Device for adjusting opening degree of liquid return valve

Abstract

The utility model relates to the technical field of liquid return valves, in particular to a liquid return valve opening degree adjusting device which comprises a valve body, connecting pipes are welded and fixed to the side wall and the bottom end of the valve body respectively, flange plates used for pipeline connection are welded to the ends, away from the valve body, of the two connecting pipes respectively, a valve cover is arranged at the top end of the valve body, and the valve cover is connected with the valve body. An electromagnet is arranged at the bottom end of the valve cover, a spring is fixedly connected to the electromagnet in a sleeving mode, the end, away from the electromagnet, of the spring is fixedly connected to a valve plate in a sleeving mode, and a pressure sensor is fixedly connected to the side wall of the connecting pipe at the bottom end in an inserted mode; the liquid return valve opening degree adjusting device is simple in structure, the height of the valve plate is easy to adjust, and automatic control can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid return valves, in particular to a liquid return valve opening adjustment device. Background Art

[0002] A liquid return valve is a valve that protects the system from being destroyed due to excessive pressure. Once the medium pressure in the system pipeline or device exceeds the set value, it will automatically release the pressure to achieve the purpose of protecting the safety of the equipment.

[0003] The patent with publication number CN110056385B discloses a valve core assembly, including an inlet valve sleeve, a return valve sleeve threadedly connected to the inlet valve sleeve, a pressure rod movably arranged in the return valve sleeve, and a screw sleeve arranged on the return valve sleeve and used to form a threaded connection with the valve body of the reversing valve, the screw sleeve having an external thread and being arranged to be rotatable relative to the return valve sleeve.

[0004] Although the valve core assembly of the device is threadedly connected to the valve body of the reversing valve by arranging a screw sleeve on the liquid return valve sleeve, the liquid inlet valve sleeve will not be loosened from the liquid return valve sleeve due to the existence of friction resistance during disassembly, which improves the reliability of the connection between the liquid return valve sleeve and the liquid inlet valve sleeve and ensures that the valve core assembly can be removed from the valve body as a whole, it cannot achieve the function of automatic adjustment in regulating the valve, and cannot adjust the opening of the valve plate according to the pressure inside the liquid return valve. In view of this, we will propose a liquid return valve opening adjustment device. Utility Model Content

[0005] The utility model aims to provide a liquid return valve opening adjustment device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A liquid return valve opening adjustment device comprises a valve body, a connecting pipe is welded and fixed to the vertical side wall of the valve body, another connecting pipe is welded and fixed to the bottom end of the valve body through a bent pipe, flanges for connecting to an external pipeline are welded to the ends of the two connecting pipes away from the valve body, a valve cover is provided at the top of the valve body, an electromagnet is provided at the bottom end of the valve cover, a spring is sleeved on the outside of the electromagnet, a valve plate is connected to the end of the spring away from the electromagnet, a guide column is connected to the inside of the connecting pipe on the vertical side wall of the valve body by bolts, and the guide column is in contact with the valve plate, and a pressure sensor is fixedly plugged into the side wall of the connecting pipe at the bottom end of the valve body.

[0008] Preferably, the valve body is cylindrical, and the connection points between the valve body and the two connecting pipes are interconnected.

[0009] Preferably, the valve cover is disc-shaped, fixed to the top edge of the valve body by bolts, and a sealing ring is sandwiched between the valve cover and the top surface of the valve body.

[0010] Preferably, the electromagnet is fixedly clamped at the center of the bottom end of the valve cover, and the electromagnet is cylindrical, and the diameter of the electromagnet is equal to the inner diameter of the spring.

[0011] Preferably, the valve plate is composed of a cylinder at the top and a disc at the bottom which are welded and fixed, the diameter of the cylinder at the top of the valve plate is equal to the inner diameter of the spring, and the diameter of the disc at the bottom of the valve plate is equal to the inner diameter of the bottom of the valve body.

[0012] Preferably, the valve plate and the electromagnet do not contact each other when the spring is in an initial state, and the valve plate is made of magnetic material.

[0013] Preferably, when the spring is in an initial state, the distance between the top end of the electromagnet and the bottom end of the valve plate is equal to the height of the valve body.

