Anti-frost-crack valve

Abstract

The frost crack prevention valve comprises a valve body, a valve element and pistons, the valve body is of a hollow structure with openings in the left end and the right end, the valve element is arranged in the valve body in a rotating mode, and the two pistons are arranged in the valve body in a left-right sliding mode and used for controlling the openings in the left end and the right end of the valve body to be opened and closed. The left-right length of the pistons can be compressed, the two pistons are bilaterally symmetrically arranged relative to the valve element, and when the valve element rotates, the two pistons are pushed to slide to close openings in the left end and the right end of the valve body firstly and then drive the pistons to be compressed. The two pistons are pushed to slide by rotating the valve element to close the openings in the left end and the right end of the valve body firstly and then drive the pistons to be compressed, so that the space capable of containing media in the valve body is enlarged and can contain media which are expanded in volume after freezing, and the probability that the valve cracks due to medium freezing is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to an anti-freeze crack valve. Background Technology

[0002] Valves are critical fluid control components in numerous industrial production, municipal water supply, and petrochemical fields. However, existing valves retain residual media even after closure. In cold weather, as temperatures plummet, the media within the valve body, such as water and other water-containing liquids, are prone to freezing. When water freezes, its volume expands, generating tremendous expansion force. While valve bodies are typically made of metal or specific composite materials, possessing excellent strength and toughness under normal operating conditions, they cannot withstand the sustained and intense volume expansion caused by freezing. This leads to the valve body cracking and media leakage. Utility Model Content

[0003] The purpose of this utility model is to provide an anti-freeze crack valve. This valve, by rotating the valve core, pushes two pistons to slide and first close the openings at both ends of the valve body, and then drives the pistons to compress, thereby increasing the space in the valve body that can hold the medium, which can accommodate the medium that expands in volume after freezing, and reducing the probability of the valve cracking due to the medium freezing.

[0004] The technical solution adopted by this utility model to solve the above problems is:

[0005] An anti-freeze crack valve includes a valve body, a valve core, and pistons. The valve body is a hollow structure with openings at both the left and right ends. The valve core is rotatably disposed within the valve body. Two pistons are disposed within the valve body and are slidably disposed to control the opening and closing of the openings at both ends of the valve body. The left and right lengths of the pistons are compressible. The two pistons are symmetrically disposed relative to the valve core. When the valve core rotates, it pushes the two pistons to slide and first close the openings at both ends of the valve body, and then drives the pistons to compress.

[0006] In the above technical solution, preferably, the piston includes a sleeve and a slide rod. The sleeve is slidably disposed in the valve body and slides outward against the openings at both ends of the valve body. An outer spring is provided at the outer end of the sleeve to drive the sleeve to slide into the valve body. Several flow grooves are provided on the side of the sleeve at equal intervals around the circumference. The slide rod is slidably disposed in the inner end of the sleeve. When the valve core rotates, it pushes the slide rod to slide outward. An inner spring is provided between the sleeve and the slide rod to drive the slide rod to slide inward. The elastic coefficient of the outer spring is smaller than that of the inner spring.

[0007] In the above technical solution, preferably, the valve core includes two sets of grooves that are centrally symmetrical and the center of symmetry is located on the rotation axis of the valve core. Each set of grooves includes a first groove and a second groove. When the valve core rotates, the inner end of the slide rod is adapted to be inserted into the first groove or the second groove. The rotation radius of the first groove is smaller than the rotation radius of the second groove.

[0008] In the above technical solution, preferably, a handle is provided on the upper side of the valve body, and the handle is coaxially fixed with the valve core and rotatably mounted on the valve body.

[0009] In the above technical solution, preferably, a bellows is provided between the sleeve and the slide rod, and the two ends of the bellows are respectively sealed to the sleeve and the slide rod.

[0010] In the above technical solution, preferably, the inner ends of the openings at both the left and right ends of the valve body are provided with elastic sealing rings, and the sleeve is adapted to be provided with an annular groove. The cross-section of the annular groove is a trapezoid with a gradually decreasing width from the outside to the inside, and the sealing ring is adapted to be inserted into the annular groove.

[0011] Compared with the prior art, this utility model has the following advantages and effects:

[0012] This invention achieves valve closure by driving the valve core to rotate, which in turn pushes two pistons to slide and close the openings at both ends of the valve body. At this time, the valve body is filled with water or water-containing medium. Continuing to rotate the valve core compresses the two pistons, thereby reducing the space occupied by the pistons in the valve body and increasing the space that the valve body can hold the medium. Since the openings at both ends of the valve body are closed, no more medium will flow into the valve body. The increased space can accommodate the medium that expands in volume after freezing, which can reduce the probability of the valve cracking due to the medium freezing in cold environments, and allow the valve to be reused after the medium melts. Attached Figure Description

[0013] Figure 1 This is a front sectional view of the antifreeze crack valve according to an embodiment of this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the valve closing mechanism.

