Anti-freezing check valve

Abstract

The utility model discloses an anti-freezing check valve, which relates to the technical field of check valves and comprises a valve body, an anti-freezing component is mounted on the valve body and comprises a liquid storage tank, the liquid storage tank is fixedly mounted outside the valve body, and a storage battery is fixedly mounted at the top end of the liquid storage tank. The two sides of the interior of the liquid storage tank are each fixedly provided with three heating rods which are distributed at equal intervals, the two sides of the storage battery are each fixedly connected with three connecting wires which are distributed at equal intervals, the other ends of the connecting wires are fixedly connected with the top ends of the corresponding heating rods, and one side of the liquid storage tank is fixedly provided with a liquid injection nozzle. The anti-freezing assembly is used for carrying out low-temperature protection on the valve body, the performance of the valve body in the low-temperature environment can be effectively improved, the service life of the valve body in the low-temperature environment can be effectively prolonged, the valve fault phenomenon caused by too low air temperature is reduced, meanwhile, due to the existence of the anti-freezing solution, the anti-freezing effect of the check valve can be enhanced in the low-temperature environment, and therefore faults are reduced, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an antifreeze check valve. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The movement of the disc is divided into lift type and swing type. The lift check valve is similar to the stop valve in structure, except that it lacks a valve stem that drives the disc. The medium flows in from the inlet end and flows out from the outlet end. When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. Conversely, the valve is closed when the medium flows back. The swing check valve has a disc that is tilted and can rotate around an axis. Its working principle is similar to that of the lift check valve. The check valve is often used as a bottom valve of a pumping device to prevent water from flowing back.

[0003] Most of the existing check valves do not have antifreeze components, which can easily cause the check valve to malfunction when the temperature is low, thereby affecting the performance and service life of the check valve. In response to the above problems, the inventors propose an antifreeze check valve to solve the above problems. Utility Model Content

[0004] In order to solve the problem that most of the existing check valves do not have antifreeze components and are prone to malfunction in low temperature environments, the purpose of the utility model is to provide an antifreeze check valve.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an antifreeze check valve, comprising a valve body, an antifreeze assembly is installed on the valve body, the antifreeze assembly comprises a liquid storage tank, the liquid storage tank is fixedly installed on the outside of the valve body, a battery is fixedly installed on the top of the liquid storage tank, three equidistantly distributed heating rods are fixedly installed on both sides of the interior of the liquid storage tank, three equidistantly distributed connecting wires are fixedly connected on both sides of the battery, and the other ends of the connecting wires are fixedly connected to the tops of the corresponding heating rods, a liquid injection nozzle is fixedly installed on one side of the liquid storage tank, and the liquid injection nozzle is connected to the inside of the liquid storage tank, and a sealing cover is threadedly installed on the liquid injection nozzle.

[0006] Preferably, the middle part of the valve body is a spherical cavity, a heat-insulating layer is fixedly installed on the outer surface of the spherical cavity in the middle of the valve body, a drain pipe is fixedly installed on the bottom end of the liquid storage tank, and the drain pipe is connected to the inside of the valve body.

[0007] Preferably, a valve flap is hingedly installed in the valve body, and the valve flap can rotate in the spherical cavity of the valve body. A sealing ring is fixedly installed in one end of the valve body, and one side of the valve flap can be sealed and fitted with one side of the sealing ring.

[0008] Preferably, a stopper is fixedly installed in the valve body, and one side of the valve disc is in contact with the bottom end of the stopper. Flanges are fixedly installed at both ends of the valve body, and multiple mounting holes distributed in an annular manner are provided on the two flanges.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. In the utility model, by setting an antifreeze component, when the temperature is low, the antifreeze component is used to protect the valve body from low temperature, which can effectively improve the performance and service life of the valve body in a low temperature environment, and reduce the valve failure phenomenon caused by too low temperature. At the same time, due to the presence of antifreeze liquid, the antifreeze effect of the check valve can be enhanced in an environment with low temperature, thereby reducing the occurrence of failures and facilitating use;

[0011] 2. In the utility model, by providing a drain pipe, when the valve body is closed, the accumulated water in the valve body cavity is discharged through the drain pipe, thereby preventing the accumulated water in the valve body cavity from freezing when the temperature is low, thereby affecting the use of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the liquid storage tank of the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the valve body of the utility model.

