A freeze protection device

Abstract

The utility model provides an anti -freezing device belongs to mechanical technical field, it solved the problem that the existing pipeline remained water is frozen because of low ambient temperature. The anti -freezing device, including the main part, is provided with check valve assembly in the water inlet, the bottom of main part is fixedly connected with the drainage shell, is provided with temperature -sensing element, drain valve core and drainage spring in the drainage shell, temperature -sensing element sets up in the top of drain valve core and forms the water gap between the outside of temperature -sensing element and the inner wall of drainage shell, is provided with the drain hole on the lateral wall of drainage shell bottom and penetrates, temperature -sensing element stretches when along vertical direction can push drain valve core and overcome the elastic force of drainage spring and descend and block the drain hole, temperature -sensing element contracts when along vertical direction, drain valve core can be under the elastic force of drainage spring and ascend and make the water gap and drain hole intercommunication. The anti -freezing device can effectively prevent being frozen because of low ambient temperature.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an antifreeze device. Background Technology

[0002] With the improvement of people's technological living standards, water delivery pipelines play a crucial role in our production and daily life, bringing great convenience. However, when winter arrives or the ambient temperature is too low, the water remaining in the pipelines will freeze, which not only hinders the subsequent water delivery but also easily causes the pipelines to crack, causing great inconvenience and losses to people.

[0003] In response to this situation, a conventional technical approach that would be readily apparent to those skilled in the art is to connect a drain valve at a lower position in the pipeline, and to open the drain valve when no water supply is being provided to drain the residual water in the pipeline, thereby preventing the water from remaining in the pipeline and freezing.

[0004] However, if a handle-type drain valve is used, it requires manual operation, which is extremely inconvenient. If an electrically controlled valve is used, not only are the wiring and maintenance costs higher, but the electronic components are also prone to damage in the low temperatures of the outdoors, thus causing inconvenience for drainage. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an antifreeze device that solves the problem of residual water in existing pipelines freezing due to low ambient temperature.

[0006] The objective of this utility model can be achieved through the following technical solutions: An antifreeze device includes a tubular, horizontally arranged main body with an inlet at the right end and an outlet at the left end. A check valve assembly is installed inside the inlet to allow water to flow unidirectionally from right to left. The device is characterized by a drain shell fixedly connected to the bottom of the main body, with the inner cavity of the drain shell communicating with the outlet. The drain shell contains a temperature-sensing element, a drain valve core, and a drain spring. The temperature-sensing element is positioned above the drain valve core, and a water-passing gap is formed between the outer side of the temperature-sensing element and the inner wall of the drain shell. A drain hole is formed through the side wall at the bottom of the drain shell. When the temperature-sensing element extends vertically, it pushes the drain valve core downwards against the elastic force of the drain spring, blocking the drain hole. When the temperature-sensing element contracts vertically, the drain valve core moves upwards under the elastic force of the drain spring, connecting the water-passing gap with the drain hole.

[0007] This antifreeze device is used to connect to the water inlet of the pipeline. The temperature sensing element inside is an existing product, such as a temperature sensing bulb. This temperature sensing element can automatically contract when the temperature is low and automatically expand when the temperature is high.

[0008] After this antifreeze device is connected to the pipeline, if water usage stops, water will remain on the side of the check valve component facing the outlet. When the ambient temperature is high, the temperature sensing element extends vertically, pushing the drain valve core downwards to overcome the spring force of the drain spring and block the drain hole. At this time, no water is drained from the drain housing, and water can flow normally within the main body. When the ambient temperature is low, the temperature sensing element retracts vertically, and the drain valve core moves upwards under the spring force of the drain spring, no longer blocking the drain hole, allowing the drain hole to connect with the water passage gap. Since the drain housing is connected to the bottom of the main body and the drain hole is located at the bottom of the drain housing, as long as this antifreeze device is installed at the lowest position in the pipeline, the water inside the main body will be discharged outwards through the water passage gap and the drain hole. Once the residual water inside the main body is drained, the water in the pipeline will not freeze, avoiding any impact on water supply and preventing pipeline cracking.

[0009] In the aforementioned antifreeze device, a sensing hole and a connecting hole are provided through the bottom of the main body. The sensing hole is directly opposite the temperature sensing element, with the upper end of the temperature sensing element abutting against the lower end of the sensing hole. The connecting hole connects the water outlet and the water passage gap. The sensing hole allows the temperature sensing element to contact the water flow inside the main body, enabling the temperature sensing element to react according to the water temperature. The connecting hole is offset from the position of the temperature sensing element, always connecting the water outlet and the water passage gap to ensure smooth and stable drainage.

