Double-cylinder control grinding system

Abstract

The utility model discloses a double-cylinder control polishing system which comprises a polishing device, a control cylinder, a first pressure regulating valve, a second pressure regulating valve, a compressed air source, a balance cylinder and a pressure regulating control unit, and the compressed air source is connected with a large cavity of the control cylinder through the first pressure regulating valve and connected with a small cavity of the control cylinder through the second pressure regulating valve. The control cylinder is connected with the polishing device; the compressed air source is connected with a small cavity of the balance cylinder through the pressure regulating control unit, and the balance cylinder is connected with the polishing device. The gravity of the grinding device can be balanced in the grinding stage through the balance air cylinder, emergency lifting when the grinding device breaks down can be achieved, the control air cylinder adjusts the pressure of a large cavity and the pressure of a small cavity through the first pressure adjusting valve and the second pressure adjusting valve, and accurate control over the grinding pressure can be achieved; and normal lifting, hovering and pressing control of the grinding device can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a double-cylinder controlled grinding system. Background Art

[0002] When grinding rails, the grinding device needs to apply a certain grinding pressure so that the grinding wheel presses the rails tightly.

[0003] Some current grinding devices usually use hydraulic cylinders, electric cylinders or air cylinders as actuators to provide grinding pressure for the grinding devices.

[0004] When hydraulic cylinder control is used, the grinding pressure is high and it is difficult to achieve low pressure control. In addition, hydraulic oil leakage can easily cause driving safety hazards, the cost of use is high, and maintenance is inconvenient.

[0005] When electric cylinder control is used, displacement control is generally used. When the power fluctuates, it is easy for the electric cylinder adjustment to cause the grinding wheel to not contact the rail, resulting in discontinuous grinding.

[0006] When cylinder control is used, usually single cylinder control is used. In order to overcome the weight of the grinding device, a cylinder with a larger cylinder diameter is generally selected or the system pressure is increased. Due to the larger cylinder diameter or the larger system pressure adjustment range, the response time is easily prolonged, which makes the grinding effect worse. Utility Model Content

[0007] The utility model aims to provide a double-cylinder controlled grinding system, which can realize accurate control of grinding pressure and works safely and reliably.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A double-cylinder controlled grinding system, comprising a grinding device, and further comprising:

[0010] A control cylinder, a first pressure regulating valve, a second pressure regulating valve and a compressed air source, wherein the compressed air source is connected to the large cavity of the control cylinder through the first pressure regulating valve, and is connected to the small cavity of the control cylinder through the second pressure regulating valve, and the control cylinder is connected to the polishing device;

[0011] A balancing cylinder and a pressure regulating control unit, wherein the compressed air source is connected to the small cavity or the large cavity of the balancing cylinder through the pressure regulating control unit, and the balancing cylinder is connected to the polishing device.

[0012] Preferably, the pressure regulating control unit comprises a third pressure regulating valve and a first solenoid valve, and the compressed air source is connected to the small chamber or the large chamber of the balancing cylinder via the third pressure regulating valve and the first solenoid valve in sequence.

[0013] Preferably, the pressure regulating control unit also includes a fourth pressure regulating valve, a second solenoid valve and a pressure-stabilizing air cylinder. The compressed air source is connected to the small chamber or the large chamber of the balancing cylinder through the fourth pressure regulating valve and the second solenoid valve in sequence. The pressure-stabilizing air cylinder is connected to the air path between the fourth pressure regulating valve and the second solenoid valve. The pressure-stabilizing air cylinder is used to stabilize the pressure of the small chamber or the large chamber of the balancing cylinder.

[0014] Preferably, the first solenoid valve and the second solenoid valve are connected to the small chamber of the balancing cylinder through the same shuttle valve.

[0015] Preferably, a pressure sensor is connected to the air path connecting the shuttle valve and the balancing cylinder. The pressure sensor is used to allow the compressed air provided by the compressed air source to enter the small chamber or the large chamber of the balancing cylinder through the third pressure regulating valve, the first solenoid valve and the shuttle valve when a pressure abnormality is detected.

[0016] Preferably, the compressed air source is connected to the fourth pressure regulating valve via a one-way valve.

[0017] Preferably, the first pressure regulating valve and the second pressure regulating valve are proportional pressure regulating valves.