[0015] Figure 3 yes Figure 2 A schematic diagram of the piston compression mechanism.

[0016] Figure 4 yes Figure 1 Top sectional view.

[0017] Figure 5 yes Figure 1 Side view of the middle sleeve.

[0018] The valve body consists of a valve core, a first groove, a second groove, a piston, a sleeve, a slide rod, an outer spring, a flow groove, an inner spring, a bellows, a sealing ring, an annular groove, and a handle. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0020] In this embodiment, the inner end refers to the end closer to the valve core 2, and the outer end refers to the end farther away from the valve core 2.

[0021] See Figures 1-5 This embodiment discloses an anti-freeze cracking valve, including a valve body 1, a valve core 2, and a piston 3. The valve body 1 is a hollow structure with openings at both the left and right ends. The valve core 2 is rotatably disposed inside the valve body 1. Two pistons 3 are disposed and are slidably disposed inside the valve body 1 to control the opening and closing of the openings at both ends of the valve body 1. The left and right lengths of the pistons 3 are compressible. The two pistons 3 are symmetrically disposed relative to the valve core 2. When the valve core 2 rotates, it pushes the two pistons 3 to slide and first close the openings at both ends of the valve body 1, and then drives the pistons 3 to compress.

[0022] This invention achieves valve closure by driving the valve core 2 to rotate, which in turn pushes the two pistons 3 to slide, thereby closing the openings at both ends of the valve body 1. At this time, the valve body 1 is filled with water or water-containing medium. Continuing to rotate the valve core 2 compresses the two pistons 3, thereby reducing the space occupied by the pistons 3 in the valve body 1. This increases the space in the valve body 1 that can hold the medium. Since the openings at both ends of the valve body 1 are closed, no more medium will flow into the valve body 1. The increased space can accommodate the medium that expands in volume after freezing, which can reduce the probability of the valve cracking due to the medium freezing in cold environments. This allows the valve to be reused after the medium melts.

[0023] See Figure 1 A handle 4 is provided on the upper side of the valve body 1. The handle 4 is coaxially fixed with the valve core 2 and rotatably mounted on the valve body 1.

[0024] The handle 4 facilitates the rotation of the valve core 2 from the outside of the valve body 1, improving the convenience of valve control.

[0025] See Figures 1-3The piston 3 includes a sleeve 31 and a slide rod 32. The sleeve 31 is slidably disposed inside the valve body 1 and slides outward against the openings at both ends of the valve body 1. An outer spring 33 is provided at the outer end of the sleeve 31 to drive the sleeve 31 to slide inward into the valve body 1. Several flow grooves 34 are provided on the side of the sleeve 31 at equal intervals around the circumference. The slide rod 32 is slidably disposed at the inner end of the sleeve 31. When the valve core 2 rotates, it pushes the slide rod 32 to slide outward. An inner spring 35 is provided between the sleeve 31 and the slide rod 32 to drive the slide rod 32 to slide inward. The elastic coefficient of the outer spring 33 is smaller than that of the inner spring 35.

[0026] When valve core 2 rotates, it abuts against slide rod 32 and pushes slide rod 32 outward. Since the elastic coefficient of outer spring 33 is less than that of inner spring 35, outer spring 33 is compressed first. Sleeve 31 and slide rod 32 slide outward as a whole, so that sleeve 31 abuts against the openings at both ends of valve body 1 to close the valve (e.g., Figure 2 As shown in the diagram, when the valve core 2 continues to rotate, it pushes the slide rod 32 to slide, causing the inner spring 35 to compress. The slide rod 32 then inserts into the sleeve 31, achieving the purpose of driving the piston 3 to compress (as shown in the diagram). Figure 3 As shown in the figure, this utility model achieves the purpose of first closing the valve and then driving the piston 3 to compress by rotating the valve core 2, which has the advantage of simple operation. When rotating the valve core 2 to reset, the sleeve 31 and the slide rod 32 are reset under the action of the outer spring 33 and the inner spring 35. The medium flows into the valve body 1 through the flow groove 34 on the sleeve 31 and flows out of the valve body 1, realizing the opening of the valve.

[0027] See Figure 4 The valve core 2 includes two sets of grooves that are centrally symmetrical and the center of symmetry is located on the rotation axis of the valve core 2. Each set of grooves includes a first groove 21 and a second groove 22. When the valve core 2 rotates, the inner end of the slide rod 32 is adapted to be inserted into the first groove 21 or the second groove 22. The rotation radius of the first groove 21 is smaller than the rotation radius of the second groove 22.