[0010] In the aforementioned antifreeze device, the inner wall of the drain housing has a protruding annular shoulder, and the outer side of the temperature sensing element has a protruding annular shoulder. An annular limiting spring is also provided inside the drain housing. The lower end of the temperature sensing element passes through the limiting spring and abuts against the drain valve core. A water-closing spring is sleeved on the outer side of the upper end of the temperature sensing element. The upper end of the water-closing spring abuts against the drain housing, and the lower end of the water-closing spring presses the shoulder of the temperature sensing element tightly against the upper side of the limiting spring. The lower side of the limiting spring abuts against the upper side of the shoulder. The water-closing spring ensures that the temperature sensing element always has a downward pressure tendency, guaranteeing the stability of the drain valve core closing the drain hole. The limiting spring limits the lower side of the temperature sensing element, preventing it from pressing against the drain valve core under the elastic force of the water-closing spring when the temperature sensing element contracts, thus ensuring reliable drainage.

[0011] In the aforementioned antifreeze device, the upper end of the drain valve core has a downwardly recessed hole, the lower end of the temperature sensing element extends into the recessed hole, and a side hole communicating with the recessed hole is provided through the side portion of the upper end of the drain valve core. The recessed hole provides radial restraint for the temperature sensing element and ensures the stability of the force applied by the temperature sensing element to the drain valve core. The side hole is used to balance the internal and external pressures at the upper end of the drain valve core, ensuring operational stability.

[0012] In the aforementioned antifreeze device, the inner sides of the drain shell, both above and below the drain hole, have cylindrical surfaces. The diameter of the cylindrical surface above the drain hole is larger than the diameter of the cylindrical surface below the drain hole. Annular sealing rings are fixed to the outer side of the drain valve core at the locations opposite the two cylindrical surfaces. The outer sides of the two sealing rings abut against the two cylindrical surfaces to form a seal. The outer diameter of the sealing ring below the drain hole is smaller than the diameter of the cylindrical surface above the drain hole. Since the inner wall of the drain shell is wider at the top and narrower at the bottom, when the drain valve core moves upwards until the lower sealing ring is higher than or flush with the drain hole, the drain hole can communicate with the water passage gap. This ensures the effectiveness of the drain hole seal while shortening the stroke of the drain valve core to open the drain hole, resulting in a more sensitive response.

[0013] In the aforementioned antifreeze device, the top of the main body has an upwardly protruding annular neck, and the inner hole of the neck is connected to the water outlet. A cylindrical mounting seat is threaded to the inner side of the upper end of the neck. The inner side of the mounting seat has a protruding annular protrusion. A cylindrical top cover is threaded to the inner side of the upper end of the mounting seat, and the opening end of the top cover faces downward. The upper end of the top cover extends out of the mounting seat, and a vent hole is opened through the side of the upper end of the top cover. A rod-shaped valve core is inserted inside the top cover, and there are gaps between the outer side of the valve core and the inner wall of the top cover, as well as between the outer side of the valve core and the inner wall of the mounting seat. The lower outer side of the valve core has a protruding annular sealing part. The vertical length of the sealing part is less than the vertical distance between the upper side of the protrusion and the lower end of the top cover. When the sealing part moves upward, it can abut against the lower end of the top cover and seal the lower port of the top cover. A notch is opened at the bottom of the sealing part, and the notch always connects to the water outlet and the gap between the outer side of the valve core and the inner wall of the mounting seat. When the main body is filled with medium, the valve core rises under the pressure inside the main body, sealing the lower port of the top cover and keeping the neck of the main body sealed to ensure the sealing of the medium transport. Conversely, when the main body is not transporting medium, the valve core loses pressure and falls naturally. Air from outside the main body can enter the main body through the vent, the gap between the valve core and the top cover, the gap between the valve core and the mounting base, and the notch, maintaining the air pressure balance inside and outside the main body, breaking the vacuum state that may occur inside the main body, avoiding the possibility of the main body or pipeline cracking, and ensuring the service life of the pipeline.

[0014] Compared with existing technologies, this antifreeze device, through the cooperation of components such as temperature sensing elements and drain valve cores, allows the drain valve core to move upward under the elastic force of the drain spring when the ambient temperature is low, thus no longer blocking the drain hole. The water inside the main body will then be discharged outward through the water gap and drain hole. Once the residual water inside the main body is drained, the water in the pipeline will not freeze, thus avoiding the impact on water delivery and the possibility of pipeline cracking. Attached Figure Description

[0015] Figure 1This is a cross-sectional structural diagram of the antifreeze device.

