve rod
- corrugated pipe
- wall
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Abstract
The utility model discloses an automatic drive anticorrosion single-seat regulating valve, which comprises a corrugated pipe sleeve shell, an upper cover shell, a corrugated pipe sleeve, a corrugated pipe and an upper cover core, wherein a sealing filler component is arranged in the upper cover core, and the sealing filler component is sequentially compressed and fixed by a filler pressure pad and a filler pressure plate; the valve rod is in sealing contact with the sealing filler assembly and the corrugated pipe, and the upper cover core is provided with a mounting hole for accommodating the sealing filler assembly; the sealing packing component comprises polytetrafluoroethylene packing, a buffer spring and an annular pressing plate, the polytetrafluoroethylene packing is sleeved outside the valve rod, and the outer wall and the inner wall of the polytetrafluoroethylene packing are respectively in sealing contact with the inner wall of the upper cover core mounting hole and the outer wall of the valve rod correspondingly; buffer springs are arranged at two axial ends of the polytetrafluoroethylene packing, the buffer springs are sleeved on the valve rod, and annular pressing plates sleeved on the valve rod are arranged at free ends of the buffer springs. The utility model discloses can prevent effectively that filler and valve rod outer wall friction from damaging, guarantee valve rod corrosion resisting property and the whole life of governing valve.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to anticorrosive single seat governing valve of automatic drive.
background
At present, a corrosion-resistant fluorine lining regulating valve mainly adopts a metal lining (or an outer coating) fluoroplastic material (mainly fluorinated ethylene propylene, referred to as F46 or FEP for short) to isolate from a strong corrosive medium, so that the aim of corrosion resistance is fulfilled. For example, in the technique disclosed in patent CN92220634.3, since the valve stem is wrapped with a layer of ptfe tube, the valve stem is easily damaged by the friction between the upper and lower reciprocating motions and the packing, so that the valve stem is corroded to cause valve failure.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in some current single seat governing valve structures, when adopting the packing to seal, pack and valve rod outer wall friction fragile, influence valve rod corrosion resisting property and the whole life of governing valve, the utility model provides an automatic drive anticorrosive single seat governing valve of solving above-mentioned problem.
The utility model discloses a following technical scheme realizes:
The automatic-drive anti-corrosion single-seat regulating valve comprises a corrugated pipe sleeve shell and an upper cover shell which are connected through bolts, wherein a corrugated pipe sleeve and a corrugated pipe are sequentially sleeved in the corrugated pipe sleeve shell from outside to inside; an upper cover core is sleeved in the upper cover shell, a sealing filler assembly is arranged in the upper cover core, and the sealing filler assembly is pressed and fixed through a filler pressing pad and a filler pressing plate in sequence; the valve rod penetrates through the corrugated pipe sleeve shell and the upper cover shell in sequence, the valve rod is in sealing contact with the sealing filler assembly and the corrugated pipe, and the upper cover core is provided with a mounting hole for accommodating the sealing filler assembly; the sealing packing assembly comprises polytetrafluoroethylene packing, a buffer spring and an annular pressing plate, the polytetrafluoroethylene packing is sleeved outside the valve rod, and the outer wall and the inner wall of the polytetrafluoroethylene packing are respectively in sealing contact with the inner wall of the upper cover core mounting hole and the outer wall of the valve rod correspondingly; buffer springs are arranged at two axial ends of the polytetrafluoroethylene packing, the buffer springs are sleeved on the valve rod, and annular pressing plates sleeved on the valve rod are arranged at free ends of the buffer springs.
