CN210068961U - Novel three-eccentric metal U-shaped ring sealing butterfly valve - Google Patents

Abstract

The utility model discloses a novel three eccentric metal U-shaped ring seal butterfly valves, which comprises a valve body, be provided with the dish board in the valve body, it reaches lower valve rod to rotate the last valve rod that is connected with the center and aligns on the valve body, the eccentric installation of dish board is fixed in last valve rod and lower valve rod department, be provided with the conical surface on the outer profile face of dish board lateral part, the conical surface divide into the conical surface of left end and the conical surface of right-hand member, the tapering of the conical surface of left end and right-hand member is inequality, it has the mounting groove to open on the valve body, install the metal U-shaped sealing ring that the cross-section is the U-shaped in the mounting groove, the lateral. The utility model discloses structural design is ingenious, reasonable, can be applicable to the pipe seal under the different difference in temperature, and sealed effect is better, can prevent effectively that under the environment that the difference in temperature is big, the condition emergence of the sealed region of dish board emergence leakage is worth popularizing and applying.

Description

Novel three-eccentric metal U-shaped ring sealing butterfly valve

Technical Field

The utility model relates to a valve, especially a novel three eccentric metal U-shaped ring seal butterfly valves.

Background

The butterfly valve drives the dish board simultaneously according to rotatory valve rod and rotates the valve of doing and open and close, and traditional butterfly valve all is that sealing washer and dish board are all fixed forms, under different temperatures, the condition of expend with heat and contract with cold can take place for dish board and sealing washer, because expend with heat and contract with cold can cause the condition of medium leakage, so traditional butterfly valve can only be applicable to the difference in temperature not under very big operating mode, under the extremely big operating mode of difference in temperature, cause the medium to leak easily, has caused not little problem to production and safety.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve above-mentioned prior art's shortcoming, provide a can be applicable to the novel three eccentric metal U-shaped ring seal butterfly valve under the very big operating mode of difference in temperature, satisfied under the very big operating mode of difference in temperature, can not take place the safety demand that the medium leaked all.

The utility model provides a technical scheme that its technical problem adopted: the utility model provides a novel three eccentric metal U-shaped ring seal butterfly valves, which comprises a valve body, be provided with the dish board in the valve body, it has the last valve rod and the lower valve rod that the center aligns to rotate to be connected with on the valve body, the eccentric installation of dish board is fixed in last valve rod and lower valve rod department, be provided with the conical surface of taking sealed face build-up welding STL alloy on the outer profile face of dish board lateral part, the conical surface divide into the conical surface of left end and the conical surface of right-hand member, the tapering of the conical surface of left end and the conical surface of right-hand member is inequality, it has the mounting groove to open on the valve body, install the cross-section in the mounting groove for U-shaped form and with conical surface complex metal U-shaped sealing ring, the diameter width of. The disc plate adopts the eccentric shape and the conical surface shape is adopted on the outer contour surface of the side part of the disc plate, when the disc plate is closed, the metal U-shaped sealing ring can be unfolded, so that the metal U-shaped sealing ring can be tensioned at the conical surface, and the sealing performance is ensured; the conical surface adopts a left end conical surface and a right end conical surface with different tapers, and the taper of the right end conical surface is smaller than that of the left end conical surface, so that the disc plate can be conveniently opened and separated from the metal U-shaped sealing ring; the offset between the disc plate and the valve body is 1.5 mm-3 mm; the degree of the left end conical surface is 12-18 degrees; the degree of the right conical surface is 3-7 degrees; the diameter width of the metal U-shaped sealing ring is smaller than that of the mounting groove, so that a spread space is reserved for the metal U-shaped sealing ring; the STL alloy is an existing alloy material on the market, is also called as stellite alloy, has high dimensional stability, very high wear resistance, corrosion resistance, oxidation resistance and vulcanization capacity, has high wear resistance due to high hot hardness below 870 ℃, and is widely used for sealing rings, wear-resistant liners, metal casting molds, hot extrusion molds, steam and chemical valve seats, rollers, hot furnace parts, burner nozzles and the like.

