An energy recovery device for a furnace hydraulic system

Abstract

The utility model discloses a kind of energy recovery devices for heating furnace hydraulic system, including energy recovery device main body, air bag, oil inlet and hydraulic oil inlet pipe, the bottom end of energy recovery device main body inside is provided with oil inlet, and the bottom end of the oil inlet is provided with filter box, the bottom end of the filter box is provided with hydraulic oil inlet pipe, the central position of the filter box inside is provided with plate filter screen, the bottom end of the one side of filter box is provided with differential pressure sensor, and first detection end and second detection end are respectively connected on the differential pressure sensor through wire, and first detection end and second detection end are respectively arranged in the oil inlet side and oil outlet side of plate filter screen. The utility model is equipped with energy recovery device main body, oil inlet, filter box, hydraulic oil inlet pipe, prevent impurities from entering energy recovery device main body, reduce internal component wear, and can understand the plugging condition of plate filter screen in real time.

Description

Technical Field

[0001] This utility model relates to the field of energy recovery device technology, specifically an energy recovery device for a hydraulic system of a heating furnace. Background Technology

[0002] In modern industrial production, heating furnaces are key equipment widely used in metal heat treatment, preheating before rolling, and other processes. Their hydraulic systems are responsible for driving important actuators such as walking beams to achieve precise material conveying and positioning. However, the descent of the walking beam usually relies on the throttling speed control circuit of a proportional valve. When the walking beam descends, the gravitational potential energy of the load is almost entirely converted into heat energy through this throttling speed control circuit. This energy is not recovered, which easily leads to energy waste. Moreover, this heat is absorbed by the oil and carried into the oil tank, causing the oil temperature to rise continuously. This requires a large cooler and the main body of the oil tank energy recovery device for heat dissipation, resulting in huge electricity consumption throughout the production process.

[0003] To reduce energy consumption in the hydraulic system of a heating furnace, energy recovery devices are generally used. When an actuator (such as a hydraulic cylinder) retracts rapidly or the load suddenly decreases, the pressure energy of the hydraulic oil will increase instantaneously. The energy recovery device can store this excess pressure energy at this time. When the system needs it, the stored energy can be released to provide auxiliary power to the system, thereby realizing energy recovery and reuse, improving system efficiency and reducing energy consumption. However, the oil in the hydraulic system inevitably contains some impurities, such as metal shavings, dust, and sludge. General energy recovery devices do not have a filtration function, and these impurities will enter the energy recovery device with the oil, affecting the internal parts. Utility Model Content

[0004] The purpose of this invention is to provide an energy recovery device for a hydraulic system of a heating furnace, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy recovery device for a hydraulic system of a heating furnace, comprising an energy recovery device body, an air bladder, an oil inlet, and a hydraulic oil inlet pipe. The bottom of the energy recovery device body is provided with an oil inlet, and a filter box is provided at the bottom of the oil inlet. A hydraulic oil inlet pipe is provided at the bottom of the filter box. A plate filter screen is provided at the center of the filter box. An air bladder is provided at the center of the energy recovery device body, and an inflation valve is provided at the center of the top of the energy recovery device body. A hydraulic oil outlet pipe is provided at the bottom of one side of the energy recovery device body, and a solenoid valve is provided on the hydraulic oil outlet pipe. A differential pressure sensor is provided at the bottom of one side of the filter box, and a first detection end and a second detection end are connected to the differential pressure sensor via wires. The first detection end and the second detection end are respectively located on the oil inlet side and the oil outlet side of the plate filter screen.

[0006] Preferably, a fungal valve is provided at the center of the oil inlet via a bracket, and a spring sleeve is provided on the outside of the fungal valve.

[0007] Preferably, a filter element is provided at the center of the plate filter screen, and reinforcing plates are evenly provided on the plate filter screen outside the filter element.

[0008] Preferably, the plate filter screen is provided with inserts on both sides, and the filter box is provided with slots that match the inserts on both sides.

[0009] Preferably, the main body of the energy recovery device is a shell structure, and the main body of the energy recovery device is made of high-strength alloy steel.

[0010] Preferably, the outer side of the main body of the energy recovery device is provided with two sets of outer hoop rings, and each outer hoop ring is provided with a fixing ring around its perimeter, with a support rod passing through each fixing ring.

