Energy-saving overflow valve with pressure feedback

Abstract

The utility model relates to the technical field of overflow valves, in particular to an energy-saving overflow valve with pressure feedback, which comprises a valve body, one side of the valve body is fixedly connected with a valve cover, one side, far away from the valve cover, of the valve body is fixedly connected with a valve seat, a valve cavity and a pressure cavity are respectively arranged in the valve body, the valve cavity is communicated with the pressure cavity, and a valve core is arranged in the valve cavity. Pressure is directly sensed through the diaphragm and converted into mechanical displacement of the push rod, passive pressure sensing and overflow control are achieved by combining elastic force of the pre-compression pressure adjusting spring and sealing force balance, extra electric control elements are not needed, and therefore the energy consumption of an electromagnet and continuous power supply of the electromagnet is eliminated, the total power consumption of a system is remarkably reduced, and the service life of the system is prolonged. Compared with the prior art, a complex electric signal conversion link is omitted, meanwhile, the effect of millisecond-level quick response is achieved through elastic deformation of the diaphragm, instant pressure impact is effectively restrained, the pre-compression amount can be conveniently adjusted through the adjusting nut, and the energy efficiency, the dynamic response speed, the pressure control precision and the stability of the system are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of overflow valve technology, and in particular to an energy-saving overflow valve with pressure feedback. Background Technology

[0002] As a core component for pressure control in hydraulic systems, the performance of the relief valve directly affects the stability, energy consumption, and safety of the system. The relief valve is an indispensable component in hydraulic systems, not only having the function of high-pressure relief, but also being able to control the maximum torque output of the hydraulic pump.

[0003] In the existing use of relief valves, such as the "Pressure Feedback Direct-Acting Proportional Relief Valve" disclosed in patent publication number CN 201621120 U, the pressure generated at the valve inlet is fed back to the proportional controller via a pressure sensor and compared with the input command signal to determine whether the pressure generated by the thrust of the proportional electromagnet can meet the requirements. However, relying on the proportional electromagnet to provide thrust requires continuous power supply to maintain the pressure. Under high-pressure conditions, the power consumption of the electromagnet can account for 5%-8% of the total system energy consumption. Furthermore, the electrical signal conversion link from the pressure signal to the sensor, controller, and then to the electromagnet has a long response time, which cannot quickly suppress instantaneous pressure shocks. This makes the feedback link more complex, resulting in increased energy loss and failing to meet the requirements of low-energy-consumption and high-precision hydraulic systems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an energy-saving relief valve with pressure feedback.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An energy-saving relief valve with pressure feedback includes a valve body, a valve cover fixedly connected to one side of the valve body, a valve seat fixedly connected to the side of the valve body away from the valve cover, a valve chamber and a pressure chamber respectively opened inside the valve body, the valve chamber and the pressure chamber are connected, a valve core is provided in the valve chamber, one end of the valve core extends into the pressure chamber and is fixedly connected to a diaphragm.

[0007] Guide holes are provided on the lower inner walls of both the valve body and the valve cover. A push rod is installed in the guide hole, and a clearance fit is formed between the push rod and the guide hole. One end of the push rod is fixedly connected to a hemispherical abutment block, and one end of the abutment block is connected and fixed to the diaphragm through a vulcanization process.

[0008] Preferably, the outer surface of the push rod away from the abutment block is provided with a threaded section, and an adjusting nut is provided on one side of the valve body. One end of the adjusting nut is provided with a threaded hole that mates with the threaded section, and the push rod passes through the threaded hole and is connected to the adjusting nut.

[0009] Preferably, the adjusting nut has a placement groove in the middle, and an adjusting rod is provided in the placement groove. The adjusting rod is connected to the valve core through a pressure regulating spring.

[0010] Preferably, the top of the valve body is provided with an oil inlet and an overflow port, both of which are connected to the interior of the valve body. The oil inlet and the overflow port are connected through an internal oil passage, and the bottom of the oil inlet is connected to the pressure chamber.

[0011] Preferably, the outer wall of the diaphragm is provided with an O-ring, the O-ring is filled inside the pressure chamber, and the valve body and the adjusting nut are connected by a locking nut.

[0012] Preferably, the inner walls of both the oil inlet and the overflow outlet are provided with slots, and a metal filter screen is engaged in the slots.

[0013] Preferably, the interior has an overflow channel, and the top of the overflow channel is connected to the overflow port.

[0014] Preferably, the diaphragm is made of nitrile rubber and the push rod is made of stainless steel.

