Backflow prevention valve with heating mechanism

Abstract

The utility model discloses an anti-backflow valve with a heating mechanism. The anti-backflow valve comprises a valve body, an input pipe is arranged at the bottom end of the valve body, a sealing plate is installed at the top end of the valve body, a threaded rod penetrates through the interior of the sealing plate, a rotating handle is installed at the top end of the threaded rod, and an output pipe is arranged on one side of the valve body. Through the arrangement of the glass fiber reinforced plastic heat preservation shell, the control box, the heat preservation cotton, the reserved groove, the electric heating wire and the metal sleeve, heating of the valve body and liquid is achieved, the temperature control knob at the top end of the control box can control the heating power of the electric heating wire, the output pipe is heated, the temperature of the liquid in the output pipe is indirectly increased, and the heat preservation effect is good. The glass fiber reinforced plastic heat preservation shell, the heat preservation cotton and the metal sleeve form multi-layer isolation, reduce outward temperature loss, prevent low temperature from reducing liquidity of liquid and ensure normal use in a low-temperature environment, meanwhile, the metal sleeve is arranged on the outer side of the reserved groove in a sleeving mode, the strength defect caused by the reserved groove is overcome, and therefore the valve has the heating function.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-backflow valve with a heating mechanism. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as cutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. They are pressure components used to control the flow of various types of fluids such as air, water, steam and oil. The working principle of valves is mainly based on fluid mechanics and mechanical principles, including two processes of opening and closing. In actual use, affected by seasonal and regional factors, the ambient temperature is low, and the flow rate of most liquids is low under low temperature conditions. The blocking effect of the valve core further reduces the flow rate of the liquid, and even solidification occurs, affecting the normal use of the valve body. Therefore, a backflow prevention valve with a heating mechanism is provided. Utility Model Content

[0003] The purpose of the utility model is to provide an anti-backflow valve with a heating mechanism to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a backflow prevention valve with a heating mechanism, comprising a valve body, an input pipe is arranged at the bottom end of the valve body, a sealing plate is installed at the top end of the valve body, and a threaded rod is passed through the inside of the sealing plate, a turning handle is installed at the top end of the threaded rod, an output pipe is arranged on one side of the valve body, and a reserved groove is arranged on the outside of the output pipe, an electric heating wire is installed inside the reserved groove, a metal sleeve is installed on the outside of the reserved groove, and thermal insulation cotton is arranged on the outside of the metal sleeve, a fiberglass insulation shell is installed on the outside of the thermal insulation cotton, and a control box is installed on the outside of the fiberglass insulation shell.

[0005] Preferably, the electric heating wire is spirally wound around the outside of the output tube, and the electric heating wire is electrically connected to the control box via a wire.

[0006] Preferably, the inner diameter of the metal sleeve is matched with the outer diameter of the output pipe, and a welded integrated structure is formed between the metal sleeve and the output pipe.

[0007] Preferably, a limit sleeve is installed at the bottom end of the threaded rod, a sealing ring is installed at the bottom end of the threaded rod, and the sealing ring is sleeved on the outside of the limit sleeve, a guide column is provided at the bottom end of the limit sleeve, and a rubber valve core is installed at the bottom end of the guide column, and a movable connection is formed between the rubber valve core and the inside of the input pipe.

[0008] Preferably, a retraction groove is provided inside the limiting sleeve, and the inner diameter of the retraction groove is matched with the outer diameter of the guide column, and the guide column runs through the inside of the retraction groove.

[0009] Preferably, a compression spring is arranged on the outer side of the guide column, and the compression spring is arranged between the limiting sleeve and the rubber valve core, and a fixed connection is formed between the bottom end of the compression spring and the rubber valve core.

[0010] Preferably, a sealing assembly is installed on the other side of the valve body, and a rocker is installed on one side of the sealing assembly, an arc rod is installed on one side of the rocker, and an axle rod is installed on one side of the arc rod, a connecting column is provided on the outer side of the axle rod, and one end of the connecting column is fixedly connected to the metal scraper.

