Frost valve

Abstract

The utility model provides a frost valve, and belongs to the technical field of valves. The problem that the working reliability cannot be guaranteed for a long time is solved. The valve comprises a valve body provided with a flow channel in the transverse direction, a drainage part is arranged at the lower end of the valve body, a drainage hole is formed in the bottom of the drainage part, an inner hole communicating the flow channel with the drainage hole is formed in the drainage part, a first supporting spring, a temperature bulb and an elastic sealing assembly are sequentially arranged in the drainage part from top to bottom, and the first supporting spring, the temperature bulb and the elastic sealing assembly abut against one another in sequence. The temperature bulb can control the elastic sealing assembly to open or close the drainage hole, a positioning piece is fixed in the drainage part and provided with a through connecting hole in the axial direction of the drainage part, an adjusting head is in threaded connection with the interior of the connecting hole, the adjusting head is provided with a through hole in the axial direction of the drainage part, and the lower end of the adjusting head is located outside the connecting hole. The upper end of the first supporting spring abuts against the lower end of the adjusting head. The device has the advantages of being high in working reliability in long-time use and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to an antifreeze valve. Background Art

[0002] In real-world piping systems, it is common to encounter situations where pipes are connected from the outdoors to indoors. Usually, when the system is not in operation, water will remain in the pipes. Obviously, in a low-temperature environment, the water remaining in the outdoor pipes is prone to freezing, causing the pipes to freeze. This phenomenon is particularly evident in the north.

[0003] In order to solve the problem of outdoor pipes being easily frozen in low temperature environments, someone has designed a new antifreeze valve with patent application number 202321012751.6, which includes a valve body and a vacuum valve assembly arranged on the valve body, the two ends of the valve body are respectively a water inlet and a water outlet, a non-return core assembly is arranged on the valve body at a position opposite to the vacuum valve assembly, and a constant temperature valve core assembly is connected to the lower part of the non-return core assembly; the non-return core assembly consists of a non-return joint and a non-return core body, the non-return joint is connected to the valve body, the non-return core body is movably arranged in the non-return joint, and a column is sleeved on the lower end of the non-return core body The thermostatic valve core assembly is composed of a thermostatic valve core body and a thermostatic valve core cap connected to each other. The thermostatic valve core cap is assembled on the non-return joint. The thermostatic valve core body is provided with a thermal element and a cylindrical spring 2 that cooperates with the thermal element. The lower end of the thermal element is equipped with a copper core. A connector with a drain hole is installed at the bottom of the thermostatic valve core body. A solid rubber gasket is provided at the bottom of the copper core to seal the drain hole. When in use, the valve body is connected to an outdoor pipe. Under normal conditions, the lower end of the thermistor presses against the copper core to block the drain hole; when the temperature drops, the thermistor contracts, and the elastic force of the second column spring is greater than that of the first column spring, so that the copper core moves upward and separates from the connector under the elastic force of the second column spring to open the drain hole, so that the medium in the pipeline can be discharged from the drain hole to achieve antifreeze. When the temperature returns to the set temperature, the lower end of the thermistor re-extends and presses the copper core against the connector to close the drain hole.

[0004] However, the above-mentioned new antifreeze valve also has shortcomings: the thermistor is a key component that enables the antifreeze valve to automatically drain water when the temperature drops and automatically close when the temperature rises, but in practice the thrust of the thermistor will gradually decay during long-term use, resulting in poor reliability of the antifreeze valve after long-term use. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes an antifreeze valve to solve the problem that working reliability cannot be guaranteed for a long time.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] An antifreeze valve comprises a valve body with a flow channel arranged in the transverse direction, the lower end of the valve body has a drainage part, the bottom of the drainage part has a drainage hole, and the drainage part has an inner hole connecting the flow channel with the drainage hole, the drainage part is provided with a first support spring, a temperature bag and an elastic sealing assembly from top to bottom, the first support spring, the temperature bag and the elastic sealing assembly abut against each other in sequence, and the temperature bag can control the elastic sealing assembly to open or close the drainage hole, and is characterized in that a positioning piece is fixed in the drainage part, the positioning piece is provided with a through connecting hole along the axial direction of the drainage part, an adjusting head is threadedly connected to the connecting hole, the adjusting head is provided with a through hole along the axial direction of the drainage part, the lower end of the adjusting head is located outside the connecting hole, and the upper end of the first support spring abuts against the lower end of the adjusting head.