[0015] The beneficial effects of this utility model are:

[0016] By directly sensing pressure through a diaphragm and converting it into mechanical displacement of a push rod, combined with the balance between the elasticity of the pre-compression adjusting spring and the sealing force, passive pressure sensing and overflow control are achieved without the need for additional electronic control components. This eliminates the energy consumption of electromagnets and their continuous power supply, significantly reducing the total power consumption of the system. It also eliminates the need for complex electrical signal conversion links. At the same time, the elastic deformation of the diaphragm achieves a millisecond-level fast response, effectively suppressing instantaneous pressure shocks. The pre-compression amount can be easily adjusted using an adjusting nut, significantly improving the system's energy efficiency, dynamic response speed, pressure control accuracy, and stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an energy-saving relief valve with pressure feedback proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of an energy-saving relief valve with pressure feedback proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the valve core and push rod connection structure of an energy-saving relief valve with pressure feedback proposed in this utility model.

[0020] In the picture:

[0021] 1. Valve body; 2. Valve cover; 3. Valve seat; 4. Pressure chamber; 5. Valve core; 6. Diaphragm; 7. Guide hole; 8. Push rod; 9. Abutment block; 10. Threaded section; 11. Adjusting nut; 12. Threaded hole; 13. Adjusting rod; 14. Pressure regulating spring; 15. Oil inlet; 16. Overflow port; 17. O-ring seal; 18. Locking nut; 19. Metal filter screen; 20. Overflow channel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0024] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0025] Example:

[0026] Reference Figures 1-3 An energy-saving relief valve with pressure feedback includes a valve body 1, a valve cover 2 fixedly connected to one side of the valve body 1, a valve seat 3 fixedly connected to the side of the valve body 1 away from the valve cover 2, a valve chamber and a pressure chamber 4 respectively opened inside the valve body 1, the valve chamber and the pressure chamber 4 are connected, a valve core 5 is provided in the valve chamber, one end of the valve core 5 extends into the pressure chamber 4 and is fixedly connected to a diaphragm 6;

[0027] Both valve body 1 and valve cover 2 have guide holes 7 on their inner walls. A push rod 8 is installed in the guide hole 7. The push rod 8 and the guide hole 7 form a clearance fit. One end of the push rod 8 is fixedly connected to a hemispherical abutment block 9. One end of the abutment block 9 is connected and fixed to the diaphragm 6 through a vulcanization process.

[0028] A threaded section 10 is provided on the outer surface of the end of the push rod 8 away from the abutment block 9. An adjusting nut 11 is provided on one side of the valve body 1. A threaded hole 12 that mates with the threaded section 10 is provided at one end of the adjusting nut 11. The push rod 8 passes through the threaded hole 12 and is connected to the adjusting nut 11.

[0029] The adjusting nut 11 has a placement groove in the middle, and an adjusting rod 13 is placed in the placement groove. The adjusting rod 13 is connected to the valve core 5 through a pressure regulating spring 14.

[0030] The top of the valve body 1 is provided with an oil inlet 15 and an overflow port 16. Both the oil inlet 15 and the overflow port 16 are connected to the interior of the valve body 1. The oil inlet 15 and the overflow port 16 are connected through an internal oil passage. The bottom of the oil inlet 15 is connected to the pressure chamber 4.

[0031] The outer wall of the diaphragm 6 is provided with an O-ring 17, which fills the interior of the pressure chamber 4. The valve body 1 and the adjusting nut 11 are connected by a locking nut 18.

[0032] Both the oil inlet 15 and the overflow port 16 have slots on their inner walls, and a metal filter screen 19 is engaged in the slots.

[0033] An overflow channel 20 is provided inside the valve body 1, and the top of the overflow channel 20 is connected to the overflow port 16.

[0034] The diaphragm 6 is made of nitrile rubber, and the push rod 8 is made of stainless steel.

[0035] In this embodiment, when the system pressure of the valve body 1 is not increased in the initial state, its pressure regulating spring 14 is in a pre-compressed state. At this time, an initial force is applied to the push rod 8 through the adjusting nut 11, so that the valve core 5 is pressed tightly against the valve seat 3. At this time, the overflow channel 20 is closed, and the system oil is in a normal working circulation state. The diaphragm 6 is in a slightly deformed state under the action of the pressure regulating spring 14. Then, when the system pressure increases, the pressurized oil enters the pressure chamber 4 through the oil inlet 15 and acts on the diaphragm 6. After being subjected to pressure, the diaphragm 6 begins to deform. The diaphragm 6 converts the oil pressure in the pressure chamber 4 into the axial force of the push rod 8, which then causes the push rod 8 to move away from the diaphragm 6. At this time, the pressure regulating spring 14 is compressed during the movement of the push rod 8, so that the elastic force of the pressure regulating spring 14 gradually increases.

