Anti-freezing check valve

Abstract

The utility model relates to the technical field of valves, and discloses an anti-freezing check valve which comprises a valve body, a one-way mechanism is arranged in the valve body, an electric tracing band is wound and pasted outside the valve body, a temperature sensor and a PLC are fixedly installed on one side of the valve body, the temperature sensor is electrically connected with the PLC, and the PLC is electrically connected with the one side of the valve body. And the PLC is electrically connected with the electric tracing band. When the temperature sensor detects that the temperature in the valve body 1 is close to or lower than a preset anti-freezing temperature threshold value, a signal can be transmitted to the PLC, the PLC starts the electric heat tracing belt to heat the valve body, and when the temperature rises to a safe range, the PLC stops working of the electric heat tracing belt, so that the valve body is protected against freezing. Therefore, intelligent temperature control is achieved, the anti-freezing effect is guaranteed, and energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field more specifically, the utility model relates to a kind of freeze-proof check valve. BACKGROUND

[0002] Check valve is widely used in industrial production, building water supply and drainage and civil facilities and many other fields, which functions to ensure the one-way flow of fluid in the pipeline, prevent backflow from causing equipment damage, system failure and other problems. However, in cold regions or low-temperature environments, when the ambient temperature is lower than the freezing point of the fluid, the fluid in the pipeline is prone to freezing, which can cause the valve components to expand and be damaged, affecting the normal use of the check valve, and may also cause the pipeline to rupture, leading to serious safety accidents and economic losses. To address this problem, we designed a freeze-proof check valve. SUMMARY

[0003] To overcome the shortcomings of the prior art, the utility model provides a freeze-proof check valve to solve the problems raised in the background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a freeze-proof check valve, comprising a valve body, a one-way mechanism is provided in the valve body, an electric heat tracing band is wrapped and pasted outside the valve body, a temperature sensor and a PLC controller are fixedly installed on one side of the valve body, the temperature sensor and the PLC controller are electrically connected, and the PLC controller is electrically connected with the electric heat tracing band.

[0005] As a preferred technical scheme of the utility model, annular mounting plates are fixedly arranged at both ends of the valve body, and a plurality of mounting holes are formed in the annular mounting plates.

[0006] As a preferred technical scheme of the utility model, a polyurethane foam sleeve is sleeved on one side of the electric heat tracing band, and the polyurethane foam sleeve is pasted on the outer wall of the valve body.

[0007] As a preferred technical scheme of the utility model, the one-way mechanism comprises an inner ring plate and a horizontal plate, the inner ring plate is fixed on one side in the valve body, a baffle is placed on one side of the inner ring plate, a rubber pad is fixed on the side wall of the baffle, the horizontal plate is arranged on one side of the baffle, and telescopic mechanisms are connected between the side walls of the baffle and the horizontal plate on both sides, and plug-in mechanisms are arranged between the side walls of the horizontal plate and the inner wall of the valve body on both sides.

[0008] As a preferred technical scheme of the utility model, the telescopic mechanism comprises a sliding rod and a sliding hole, the sliding hole is formed in the horizontal plate on both sides, the sliding rod is fixed on one side of the baffle side wall, the other end of the sliding rod passes through the sliding hole and is fixed with a rod limiting plate, a spring is sleeved on one side of the sliding rod, one end of the spring is fixed on the side wall of the baffle, and the other end of the spring is fixed on the side wall of the horizontal plate.

[0009] As a preferred technical scheme of the utility model, the inserting mechanism comprises an inserting plate and a side plate, the side plate is fixed to the inner wall of the valve body, and an insertion hole is formed in the side plate, the horizontal plate is placed on one side of the side plate, and the inserting plate is fixed to one side of the horizontal plate and extends outward through the insertion hole.

[0010] Compared with the prior art, the utility model has the beneficial effects as follows:

[0011] 1. The utility model discloses a one-way mechanism can effectively prevent the liquid in the valve body from flowing backward, thereby protecting the equipment.