[0011] Preferably, five groups of the metal scrapers are provided, and the metal scrapers are distributed in a ring shape on the outer side of the shaft, and the metal scrapers are in contact with the inner wall of the output pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The heating of the valve body and the liquid is achieved by providing a glass fiber reinforced plastic insulation shell, a control box, insulation cotton, a reserved groove, an electric heating wire and a metal sleeve. The temperature control knob on the top of the control box can control the heating power of the electric heating wire to heat the output pipe, thereby indirectly increasing the temperature of the liquid inside the output pipe. The glass fiber reinforced plastic insulation shell, insulation cotton and metal sleeve form a multi-layer isolation to reduce the temperature loss to the outside, prevent low temperature from reducing the fluidity of the liquid, and ensure normal use in a low temperature environment. At the same time, the metal sleeve is arranged on the outside of the reserved groove to make up for the strength defect caused by the reserved groove, so that the valve has a heating function;

[0014] (2) The backflow prevention effect is achieved by providing a rubber valve core, a limit sleeve, a sealing ring, a compression spring, a guide column and a retraction groove. The rotation of the threaded rod can control the limit sleeve to move vertically inside the valve body, and the limit sleeve cooperates with the guide column to limit the movement direction of the rubber valve core and adjust the movement range of the rubber valve core. The threaded rod moves up to the top, and the valve is in the opening device. Liquid enters from the inside of the input pipe. The liquid pressure will push the rubber valve core to compress the compression spring, open the flow channel, and flow into the inside of the output pipe. When backflow occurs, the liquid pressure decreases, and the elasticity of the compression spring will push the rubber valve core to move downward, cooperate with the backflowing liquid, so that the rubber valve core is blocked inside the input pipe, and the valve is in a closed state. A single valve core is used to achieve the switching and backflow prevention effects, simplifying the valve body structure.

[0015] (3) The descaling effect is achieved by providing a sealing assembly, a rocker, an arc rod, an axle rod, a connecting column and a metal scraper. The rocker can drive the arc rod and the axle rod to flip to a certain extent, and cooperate with the distribution of multiple sets of metal scrapers to clean the inner wall of the output pipe and scrape off the scale attached to the inner wall of the output pipe, so that the valve has a descaling function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 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.

[0017] Figure 1 This is a front view structural schematic diagram of the utility model;

[0018] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the utility model in a front view;

[0021] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the arc rod of the utility model when viewed from above.

[0022] Description of reference numerals in the figures:

[0023] 1. Valve body; 2. Input pipe; 3. FRP insulation shell; 4. Output pipe; 5. Control box; 6. Sealing plate; 7. Threaded rod; 8. Turn handle; 9. Sealing assembly; 10. Rocker; 11. Rubber valve core; 12. Insulation cotton; 13. Reserved groove; 14. Electric heating wire; 15. Metal sleeve; 16. Limit sleeve; 17. Sealing ring; 18. Compression spring; 19. Guide column; 20. Retraction groove; 21. Arc rod; 22. Shaft rod; 23. Connecting column; 24. Metal scraper. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of 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.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1-5 The utility model provides an embodiment: a backflow prevention valve with a heating mechanism, comprising a valve body 1, an input pipe 2 is arranged at the bottom end of the valve body 1, a sealing plate 6 is installed at the top end of the valve body 1, and a threaded rod 7 is passed through the inside of the sealing plate 6, a handle 8 is installed at the top end of the threaded rod 7, an output pipe 4 is arranged on one side of the valve body 1, and a reserved groove 13 is arranged on the outside of the output pipe 4, an electric heating wire 14 is installed inside the reserved groove 13, a metal sleeve 15 is installed on the outside of the reserved groove 13, and the outside of the metal sleeve 15 A heat preservation cotton 12 is provided, a glass fiber reinforced plastic heat preservation shell 3 is installed on the outside of the heat preservation cotton 12, and a control box 5 is installed on the outside of the glass fiber reinforced plastic heat preservation shell 3, an electric heating wire 14 is spirally wound on the outside of the output pipe 4, and an electrical connection is formed between the electric heating wire 14 and the control box 5 through a wire, the inner diameter of the metal sleeve 15 is adapted to the outer diameter of the output pipe 4, and a welded integrated structure is formed between the metal sleeve 15 and the output pipe 4, and the metal sleeve 15 is sleeved on the outside of the reserved groove 13, which makes up for the strength defect caused by the reserved groove 13;