The utility model has double-layer sealing through the corrugated pipe and the packing component, and the sealing effect is good; the principle of sealing by adopting the packing assembly is that the polytetrafluoroethylene packing is sleeved on the outer wall of the valve rod, and the outer wall and the inner wall of the polytetrafluoroethylene packing are respectively in sealing contact with the inner wall of the upper cover core mounting hole and the outer wall of the valve rod correspondingly to play a role in sealing; meanwhile, the axial length of the mounting hole is greater than that of the polytetrafluoroethylene packing, buffer springs are arranged at two axial ends of the polytetrafluoroethylene packing, and free ends of the two buffer springs are in contact with the bottom of the corresponding mounting hole and the end face of the upper cover core through annular pressing plates so as to increase the contact area; like this when valve rod and polytetrafluoroethylene pack take place relative frictional resistance, frictional resistance decomposes into axial promotion effort and radial pressure to polytetrafluoroethylene pack, under partial axial promotion effort, polytetrafluoroethylene pack can take place very little axial displacement effect along with the valve rod, and this partial displacement effect is through the buffer spring who converts to both ends, and self through the spring resumes the effort and balances, can prevent effectively that frictional resistance too big from causing the packing to damage, influence valve rod life.
Preferably, the outer side wall of the annular pressure plate is in clearance fit with the inner wall of the mounting hole of the upper cover core, and the inner side wall of the annular pressure plate is in clearance fit with the outer wall of the valve rod.
Namely, the inner diameter of the annular pressure plate is larger than the outer diameter of the valve rod, the outer diameter of the annular pressure plate is smaller than the inner diameter of the mounting hole, and the inner side and the outer side of the annular pressure plate are in clearance fit to form smaller friction resistance; and meanwhile, the sealing effect of the annular pressing plate polytetrafluoroethylene packing is avoided.
preferably, electromagnetic chucks which are mutually matched and fixedly adsorbed are arranged on the lower plate surface of the annular pressing plate at the axial bottom end of the polytetrafluoroethylene filler and the bottom end surface of the mounting hole of the upper cover core.
The annular pressing plate at the axial bottom end of the polytetrafluoroethylene filler is connected with the bottom end face of the mounting hole through the electromagnetic chuck, so that the annular pressing plate is favorably fixed, and the buffering and dispersing friction resistance effects of the buffer spring are exerted to the maximum extent; meanwhile, the disassembly and assembly operation is facilitated.
Preferably, axial one end of the packing pressure pad extends into the mounting hole of the upper cover core and then contacts with the annular pressure plate, and a clamping groove for accommodating the annular pressure plate is further formed in the end face, facing the annular pressure plate, of the packing pressure pad.
The annular pressing plate at the axial top end of the polytetrafluoroethylene filler is embedded into the clamping groove in the filler pressing pad, so that the annular pressing plate drives the buffer spring to deform radially to influence the service life of the spring in the use process.
Preferably, the ultimate stretching length of the two buffer springs at the two axial ends of the polytetrafluoroethylene packing is less than the axial length of the packing pressure pad extending into the mounting hole.
Preferably, the side wall of the axial top end of the corrugated pipe protrudes outwards to form an annular limiting plate, and the annular limiting plate is tightly pressed between the end part of the corrugated pipe sleeve and the end part of the cover core; and a plurality of locating pieces are convexly arranged on the upper plate surface and the lower plate surface of the annular limiting plate, and locating grooves matched with the locating pieces are arranged on the end surfaces, facing the annular limiting plate, of the corrugated pipe sleeve and the cover core.
The upper plate surface and the lower plate surface of the annular limiting plate can be provided with a plurality of positioning blocks, the positioning blocks on the upper plate surface or the lower plate surface can be radially distributed on the radial section of the corrugated pipe by taking the corrugated pipe as the center of a circle, and the corrugated pipe is mainly prevented from being distorted.
The utility model discloses have following advantage and beneficial effect:
The utility model has double-layer sealing through the corrugated pipe and the packing component, and the sealing effect is good; the principle of sealing by adopting the packing assembly is that the polytetrafluoroethylene packing is sleeved on the outer wall of the valve rod, and the outer wall and the inner wall of the polytetrafluoroethylene packing are respectively in sealing contact with the inner wall of the upper cover core mounting hole and the outer wall of the valve rod correspondingly to play a role in sealing; meanwhile, the axial length of the mounting hole is greater than that of the polytetrafluoroethylene packing, buffer springs are arranged at two axial ends of the polytetrafluoroethylene packing, and free ends of the two buffer springs are in contact with the bottom of the corresponding mounting hole and the end face of the upper cover core through annular pressing plates so as to increase the contact area; like this when valve rod and polytetrafluoroethylene pack take place relative frictional resistance, frictional resistance decomposes into axial promotion effort and radial pressure to polytetrafluoroethylene pack, under partial axial promotion effort, polytetrafluoroethylene pack can take place very little axial displacement effect along with the valve rod, and this partial displacement effect is through the buffer spring who converts to both ends, and self through the spring resumes the effort and balances, can prevent effectively that frictional resistance too big from causing the packing to damage, influence valve rod life.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is an overall front view of the present invention;
FIG. 2 is a schematic axial cross-sectional structural view of the packing seal assembly of the present invention;
Fig. 3 is a schematic view of the 7-bellows overhead structure of the present invention.