[0008] Under normal conditions, the ambient temperature is greater than the set temperature, and the temperature bag is in an expanded state. The lower end of the temperature bag presses against the elastic sealing component to close the drain hole, and the water in the outdoor pipe will not be discharged outward. When the ambient temperature is less than the set temperature, the lower end of the temperature bag shrinks, so that the elastic sealing component will be lifted under its own elastic force to open the drain hole, and the water in the outdoor pipe can be discharged outward through the antifreeze valve. The antifreeze valve is provided with a fixed positioning member in the drainage part, and the positioning member is provided with a through connecting hole along the axial direction of the drainage part. The connecting hole is threadedly connected with an adjusting head, and the upper end of the first support spring is against the lower end of the adjusting head, which means that when the adjusting head is rotated, it will move along the thread and adjust the elastic force of the first support spring. As a result, after the antifreeze valve has been used for a long time, the elastic force of the first support spring acting on the temperature bag can be increased by operating the adjusting head, thereby compensating for the thrust attenuation of the temperature bag after long-term use, ensuring that the antifreeze valve has a high working reliability in long-term use.

[0009] In the above-mentioned antifreeze valve, the outer side of the lower end of the regulating head has an annular abutment portion, and the upper end of the first supporting spring abuts against the annular abutment portion.

[0010] The annular abutment portion can provide a sufficient abutment area for the upper end of the first support spring, thereby ensuring that when the adjusting head moves along the thread, the elastic force of the first support spring acting on the temperature bag can be stably fine-tuned.

[0011] In the above-mentioned antifreeze valve, a guide hole is provided at the bottom of the positioning member, the guide hole is located below the connecting hole and the two are connected, and the upper end of the first support spring is located in the guide hole to form a guide.

[0012] The upper end of the first support spring is located in the guide hole to form a guide, which can ensure that when the elastic force of the first support spring is adjusted, the upper end of the first support spring will not be skewed, ensuring that the elastic force of the first support spring can continue to act on the temperature bag reliably.

[0013] In the above-mentioned antifreeze valve, the upper end of the regulating head extends out of the positioning member, and the upper end of the regulating head is externally threadedly connected with a locking nut.

[0014] After the adjusting head is adjusted into place, the locking nut is threadedly connected to the upper end of the adjusting head. The locking nut can lock the adjusting head so that the adjusting head cannot rotate relative to the positioning member during use.

[0015] In the above-mentioned antifreeze valve, the valve body includes a main body and a connecting pipe. The lower end of the main body has a connecting port. The main body part where the connecting port is located is cylindrical. The drainage part is composed of the main body part where the connecting port is located and the connecting pipe. The upper end of the positioning member is threadedly connected to the connecting port, and the lower end of the positioning member is threadedly connected to the connecting pipe.

[0016] The upper end of the positioning piece is threadedly connected to the connecting port and the lower end of the positioning piece is threadedly connected to the connecting pipe, and the adjusting head is threadedly connected to the connecting hole of the positioning piece. That is to say, the positioning piece has two functions, one function is to connect the main body with the connecting pipe, and the other function is to provide a position for the threaded connection of the adjusting head.

[0017] In the above-mentioned antifreeze valve, the outer middle part of the positioning member has an annular boss, the inner side of the lower port of the connecting port has an annular positioning seat, the annular boss is located in the annular positioning seat and the annular boss abuts against the upper end surface of the connecting pipe, and the outer middle part of the positioning member also has two annular sealing grooves, the annular boss is located between the two annular sealing grooves, and sealing rings are provided in the two annular sealing grooves, one of the sealing rings abuts against the inner wall of the connecting port to form a seal, and the other sealing ring abuts against the inner wall of the connecting pipe to form a seal.

[0018] Compared with the prior art, the antifreeze valve fixes a positioning piece in the drainage part, and the positioning piece is provided with a through connecting hole along the axial direction of the drainage part. An adjusting head is threadedly connected to the connecting hole, and the upper end of the first supporting spring abuts against the lower end of the adjusting head. In this way, after long-term use, the elastic force of the first supporting spring acting on the temperature bag can be increased by operating the adjusting head, thereby compensating for the thrust attenuation of the temperature bag after long-term use, ensuring that the antifreeze valve has high working reliability during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the antifreeze valve.