[0012] 2. The utility model discloses when temperature sensor detects that the temperature in the valve body 1 is close to or lower than the preset antifreezing temperature threshold value, can signal transmission is given to PLC controller, and PLC controller will start electric heat tracing band and heat the valve body, when the temperature rises back to the safety range, PLC controller will stop electric heat tracing band work, and in this way, intelligent temperature control is realized, guaranteeing antifreezing effect and saving energy. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the three-dimensional structure schematic view of the utility model one kind of antifreezing check valve;

[0014] Fig. 2 It is the main view structure schematic view of the utility model one kind of antifreezing check valve;

[0015] Fig. 3 It is the side view structure schematic view of the utility model one kind of antifreezing check valve;

[0016] Fig. 4 It is the system structure schematic view of the utility model one kind of antifreezing check valve.

[0017] In the drawing: 1, valve body;2, annular mounting plate;3, mounting hole;4, PLC controller;5, temperature sensor;6, polyurethane foam sleeve;7, electric heat tracing band;8, inner ring plate;9, baffle;10, rubber pad;11, horizontal plate;12, slide rod;13, spring;14, rod limiting plate;15, side plate;16, inserting plate. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0019] For example, Figs. 1 to 4The utility model provides a kind of anti-freezing check valve, including valve body 1, one-way mechanism is provided in valve body 1, electric heat tracing band 7 is pasted with winding outside valve body 1, temperature sensor 5 and PLC controller 4 are fixedly installed in one side of valve body 1, temperature sensor 5 and PLC controller 4 are electrically connected, the temperature in valve body 1 can be detected by temperature sensor 5, PLC controller 4 and electric heat tracing band 7 are electrically connected, temperature sensor 5, PLC controller 4, electric heat tracing band 7 are connected with power supply, when temperature sensor 5 detects that the temperature in valve body 1 is close to or lower than preset anti-freezing temperature threshold, signal will be transmitted to PLC controller 4, PLC controller 4 will start electric heat tracing band 7 to heat valve body 1, when temperature returns to safe range, temperature sensor 5 will send signal to PLC controller 4 again, PLC controller 4 will stop electric heat tracing band 7 work.

[0020] Wherein, annular mounting plate 2 is fixed at both ends of valve body 1, and a plurality of mounting holes 3 are formed in annular mounting plate 2, and the valve body 1 can be conveniently installed and fixed through the mounting hole 3.

[0021] Wherein, polyurethane foam sleeve 6 is sleeved on one side of electric heat tracing band 7, and the polyurethane foam sleeve 6 is pasted on the outer wall of the valve body 1, and the electric heat tracing band 7 can be heat-insulated by the polyurethane foam sleeve 6, effectively increasing the heating effect of the electric heat tracing band 7.

[0022] Wherein, the one-way mechanism includes inner ring plate 8 and horizontal plate 11, the inner ring plate 8 is fixed on one side in the valve body 1, the baffle 9 is placed on one side of the inner ring plate 8, and the rubber pad 10 is fixed on the side wall of the baffle 9, the horizontal plate 11 is arranged on one side of the baffle 9, and the stretchable mechanism is connected between the side wall of the baffle 9 and the horizontal plate 11 on both sides, and the plug-in mechanism is arranged between the side wall of the baffle 9 and the inner wall of the valve body 1 on both sides of the horizontal plate 11, the baffle 9 can be applied with a force through the stretchable mechanism, the valve body 1 can be closed when the baffle 9 is placed on one side of the inner ring plate 8, and the baffle 9 can be opened when the water flows from one side of the inner ring plate 8, so that the water can flow in the valve body 1, and the water flow can be prevented from flowing back in the valve body 1 when the water flows from one side of the inner ring plate 8.

[0023] The stretchable mechanism includes a sliding rod 12 and a sliding hole, the sliding hole is formed on both sides of the horizontal plate 11, one end of the sliding rod 12 is fixed on the side wall of the baffle 9, the other end of the sliding rod 12 passes through the sliding hole and is fixed with a rod limiting plate 14, the spring 13 is sleeved on one side of the sliding rod 12, one end of the spring 13 is fixed on the side wall of the baffle 9, the other end of the spring 13 is fixed on the side wall of the horizontal plate 11, the spring 13 is in a compressed state, and the baffle 9 can be applied with a force through the spring 13.