[0018] Preferably, the dual-cylinder controlled grinding system also includes a first emergency control unit, which is communicatively connected with the first pressure regulating valve, the second pressure regulating valve and the first solenoid valve, and the first emergency control unit is used to control the first solenoid valve to connect its emergency circuit when the first pressure regulating valve or the second pressure regulating valve loses power, so as to lift the grinding device to the highest position.

[0019] Preferably, the dual-cylinder controlled grinding system also includes a second emergency control unit, which is communicatively connected to the first solenoid valve and the second solenoid valve. The second emergency control unit is used to control the first solenoid valve to connect its emergency circuit when the first solenoid valve and the second solenoid valve lose power, so as to lift the grinding device to the highest position.

[0020] Compared with the prior art, the above technical solution has the following advantages:

[0021] The utility model provides a dual-cylinder controlled grinding system, including a grinding device, a control cylinder, a first pressure regulating valve, a second pressure regulating valve, a compressed air source, a balancing cylinder and a pressure regulating control unit. The compressed air source is connected to the large cavity of the control cylinder through the first pressure regulating valve, and is also connected to the small cavity of the control cylinder through the second pressure regulating valve, and the control cylinder is connected to the grinding device; the compressed air source is connected to the small cavity or large cavity of the balancing cylinder through the pressure regulating control unit, and the balancing cylinder is connected to the grinding device. The balancing cylinder can balance the gravity of the grinding device itself during the grinding stage, and can be used for emergency lifting when the grinding device fails. The control cylinder adjusts the pressure of its large and small cavities through the first pressure regulating valve and the second pressure regulating valve, which can achieve precise control of the grinding pressure, and can achieve normal lifting, hovering and downward pressure control of the grinding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a dual-cylinder controlled grinding system provided in a specific implementation manner of the utility model.

[0024] The reference numerals are as follows:

[0025] 1 is a grinding device, 2 is a control cylinder, 3 is a balancing cylinder, 4 is a first pressure regulating valve, 5 is a second pressure regulating valve, 6 is a compressed air source, 7 is a third pressure regulating valve, 8 is a first solenoid valve, 9 is a shuttle valve, 10 is a pressure sensor, 11 is a one-way valve, 12 is a fourth pressure regulating valve, 13 is a pressure-stabilizing air cylinder, and 14 is a second solenoid valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of 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.

[0027] Please refer to Figure 1The embodiment of the utility model provides a dual-cylinder controlled grinding system, including a grinding device 1, a control cylinder 2, a first pressure regulating valve 4, a second pressure regulating valve 5, a compressed air source 6, a balancing cylinder 3 and a pressure regulating control unit. The compressed air source 6 can provide clean and safe compressed air. The compressed air source 6 is connected to the large cavity of the control cylinder 2 through the first pressure regulating valve 4, and is also connected to the small cavity of the control cylinder 2 through the second pressure regulating valve 5. The control cylinder 2 is connected to the grinding device 1. The first pressure regulating valve 4 and the second pressure regulating valve 5 can be selected as proportional pressure regulating valves; the compressed air source 6 is connected to the small cavity of the balancing cylinder 3 through the pressure regulating control unit, and the balancing cylinder 3 is connected to the grinding device 1. The balancing cylinder 3 can balance the gravity of the grinding device 1 during the grinding stage, and can be used for emergency lifting when the grinding device 1 fails. The control cylinder 2 adjusts the pressure of its large and small cavities through the first pressure regulating valve 4 and the second pressure regulating valve 5, which can achieve precise control of the grinding pressure and normal lifting, hovering and downward pressure control of the grinding device 1.

[0028] In some embodiments, the pressure regulating control unit includes a third pressure regulating valve 7 and a first solenoid valve 8, and the compressed air source 6 is connected to the small cavity of the balancing cylinder 3 through the third pressure regulating valve 7 and the first solenoid valve 8 in sequence. When the grinding device 1 fails, the first solenoid valve 8 connects its air path, and the compressed air of the compressed air source 6 enters the small cavity of the balancing cylinder 3 through the third pressure regulating valve 7 and the first solenoid valve 8 in sequence, thereby realizing the emergency lifting of the grinding device 1. The pressure regulating control unit also includes a fourth pressure regulating valve 12, a second solenoid valve 14 and a pressure stabilizing air cylinder 13, and the compressed air source 6 is connected to the small cavity of the balancing cylinder 3 through the fourth pressure regulating valve 12 and the second solenoid valve 14 in sequence, and the pressure stabilizing air cylinder 13 is connected to the air path between the fourth pressure regulating valve 12 and the second solenoid valve 14, and the pressure stabilizing air cylinder 13 is used to perform pressure compensation on the small cavity of the balancing cylinder 3, reduce pressure fluctuations, realize balanced lifting or lowering of the grinding device 1, or realize constant pressure control of the grinding device 1, or ensure the stability of the hovering process of the grinding device 1. The third pressure regulating valve 7 and the fourth pressure regulating valve 12 can be selected as precision pressure regulating valves. The first solenoid valve 8 and the second solenoid valve 14 are connected to the small chamber of the balancing cylinder 3 through the same shuttle valve 9 .