[0016] In the figure: 1. valve body; 11. sealing ring; 12. drain pipe; 13. insulation layer; 14. flange; 141. mounting hole; 2. antifreeze assembly; 21. liquid storage tank; 211. liquid filling nozzle; 212. sealing cover; 22. battery; 23. heating rod; 24. connecting wire; 3. valve disc; 4. stopper. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Example: Figure 1-3 As shown, the utility model provides an antifreeze check valve, including a valve body 1, on which an antifreeze assembly 2 is installed, the antifreeze assembly 2 includes a liquid storage tank 21, the liquid storage tank 21 is fixedly installed on the outside of the valve body 1, a battery 22 is fixedly installed on the top of the liquid storage tank 21, three equidistantly distributed heating rods 23 are fixedly installed on both sides of the liquid storage tank 21, three equidistantly distributed connecting wires 24 are fixedly connected on both sides of the battery 22, and the other ends of the connecting wires 24 are fixedly connected to the tops of the corresponding heating rods 23, firstly, antifreeze is injected into the liquid storage tank 21, when the temperature is low, the battery 22 is used to power the heating rods 23 through the connecting wires 24, and the heating rods 23 heat the antifreeze in the liquid storage tank 21, so as to protect the valve body 1 from low temperature, which can effectively improve the performance and service life of the valve body 1 in a low temperature environment, reduce the valve failure phenomenon caused by too low temperature, and at the same time, due to the presence of antifreeze, the antifreeze effect of the check valve can be enhanced in an environment with low temperature, thereby reducing the occurrence of failures and facilitating use.

[0019] A liquid injection nozzle 211 is fixedly installed on one side of the liquid storage tank 21 , and the liquid injection nozzle 211 is communicated with the interior of the liquid storage tank 21 . A sealing cap 212 is threadedly installed on the liquid injection nozzle 211 .

[0020] By adopting the above technical solution, the antifreeze liquid is injected into the liquid storage tank 21 through the liquid injection nozzle 211.

[0021] The middle part of the valve body 1 is a spherical cavity, and a heat-insulating layer 13 is fixedly installed on the outer surface of the spherical cavity in the middle part of the valve body 1 .

[0022] By adopting the above technical solution, the thermal insulation layer 13 on the outer surface of the valve body 1 can enhance the protective effect of the valve body 1.

[0023] A drain pipe 12 is fixedly installed at the bottom end of the liquid storage tank 21 , and the drain pipe 12 is communicated with the interior of the valve body 1 .

[0024] By adopting the above technical solution, when the valve body 1 is closed, the accumulated water in the cavity of the valve body 1 is discharged through the drain pipe 12 to prevent the accumulated water in the cavity of the valve body 1 from freezing when the temperature is low, thereby affecting the use of the valve body 1.

[0025] A valve flap 3 is hingedly mounted in the valve body 1 , and the valve flap 3 can rotate in the spherical cavity of the valve body 1 .

[0026] By adopting the above technical solution, the fluid flows into the valve body 1 from the inlet end and flows out from the outlet end. When the inlet pressure is greater than the sum of the deadweight of the valve disc 3 and its flow resistance, the fluid pushes the valve disc 3 open and the valve is opened.

[0027] A sealing ring 11 is fixedly installed in one end of the valve body 1 , and one side of the valve disc 3 can be sealed and fitted with one side of the sealing ring 11 .

[0028] By adopting the above technical solution, when the fluid flows back, the fluid impacts the valve flap 3 and rotates to close. At this time, the valve flap 3 is sealed and fitted with the sealing ring 11 to prevent the fluid from flowing back.

[0029] A stopper 4 is fixedly installed in the valve body 1 , and one side of the valve disc 3 contacts the bottom end of the stopper 4 .

[0030] By adopting the above technical solution, the fluid flows in from the inlet end of the valve body 1 and flows out from the outlet end. When the inlet pressure is greater than the sum of the deadweight of the valve flap 3 and its flow resistance, the fluid will open the valve flap 3. At this time, the block 4 can block the valve flap 3 to facilitate the closing of the valve flap 3 when the fluid flows back.

