Pneumatic control system for clutch and brake and bar cold shearing machine

Abstract

The utility model provides a pneumatic control system for a clutch and a brake and a bar cold shearing machine, and belongs to the technical field of bar cold shearing machines, the control system comprises a first electromagnetic gas valve and a second electromagnetic gas valve, the first electromagnetic gas valve is connected with the brake, and the second electromagnetic gas valve is connected with the clutch. Interlocking of a brake and a clutch control gas circuit is achieved through combined connection of the first electromagnetic gas valve and the second electromagnetic gas valve, and the clutch combination problem when the brake is in a braking state can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bar cold shearing machine technical field, more specifically, it relates to a kind of clutch and brake pneumatic control system and bar cold shearing machine. BACKGROUND

[0002] Bar unit is more used to clutch type cold shearing machine to carry out fixed-length shearing to rolled material.Cold shearing machine high-speed gear shaft rotates through crank slider mechanism to make shear blade action to carry out fixed-length shearing to rolled material.Cold shearing machine high-speed gear shaft one side is equipped with air clutch, and the other side is equipped with air brake.

[0003] Existing clutch and brake pneumatic system is composed of two electromagnetic valves.One is two-position three normally closed electromagnetic valve, for controlling clutch;Another is two-position three normally open electromagnetic valve, for controlling brake.Cold shearing machine does not shear, and the electromagnetic valve coil of controlling clutch loses electricity, and air clutch exhausts, and clutch separates, and pulley drives flywheel idling.The electromagnetic valve coil of controlling brake also loses electricity, and brake brakes, and high-speed gear shaft cannot rotate;Cold shearing machine shears, and the electromagnetic valve coil of controlling brake is electrified, and brake is in release state, and the electromagnetic coil of controlling clutch is also electrified, and clutch is in combined state, and flywheel and pulley drive high-speed gear shaft rotation through combined clutch, and cold shearing machine shear blade action realizes shearing.When electromagnetic valve element appears fault, brake installed in the one side of cold shearing machine high-speed gear shaft is in braking state, and clutch installed in the other side of the same high-speed gear shaft is in combined state, and flywheel and pulley rotation drive high-speed gear shaft high-speed rotation through combined clutch.That is, brake prevents high-speed gear shaft rotation, and clutch drives high-speed gear shaft rotation in the same time, and contradictory transmission state can cause high-speed gear shaft, clutch, brake, belt and other transmission components serious damage. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of clutch and brake pneumatic control system and bar cold shearing machine, solves the problem that existing clutch and brake pneumatic control system cannot realize clutch and brake linkage.

[0005] To achieve the above-mentioned purpose, the first aspect of the utility model provides a kind of clutch and brake pneumatic control system, comprising:

[0006] A first electromagnetic air valve is provided with a first air inlet, a first air outlet, a second air outlet, a first air exhaust, a second air exhaust and a first electromagnetic coil, when the first electromagnetic coil loses electricity, the first air inlet is communicated with the first air outlet, and the second air outlet is communicated with the second air exhaust, when the first electromagnetic coil obtains electricity, the first air outlet is communicated with the first air exhaust, and the second air outlet is communicated with the first air inlet, the first air outlet is used for connecting the air tire of the brake, and the first air inlet is used for connecting the air source.

[0007] A second electromagnetic air valve is provided with a second air inlet, a third air outlet, a third air exhaust and a second electromagnetic coil, when the second electromagnetic coil loses electricity, the second air inlet is closed, and the third air outlet is communicated with the air exhaust, when the second electromagnetic coil obtains electricity, the third air outlet is communicated with the second air inlet, the second air inlet is connected with the second air outlet, and the third air outlet is used for connecting the air tire of the clutch.

[0008] Optionally, the clutch and brake pneumatic control system further comprises:

[0009] A first gas pressure relay is connected with the first air outlet and electrically connected with the second electromagnetic air valve.

[0010] Optionally, the clutch and brake pneumatic control system further comprises:

[0011] A second gas pressure relay is connected with the third air outlet and electrically connected with the first electromagnetic air valve.

[0012] Optionally, the first air inlet is connected with a stop valve.

[0013] Optionally, the first electromagnetic air valve is a three-position five-way electromagnetic air valve.

[0014] Optionally, the second electromagnetic air valve is a two-position three-way electromagnetic air valve.

[0015] In a second aspect, the utility model provides a bar cold shearing machine, comprising:

[0016] The clutch and brake pneumatic control system of the first aspect.