[0020] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0021] In the figure, 1, valve body; 1a, flow channel; 1b, drainage part; 1b1, drainage hole; 1c, main body; 1c1, connection port; 1c2, annular positioning seat; 1c3, concave cavity; 1c4, water hole; 1c5, installation port; 1c6, air hole; 1d, connecting pipe; 2, first supporting spring; 3, temperature package; 4, elastic sealing component; 4a, sealing head; 4b, first sealing gasket; 4c, second supporting spring; 5, guide Direction ring; 5a, drainage hole; 6, positioning piece; 6a, guide hole; 6b, annular boss; 6c, annular sealing groove; 7, adjusting head; 7a, through hole; 7b, annular abutment; 8, locking nut; 9, sealing ring; 10, check core; 10a, water groove; 11, check spring; 12, O-ring; 13, pressure cover; 13a, air inlet; 14, floating head; 14a, convex edge; 15, second sealing gasket. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 As shown, an antifreeze valve comprises a valve body 1 with a flow channel 1a arranged in a transverse direction, a drainage portion 1b is provided at the lower end of the valve body 1, a drainage hole 1b1 is provided at the bottom of the drainage portion 1b, and the drainage portion 1b has an inner hole connecting the drainage hole 1b1 with the flow channel 1a. A first support spring 2, a temperature package 3 and an elastic sealing component 4 are arranged in the drainage portion 1b from top to bottom, the lower end of the first support spring 2 abuts against the temperature package 3, the lower end of the temperature package 3 abuts against the elastic sealing component 4, and the temperature package 3 can control the elastic sealing component 4 to open or close the drainage hole 1b1. The elastic sealing assembly 4 includes a sealing head 4a, a first sealing gasket 4b fixed at the lower end of the sealing head 4a, and a second supporting spring 4c sleeved outside the sealing head 4a. The outer side of the upper end of the sealing head 4a has an annular shoulder, the upper end of the second supporting spring 4c abuts against the lower end surface of the annular shoulder, and the lower end of the second supporting spring 4c abuts against the inner wall of the inner hole of the drainage part 1b. The elastic force of the second supporting spring 4c is greater than that of the first supporting spring 2. The downward movement of the sealing head 4a can make the first sealing gasket 4b abut against the upper end opening of the drainage hole 1b1 to close it. The upper end of the sealing head 4a has a groove concave downward, and the lower end of the temperature package 3 is inserted into the groove and abuts against the bottom wall of the groove. A guide ring 5 is fixedly connected to the inner hole of the drainage part 1b, and the lower part of the temperature package 3 passes through the central hole of the guide ring 5. The guide ring 5 has a plurality of drainage holes 5a distributed around its central hole.

[0024] Furthermore, if Figure 1 and Figure 2As shown, a positioning member 6 is fixed in the drainage part 1b, and the positioning member 6 is provided with a through connection hole along the axial direction of the drainage part 1b, and an adjusting head 7 is threadedly connected in the connection hole, and a through hole 7a is provided in the axial direction of the drainage part 1b, and the lower end of the adjusting head 7 extends out of the connection hole. The outer side of the lower end of the adjusting head 7 is provided with an annular abutment portion 7b, and the upper end of the first support spring 2 abuts against the lower end surface of the annular abutment portion 7b. A guide hole 6a is provided at the bottom of the positioning member 6, and the guide hole 6a is located below the connection hole and the two are connected. The guide hole 6a and the connection hole are arranged on the same center line, and the upper end of the first support spring 2 is located in the guide hole 6a and forms a guide. The upper end of the adjusting head 7 extends out of the positioning member 6, and the upper end of the adjusting head 7 is externally threadedly connected with a locking nut 8, and the locking nut 8 abuts against the upper end surface of the positioning member 6.