Further perfect, be provided with first screw thread on the interior profile face of mounting groove, press the cover including pressing body and spacing body, be provided with on the outer profile face of pressing body with first screw-thread fit's second screw thread, open on the spacing body have with second screw-thread fit's screw thread through-hole. The pressing sleeve adopts a split form, so that the installation and the replacement of the metal U-shaped sealing ring are facilitated, the metal U-shaped sealing ring with different cross sections can be suitable, if the cross section of the metal U-shaped sealing ring is large, the spacing between the inner wall of the pressing body and the side part of the mounting groove can be enlarged only by moving the limiting body inwards, and the metal U-shaped sealing ring with the large cross section is suitable for the metal U-shaped sealing ring with the large cross section.

Further perfect, it has the jack that is used for grafting lower valve rod to open on the valve body, and the below of jack is equipped with the sealing plug of welded fastening on the valve body, and it has round groove to open on the top surface of sealing plug, installs thrust ball bearing in the round groove, and thrust ball bearing's upper ring can rotate and lower valve rod is put and is located thrust ball bearing's upper ring. The sealing plug, the circular groove and the thrust ball bearing are used for reducing resistance received by the disc plate when the disc plate rotates, so that the disc plate can be opened more easily, and the situation that the disc plate is not developed and rusted to block for a long time is avoided.

The utility model discloses profitable effect is: the utility model has the advantages of ingenious structural design, it is reasonable, utilize the dish board to adopt the form of the conical surface on eccentric and dish board lateral part outer profile face, when closing the dish board, can strut sealedly to metal U-shaped sealing ring, thereby make metal U-shaped sealing ring can be located at the conical surface by the tensioning, and then ensure the leakproofness, thereby also can ensure that the medium does not reveal under the environment that the difference in temperature is great, utilize the conical surface to adopt the conical different left end conical surface and right-hand member conical surface tapering to be less than the conical form of left end conical surface, the dish board of being convenient for is opened from metal U-shaped sealing ring and is deviate from, be worth.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the area A of FIG. 1;

FIG. 3 is a partial enlarged view of the area B of FIG. 1;

FIG. 4 is a front view of the dish plate of the present invention;

FIG. 5 is a top view of the dish plate of the present invention;

fig. 6 is a schematic structural view of the middle dish plate of the present invention.

Description of reference numerals: the valve comprises a valve body 1, a mounting groove 1-1, a first thread 1-1a, a disc plate 2, a conical surface 2-1, a left-end conical surface 2-1a, a right-end conical surface 2-1b, an upper valve rod 3, a lower valve rod 4, a metal U-shaped sealing ring 5, a pressing sleeve 6, a pressing body 6-1, a second thread 6-1a, a limiting body 6-2, a thread through hole 6-2a, a sealing plug 7, a circular groove 7-1, a thrust ball bearing 8 and an upper ring 8-1.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

with reference to the accompanying drawings: the novel three-eccentric metal U-shaped ring sealing butterfly valve comprises a valve body 1, wherein a disc plate 2 is arranged in the valve body 1, an upper valve rod 3 and a lower valve rod 4 with centers aligned are rotatably connected to the valve body 1, the disc plate 2 is eccentrically and fixedly arranged at the upper valve rod 3 and the lower valve rod 4, a conical surface 2-1 with a seal surface STL alloy is arranged on the outer contour surface of the side portion of the disc plate 2, the conical surface 2-1 is divided into a left conical surface 2-1a and a right conical surface 2-1b, the conical degrees of the left conical surface 2-1a and the right conical surface 2-1b are different, a mounting groove 1-1 is formed in the valve body 1, a metal U-shaped sealing ring 5 with a U-shaped cross section and matched with the conical surface 2-1 is arranged in the mounting groove 1-1, the diameter width of the metal U-shaped sealing ring 5 is smaller than that of the mounting groove 1-1, and the side portion of the 5 a pressing sleeve 6 moving outwards.