[0014] Preferably, the pressure sensor and the electromagnet are both electrically connected to an external power source via a wire, and the pressure sensor and the electromagnet are both connected to a PLC via a data line signal.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The opening adjustment device of the return valve can adjust the height of the valve plate through the solenoid valve, and can effectively adjust the opening of the valve plate according to the pressure inside the valve body. It is easy to adjust and does not need to be disassembled;

[0017] 2. The liquid return valve opening adjustment device can detect and adjust the pressure at any time through the installed pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram in the utility model;

[0020] Figure 3 It is a schematic diagram of the main cross-sectional structure in the utility model;

[0021] Figure 4 It is a schematic diagram of the main structure in the utility model.

[0022] In the figure:

[0023] 1. Valve body; 10. Electromagnet; 11. Spring; 12. Valve plate; 13. Guide column;

[0024] 2. Connecting pipe; 20. Flange;

[0025] 3. Valve cover;

[0026] 4. Pressure sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in 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.

[0028] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0029] A liquid return valve opening adjustment device comprises a valve body 1, a connecting pipe 2 is welded and fixed to the vertical side wall of the valve body 1, another connecting pipe 2 is welded and fixed to the bottom end of the valve body 1 through a bend pipe, and a flange 20 for pipeline connection is welded to the ends of the two connecting pipes 2 away from the valve body 1, a valve cover 3 is provided at the top of the valve body 1 to prevent fluid leakage from the valve body 1 when working, and an electromagnet 10 for controlling the extension and contraction of a spring 11 is provided at the bottom end of the valve cover 3, and the electromagnet 10 is fixedly sleeved with a spring 11 for adjusting the height of a valve plate 12, and the end of the spring 11 away from the electromagnet 10 is fixedly sleeved on the bottom of the valve plate 12 The end is made so that the valve plate is not easy to fall off when it is controlled by the spring; the connecting pipe 2 on the vertical side wall of the valve body 1 is connected with a guide column 13 by bolts, and the guide column 13 is in contact with the valve plate 12, wherein an inward sliding groove is opened on the side wall of the guide column 13, and a protrusion matched with the sliding groove is integrally formed on the disc side wall of the valve plate 12. The guide column 13 can fix the sliding track of the valve plate 12 to prevent the valve plate 12 from being displaced during the up and down sliding process; a pressure sensor 4 is fixedly plugged into the side wall of the connecting pipe 2 at the bottom end of the valve body 1 to detect the pressure in the pipeline, so as to adjust the height of the valve plate 12 according to the pressure conditions.

[0030] In this embodiment, the valve body 1 is cylindrical, and the connection points between the valve body 1 and the two connecting pipes 2 are interconnected, so that the entire valve body 1 device can work normally.

[0031] In this embodiment, the valve cover 3 is disc-shaped, which is convenient for installation on the valve cover 3. The valve cover 3 is fixed to the top edge of the valve body 1 by bolts. A sealing ring is sandwiched between the valve cover 3 and the top surface of the valve body 1, so that the valve cover 3 can be easily disassembled and repaired from the valve body 1 and the sealing of the contact surface is maintained.

[0032] In this embodiment, the electromagnet 10 is fixedly connected to the center of the bottom end of the valve cover 3 to prevent the electromagnet 10 from falling off the valve cover 3. The electromagnet 10 is cylindrical, and the diameter of the electromagnet 10 is equal to the inner diameter of the spring 11, which makes it easy to fix the electromagnet 10 and the spring 11.

[0033] In this embodiment, the valve plate 12 is composed of a cylinder at the top and a disc at the bottom that are welded and fixed. The diameter of the cylinder at the top of the valve plate 12 is equal to the inner diameter of the spring 11, which is convenient for fixing the valve plate 12 to the spring 11. The diameter of the disc at the bottom of the valve plate 12 is equal to the inner diameter of the bottom of the valve body 1. The valve plate 12 is combined according to the shape of the valve body 1 so that the valve plate 12 can slide in the valve body 1 without hindrance.

[0034] In this embodiment, the valve plate 12 and the electromagnet 10 do not contact each other when the spring 11 is in the initial state, so as to avoid affecting the normal operation of the valve body 1 . The valve plate 12 is made of magnetic material and can be easily attracted and controlled by the electromagnet 10 .

[0035] In this embodiment, when the spring 11 is in the initial state, the distance between the top end of the electromagnet 10 and the bottom end of the valve plate 12 is equal to the height of the valve body 1, preventing the valve plate 12 from opening during operation, thereby affecting flow control.

[0036] In this embodiment, the pressure sensor 4 and the electromagnet 10 are both electrically connected to an external power supply through wires, and the pressure sensor 4 and the electromagnet 10 are both connected to the PLC through data line signals. The pressure sensor 4 detects the pipeline pressure and transmits the detected pressure data to the PLC. The PLC then controls the magnetism of the electromagnet 10 according to pre-set parameters, thereby controlling the height of the valve plate 12.