[0029] In some embodiments, a pressure sensor 10 is connected to the air path connecting the shuttle valve 9 and the balancing cylinder 3. The pressure sensor 10 is used to detect abnormal pressure. The compressed air provided by the compressed air source 6 enters the small chamber of the balancing cylinder 3 through the third pressure regulating valve 7, the first solenoid valve 8 and the shuttle valve 9. At this time, the balancing cylinder 3 can be raised, thereby achieving the purpose of emergency lifting of the grinding device 1.

[0030] In some embodiments, the compressed air source 6 is connected to the fourth pressure regulating valve 12 via a one-way valve 11 , and the one-way valve 11 can prevent the compressed air from flowing back, thereby ensuring the stability and accuracy of the control of the pressure-stabilizing air cylinder 13 .

[0031] In some embodiments, the dual-cylinder controlled grinding system also includes a first emergency control unit, which is communicated with the first pressure regulating valve 4, the second pressure regulating valve 5 and the first solenoid valve 8. When the first pressure regulating valve 4 or the second pressure regulating valve 5 loses power, for example, during the grinding process, the first pressure regulating valve 4 or the second pressure regulating valve 5 loses power abnormally, causing the grinding device 1 to work abnormally. At this time, the first emergency control unit controls the first solenoid valve 8 to connect its emergency circuit. The emergency circuit refers to the air circuit where the first solenoid valve 8 is located, so that the grinding device 1 is lifted to the highest position, thereby ensuring the safety of work.

[0032] In some embodiments, the dual-cylinder controlled grinding system also includes a second emergency control unit, which is communicated with the first solenoid valve 8 and the second solenoid valve 14. When the first solenoid valve 8 and the second solenoid valve 14 lose power, for example, during the operation of the grinding device 1, the second solenoid valve 14 abnormally loses power, causing the balancing cylinder 3 to operate abnormally, and ultimately causing the grinding device 1 to operate abnormally. At this time, the second emergency control unit controls the first solenoid valve 8 to connect its emergency circuit to lift the grinding device 1 to the highest position, thereby ensuring the safety of the work.

[0033] In summary, the working principle of a dual-cylinder controlled grinding system provided by the present application is as follows:

[0034] Smooth lifting or lowering of the grinding device 1: the second solenoid valve 14 is energized to adjust the fourth pressure regulating valve 12 so that the balancing cylinder 3 can balance the self-gravity of the grinding device 1. At the same time, the first pressure regulating valve 4 and the second pressure regulating valve 5 are controlled to control the pressure difference between the large and small chambers of the control cylinder 2. The pressure-stabilizing air cylinder 13 performs pressure compensation on the small chamber of the balancing cylinder 3 to reduce its pressure fluctuation, thereby achieving smooth lifting or lowering of the grinding device 1.

[0035] Constant pressure control of the grinding device 1: the second solenoid valve 14 is energized to adjust the fourth pressure regulating valve 12 so that the balancing cylinder 3 can balance the self-gravity of the grinding device 1. At the same time, the first pressure regulating valve 4 and the second pressure regulating valve 5 are controlled to control the large and small chambers of the control cylinder 2 to keep the system balanced. The pressure-stabilizing air cylinder 13 performs pressure compensation on the small chamber of the balancing cylinder 3 to reduce its pressure fluctuation, thereby realizing constant pressure control of the grinding device 1.