Reference numbers and corresponding part names in the drawings: the sealing structure comprises a flange 1, a connecting pipe core 2, a connecting pipe shell 3, a valve body core 4, a valve seat 5, a shell 6, a corrugated pipe 7, an annular limiting plate 71, a positioning block 72, a corrugated pipe sleeve 8, a corrugated pipe sleeve shell 9, a valve rod 10, an upper cover core 11, an upper cover shell 12, a sealing filler component 13, polytetrafluoroethylene filler 131, a buffer spring 132, an annular pressing plate 133, an electromagnetic chuck 134, a clamping groove 135, a filler pressing pad 14 and a filler pressing plate 15.
Detailed Description
to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The embodiment provides an automatic-driving anti-corrosion single-seat regulating valve which comprises a corrugated pipe sleeve shell 9 and an upper cover shell 12 which are connected through bolts, wherein a corrugated pipe sleeve 8 and a corrugated pipe 7 are sequentially sleeved in the corrugated pipe sleeve shell 9 from outside to inside; an upper cover core 11 is sleeved in the upper cover shell 12, a sealing filler assembly 13 is arranged in the upper cover core 11, and the sealing filler assembly 13 is pressed and fixed through a filler pressure pad 14 and a filler pressure plate 15 in sequence; the valve rod 10 penetrates through the corrugated pipe sleeve shell 9 and the upper cover shell 12 in sequence, the valve rod 10 is in sealing contact with the sealing packing component 13 and the corrugated pipe 7, and the upper cover core 11 is provided with a mounting hole for accommodating the sealing packing component 13. The sealing packing component 13 comprises a polytetrafluoroethylene packing 131, a buffer spring 132 and an annular pressing plate 133, the polytetrafluoroethylene packing 131 is sleeved outside the valve rod 10, and the outer wall and the inner wall of the polytetrafluoroethylene packing 131 are respectively in sealing contact with the inner wall of the mounting hole of the upper cover core 11 and the outer wall of the valve rod 10 correspondingly; the two axial ends of the teflon packing 131 are both provided with a buffer spring 132, the buffer spring 132 is sleeved on the valve rod 10, and the free end of the buffer spring 132 is provided with an annular pressure plate 133 sleeved on the valve rod 10.
Example 2
in the further improvement of embodiment 1, the outer side wall of the annular pressure plate 133 is in clearance fit with the inner wall of the mounting hole of the upper cover core 11, and the inner side wall of the annular pressure plate 133 is in clearance fit with the outer wall of the valve rod 10. Electromagnetic chucks 134 which are mutually matched and fixedly adsorbed are arranged on the lower plate surface of the annular pressing plate 133 at the axial bottom end of the polytetrafluoroethylene filler 131 and on the bottom end surface of the mounting hole of the upper cover core 11. One axial end of the packing pressure pad 14 extends into the mounting hole of the upper cover core 11 and then contacts with the annular pressure plate 133, and a clamping groove 135 for accommodating the annular pressure plate 133 is further formed on the end surface of the packing pressure pad 14 facing the annular pressure plate 133. The ultimate extension length of the two buffer springs 132 at the two axial ends of the polytetrafluoroethylene packing 131 is then smaller than the axial length of the packing pressure pad 14 extending into the mounting hole.