[0024] The inserting mechanism comprises the inserting plate 16 and the side plate 15, the side plate 15 is fixed to the inner wall of the valve body 1, the side plate 15 is provided with an inserting hole, the horizontal plate 11 is arranged on one side of the side plate 15, the inserting plate 16 is fixed to one side of the horizontal plate 11, and the side wall of the inserting plate 16 extends outward through the inserting hole, the horizontal plate 11 can be limited through the inserting mechanism, when the spring 13 or the rubber pad 10 needs to be replaced, the horizontal plate 11 needs to be pressed downward to make the inserting plate 16 disengage from the inserting hole, then the horizontal plate 11 is rotated to make both ends of the horizontal plate 11 disengage from the side plate 15, and then the horizontal plate 11 is taken out from the valve body 1, so that the spring 13 or the rubber pad 10 can be replaced.

[0025] The working principle and use process of the utility model: through one-way mechanism can effectively prevent the liquid in the valve body 1 from flowing back, when temperature sensor 5 detects that the temperature in the valve body 1 is close to or lower than the preset antifreeze temperature threshold, will signal transmission to PLC controller 4, PLC controller 4 will start electric heating tape 7 to heat the valve body 1, when the temperature rises to the safety range, temperature sensor 5 will send a signal to PLC controller 4 again, PLC controller 4 will stop electric heating tape 7 work, so as to realize intelligent temperature control, both ensure antifreeze effect, and save energy.

[0026] It should be noted that in this text, such as first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A freeze-proof check valve comprising a valve body (1), characterized in that: The valve body (1) is provided with a one-way mechanism, the valve body (1) is wrapped and pasted with an electric heat tracing band (7), one side of the valve body (1) is fixedly provided with a temperature sensor (5) and a PLC controller (4), the temperature sensor (5) and the PLC controller (4) are electrically connected, and the PLC controller (4) is electrically connected with the electric heat tracing band (7).

2. A freeze-proof check valve according to claim 1, wherein: The valve body (1) is fixed with an annular mounting plate (2) at both ends, and a plurality of mounting holes (3) are formed in the annular mounting plate (2).

3. A freeze-proof check valve according to claim 1, wherein: The electric heat tracing band (7) is sleeved with a polyurethane foam sleeve (6) on one side, and the polyurethane foam sleeve (6) is pasted on the outer wall of the valve body (1).

4. The freeze-proof check valve according to claim 1, wherein: The one-way mechanism comprises an inner ring plate (8) and a horizontal plate (11), the inner ring plate (8) is fixed on one side in the valve body (1), a baffle (9) is placed on one side of the inner ring plate (8), a rubber pad (10) is fixed on the side wall of the baffle (9), the horizontal plate (11) is arranged on one side of the baffle (9), and the side walls on both sides of the baffle (9) are connected with the horizontal plate (11) through the telescopic mechanism, and the horizontal plate (11) is provided with the inserting mechanism between the side walls and the inner wall of the valve body (1).

5. A freeze-proof check valve according to claim 4, wherein: The telescopic mechanism comprises a sliding rod (12) and a sliding hole, the sliding hole is formed in the side walls of the horizontal plate (11), one end of the sliding rod (12) is fixed on the side wall of the baffle (9), the other end of the sliding rod (12) penetrates through the sliding hole and is fixed with a rod limiting plate (14), a spring (13) is sleeved on one side of the sliding rod (12), one end of the spring (13) is fixed on the side wall of the baffle (9), and the other end of the spring (13) is fixed on the side wall of the horizontal plate (11).

6. A freeze-proof check valve according to claim 4, wherein: The inserting mechanism comprises an inserting plate (16) and a side plate (15), the side plate (15) is fixed on the inner wall of the valve body (1), the side plate (15) is provided with an inserting hole, the horizontal plate (11) is placed on one side of the side plate (15), and the inserting plate (16) is fixed on one side of the horizontal plate (11) and extends outward through the inserting hole.

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