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CN-224214714-U - Anti-frost crack valve

CN224214714UCN 224214714 UCN224214714 UCN 224214714UCN-224214714-U

Abstract

The utility model discloses an anti-freezing valve which comprises a valve body, valve cores and pistons, wherein the valve body is of a hollow structure with openings at the left end and the right end, the valve cores are rotatably arranged in the valve body, the pistons are arranged in the valve body in a left-right sliding mode and are used for controlling the opening and closing of the openings at the left end and the right end of the valve body, the left-right length of the pistons can be compressed, the two pistons are arranged in a left-right symmetrical mode relative to the valve cores, and when the valve cores rotate, the two pistons are pushed to slide to close the openings at the left end and the right end of the valve body first and then drive the pistons to compress. According to the utility model, the valve core is rotated to push the two pistons to slide, the openings at the left end and the right end of the valve body are closed first, and then the pistons are driven to compress, so that the space capable of containing media in the valve body is increased, the media with expanded volume after icing can be contained, and the probability of cracking the valve caused by the icing of the media is reduced.

Inventors

  • FANG FEILONG
  • YU ZHENGHUI
  • WANG MINGXIN
  • WANG BINYU
  • ZHAO JINCHAO

Assignees

  • 杭州万向职业技术学院

Dates

Publication Date
20260508
Application Date
20250623

Claims (6)

  1. 1. The valve is characterized by comprising a valve body, valve cores and pistons, wherein the valve body is of a hollow structure with openings at the left end and the right end, the valve cores are rotatably arranged in the valve body, the pistons are arranged in the valve body in a sliding manner and are used for controlling the opening and closing of the openings at the left end and the right end of the valve body, the left length and the right length of the pistons are compressible, the two pistons are arranged in bilateral symmetry relative to the valve cores, and when the valve cores rotate, the two pistons are pushed to slide to close the openings at the left end and the right end of the valve body and then drive the pistons to compress.
  2. 2. The frost crack prevention valve of claim 1, wherein the piston comprises a sleeve and a slide bar, the sleeve is arranged in the valve body in a left-right sliding manner and is propped against openings at the left end and the right end of the valve body in an outward sliding manner, an outer spring for driving the sleeve to slide into the valve body is arranged at the outer end of the sleeve, a plurality of circulation grooves distributed at equal intervals in a circumference are arranged on the side surface of the sleeve, the slide bar is arranged at the inner end of the sleeve in a left-right sliding manner, the slide bar is driven to slide outwards when the valve core rotates, an inner spring for driving the slide bar to slide inwards is arranged between the sleeve and the slide bar, and the elastic coefficient of the outer spring is smaller than that of the inner spring.
  3. 3. The frost crack prevention valve of claim 1, wherein the valve core comprises two groups of grooves which are symmetrical in center and the symmetry center is positioned on a rotation shaft of the valve core, each group of grooves comprises a first groove and a second groove, the inner end of the sliding rod is inserted into the first groove or the second groove in an adapting way when the valve core rotates, and the rotation radius of the first groove is smaller than that of the second groove.
  4. 4. The frost crack prevention valve of claim 1, wherein a handle is arranged on the upper side of the valve body, and the handle and the valve core are coaxially fixed and rotatably arranged on the valve body.
  5. 5. The frost crack prevention valve of claim 2, wherein a bellows is arranged between the sleeve and the slide bar, and two ends of the bellows are respectively connected with the sleeve and the slide bar in a sealing manner.
  6. 6. The frost crack prevention valve of claim 1, wherein the inner ends of the openings at the left end and the right end of the valve body are provided with elastic sealing rings, the sleeve is provided with an annular groove in an adapting way, the cross section of the annular groove is in a trapezoid shape with gradually reduced width from outside to inside, and the sealing rings are inserted into the annular groove in an adapting way.

Description

Anti-frost crack valve Technical Field The utility model relates to the field of valves, in particular to an anti-frost crack valve. Background Valves are critical fluid control components in numerous industrial, municipal water supply, and petrochemical industries. However, the existing valve still has residual medium in the valve body after being closed, and in cold weather environment, the medium in the valve body, such as water and other water-containing liquid, is easy to freeze in the valve body along with sudden drop of air temperature. When water freezes into ice, its volume expands to generate a great expansion force. The valve body of the valve is usually made of metal or a specific composite material, and has excellent strength and toughness under the normal working condition, but the valve body cannot bear large internal stress under the continuous and strong volume expansion action caused by freezing, and finally the valve body is cracked, so that medium leakage is caused. Disclosure of utility model The utility model aims to provide an anti-freezing valve, which drives two pistons to slide by rotating valve cores to firstly close openings at the left end and the right end of a valve body and then drive the pistons to compress, so that the space capable of containing media in the valve body is enlarged, the media with volume expansion after freezing can be contained, and the probability of cracking the valve caused by freezing of the media is reduced. The utility model solves the problems by adopting the following technical scheme: The utility model provides an anti-frost crack valve, includes valve body, case and piston, the valve body be about both ends open-ended hollow structure, the case rotates and sets up in the valve body, the piston is provided with two and all control both ends open-ended opening and closure about sliding setting is used for controlling the valve body in the valve body, the length is compressible about the piston, two pistons are bilateral symmetry setting relative the case, promote two pistons to slide when the case rotates and close the left and right sides both ends opening of valve body earlier and drive the piston compression again. In the above technical scheme, preferably, the piston include sleeve and slide bar, sleeve side-to-side sliding sets up in the valve body and sleeve outside sliding supports on the left and right sides opening of valve body, telescopic outer end is provided with the outer spring that drives the sleeve to the internal gliding of valve, be provided with a plurality of circulation grooves that are circumference equidistant distribution on the telescopic side, slide bar side-to-side sliding sets up in telescopic inner, promotes the slide bar outside sliding when the case rotates, is provided with the inside gliding inner spring of drive slide bar between sleeve and the slide bar, the elastic coefficient of outer spring is less than the elastic coefficient of inner spring. In the above technical scheme, preferably, the valve core includes two sets of grooves that are central symmetry and the symmetry center is located the axis of rotation of valve core, and every set of groove includes first recess and second recess, and the inner adaptation of slide bar inserts in first recess or the second recess when the valve core rotates, and the radius of rotation of first recess is less than the radius of rotation of second recess. In the above technical solution, preferably, a handle is provided on the upper side of the valve body, and the handle and the valve core are coaxially fixed and rotatably provided on the valve body. In the above technical scheme, preferably, a corrugated pipe is arranged between the sleeve and the slide bar, and two ends of the corrugated pipe are respectively connected with the sleeve and the slide bar in a sealing manner. In the above technical scheme, preferably, the inner ends of the openings at the left end and the right end of the valve body are provided with elastic sealing rings, the sleeve is provided with an annular groove in an adapting mode, the cross section of the annular groove is trapezoid with gradually reduced width from outside to inside, and the sealing rings are inserted into the annular groove in an adapting mode. Compared with the prior art, the utility model has the following advantages and effects: According to the utility model, the two pistons are driven to rotate to push the two pistons to slide so as to close the openings at the left end and the right end of the valve body, so that the valve is closed, at the moment, water or water-containing medium is filled in the valve body, the two pistons are continuously rotated to compress the two pistons so as to reduce the space occupied by the pistons in the valve body, the space capable of containing the medium in the valve body is increased, and as the openings at the left end and the right end of the valve body are already closed, no medium flows