[0011] Preferably, the outer hoop ring is provided with buffer pads evenly distributed on the side near the main body of the energy recovery device, and the buffer pads are all made of rubber.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The energy recovery device for the hydraulic system of the heating furnace is equipped with an energy recovery device body, an oil inlet, a filter box, and a hydraulic oil inlet pipe. The hydraulic oil inlet pipe is connected to the oil outlet of the hydraulic pump that controls the walking beam of the heating furnace. When the pressure in the hydraulic system increases, the excess hydraulic oil enters the filter box through the hydraulic oil inlet. Impurities in the hydraulic oil are intercepted and filtered by the plate filter screen. Then, it enters the energy recovery device body through the oil inlet to prevent impurities from entering the energy recovery device body and reduce the wear of internal components. At the same time, by setting a differential pressure sensor, a first detection end, and a second detection end, which are respectively set on the oil inlet side and the oil outlet side of the plate filter screen, the differential pressure between the inlet side and the outlet side of the plate filter screen can be monitored in real time. The clogging status of the plate filter screen can be understood in real time. When the differential pressure changes abnormally, the plate filter screen can be replaced in time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a frontal cross-sectional view of the present invention.

[0015] Figure 2 This is a schematic cross-sectional view of the filter box structure of this utility model;

[0016] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This is a schematic diagram of the plate filter structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the outer hoop structure of this utility model.

[0019] In the diagram: 1. Main body of the energy recovery device; 2. Airbag; 3. Inflation valve; 4. Mushroom valve; 5. Spring sleeve; 6. Oil inlet; 7. Filter box; 8. Hydraulic oil inlet pipe; 9. Hydraulic oil outlet pipe; 10. Solenoid valve; 11. Outer clamp ring; 12. Support rod; 13. Differential pressure sensor; 14. Plate filter screen; 15. First detection end; 16. Second detection end; 17. Insert block; 18. Slot; 19. Filter element; 20. Reinforcing plate; 21. Buffer pad; 22. Fixing ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1-5 An embodiment of this utility model is provided: an energy recovery device for a hydraulic system of a heating furnace, including an energy recovery device body 1, an air bag 2, an oil inlet 6 and a hydraulic oil inlet pipe 8. The bottom of the energy recovery device body 1 is provided with an oil inlet 6, and the bottom of the oil inlet 6 is provided with a filter box 7. A plate filter screen 14 is provided in the center of the filter box 7, and the bottom of the filter box 7 is provided with a hydraulic oil inlet pipe 8.

[0022] Connect the hydraulic oil inlet pipe 8 at the bottom of the main body 1 of the energy recovery device to the oil outlet of the hydraulic pump that controls the walking beam of the heating furnace.

[0023] An airbag 2 is provided in the center of the main body 1 of the energy recovery device, and an inflation valve 3 is provided in the center of the top of the main body 1 of the energy recovery device. Nitrogen gas is injected into the airbag 2 through the inflation valve 3.

[0024] The hydraulic pump that controls the walking beam of the heating furnace is working. When the pressure in the hydraulic system increases, the excess hydraulic oil flows into the filter box 7 through the hydraulic oil inlet pipe 8. Impurities are intercepted and filtered through the plate filter screen 14 to prevent impurities from entering the main body 1 of the energy recovery device and reduce the wear of internal components.

[0025] A filter element 19 is provided at the center of the plate filter screen 14, and reinforcing plates 20 are evenly provided on the plate filter screen 14 outside the filter element 19.

[0026] The filter element 19 plays the main filtering role, and the outer reinforcing plate 20 enhances the structural strength of the plate filter screen 14, ensuring its filtering effect and service life.

[0027] A fungal valve 4 is installed in the center of the oil inlet 6 via a bracket, and a spring sleeve 5 is fitted on the outside of the fungal valve 4. The two ends of the spring sleeve 5 are connected to the bracket and the fungal valve 4 respectively, so that the fungal valve 4 can move up and down inside the bracket under the action of the spring sleeve 5.

[0028] Filtered hydraulic oil enters the main body 1 of the energy recovery device through the oil inlet 6. The pressure of the hydraulic oil pushes the mushroom-shaped valve 4 in the center of the oil inlet 6 to move upward, and the spring sleeve 5 is stretched. The hydraulic oil flows into the nitrogen in the compressed air bag 2, which reduces the gas volume and increases the pressure to store energy. The mushroom-shaped valve 4 acts as a one-way valve to prevent the hydraulic oil from flowing back.

