Hydraulic oil propelling system for gas tunnel kiln

Abstract

The utility model belongs to the technical field of kilns, and discloses a hydraulic oil propelling system for a gas tunnel kiln, which comprises an oil tank, a hydraulic cylinder and a hydraulic oil propelling assembly, the oil tank is used for storing hydraulic oil; the hydraulic cylinder is used for converting hydraulic energy into linear reciprocating motion; the hydraulic oil propelling assembly comprises a hydraulic pump, a driving part, a reversing valve, an overflow valve, a one-way valve, a speed regulating valve and a stop valve, the hydraulic pump is connected to the hydraulic cylinder through the reversing valve, the driving part is connected to the hydraulic pump, the two ends of the overflow valve are connected to the hydraulic pump and the oil tank respectively, and the one-way valve is connected to the speed regulating valve. The one-way valve and the speed regulating valve are connected with the hydraulic cylinder in parallel; by reducing the energy consumption in the no-load and high-pressure standby stages, the production cost is effectively reduced, meanwhile, the system can be flexibly adjusted according to different load requirements through accurate flow and pressure control, and the overall operation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of kiln technology, and in particular relates to a hydraulic oil propulsion system for gas-fired tunnel kilns. Background Technology

[0002] Gas-fired tunnel kilns are high-temperature firing equipment widely used in industries such as ceramics, refractory materials, and metal products. In a gas-fired tunnel kiln, products (usually placed on kiln cars) are continuously passed through a preheating zone, a high-temperature firing zone, and a cooling zone to complete the sintering or firing process. The propulsion system is responsible for continuously pushing the kiln cars into and out of the kiln to achieve automated production.

[0003] Existing hydraulic propulsion devices for gas-fired tunnel kilns require hydraulic pumps to run continuously to maintain system pressure, resulting in idle energy consumption even when the kiln car is not advancing. During the waiting phase when the kiln car is advancing intermittently, the hydraulic pumps still need to maintain high-pressure standby, and the overflow valve continues to release pressure, causing "high-pressure standby power consumption" to account for more than 20% of the total system energy consumption, affecting production costs. Utility Model Content

[0004] This invention addresses the problem in existing gas-fired tunnel kiln hydraulic propulsion devices that require continuous operation of the hydraulic pump to maintain system pressure, resulting in idle energy consumption even when the kiln car is not advancing; during the intermittent advancement of the kiln car, the hydraulic pump still needs to maintain high-pressure standby, and the overflow valve continuously releases pressure, causing "high-pressure standby power consumption" to account for more than 20% of the total system energy consumption, affecting production costs. The following technical solution is proposed:

[0005] A hydraulic oil propulsion system for a gas-fired tunnel kiln includes:

[0006] Oil tank, used to store hydraulic oil;

[0007] A hydraulic cylinder is used to convert hydraulic energy into linear reciprocating motion.

[0008] A hydraulic oil propulsion assembly includes a hydraulic pump, a drive unit, a directional valve, a relief valve, a check valve, a speed control valve, and a shut-off valve. The hydraulic pump is connected to the hydraulic cylinder through the directional valve. The drive unit is connected to the hydraulic pump. The two ends of the relief valve are respectively connected to the hydraulic pump and the oil tank. The check valve and the speed control valve are connected to the hydraulic cylinder in parallel. The shut-off valve is connected to the relief valve.

[0009] As a preferred embodiment of the above technical solution, the oil tank, hydraulic cylinder and hydraulic oil propulsion assembly are all connected by pipes, and each pipe connector is provided with a seal.

[0010] As a preferred embodiment of the above technical solution, a pressure sensor is also included, which is connected to the pipeline and used to detect the pressure in the hydraulic system oil circuit.

[0011] As a preferred embodiment of the above technical solution, the other end of the pressure sensor is connected to a servo controller, and the servo controller is connected to the drive unit via an encoder.

[0012] As a preferred embodiment of the above technical solution, the oil tank is further provided with multiple filters, which are used to filter impurities in the hydraulic oil.

[0013] As a preferred embodiment of the above technical solution, a pressure gauge is also connected to the shut-off valve.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention optimizes the hydraulic pump's operating time by employing hydraulic oil propulsion technology, reducing energy consumption during no-load and high-pressure standby phases, effectively lowering production costs. At the same time, precise flow and pressure control allows the system to be flexibly adjusted according to different load requirements, improving overall operating efficiency. Attached Figure Description

[0016] Figure 1 The diagram shows a flowchart of the overall structure of a hydraulic oil propulsion system for a gas-fired tunnel kiln;

[0017] Figure 2 What is shown is Figure 1 A schematic diagram of the structure of region A in the middle.