[0016] In the diagram, 1. Main body; 1a. Inlet; 1b. Outlet; 1c. Sensing hole; 1d. Connecting hole; 1e. Neck; 2. Check valve assembly; 3. Drain shell; 3a. Drain hole; 3b. Shoulder; 3c. Cylindrical surface; 4. Temperature sensing element; 4a. Protruding shoulder; 5. Drain valve core; 5a. Concave hole; 5b. Side hole; 6. Drain spring; 7. Water passage gap; 8. Limiting spring; 9. Water shut-off spring; 10. Sealing ring; 11. Mounting base; 11a. Protrusion; 12. Top cover; 12a. Vent hole; 13. Valve core; 13a. Sealing part; 13b. Notch. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figure 1 As shown, this antifreeze device includes a main body 1 that is cylindrical and horizontally arranged. The right end of the main body 1 has a water inlet 1a, and the left end has a water outlet 1b. A check valve assembly 2 is installed in the water inlet 1a to allow water to flow unidirectionally from right to left. Here, the check valve assembly 2 includes a cylindrical valve seat sealed and fixed in the main body 1, an umbrella-shaped check valve element passing through the valve seat, and a check spring. The head of the check valve element faces the direction of the water inlet 1a, and the rod of the check valve element faces the direction of the water outlet 1b and passes through the left end of the valve seat. The left end of the check spring abuts against the valve seat, and the right end of the check spring abuts against the left side of the head of the check valve element. Under the elastic force of the check spring, the check valve element abuts against the inner side of the right end of the valve seat and seals the inner hole of the valve seat.

[0019] The bottom of the main body 1 is provided with a roughly cylindrical drainage shell 3, with the open end of the drainage shell 3 facing upward and threadedly connected to the bottom of the main body 1. A sensing hole 1c and a connecting hole 1d are provided through the bottom of the main body 1 corresponding to the drainage shell 3, and the inner cavity of the drainage shell 3 is connected to the water outlet 1b through the connecting hole 1d.

[0020] The drain housing 3 contains a temperature sensing element 4, a water-closing spring 9, an annular elastic limiting spring 8, a drain valve core 5, and a drain spring 6. The inner wall of the drain housing 3 has a protruding annular shoulder 3b, and the outer side of the temperature sensing element 4 has a protruding annular shoulder 4a. The lower side of the limiting spring 8 abuts against the upper side of the shoulder 3b. The water-closing spring 9 is sleeved on the outer side of the upper end of the temperature sensing element 4, with its upper end abutting against the inner wall of the drain housing 3 and its lower end abutting against the upper side of the shoulder 4a. The lower side of the shoulder 4a abuts against the upper side of the limiting spring 8. The sensing hole 1c is directly opposite the temperature sensing element 4, and the upper end of the temperature sensing element 4 always abuts against the lower port of the sensing hole 1c. A cylindrical water passage gap 7 is formed between the outer side of the temperature sensing element 4 and the inner wall of the drain housing 3, and this water passage gap 7 is connected to the outlet 1b through a connecting hole 1d.

[0021] The drain valve core 5 is located below the temperature sensing element 4 and the limiting spring 8. The upper end of the drain valve core 5 has a downwardly recessed hole 5a. The lower end of the temperature sensing element 4 passes through the inner hole of the limiting spring 8 and extends into the recessed hole 5a. The lower end of the temperature sensing element 4 abuts against the bottom surface of the recessed hole 5a. A side hole 5b communicating with the recessed hole 5a is provided through the side portion of the upper end of the drain valve core 5. The outer side of the upper end of the drain valve core 5 has a horizontally protruding, annular flange. A drain spring 6 is sleeved on the outer side of the drain valve core 5. The lower end of the drain spring 6 abuts against the inner wall of the drain housing 3, and the upper end of the drain spring 6 abuts against the lower side of the flange.