[0025] Under normal conditions, the ambient temperature is greater than the set temperature, and the temperature bag 3 is in an expanded state. With the action of the first support spring 2, the lower end of the temperature bag 3 presses against the sealing head 4a to compress the second support spring 4c and make the first sealing gasket 4b against the upper end opening of the drain hole 1b1, so that the drain hole 1b1 is closed and the water in the outdoor pipe will not be discharged outward. When the ambient temperature drops to the set temperature, the temperature bag 3 will shrink, so that the second support spring 4c will push the sealing head 4a to move upward and open the drain hole 1b1, so that the water in the outdoor pipe can be discharged outward through the drain hole 1b1 to prevent freezing. Among them, the upper end of the first support spring 2 is against the lower end of the adjustment head 7, and the adjustment head 7 is threadedly connected to the connection hole of the positioning member 6 and the positioning member 6 is fixed in the drainage part 1b, that is, by rotating the adjustment head 7, the adjustment head 7 will move up and down relative to the drainage part 1b along the thread, and the ability of the adjustment head 7 to move up and down means that the elastic force of the first support spring 2 acting on the temperature bag 3 can be fine-tuned. After the antifreeze valve has been used for a long time, the elastic force of the first support spring 2 acting on the temperature bag 3 can be increased by operating the adjusting head 7, thereby compensating for the thrust attenuation of the temperature bag 3 after long-term use, ensuring that the antifreeze valve has high working reliability during long-term use.

[0026] In this embodiment, if Figure 1 and Figure 2As shown, the valve body 1 includes a main body 1c and a connecting pipe 1d, the flow channel 1a is arranged in the main body 1c, the lower end of the main body 1c has a connecting port 1c1, the connecting port 1c1 is communicated with the flow channel 1a, the main body 1c part where the connecting port 1c1 is located is cylindrical, the drainage part 1b is composed of the main body 1c part where the connecting port 1c1 is located and the connecting pipe 1d, the upper end of the positioning member 6 is threadedly connected in the connecting port 1c1, and the lower end of the positioning member 6 is threadedly connected in the connecting pipe 1d. The middle outer side of the positioning member 6 has an annular convex shoulder 6b, the inner side of the lower port of the connecting port 1c1 has an annular positioning seat 1c2, the annular convex shoulder 6b is located in the annular positioning seat 1c2 and the annular convex shoulder 6b is against the upper end surface of the connecting pipe 1d. The outer middle part of the positioning member 6 also has two annular sealing grooves 6c, the annular boss 6b is located between the two annular sealing grooves 6c, and sealing rings 9 are provided in the two annular sealing grooves 6c. One of the sealing rings 9 abuts against the inner wall of the connecting port 1c1 to form a seal, and the other sealing ring 9 abuts against the inner wall of the connecting pipe 1d to form a seal.

[0027] like Figure 1 As shown, a concave cavity 1c3 concave upward is provided at the top of the connection port 1c1, and the main body 1c also has a water hole 1c4, which connects the flow channel 1a with the concave cavity 1c3. A check core 10 is inserted into the water hole 1c4, and the lower end of the check core 10 passes through the concave cavity 1c3. A check spring 11 is provided on the outer sleeve of the check core 10, and the upper end of the check spring 11 abuts against the top wall of the concave cavity 1c3, and the lower end of the check spring 11 abuts against the lower end of the check core 10. The lower end of the check core 10 abuts against the upper end of the regulating head 7, and the bottom of the check core 10 has a water groove 10a, which runs through the side of the check core 10. The upper end of the check core 10 is located in the flow channel 1a, and an O-ring 12 is provided on the outer side of the upper end of the check core 10. The inner wall of the water hole 1c4 is a conical surface whose inner diameter gradually decreases from top to bottom, and the outer diameter of the O-ring 12 is between the maximum inner diameter and the minimum inner diameter of the inner wall of the water hole 1c4.

[0028] Under normal conditions, the lower end of the check core 10 abuts against the upper end of the regulating head 7 so that the upper end of the check core 10 is always located above the water hole 1c4, thereby ensuring that the water hole 1c4 is always in an open state. Only when the pipe 1d is removed from the main body 1c together with the positioning member 6, the lower end of the check core 10 loses its abutting position, so that the check core 10 will fall downward under the dual action of its own gravity and the check spring 11, so that the O-ring 12 abuts against the inner wall of the water hole 1c4 and automatically closes the water hole 1c4 to prevent the water in the valve body 1 from leaking outward. It should be noted that in this antifreeze valve, only the elastic force applied by the first support spring 2 to the temperature bag 3 is fine-tuned by the regulating head 7, so there will be no situation where the check core 10 directly closes the water hole 1c4 under the action of the check spring 11 due to excessive downward movement of the regulating head 7.