[0031] Flanges 14 are fixedly mounted on both ends of the valve body 1 , and a plurality of mounting holes 141 distributed in an annular manner are formed on the two flanges 14 .

[0032] By adopting the above technical solution, the flange 14 and the mounting hole 141 facilitate the butt mounting of the valve body 1 .

[0033] Working principle: When the utility model is in use, the fluid flows in from the inlet end of the valve body 1 and flows out from the outlet end. When the inlet pressure is greater than the sum of the deadweight of the valve disc 3 and its flow resistance, the fluid will push the valve disc 3 open. At this time, the stopper 4 can block the valve disc 3 to facilitate the closing of the valve disc 3 when the fluid flows back. When the fluid flows back, the fluid impacts the valve disc 3 to rotate and close. At this time, the valve disc 3 and the sealing ring 11 are sealed and fitted to prevent the fluid from flowing back. When the valve body 1 is closed, the accumulated water in the cavity of the valve body 1 can be discharged through the drain pipe 12 to prevent the accumulated water in the cavity of the valve body 1 from freezing when the temperature is low, which affects the use of the valve body 1.

[0034] The antifreeze liquid is injected into the liquid storage tank 21 through the liquid injection nozzle 211. When the temperature is low, the battery 22 is used to power the heating rod 23 through the connecting line 24. The heating rod 23 heats the antifreeze liquid in the liquid storage tank 21, thereby protecting the valve body 1 from low temperature. This can effectively improve the performance and service life of the valve body 1 in a low temperature environment and reduce valve failures caused by low temperature. At the same time, due to the presence of antifreeze liquid, the antifreeze effect of the check valve can be enhanced in a low temperature environment, thereby reducing the occurrence of failures and facilitating use. The insulation layer 13 on the outer surface of the valve body 1 can also enhance the protection effect of the valve body 1.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An antifreeze check valve, comprising a valve body (1), characterized in that: An antifreeze component (2) is installed on the valve body (1), and the antifreeze component (2) comprises a liquid storage tank (21), the liquid storage tank (21) is fixedly installed on the outside of the valve body (1), a battery (22) is fixedly installed on the top of the liquid storage tank (21), three heating rods (23) are fixedly installed at equal intervals on both sides of the inside of the liquid storage tank (21), and three connecting wires (24) are fixedly connected to both sides of the battery (22), and the other ends of the connecting wires (24) are fixedly connected to the tops of the corresponding heating rods (23).

2. An antifreeze check valve as claimed in claim 1, characterized in that: A liquid injection nozzle (211) is fixedly mounted on one side of the liquid storage tank (21), and the liquid injection nozzle (211) is in communication with the interior of the liquid storage tank (21), and a sealing cover (212) is threadedly mounted on the liquid injection nozzle (211).

3. An antifreeze check valve as claimed in claim 1, characterized in that: The middle part of the valve body (1) is a spherical cavity, and a thermal insulation layer (13) is fixedly mounted on the outer surface of the spherical cavity in the middle part of the valve body (1).

4. An antifreeze check valve as claimed in claim 1, characterized in that: A drainage pipe (12) is fixedly mounted on the bottom end of the liquid storage tank (21), and the drainage pipe (12) is in communication with the interior of the valve body (1).

5. The antifreeze check valve according to claim 1, characterized in that: A valve flap (3) is hingedly mounted inside the valve body (1), and the valve flap (3) can rotate inside the spherical cavity of the valve body (1).

6. An antifreeze check valve as claimed in claim 1, characterized in that: A sealing ring (11) is fixedly mounted inside one end of the valve body (1), and one side of the valve flap (3) can be sealingly fitted with one side of the sealing ring (11).

7. An antifreeze check valve as claimed in claim 1, characterized in that: A stopper (4) is fixedly mounted inside the valve body (1), and one side of the valve flap (3) is in contact with the bottom end of the stopper (4).

8. An antifreeze check valve as claimed in claim 1, characterized in that: Flanges (14) are fixedly mounted on both ends of the valve body (1), and a plurality of mounting holes (141) distributed in an annular manner are provided on the two flanges (14).

Images