[0022] Several drainage holes 3a are provided through the side wall at the bottom of the drainage shell 3, and the drainage holes 3a are evenly distributed around the axis of the drainage shell 3. The inner side of the drainage shell 3 above and below the drainage holes 3a has a cylindrical surface 3c, and the diameter of the cylindrical surface 3c above the drainage hole 3a is larger than the diameter of the cylindrical surface 3c below the drainage hole 3a. Both cylindrical surfaces 3c are arranged adjacent to the drainage holes 3a. The outer side of the drain valve core 5 is provided with an annular sealing groove on the opposite side of the two cylindrical surfaces 3c. An annular sealing ring 10 is provided in each of the two sealing grooves. The outer sides of the two sealing rings 10 abut against the two cylindrical surfaces 3c respectively to form a seal. The outer diameter of the sealing ring 10 located below the drain hole 3a is smaller than the diameter of the cylindrical surface 3c located above the drain hole 3a. This makes it so that when the lower sealing ring 10 moves to be opposite the upper cylindrical surface 3c, the outer side of the sealing ring 10 and the cylindrical surface 3c do not abut against each other, forming a gap connecting the drain hole 3a and the water passage gap 7.

[0023] The top of the main body 1 has an upwardly protruding, annular neck 1e, the inner hole of which is connected to the outlet 1b. A cylindrical mounting base 11 is threaded onto the inner side of the upper end of the neck 1e. The inner side of the mounting base 11 has a protruding, annular protrusion 11a. A cylindrical top cover 12 is threaded onto the inner side of the upper end of the mounting base 11, with the open end of the top cover 12 facing downwards. The upper end of the top cover 12 extends beyond the mounting base 11, and a vent hole 12a is provided through the side portion of the upper end of the top cover 12 extending beyond the mounting base 11. A rod-shaped valve core 13 passes through the top cover 12, and gaps exist between the outer side of the valve core 13 and the inner wall of the top cover 12, as well as between the outer side of the valve core 13 and the inner wall of the mounting base 11. The lower outer side of the valve core 13 has a protruding annular sealing portion 13a. The vertical length of the sealing portion 13a is less than the vertical distance between the upper side of the protrusion 11a and the lower end of the top cover 12, allowing the sealing portion 13a to move up and down. When the sealing portion 13a moves upward, it can abut against the lower end of the top cover 12 and seal the lower port of the top cover 12. A notch 13b is provided from the bottom to the side of the sealing portion 13a. This notch 13b always connects the outlet 1b and the gap between the outer side of the valve core 13 and the inner wall of the mounting base 11.

[0024] This antifreeze device is used to connect to the water inlet of the pipeline. The temperature sensing element 4 inside is an existing product, such as a temperature sensing bulb. The temperature sensing element 4 can automatically contract when the temperature is low and automatically expand when the temperature is high.

[0025] After this antifreeze device is connected to the pipeline, if the water supply is stopped, water will remain on the side of the check valve component 2 facing the outlet 1b.

[0026] When the ambient temperature is high, the temperature sensing element 4 extends vertically, and its lower end pushes the drain valve core 5 downward to overcome the elastic force of the drain spring 6, causing the two sealing rings 10 to abut against the two cylindrical surfaces 3c above and below the drain hole 3a and form a seal, blocking the drain hole 3a. At this time, no water is drained from the drain shell 3, and water can flow normally within the main body 1.

[0027] When the ambient temperature is low, the temperature sensing element 4 contracts vertically, and the drain valve core 5 moves upward under the elastic force of the drain spring 6 until the lower sealing ring 10 is located above the drain hole 3a, thus connecting the drain hole 3a with the water passage gap 7. Because the drain shell 3 is connected to the bottom of the main body 1 and the drain hole 3a is located at the bottom of the drain shell 3, the water inside the main body 1 will be discharged outward through the water passage gap 7 and the drain hole 3a. Once the residual water inside the main body 1 is drained, the water in the pipeline will not freeze, thus avoiding any impact on water supply and the possibility of pipeline cracking.