[0029] A hydraulic oil outlet pipe 9 is provided at the bottom of one side of the main body 1 of the energy recovery device, and a solenoid valve 10 is provided on the hydraulic oil outlet pipe 9.

[0030] When the system pressure decreases, the nitrogen gas in the airbag 2 expands and releases the energy of the hydraulic oil. When the hydraulic system needs to be replenished with oil, the hydraulic oil in the main body 1 of the energy recovery device flows out through the hydraulic oil outlet pipe 9 and replenishes the hydraulic system to meet the system's flow and pressure requirements.

[0031] By converting the stored elastic potential energy into the pressure energy and kinetic energy of the hydraulic oil and releasing it into the hydraulic system, energy recovery and reuse are achieved. The solenoid valve 10 controls the flow of hydraulic oil and opens or closes according to system requirements.

[0032] A differential pressure sensor 13 is provided at the bottom of one side of the filter box 7, and a first detection end 15 and a second detection end 16 are respectively connected to the differential pressure sensor 13 by wires. The first detection end 15 and the second detection end 16 are respectively located on the oil inlet side and the oil outlet side of the plate filter screen 14.

[0033] The pressure difference between the inlet and outlet sides of the plate filter screen 14 is monitored in real time. Based on the changes in the pressure difference, the clogging status of the plate filter screen 14 can be understood in real time. When the pressure difference reaches a certain abnormal value, it prompts that the plate filter screen 14 needs to be replaced in time.

[0034] The plate filter screen 14 is provided with insert blocks 17 on both sides, and slots 18 matching the insert blocks 17 are provided on both sides inside the filter box 7. The plate filter screen 14 can be quickly replaced by pulling out the insert blocks 17 on both sides of the plate filter screen 14 from the slots 18 inside the filter box 7.

[0035] The main body 1 of the energy recovery device is a shell structure, and the main body 1 of the energy recovery device is made of high-strength alloy steel, which reduces the weight and greatly improves the pressure resistance of the main body 1 of the energy recovery device.

[0036] Two sets of outer hoop rings 11 are provided on the outside of the main body 1 of the energy recovery device to apply a uniform radial constraint force to the main body 1 of the energy recovery device, preventing the internal liquid pressure from expanding outward, thereby improving the pressure resistance of the main body of the device.

[0037] The outer hoop 11 is surrounded by fixing rings 22, and support rods 12 pass through each fixing ring 22. The support rods 12 pass through the fixing rings 22 to form a spatial support frame, which distributes the external force on the main body 1 of the energy recovery device to each support rod 12, so as to avoid excessive local stress.

[0038] The outer hoop ring 11 is evenly provided with buffer pads 21 on the side close to the main body 1 of the energy recovery device. The buffer pads 21 are all made of rubber material. The buffer pads 21 have a certain degree of flexibility and compressibility, which can provide a certain buffer space when the main body 1 of the energy recovery device expands or contracts, and are not prone to excessive stress on the main body 1 of the energy recovery device due to thermal expansion and contraction.

[0039] The specific models and specifications of the inflation valve 3, the fungal valve 4, the differential pressure sensor 13, and the solenoid valve 10 need to be determined based on the specifications and parameters of the device. The selection and calculation method is existing technology, so it will not be described in detail here.