[0028] When the valve core 2 is rotated, causing the inner end of the slide rod 32 to insert into the first groove 21, the sleeve 31 abuts against the openings at both ends of the valve body 1, thus closing the valve. This is suitable for ambient temperatures where the medium will not freeze, improving the convenience of rotating the valve core 2 in non-cold environments. When the valve core 2 is rotated, causing the inner end of the slide rod 32 to insert into the second groove 22, the slide rod 32 inserts into the sleeve 31, compressing the piston 3. This is suitable for ambient temperatures where the medium will freeze. The locking effect of the piston 3 is achieved through the cooperation and insertion of the slide rod 32 and its inner end into the first and second grooves 21 and 22. This reduces the risk of the piston 3 opening due to slippage between the slide rod 32 and the valve core 2, thus ensuring the stability of the valve core 2's locking of the piston 3.

[0029] See Figure 2 , Figure 3 A bellows 36 is provided between the sleeve 31 and the slide rod 32, and the two ends of the bellows 36 are respectively sealed to the sleeve 31 and the slide rod 32.

[0030] When the slide rod 32 moves relative to the sleeve 31, the bellows 36 can extend and retract with the movement of the slide rod 32, so that both ends of the bellows 36 are always sealed and connected to the sleeve 31 and the slide rod 32. This prevents the medium from flowing into the sleeve 31 and causing the medium in the sleeve 31 to flow out into the valve body 1 when the piston 3 is compressed, which would eventually lead to an increase in the medium in the valve body 1 and make it unable to accommodate the frozen medium. This ensures the normal function of this utility model.

[0031] See Figure 3 , Figure 4 The valve body 1 has an elastic sealing ring 37 at the inner end of the opening at both the left and right ends. The sleeve 31 is fitted with an annular groove 38. The cross-section of the annular groove 38 is a trapezoid with the width gradually decreasing from the outside to the inside. The sealing ring 37 is fitted into the annular groove 38.

[0032] When the drive sleeve 31 slides outward against the openings at both ends of the valve body 1, the sealing ring 37 can be inserted into the annular groove 38 and undergo elastic deformation within the trapezoidal annular groove 38, thereby improving the fit between the sealing ring 37 and the annular groove 38 and enhancing the sealing effect of the piston 3 on the left and right openings of the valve body 1.

[0033] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A freeze-proof valve, characterized in that: The valve body includes a valve body, a valve core, and a piston. The valve body is a hollow structure with openings at both the left and right ends. The valve core is rotatably mounted inside the valve body. There are two pistons, both of which are slidably mounted inside the valve body to control the opening and closing of the openings at both ends of the valve body. The length of the pistons is compressible. The two pistons are symmetrically arranged relative to the valve core. When the valve core rotates, it pushes the two pistons to slide and first close the openings at both ends of the valve body, and then drives the pistons to compress.

2. The anti-freeze crack valve according to claim 1, characterized in that: The piston includes a sleeve and a slide rod. The sleeve is slidably disposed within the valve body and slides outward against the openings at both ends of the valve body. An outer spring is provided at the outer end of the sleeve to drive the sleeve to slide into the valve body. Several flow grooves are provided on the side of the sleeve at equal intervals around the circumference. The slide rod is slidably disposed at the inner end of the sleeve. When the valve core rotates, it pushes the slide rod to slide outward. An inner spring is provided between the sleeve and the slide rod to drive the slide rod to slide inward. The elastic coefficient of the outer spring is smaller than that of the inner spring.

3. The antifreeze crack valve according to claim 1, characterized in that: The valve core includes two sets of centrally symmetrical grooves with the center of symmetry located on the rotation axis of the valve core. Each set of grooves includes a first groove and a second groove. When the valve core rotates, the inner end of the slide rod is adapted to be inserted into the first groove or the second groove. The rotation radius of the first groove is smaller than the rotation radius of the second groove.

4. The anti-freeze crack valve according to claim 1, characterized in that: The valve body is provided with a handle on its upper side. The handle is coaxially fixed with the valve core and rotatably mounted on the valve body.

5. The antifreeze crack valve according to claim 2, characterized in that: A bellows is provided between the sleeve and the slide rod, and the two ends of the bellows are respectively sealed to the sleeve and the slide rod.

6. The anti-freeze crack valve according to claim 1, characterized in that: The valve body has elastic sealing rings at the inner ends of the openings at both the left and right ends, and an annular groove is adapted to be provided on the sleeve. The cross-section of the annular groove is a trapezoid with the width gradually decreasing from the outside to the inside, and the sealing ring is adapted to be inserted into the annular groove.

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