[0018] In the diagram: 1. Oil tank; 2. Hydraulic cylinder; 3. Hydraulic pump; 4. Drive unit; 5. Directional valve; 6. Relief valve; 71. Check valve; 72. Speed ​​control valve; 8. Shut-off valve; 9. Pressure sensor; 10. Encoder; 11. Servo controller; 12. Pressure signal interface; 13. Flow signal interface; 14. Filter; 15. Pressure gauge; 16. Level gauge. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] Example 1

[0021] This utility model provides a hydraulic oil propulsion system for gas-fired tunnel kilns, such as... Figures 1 to 2As shown, the hydraulic oil propulsion system of the gas-fired tunnel kiln includes an oil tank 1, a hydraulic cylinder 2, and a hydraulic oil propulsion assembly. The oil tank 1 is used to store hydraulic oil, and the hydraulic cylinder 2 is used to convert hydraulic energy into linear reciprocating motion. The hydraulic oil propulsion assembly includes a hydraulic pump 3, a drive component 4, a reversing valve 5, an overflow valve 6, a check valve 71, a speed regulating valve 72, and a shut-off valve 8. The hydraulic pump 3 is connected to the hydraulic cylinder 2 through the reversing valve 5. The drive component 4 is connected to the hydraulic pump 3 and is specifically configured as a servo motor. The two ends of the overflow valve 6 are connected to the oil tank 1 and the hydraulic pump 3, respectively. The check valve 71 and the speed regulating valve 72 are connected to the hydraulic cylinder 2 in parallel. The shut-off valve 8 is connected to the overflow valve 6.

[0022] In this embodiment, the oil tank 1, hydraulic cylinder 2, and hydraulic oil propulsion assembly are all connected by pipelines. The hydraulic oil flowing inside the pipelines forms the main oil circuit of the propulsion system, and each pipeline connection is equipped with a seal, which can be an O-ring or a sealing ring, etc., to prevent hydraulic oil leakage inside the pipeline and ensure the pressure in the entire main oil circuit pipeline.

[0023] Specifically, the propulsion system consists of the following components:

[0024] Hydraulic station: Driven by drive component 4, hydraulic pump 3 converts electrical energy into hydraulic energy and generates high-pressure oil;

[0025] Hydraulic cylinder 2: As an actuator, it converts hydraulic energy into linear reciprocating motion;

[0026] Control valve group: including directional valve 5, relief valve 6, check valve 71, speed control valve 72 and shut-off valve 8, etc., used to control the flow direction, pressure and speed of oil in the main oil circuit.

[0027] By activating the hydraulic pump 3 and drawing hydraulic oil from the oil tank 1, the drawn hydraulic oil is pressurized and delivered to the control valve group. The maximum working pressure of the entire system is set through the overflow valve 6. Subsequently, the hydraulic cylinder 2 is activated, thereby pushing the kiln car (or material tray) forward. The cylinder stroke is monitored by a displacement sensor or limit switch to control the propulsion distance.

[0028] When using it, the specific workflow is as follows:

[0029] Step 1: Power Generation

[0030] After the hydraulic pump 3 starts, it draws hydraulic oil from inside the oil tank 1, pressurizes it, and then delivers it to the control valve group through the pipeline;

[0031] Pressure regulation: The maximum working pressure of the entire propulsion system is set via overflow valve 6;

[0032] Step 2: Motion Control

[0033] Implementation Phase:

[0034] The operator or the automatic reciprocating control system issues a propulsion command to switch the hydraulic oil inlet to hydraulic cylinder 2, thereby completing the forward and backward movements;

[0035] When the directional valve 5 operates, it directs the high-pressure oil to the rodless chamber (piston side) of the hydraulic cylinder 2.

[0036] The piston rod of hydraulic cylinder 2 extends outward under oil pressure, pushing the push plate or push rod connected to the piston rod, thereby pushing the kiln car (or material tray) forward.

[0037] Return journey phase:

[0038] The directional valve 5 switches the oil circuit, and high-pressure oil enters the rod chamber (rod side) of the hydraulic cylinder 2;

[0039] The piston rod inside hydraulic cylinder 2 retracts, preparing for the next thrust.

[0040] Step 3: Speed ​​and Thrust Adjustment

[0041] One-way valve 71 and speed control valve 72: regulate the flow rate of oil entering hydraulic cylinder 2 and control the propulsion speed;

[0042] Pressure control valve: Adjusts system pressure and changes the output thrust of the hydraulic cylinder to adapt to different load requirements (such as material weight, kiln resistance);

[0043] Position detection: The stroke of hydraulic cylinder 2 is monitored by displacement sensor or limit switch to control the propulsion distance.

[0044] Based on the above work preparation process, the process of pushing and pushing the kiln car is completed. Through the set control valve group, the system can flexibly adjust the output power according to the load demand, avoiding unnecessary energy consumption. Especially in the waiting stage when the kiln car is not pushed or is pushed intermittently, the system can reduce the output power of the hydraulic pump 3 or enter the standby mode through intelligent control, thereby significantly reducing the "high pressure standby power consumption" and improving the overall energy efficiency.