[0027] Specifically, as shown in the figure, when in use, the heating power of the electric heating wire 14 can be controlled by the temperature control knob at the top of the control box 5 to heat the output tube 4, thereby indirectly increasing the temperature of the liquid inside the output tube 4, and the glass fiber reinforced plastic insulation shell 3, the insulation cotton 12 and the metal sleeve 15 form a multi-layer isolation to reduce the temperature loss to the outside, prevent the low temperature from reducing the fluidity of the liquid, and ensure normal use in a low temperature environment;

[0028] A limiting sleeve 16 is installed at the bottom end of the threaded rod 7, a sealing ring 17 is installed at the bottom end of the threaded rod 7, and the sealing ring 17 is sleeved on the outside of the limiting sleeve 16, a guide column 19 is provided at the bottom end of the limiting sleeve 16, and a rubber valve core 11 is installed at the bottom end of the guide column 19, and a movable connection is formed between the rubber valve core 11 and the inside of the input pipe 2, a retraction groove 20 is provided inside the limiting sleeve 16, and the inner diameter of the retraction groove 20 is matched with the outer diameter of the guide column 19, and the guide column 19 runs through the inside of the retraction groove 20, a compression spring 18 is provided on the outside of the guide column 19, and the compression spring 18 is provided between the limiting sleeve 16 and the rubber valve core 11, and a fixed connection is formed between the bottom end of the compression spring 18 and the rubber valve core 11, the rotation of the threaded rod 7 can control the limiting sleeve 16 to move vertically inside the valve body 1, and the cooperation between the limiting sleeve 16 and the guide column 19 limits the movable direction of the rubber valve core 11 and adjusts the movable range of the rubber valve core 11;

[0029] Specifically, as shown in the figure, when backflow occurs, the liquid pressure decreases, and the elasticity of the compression spring 18 pushes the rubber valve core 11 to move downward, and cooperates with the backflowing liquid to block the rubber valve core 11 inside the input pipe 2, and the valve is in a closed state. A valve core is used to achieve the switching and anti-backflow effects;

[0030] A sealing assembly 9 is installed on the other side of the valve body 1, and a rocker 10 is installed on one side of the sealing assembly 9, an arc rod 21 is installed on one side of the rocker 10, and a shaft rod 22 is installed on one side of the arc rod 21, a connecting column 23 is arranged on the outside of the shaft rod 22, and one end of the connecting column 23 is fixedly connected to a metal scraper 24, five groups of metal scrapers 24 are arranged, and the metal scrapers 24 are distributed in a ring shape on the outside of the shaft rod 22, and the metal scrapers 24 are in contact with the inner wall of the output pipe 4, and the circular motion of the metal scrapers 24 can scrape the inner wall of the output pipe 4 to remove impurities;

[0031] Specifically, as shown in the figure, when in use, the rocker 10 can drive the arc rod 21 and the shaft rod 22 to flip to a certain extent, and cooperate with the distribution of multiple groups of metal scrapers 24 to clean the inner wall of the output pipe 4 and scrape off the scale attached to the inner wall of the output pipe 4.