The inner contour surface of the mounting groove 1-1 is provided with a first thread 1-1a, the pressing sleeve 6 comprises a pressing body 6-1 and a limiting body 6-2, the outer contour surface of the pressing body 6-1 is provided with a second thread 6-1a matched with the first thread 1-1a, and the limiting body 6-2 is provided with a thread through hole 6-2a matched with the second thread 6-1 a.

The valve body 1 is provided with an insertion hole 1-2 for inserting the lower valve rod 4, a sealing plug 7 welded and fixed on the valve body 1 is arranged below the insertion hole 1-2, the top surface of the sealing plug 7 is provided with a circular groove 7-1, a thrust ball bearing 8 is arranged in the circular groove 7-1, an upper ring 8-1 of the thrust ball bearing 8 can rotate, and the lower valve rod 4 is placed at the upper ring 8-1 of the thrust ball bearing 8.

The utility model discloses a theory of operation: utilize valve rod 3 to drive dish board 2 and rotate, because dish board 2 adopts the form that the outer profile face of eccentric and dish board 2 lateral part adopts the conical surface, when closing dish board 2, can prop big to metal U-shaped sealing ring 5, thereby make metal U-shaped sealing ring 5 can be by the tensioning in conical surface department, and then ensure the leakproofness, even can ensure under the great operating mode of difference in temperature that metal U-shaped sealing ring 5 does not deviate from the conical surface 2-1 department of dish board 2, thereby ensure the leakproofness under the operating mode that the difference in temperature is big, conical surface 2-1 adopts left end conical surface 2-1a and right-hand member conical surface 2-1b tapering is less than the tapered form of left end conical surface 2-1a of tapering difference, when the butterfly valve can be convenient for open, dish board 2 can easily deviate from metal U-shaped sealing ring 5, be worth.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims (3)

1. The utility model provides a novel three eccentric metal U-shaped ring seal butterfly valves, includes valve body (1), characterized by: the valve is characterized in that a disc plate (2) is arranged in the valve body (1), an upper valve rod (3) and a lower valve rod (4) which are aligned at the center are rotatably connected to the valve body (1), the disc plate (2) is eccentrically installed and fixed at the upper valve rod (3) and the lower valve rod (4), a conical surface (2-1) with a sealing surface for surfacing STL (standard template library) alloy is arranged on the outer contour surface of the side part of the disc plate (2), the conical surface (2-1) is divided into a left-end conical surface (2-1a) and a right-end conical surface (2-1b), the conicity of the left-end conical surface (2-1a) and the conicity of the right-end conical surface (2-1b) are different, a mounting groove (1-1) is formed in the valve body (1), a metal U-shaped sealing ring (5) which is U-shaped in cross section and, the diameter width of the metal U-shaped sealing ring (5) is smaller than that of the mounting groove (1-1), and a pressing sleeve (6) which is mounted on the valve body (1) and used for limiting the outward movement of the metal U-shaped sealing ring (5) is arranged on the side portion of the mounting groove (1-1).

2. The new triple offset metal U-ring seal butterfly valve of claim 1, wherein: the inner contour surface of the mounting groove (1-1) is provided with first threads (1-1a), the pressing sleeve (6) comprises a pressing body (6-1) and a limiting body (6-2), second threads (6-1a) matched with the first threads (1-1a) are arranged on the outer contour surface of the pressing body (6-1), and threaded through holes (6-2a) matched with the second threads (6-1a) are formed in the limiting body (6-2).

3. The new triple offset metal U-ring seal butterfly valve of claim 1, wherein: the improved valve is characterized in that a jack (1-2) for inserting a lower valve rod (4) is formed in the valve body (1), a sealing plug (7) welded and fixed on the valve body (1) is arranged below the jack (1-2), a round groove (7-1) is formed in the top surface of the sealing plug (7), a thrust ball bearing (8) is installed in the round groove (7-1), an upper ring (8-1) of the thrust ball bearing (8) can rotate, and the lower valve rod (4) is placed at the upper ring (8-1) of the thrust ball bearing (8).

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