[0040] Working Principle: In this embodiment, the hydraulic oil inlet pipe 8 at the bottom of the energy recovery device body 1 is connected to the oil outlet of the hydraulic pump controlling the walking beam of the heating furnace. Nitrogen is injected into the air bladder 2 through the inflation valve 3. Then, the hydraulic pump controlling the walking beam of the heating furnace operates. When the pressure in the hydraulic system increases, excess hydraulic oil flows into the filter box 7 through the hydraulic oil inlet pipe 8. Impurities are intercepted and filtered through the plate filter screen 14. The filter element 19 in the center of the plate filter screen 14 plays the main filtering role. The outer reinforcing plate 20 enhances the structural strength of the plate filter screen 14, ensuring its filtering effect and service life. The filtered hydraulic oil enters the energy recovery device body 1 through the oil inlet 6. The pressure of the hydraulic oil pushes the mushroom-shaped valve 4 in the center of the oil inlet 6 upward, stretching the spring sleeve 5. The flow of hydraulic oil compresses the nitrogen in the air bladder 2, reducing the gas volume and increasing the pressure, storing energy. The mushroom-shaped valve 4 acts as a one-way valve to prevent hydraulic oil backflow. When the system pressure decreases, the nitrogen in the air bladder 2 expands, releasing the hydraulic pressure. When the hydraulic system needs to replenish oil, the hydraulic oil in the main body 1 of the energy recovery device flows out through the hydraulic oil outlet pipe 9 to replenish the hydraulic system, thereby meeting the system's flow and pressure requirements. By converting the stored elastic potential energy into the pressure energy and kinetic energy of the hydraulic oil and releasing it into the hydraulic system, energy recovery and reuse are achieved. The solenoid valve 10 on the hydraulic oil outlet pipe 9 controls the flow of hydraulic oil and opens or closes according to system requirements. In addition, the differential pressure sensor 13 at the bottom of one side of the filter box 7 is connected to the first detection end 15 and the second detection end 16 through wires and is respectively set on the oil inlet side and oil outlet side of the plate filter screen 14. It monitors the pressure difference between the inlet side and the outlet side of the plate filter screen 14 in real time. Based on the change of pressure difference, the blockage status of the plate filter screen 14 can be understood in real time. When the pressure difference reaches a certain abnormal value, it prompts that the plate filter screen 14 needs to be replaced in time. At this time, the plate filter screen 14 can be quickly replaced by pulling out the inserts 17 on both sides of the plate filter screen 14 from the slots 18 inside the filter box 7.

[0041] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0044] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy recovery device for a furnace hydraulic system, characterized by, The energy recovery device body (1) includes an air bag (2), an oil inlet (6), and a hydraulic oil inlet pipe (8), the bottom of the energy recovery device body (1) is provided with an oil inlet (6), and the bottom of the oil inlet (6) is provided with a filter box (7), the bottom of the filter box (7) is provided with a hydraulic oil inlet pipe (8), the central position of the inside of the filter box (7) is provided with a plate filter screen (14), the central position of the inside of the energy recovery device body (1) is provided with an air bag (2), and the central position of the top of the energy recovery device body (1) is provided with an inflation valve (3), the bottom of one side of the energy recovery device body (1) is provided with a hydraulic oil outlet pipe (9), and the hydraulic oil outlet pipe (9) is provided with a solenoid valve (10), the bottom of one side of the filter box (7) is provided with a differential pressure sensor (13), and the differential pressure sensor (13) is respectively connected with a first detection end (15) and a second detection end (16) through wires, and the first detection end (15) and the second detection end (16) are respectively arranged on the oil inlet side and the oil outlet side of the plate filter screen (14).

2. The energy recovery device for a furnace hydraulic system according to claim 1, characterized in that: The central position of the oil inlet (6) is provided with a bacteria type valve (4) through a support, and the outer side of the bacteria type valve (4) is sleeved with a spring sleeve (5).

3. The energy recovery device for a furnace hydraulic system according to claim 1, characterized in that: The central position of the plate filter screen (14) is provided with a filter core (19), and the plate filter screen (14) outside the filter core (19) is uniformly provided with a reinforcing plate (20).

4. The energy recovery device for a furnace hydraulic system of claim 1, wherein: Both sides of the plate filter screen (14) are provided with an insertion block (17), and both sides of the inside of the filter box (7) are provided with an insertion slot (18) matched with the insertion block (17).

5. The energy recovery device for a furnace hydraulic system of claim 1, wherein: The energy recovery device body (1) is a shell structure, and the energy recovery device body (1) is made of high-strength alloy steel.

6. The energy recovery device for a furnace hydraulic system of claim 1, wherein: The outer side of the energy recovery device body (1) is provided with two groups of outer hoop rings (11), and the four around the outer hoop rings (11) are provided with fixing rings (22), and the support rods (12) pass through between the fixing rings (22).

7. The energy recovery device for a furnace hydraulic system according to claim 6, characterized in that: The outer hoop rings (11) near the energy recovery device body (1) are uniformly provided with buffer pads (21), and the buffer pads (21) are made of rubber material.

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