[0036] For the hovering control of the grinding device 1, the second solenoid valve is energized to adjust the fourth pressure regulating valve 12 so that the balancing cylinder 3 can balance the self-weight of the grinding device 1. At the same time, the first pressure regulating valve 4 and the second pressure regulating valve 5 are controlled to control the pressure difference between the large and small chambers of the control cylinder 2. After the grinding device 1 is lifted to the set point at a predetermined speed, the pressure of the large and small chambers of the control cylinder 2 is adjusted to lock the grinding device 1 after hovering. The pressure-stabilizing air cylinder 13 performs pressure compensation on the small chamber of the balancing cylinder 3 to reduce its pressure fluctuation, thereby achieving a smooth hovering process of the grinding device 1.

[0037] When both the proportional pressure regulating valve and the solenoid valve lose power or the pressure sensor 10 transmits an abnormal pressure signal, the first solenoid valve 8 connects the emergency circuit and the grinding device 1 automatically rises to the highest position, thereby realizing the emergency lifting function.

[0038] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The above is a detailed introduction to a dual-cylinder controlled grinding system provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A dual-cylinder controlled grinding system, comprising a grinding device (1), characterized in that: Also includes: A control cylinder (2), a first pressure regulating valve (4), a second pressure regulating valve (5) and a compressed air source (6), wherein the compressed air source (6) is connected to the large chamber of the control cylinder (2) through the first pressure regulating valve (4), and is connected to the small chamber of the control cylinder (2) through the second pressure regulating valve (5), and the control cylinder (2) is connected to the polishing device (1); A balancing cylinder (3) and a pressure regulating control unit, wherein the compressed air source (6) is connected to the small cavity or the large cavity of the balancing cylinder (3) through the pressure regulating control unit, and the balancing cylinder (3) is connected to the polishing device (1).

2. The dual-cylinder controlled grinding system according to claim 1, characterized in that: The pressure regulating control unit comprises a third pressure regulating valve (7) and a first solenoid valve (8), and the compressed air source (6) is connected to the small chamber or the large chamber of the balancing cylinder (3) via the third pressure regulating valve (7) and the first solenoid valve (8) in sequence.

3. The dual-cylinder controlled grinding system according to claim 2, characterized in that: The pressure regulating control unit further comprises a fourth pressure regulating valve (12), a second solenoid valve (14) and a pressure stabilizing air cylinder (13); the compressed air source (6) is connected to the small chamber or the large chamber of the balancing cylinder (3) via the fourth pressure regulating valve (12) and the second solenoid valve (14) in sequence; the pressure stabilizing air cylinder (13) is connected to the air path between the fourth pressure regulating valve (12) and the second solenoid valve (14); the pressure stabilizing air cylinder (13) is used to stabilize the pressure of the small chamber or the large chamber of the balancing cylinder (3).

4. The dual-cylinder controlled grinding system according to claim 3, characterized in that: The first solenoid valve (8) and the second solenoid valve (14) are connected to the small chamber or the large chamber of the balancing cylinder (3) via the same shuttle valve (9).

5. The dual-cylinder controlled grinding system according to claim 4, characterized in that: A pressure sensor (10) is connected to the air path connecting the shuttle valve (9) and the balancing cylinder (3). The pressure sensor (10) is used to allow the compressed air provided by the compressed air source (6) to enter the small chamber or the large chamber of the balancing cylinder (3) through the third pressure regulating valve (7), the first solenoid valve (8) and the shuttle valve (9) when a pressure abnormality is detected.

6. The dual-cylinder controlled grinding system according to claim 5, characterized in that: The compressed air source (6) is connected to the fourth pressure regulating valve (12) via a one-way valve (11).

7. The dual-cylinder controlled grinding system according to claim 1, characterized in that: The first pressure regulating valve (4) and the second pressure regulating valve (5) are proportional pressure regulating valves.

8. The dual-cylinder controlled grinding system according to claim 3, characterized in that: The device further comprises a first emergency control unit, wherein the first emergency control unit is in communication with the first pressure regulating valve (4), the second pressure regulating valve (5) and the first solenoid valve (8), and the first emergency control unit is used for controlling the first solenoid valve (8) to connect its emergency circuit when the first pressure regulating valve (4) or the second pressure regulating valve (5) loses power, so as to lift the grinding device (1) to the highest position.

9. The dual-cylinder controlled grinding system according to claim 3, characterized in that: The invention also comprises a second emergency control unit, which is in communication with the first solenoid valve (8) and the second solenoid valve (14), and is used for controlling the first solenoid valve (8) to connect its emergency circuit when the first solenoid valve (8) and the second solenoid valve (14) lose power, so as to lift the grinding device (1) to the highest position.

Images