[0045] It is worth noting that the end of the pressure sensor 9 is also connected to a servo controller 11. The servo controller 11 is connected to the drive unit 4 through the encoder 10. The servo controller 11 is also connected to a pressure signal interface 12 and a flow signal interface 13.

[0046] The pressure sensor 9 can monitor the working pressure of the system in real time and transmit the signal to the servo controller 11. The servo controller 11 uses the encoder 10 to precisely control the drive component 4 (servo motor) according to the received pressure signal, thereby realizing rapid response and stable adjustment of the system pressure. Through the pressure signal interface 12 and the flow signal interface 13, the system can obtain more comprehensive operating data. This data can be used for fault diagnosis and early warning, helping operators to discover and deal with potential problems in a timely manner and avoid the occurrence or expansion of faults.

[0047] The oil tank 1 is also equipped with multiple filters 14, which are used to filter impurities in the hydraulic oil. A pressure gauge 15 is also connected to the shut-off valve 8. The filters 14 can maintain the cleanliness of the hydraulic oil in the oil tank 1, reduce the wear and failure rate of various components in the hydraulic system, and clean hydraulic oil helps to ensure the normal operation of key components such as hydraulic cylinder 2 and hydraulic pump 3, extend their service life, and improve the overall performance and stability of the system. The oil tank 1 is also equipped with a level gauge 16 (such as a glass tube level gauge or an electronic level gauge), which can display the hydraulic oil level in the oil tank 1 in real time and accurately, so as to replenish the hydraulic oil in time and avoid problems such as insufficient system pressure or hydraulic pump 3 running dry due to low liquid level. The operator can observe the reading on the pressure gauge 15 in real time and understand the pressure changes of the system in a timely manner.

[0048] Working principle: In actual use, the operator adds hydraulic oil to the oil tank 1, and then the hydraulic pump 3 starts working and draws the hydraulic oil from the oil tank 1. The pressurized hydraulic oil is transported to the oil control valve group through the main oil pipeline. The reversing valve 5 works to guide the hydraulic oil to the rodless chamber (piston side) of the hydraulic cylinder 2. The piston rod of the hydraulic cylinder 2 extends outward under the action of oil pressure, pushing the push plate or push rod connected to the piston rod, thereby pushing the kiln car (or material pallet) to move forward.

[0049] When the kiln car needs to be returned, the reversing valve 5 switches the oil circuit, and high-pressure oil enters the rod chamber (rod side) of the hydraulic cylinder 2. Then the piston rod inside the hydraulic cylinder 2 retracts, preparing for the next advance.

[0050] By setting up control valve groups, the system can flexibly adjust the output power according to the load demand, avoiding unnecessary energy consumption. Especially during the waiting stage when the kiln car is not advancing or is advancing intermittently, the system can reduce the output power of the hydraulic pump 3 or enter standby mode through intelligent control, thereby significantly reducing "high-pressure standby power consumption" and improving overall energy efficiency.

[0051] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A hydraulic oil propulsion system for a gas-fired tunnel kiln, characterized in that, include: Oil tank (1), used to store hydraulic oil; Hydraulic cylinder (2) is used to convert hydraulic energy into linear reciprocating motion; The hydraulic oil propulsion assembly includes a hydraulic pump (3), a drive unit (4), a reversing valve (5), a relief valve (6), a check valve (71), a speed control valve (72), and a shut-off valve (8). The hydraulic pump (3) is connected to the hydraulic cylinder (2) through the reversing valve (5). The drive unit (4) is connected to the hydraulic pump (3). The two ends of the relief valve (6) are respectively connected to the hydraulic pump (3) and the oil tank (1). The check valve (71) and the speed control valve (72) are connected to the hydraulic cylinder (2) in parallel. The shut-off valve (8) is connected to the relief valve (6).

2. The hydraulic oil propulsion system for a gas-fired tunnel kiln according to claim 1, characterized in that, The oil tank (1), hydraulic cylinder (2) and hydraulic oil propulsion assembly are all connected by pipes, and each pipe connector is equipped with a seal.

3. The hydraulic oil propulsion system for a gas-fired tunnel kiln according to claim 1, characterized in that, It also includes a pressure sensor (9), which is connected to the pipeline and is used to detect the pressure in the hydraulic system oil circuit.

4. The hydraulic oil propulsion system for a gas-fired tunnel kiln according to claim 3, characterized in that, The other end of the pressure sensor (9) is connected to a servo controller (11), which is connected to the drive unit (4) via an encoder (10).

5. The hydraulic oil propulsion system for a gas-fired tunnel kiln according to claim 1, characterized in that, The oil tank (1) is also equipped with multiple filters (14) inside, which are used to filter impurities in the hydraulic oil.

6. The hydraulic oil propulsion system for a gas-fired tunnel kiln according to claim 1, characterized in that, A pressure gauge (155) is also connected to the shut-off valve (8).

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