[0032] Working principle: When in use, first, carry the anti-backflow valve with heating mechanism to the target area, connect it to the corresponding pipeline, and connect the control box 5 to the external power supply. When the heating function needs to be turned on, control the temperature control knob on the top of the control box 5 to adjust the heating power of the electric heating wire 14 to heat the output pipe 4, thereby indirectly increasing the liquid temperature inside the output pipe 4. The fiberglass insulation shell 3, insulation cotton 12 and metal sleeve 15 form a multi-layer isolation to reduce the temperature from leaking outwards and prevent low temperature from reducing the fluidity of the liquid. Subsequently, the threaded rod 7 moves up to the top, the valve is in the open position, and the liquid enters from the inside of the input pipe 2. The liquid pressure pushes the rubber valve The core 11 compresses the compression spring 18, opens the flow channel, and flows into the interior of the output pipe 4. When backflow occurs, the liquid pressure decreases, and the elasticity of the compression spring 18 pushes the rubber valve core 11 to move downward, and cooperates with the backflowing liquid to make the rubber valve core 11 blocked inside the input pipe 2. The valve is in a closed state to prevent liquid backflow. Then, when it is necessary to clean the scale on the inner wall of the output pipe 4, rotate the rocker 10 to drive the arc rod 21 and the shaft rod 22 to flip a certain amplitude, cooperate with the distribution of multiple groups of metal scrapers 24, clean the inner wall of the output pipe 4, scrape off the scale attached to the inner wall of the output pipe 4, and finally complete the use of the anti-backflow valve.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A backflow prevention valve with a heating mechanism, comprising a valve body (1), characterized in that: An input pipe (2) is arranged at the bottom end of the valve body (1), a sealing plate (6) is installed at the top end of the valve body (1), a threaded rod (7) is passed through the interior of the sealing plate (6), a rotating handle (8) is installed at the top end of the threaded rod (7), an output pipe (4) is arranged at one side of the valve body (1), a reserved groove (13) is arranged at the outer side of the output pipe (4), an electric heating wire (14) is installed at the interior of the reserved groove (13), a metal sleeve (15) is installed at the outer side of the reserved groove (13), and a heat insulation cotton (12) is arranged at the outer side of the metal sleeve (15), a glass fiber reinforced plastic heat insulation shell (3) is installed at the outer side of the heat insulation cotton (12), and a control box (5) is installed at the outer side of the glass fiber reinforced plastic heat insulation shell (3).

2. The backflow prevention valve with a heating mechanism according to claim 1, characterized in that: The electric heating wire (14) is spirally wound around the outer side of the output tube (4), and the electric heating wire (14) is electrically connected to the control box (5) via a wire.

3. The backflow prevention valve with a heating mechanism according to claim 1, characterized in that: The inner diameter of the metal sleeve (15) is matched to the outer diameter of the output pipe (4), and a welded integrated structure is formed between the metal sleeve (15) and the output pipe (4).

4. The backflow prevention valve with a heating mechanism according to claim 1, characterized in that: A limiting sleeve (16) is installed at the bottom end of the threaded rod (7), a sealing ring (17) is installed at the bottom end of the threaded rod (7), and the sealing ring (17) is sleeved on the outside of the limiting sleeve (16), a guide column (19) is provided at the bottom end of the limiting sleeve (16), and a rubber valve core (11) is installed at the bottom end of the guide column (19), and a movable connection is formed between the rubber valve core (11) and the inside of the input pipe (2).

5. The backflow prevention valve with a heating mechanism according to claim 4, characterized in that: A retraction groove (20) is arranged inside the limiting sleeve (16), and the inner diameter of the retraction groove (20) is matched with the outer diameter of the guide column (19), and the guide column (19) runs through the inside of the retraction groove (20).

6. The backflow prevention valve with a heating mechanism according to claim 4, characterized in that: A compression spring (18) is arranged on the outer side of the guide column (19), and the compression spring (18) is arranged between the limiting sleeve (16) and the rubber valve core (11), and a fixed connection is formed between the bottom end of the compression spring (18) and the rubber valve core (11).

7. The backflow prevention valve with a heating mechanism according to claim 1, characterized in that: A sealing assembly (9) is installed on the other side of the valve body (1), and a rocker (10) is installed on one side of the sealing assembly (9), an arc rod (21) is installed on one side of the rocker (10), and an axle rod (22) is installed on one side of the arc rod (21), a connecting column (23) is arranged on the outer side of the axle rod (22), and one end of the connecting column (23) is fixedly connected to a metal scraper (24).

8. The backflow prevention valve with a heating mechanism according to claim 7, characterized in that: Five groups of metal scrapers (24) are provided, and the metal scrapers (24) are distributed in a ring shape on the outer side of the shaft (22), and the metal scrapers (24) are in contact with the inner wall of the output pipe (4).

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