[0028] During the use of this antifreeze device, when the main body 1 is filled with medium, the valve core 13 is pushed upward by the pressure inside the main body 1, sealing the lower port of the top cover 12, thus keeping the neck 1e of the main body 1 sealed and ensuring the sealing of the medium transport. Conversely, when the main body 1 is not transporting medium, the valve core 13 loses the upward pressure applied from below, and the valve core 13 falls naturally and abuts against the upper side of the protrusion 11a. Air from outside the main body 1 can enter the main body 1 through the vent 12a, the gap between the valve core 13 and the top cover 12, the gap between the valve core 13 and the mounting base 11, and the notch 13b, maintaining the air pressure balance inside and outside the main body 1 and breaking the vacuum state that may occur inside the main body 1.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An antifreeze device comprising a tubular and horizontally arranged main body (1), the main body (1) having a water inlet (1a) at its right end and a water outlet (1b) at its left end, wherein a check valve component (2) is provided in the water inlet (1a) to allow water to flow unidirectionally from right to left, characterized in that, The bottom of the main body (1) is fixedly connected to a drain shell (3), and the inner cavity of the drain shell (3) is connected to the outlet (1b). The drain shell (3) is provided with a temperature sensing element (4), a drain valve core (5) and a drain spring (6). The temperature sensing element (4) is located above the drain valve core (5), and a water passage gap (7) is formed between the outer side of the temperature sensing element (4) and the inner wall of the drain shell (3). A drain hole (3a) is provided through the side wall at the bottom of the drain shell (3). When the temperature sensing element (4) extends in the vertical direction, it can push the drain valve core (5) to move down against the elastic force of the drain spring (6) and block the drain hole (3a). When the temperature sensing element (4) contracts in the vertical direction, the drain valve core (5) can move up under the elastic force of the drain spring (6) and make the water passage gap (7) connect with the drain hole (3a).

2. The antifreeze device according to claim 1, characterized in that, The bottom of the main body (1) is provided with a sensing hole (1c) and a connecting hole (1d). The sensing hole (1c) is directly opposite the temperature sensing element (4) and the upper end of the temperature sensing element (4) abuts against the lower port of the sensing hole (1c). The connecting hole (1d) connects the water outlet (1b) and the water passage gap (7).

3. An antifreeze device according to claim 1 or 2, characterized in that, The inner wall of the drain shell (3) has a protruding annular shoulder (3b), and the outer side of the temperature sensing element (4) has a protruding annular shoulder (4a). The drain shell (3) is also provided with an annular limiting spring (8). The lower end of the temperature sensing element (4) passes through the limiting spring (8) and abuts against the drain valve core (5). A water-closing spring (9) is sleeved on the outer side of the upper end of the temperature sensing element (4). The upper end of the water-closing spring (9) abuts against the drain shell (3), and the lower end of the water-closing spring (9) presses the shoulder (4a) of the temperature sensing element (4) tightly against the upper side of the limiting spring (8). The lower side of the limiting spring (8) abuts against the upper side of the shoulder (3b).

4. The antifreeze device according to claim 3, characterized in that, The upper end of the drain valve core (5) is provided with a downward recessed hole (5a), the lower end of the temperature sensing element (4) extends into the recessed hole (5a), and the side of the upper end of the drain valve core (5) is provided with a side hole (5b) that communicates with the recessed hole (5a).

5. An antifreeze device according to claim 1 or 2, characterized in that, The drain shell (3) has cylindrical surfaces (3c) on its inner sides above and below the drain hole (3a). The diameter of the cylindrical surface (3c) above the drain hole (3a) is larger than the diameter of the cylindrical surface (3c) below the drain hole (3a). The outer side of the drain valve core (5) is fixed with an annular sealing ring (10) opposite to the two cylindrical surfaces (3c). The outer sides of the two sealing rings (10) abut against the two cylindrical surfaces (3c) respectively and form a seal. The outer diameter of the sealing ring (10) below the drain hole (3a) is smaller than the diameter of the cylindrical surface (3c) above the drain hole (3a).

6. An antifreeze device according to claim 1 or 2, characterized in that, The top of the main body (1) has an upwardly protruding annular neck (1e), and the inner hole of the neck (1e) is connected to the outlet (1b). A cylindrical mounting seat (11) is threaded to the inner side of the upper end of the neck (1e). The inner side of the mounting seat (11) has a protruding annular protrusion (11a). A cylindrical top cover (12) is threaded to the inner side of the upper end of the mounting seat (11), and the opening end of the top cover (12) is set downward. The upper end of the top cover (12) extends out of the mounting seat (11), and a vent hole (12a) is opened through the side of the upper end of the top cover (12). A rod-shaped valve core (13) is inserted inside the top cover (12). There are gaps between the outer side of the valve core (13) and the inner wall of the top cover (12), and between the outer side of the valve core (13) and the inner wall of the mounting base (11). The lower outer side of the valve core (13) has a protruding annular sealing part (13a). The vertical length of the sealing part (13a) is less than the vertical distance between the upper side of the protrusion (11a) and the lower end of the top cover (12). When the sealing part (13a) moves upward, it can abut against the lower end of the top cover (12) and block the lower port of the top cover (12). A notch (13b) is opened at the bottom of the sealing part (13a). The notch (13b) always connects the water outlet (1b) and the gap between the outer side of the valve core (13) and the inner wall of the mounting base (11).

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