Example 3
Based on the further improvement of the embodiment 2, the axial top end side wall of the corrugated pipe 7 is provided with an annular limit plate 71 in a protruding mode, and the annular limit plate 71 is tightly pressed between the end part of the corrugated pipe sleeve 8 and the end part of the cover core 11; and a plurality of positioning blocks 72 are uniformly and convexly arranged on the upper plate surface and the lower plate surface of the annular limiting plate 71, and positioning grooves matched with the positioning blocks 72 are respectively arranged on the end surfaces, facing the annular limiting plate 71, of the bellows sleeve 8 and the cover core 11.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. the automatic-driving anti-corrosion single-seat regulating valve comprises a corrugated pipe sleeve shell (9) and an upper cover shell (12) which are connected through bolts, wherein a corrugated pipe sleeve (8) and a corrugated pipe (7) are sequentially sleeved in the corrugated pipe sleeve shell (9) from outside to inside; an upper cover core (11) is sleeved in the upper cover shell (12), a sealing packing assembly (13) is arranged in the upper cover core (11), and the sealing packing assembly (13) is pressed and fixed through a packing pressure pad (14) and a packing pressure plate (15) in sequence; the valve rod (10) sequentially penetrates through the corrugated pipe sleeve shell (9) and the upper cover shell (12), and the valve rod (10) is in sealing contact with the sealing packing component (13) and the corrugated pipe (7), and is characterized in that the upper cover core (11) is provided with a mounting hole for accommodating the sealing packing component (13); the sealing packing component (13) comprises polytetrafluoroethylene packing (131), a buffer spring (132) and an annular pressing plate (133), the polytetrafluoroethylene packing (131) is sleeved outside the valve rod (10), and the outer wall and the inner wall of the polytetrafluoroethylene packing (131) are respectively in sealing contact with the inner wall of the mounting hole of the upper cover core (11) and the outer wall of the valve rod (10) correspondingly; buffer springs (132) are arranged at two axial ends of the polytetrafluoroethylene packing (131), the buffer springs (132) are sleeved on the valve rod (10), and annular pressing plates (133) sleeved on the valve rod (10) are arranged at free ends of the buffer springs (132);
The outer side wall of the annular pressure plate (133) is in clearance fit with the inner wall of the mounting hole of the upper cover core (11), and the inner side wall of the annular pressure plate (133) is in clearance fit with the outer wall of the valve rod (10); electromagnetic suckers (134) which are mutually matched, adsorbed and fixed are arranged on the lower plate surface of the annular pressing plate (133) at the axial bottom end of the polytetrafluoroethylene filler (131) and on the bottom end surface of the mounting hole of the upper cover core (11); one axial end of the packing pressure pad (14) extends into the mounting hole of the upper cover core (11) and then contacts with the annular pressure plate (133), and a clamping groove (135) used for accommodating the annular pressure plate (133) is further formed in the end face, facing the annular pressure plate (133), of the packing pressure pad (14).
2. The self-actuating corrosion-resistant single seat regulating valve according to claim 1, wherein the ultimate tensile length of the two buffer springs (132) at the two axial ends of the polytetrafluoroethylene packing (131) is less than the axial length of the packing pressure pad (14) extending into the mounting hole.
3. The self-driven anti-corrosion single-seat regulating valve according to claim 1, wherein an annular limiting plate (71) protrudes outwards from the axial top side wall of the corrugated pipe (7), and the annular limiting plate (71) is compressed between the end of the corrugated pipe sleeve (8) and the end of the cover core (11); and the upper plate surface and the lower plate surface of the annular limiting plate (71) are both convexly provided with a plurality of positioning blocks (72), and the end surfaces, facing the annular limiting plate (71), of the corrugated pipe sleeve (8) and the cover core (11) are both provided with positioning grooves matched with the positioning blocks (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821678294.3U CN209762409U (en) | 2018-10-16 | 2018-10-16 | Automatic drive anti-corrosion single-seat regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821678294.3U CN209762409U (en) | 2018-10-16 | 2018-10-16 | Automatic drive anti-corrosion single-seat regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209762409U true CN209762409U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821678294.3U Active CN209762409U (en) | 2018-10-16 | 2018-10-16 | Automatic drive anti-corrosion single-seat regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209762409U (en) |
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2018
- 2018-10-16 CN CN201821678294.3U patent/CN209762409U/en active Active
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