[0029] Furthermore, if Figure 1 As shown, the upper end of the main body 1c has a mounting port 1c5, and the portion of the main body 1c where the mounting port 1c5 is located is cylindrical. The mounting port 1c5 is arranged on the same center line as the connection port 1c1, and a vacuum prevention mechanism is arranged in the mounting port 1c5. Specifically, the vacuum prevention mechanism includes a gland 13 threadedly connected to the port of the mounting port 1c5, a floating head 14 arranged in the mounting port 1c5, and a second sealing gasket 15 fixed at the lower end of the floating head 14. The gland 13 is provided with an air inlet 13a in the vertical direction, the upper end of the floating head 14 is located in the air inlet 13a, and there is a gap between the outer wall of the floating head 14 and the hole wall of the air inlet 13a. The outer side of the lower end of the floating head 14 has an annular mounting groove, and the second sealing gasket 15 is located in the annular mounting groove. The outer diameter of the second sealing gasket 15 is larger than the aperture of the air inlet 13a. When the floating head 14 moves upward, the second sealing gasket 15 can abut against the surface where the lower end of the air inlet 13a is located. The main body 1c has an air hole 1c6 connecting the mounting port 1c5 with the flow channel 1a. The outer side of the floating head 14 has a convex edge 14a below the annular mounting groove. The floating head 14 moves downward so that the convex edge 14a can abut against the surface where the upper end of the air hole 1c6 is located. The side of the convex edge 14a has a plurality of air notches along the circumferential direction.

[0030] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An antifreeze valve, comprising a valve body (1) with a flow channel (1a) arranged in a transverse direction, the valve body (1) having a drainage portion (1b) at the lower end, the drainage portion (1b) having a drainage hole (1b1) at the bottom, and the drainage portion (1b) having an inner hole connecting the flow channel (1a) with the drainage hole (1b1), the drainage portion (1b) having a first support spring (2), a temperature bag (3) and an elastic sealing component (4) arranged in sequence from top to bottom in the drainage portion (1b), the first support spring (2), the temperature bag (3) and the elastic sealing component (4) abutting against each other in sequence, the temperature bag (3) being able to control the elastic sealing component (4) to open or close the drainage hole (1b1), characterized in that: A positioning member (6) is fixed inside the drainage portion (1b), the positioning member (6) is provided with a through connection hole along the axial direction of the drainage portion (1b), an adjusting head (7) is threadedly connected inside the connection hole, the adjusting head (7) is provided with a through hole (7a) along the axial direction of the drainage portion (1b), the lower end of the adjusting head (7) is located outside the connection hole, and the upper end of the first support spring (2) is in contact with the lower end of the adjusting head (7).

2. An antifreeze valve according to claim 1, characterized in that: The outer side of the lower end of the regulating head (7) is provided with an annular abutment portion (7b), and the upper end of the first supporting spring (2) abuts against the annular abutment portion (7b).

3. An antifreeze valve according to claim 2, characterized in that: A guide hole (6a) is provided at the bottom of the positioning member (6), the guide hole (6a) is located below the connecting hole and the two are connected, and the upper end of the first supporting spring (2) is located in the guide hole (6a) and forms a guide.

4. An antifreeze valve according to claim 1, 2 or 3, characterized in that: The upper end of the adjusting head (7) extends out of the positioning member (6), and the upper end of the adjusting head (7) is externally threadedly connected with a locking nut (8).

5. The antifreeze valve according to claim 1, characterized in that: The valve body (1) comprises a main body (1c) and a connecting pipe (1d); the lower end of the main body (1c) has a connecting port (1c1); the main body (1c) portion where the connecting port (1c1) is located is cylindrical; the drainage portion (1b) is composed of the main body (1c) portion where the connecting port (1c1) is located and the connecting pipe (1d); the upper end of the positioning member (6) is threadedly connected to the connecting port (1c1); and the lower end of the positioning member (6) is threadedly connected to the connecting pipe (1d).

6. An antifreeze valve according to claim 5, characterized in that: The middle outer side of the positioning member (6) has an annular boss (6b), the inner side of the lower end of the connecting port (1c1) has an annular positioning seat (1c2), the annular boss (6b) is located in the annular positioning seat (1c2) and the annular boss (6b) abuts against the upper end surface of the connecting pipe (1d), the middle outer side of the positioning member (6) also has two annular sealing grooves (6c), the annular boss (6b) is located between the two annular sealing grooves (6c), and sealing rings (9) are provided in the two annular sealing grooves (6c), one of the sealing rings (9) abuts against the inner wall of the connecting port (1c1) to form a seal, and the other sealing ring (9) abuts against the inner wall of the connecting pipe (1d) to form a seal.

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