[0037] Finally, it should be noted that the electromagnet 10, pressure sensor 4, external PLC controller and other components involved in the utility model are all universal standard parts or components known to technical personnel in this field, and their structures and principles are all known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adaptive controllers and power supplies, are connected through wires. The specific connection means should refer to the working principle of the utility model. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection means are all well-known technologies in the field.

[0038] When the liquid return valve opening adjustment device of the utility model is used, the flange 20 on the connecting pipe 2 is first fixed to the corresponding pipeline by bolts, and after the power of each electronic device is turned on, the valve at the source of the fluid is opened, and the fluid starts to flow from the lower connecting pipe 2. As the fluid continues to accumulate on the valve body 1 of the liquid return valve, the spring 11 is compressed upward by the fluid pressure, and the valve plate 12 is gradually pushed up completely by the fluid. The valve plate 12 finally opens, and the fluid flows into the upper connecting pipe 2. At this time, the magnetism of the electromagnet 10 can be controlled according to the detection of the pipeline pressure by the pressure sensor 4, and then the height of the valve plate 12 can be controlled. At the same time, the PLC can also be set to automatically control the valve plate 12 according to the change of the internal pressure. At the same time, the guide column 13 will prevent the valve plate 12 from deviating from the track.

[0039] The above shows and describes the basic principle, main features and advantages of the present embodiment of the utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiment. The above embodiment and description are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present embodiment may have various changes and improvements, which fall within the scope of the present utility model to be protected. The scope of protection claimed by the present utility model is defined by the attached claims and their equivalents.

Claims

1. A liquid return valve opening adjustment device, comprising a valve body (1), characterized in that: A connecting pipe (2) is welded and fixed to the vertical side wall of the valve body (1); another connecting pipe (2) is welded and fixed to the bottom end of the valve body (1) by means of a bent pipe; a flange (20) for connecting to an external pipeline is welded to one end of each of the two connecting pipes (2) away from the valve body (1); a valve cover (3) is provided at the top end of the valve body (1); an electromagnet (10) is provided at the bottom end of the valve cover (3); a spring (11) is sleeved on the outside of the electromagnet (10); a valve plate (12) is connected to the end of the spring (11) away from the electromagnet (10); a guide column (13) is bolted to the inside of the connecting pipe (2) on the vertical side wall of the valve body (1), and the guide column (13) is in contact with the valve plate (12); a pressure sensor (4) is fixedly plugged into the side wall of the connecting pipe (2) at the bottom end of the valve body (1).

2. The liquid return valve opening adjustment device according to claim 1, characterized in that: The valve body (1) is cylindrical, and two ends of the valve body (1) are respectively connected to the two connecting pipes (2).

3. The liquid return valve opening adjustment device according to claim 1, characterized in that: The valve cover (3) is disc-shaped and is fixed to the top edge of the valve body (1) by means of bolts. A sealing ring is sandwiched between the valve cover (3) and the top surface of the valve body (1).

4. The liquid return valve opening adjustment device according to claim 1, characterized in that: The electromagnet (10) is fixedly clamped at the center of the bottom end of the valve cover (3), and the electromagnet (10) is cylindrical, and the outer diameter of the electromagnet (10) is equal to the inner diameter of the spring (11).

5. The liquid return valve opening adjustment device according to claim 1, characterized in that: The valve plate (12) is composed of a cylinder at the top and a disc at the bottom that are welded and fixed, the inner diameter of the cylinder at the top of the valve plate (12) is equal to the inner diameter of the spring (11), and the outer diameter of the disc at the bottom of the valve plate (12) is equal to the inner diameter of the valve body (1).

6. The liquid return valve opening adjustment device according to claim 1, characterized in that: The valve plate (12) and the electromagnet (10) do not contact each other when the spring (11) is in an initial state, and the valve plate (12) is made of magnetic material.

7. The liquid return valve opening adjustment device according to claim 1, characterized in that: When the spring (11) is in an initial state, the distance between the top end of the electromagnet (10) and the bottom end of the valve plate (12) is equal to the inner height of the valve body (1).

8. The liquid return valve opening adjustment device according to claim 1, characterized in that: The pressure sensor (4) and the electromagnet (10) are respectively electrically connected to an external power source via a wire, and the pressure sensor (4) and the electromagnet (10) are respectively connected to an external PLC controller signal via a data line.

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