[0036] Furthermore, when the system pressure gradually reaches the preset opening pressure value, the force generated by the diaphragm 6 pushing the push rod 8 is sufficient to overcome the elastic force of the pressure regulating spring 14 and the sealing force between the valve core 5 and the valve seat 3. At this time, the valve core 5 begins to move away from the valve seat 3, the overflow channel 20 opens, and some oil flows back to the oil tank through the overflow port 16, thereby reducing the system pressure. As the oil overflows, the system pressure begins to gradually decrease. At this time, the pressure on the diaphragm 6 decreases, and under the action of the pressure regulating spring 14, the push rod 8 drives the diaphragm 6 to gradually return to its original shape. The valve core 5 also moves towards the valve seat 3, and the overflow channel 20 gradually decreases. When the system pressure drops to a certain level, the valve core 5 is pressed tightly against the valve seat 3 again. At this time, the overflow channel 20 is closed, and the system pressure is maintained within a certain relatively stable range. When adjusting the opening pressure of valve body 1, rotating the adjusting nut 11 allows the threaded section 10 at one end of the push rod 8 to move within the threaded hole 12, thereby changing the pre-compression of the pressure regulating spring 14. When the pre-compression is increased, the elastic force of the pressure regulating spring 14 increases, requiring a higher system pressure to push the diaphragm 6 and the push rod 8 to open the valve core 5 for overflow, thus increasing the opening pressure of valve body 1. Conversely, decreasing the pre-compression reduces the opening pressure of valve body 1. The elastic deformation of the diaphragm 6 can quickly respond to changes in system pressure, while the pressure regulating spring 14, under the action of the push rod 8, adjusts its elastic force according to pressure changes and balances with the force of the diaphragm 6, ensuring that the valve core 5 can stably remain in the open or closed state under different pressures, thus guaranteeing the pressure feedback accuracy and stability of valve body 1.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy-saving relief valve with pressure feedback, comprising a valve body (1), characterized in that, A valve cover (2) is fixedly connected to one side of the valve body (1), and a valve seat (3) is fixedly connected to the side of the valve body (1) away from the valve cover (2). A valve chamber and a pressure chamber (4) are respectively opened inside the valve body (1). The valve chamber and the pressure chamber (4) are connected. A valve core (5) is provided in the valve chamber. One end of the valve core (5) extends into the pressure chamber (4) and is fixedly connected to a diaphragm (6). The valve body (1) and the valve cover (2) are both provided with guide holes (7) on the lower inner walls. A push rod (8) is provided in the guide hole (7). The push rod (8) and the guide hole (7) form a clearance fit. One end of the push rod (8) is fixedly connected to a hemispherical abutment block (9). One end of the abutment block (9) is connected and fixed to the diaphragm (6) through a vulcanization process.

2. The energy-saving relief valve with pressure feedback according to claim 1, characterized in that, The push rod (8) has a threaded section (10) on its outer surface away from the abutment block (9). An adjusting nut (11) is provided on one side of the valve body (1). One end of the adjusting nut (11) has a threaded hole (12) that matches the threaded section (10). The push rod (8) passes through the threaded hole (12) and is connected to the adjusting nut (11).

3. The energy-saving relief valve with pressure feedback according to claim 2, characterized in that, The adjusting nut (11) has a placement groove in the middle, and an adjusting rod (13) is provided in the placement groove. The adjusting rod (13) is connected to the valve core (5) through a pressure adjusting spring (14).

4. The energy-saving relief valve with pressure feedback according to claim 1, characterized in that, The valve body (1) has an oil inlet (15) and an overflow port (16) on its outer top. The oil inlet (15) and the overflow port (16) are connected to the interior of the valve body (1). The oil inlet (15) and the overflow port (16) are connected through an internal oil passage. The bottom of the oil inlet (15) is connected to the pressure chamber (4).

5. The energy-saving relief valve with pressure feedback according to claim 1, characterized in that, The outer wall of the diaphragm (6) is provided with an O-ring (17), which is filled inside the pressure chamber (4). The valve body (1) and the adjusting nut (11) are connected by a locking nut (18).

6. The energy-saving relief valve with pressure feedback according to claim 4, characterized in that, The inner walls of the oil inlet (15) and the overflow port (16) are provided with slots, and a metal filter screen (19) is engaged in the slots.

7. The energy-saving relief valve with pressure feedback according to claim 4, characterized in that, An overflow channel (20) is provided inside the (1), and the top of the overflow channel (20) is connected to the overflow port (16).

8. The energy-saving relief valve with pressure feedback according to claim 1, characterized in that, The diaphragm (6) is made of nitrile rubber, and the push rod (8) is made of stainless steel.

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