[0017] Optionally, the bar cold shearing machine further comprises:

[0018] A brake, the air tire of the brake is connected with the first air exhaust;

[0019] A clutch, the clutch is connected with the brake through a high-speed gear, and the air tire of the clutch is connected with the third air exhaust.

[0020] a flywheel, the flywheel being in driving connection with the clutch;

[0021] a belt pulley, the belt pulley being in driving connection with the clutch.

[0022] The clutch and brake pneumatic control system and the bar cold shearing machine have the beneficial effects that: the first electromagnetic air valve is connected with the brake, the second electromagnetic air valve is connected with the clutch, the interlocking of the brake and the clutch on the control air path is realized through the combination connection of the first electromagnetic air valve and the second electromagnetic air valve, and the problem that the clutch is combined in the state that the brake is braked can be avoided.

[0023] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, by way of example, of exemplary embodiments of the present application.

[0025] Figure 1 A schematic structural diagram of a clutch and brake pneumatic control system and a bar cold shearing machine according to one embodiment of the present application is shown.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1. first electromagnetic air valve; 11. first air inlet; 12. first air outlet; 13. second air outlet; 14. first air outlet; 15. second air outlet;

[0028] 2. second electromagnetic air valve; 21. second air inlet; 22. third air outlet; 23. third air outlet;

[0029] 4. first gas pressure relay;

[0030] 5. second gas pressure relay;

[0031] 6. gas source;

[0032] 7. stop valve;

[0033] 80. brake; 81. high-speed gear; 82. clutch; 83. flywheel; 84. belt pulley. DETAILED DESCRIPTION

[0034] Preferred embodiments of the present application will be described in more detail below. Although the following describes preferred embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thoroughly and completely conveyed to those skilled in the art, and so that the scope of the present application is fully conveyed to those skilled in the art.

[0035] As shown in Figure 1 The present embodiment provides a kind of clutch and brake pneumatic control system, comprising:

[0036] First electromagnetic air valve 1, first electromagnetic air valve 1 is equipped with first air inlet 11, first air outlet 12, second air outlet 13, first exhaust port 14, second exhaust port 15 and first electromagnetic coil, first electromagnetic coil loses electricity when first air inlet 11 and first air outlet 12 are communicated, second air outlet 13 and second exhaust port 15 are communicated, first air outlet 12 and first exhaust port 14 are communicated when first electromagnetic coil is powered, second air outlet 13 and first air inlet 11 are communicated, first air outlet 12 is used to connect the air tire of brake 80, first air inlet 11 is used to connect air source 6;

[0037] Second electromagnetic air valve 2, second electromagnetic air valve 2 is equipped with second air inlet 21, third air outlet 22, third exhaust port 23 and second electromagnetic coil, third air outlet 22 and exhaust port are communicated when second electromagnetic coil loses electricity, second air inlet 21 is closed when second electromagnetic coil is powered, third air outlet 22 and second air inlet 21 are communicated, second air inlet 21 is connected to second air outlet 13, third air outlet 22 is used to connect the air tire of clutch 82.

[0038] Specific implementation, clean compressed air provided by air source 6 enters first air inlet 11.Braking, the first electromagnetic coil of first electromagnetic air valve 1 is in the state of power failure, first air inlet 11 and first air outlet 12 are communicated, second air outlet 13 and second exhaust port 15 are communicated, compressed air enters the air tire of brake 80 through the channel of first air inlet 11 and first air outlet 12 stroke, and brake 80 is in the state of braking;Second electromagnetic coil of second electromagnetic air valve 2 is also in the state of power failure, second air inlet 21 is closed, third air outlet 22 and second air inlet 21 are communicated, and the compressed air in the air tire of clutch 82 is discharged through the channel formed by third air outlet 22 and second air inlet 21, the gas in the air tire of clutch 82 is atmospheric pressure, and clutch 82 is in the state of separation.

[0039] When the clutch 82 is engaged, the first electromagnetic coil of the first electromagnetic valve 1 is powered, the first inlet 11 is communicated with the second outlet 13, and the first outlet 12 is communicated with the first exhaust 14. The compressed air in the air chamber of the brake 80 is discharged through the channel formed by the first outlet 12 and the first exhaust 14, the air pressure in the air chamber of the brake 80 is atmospheric pressure, the brake 80 is in the released state, the compressed air enters the second inlet 21 of the second electromagnetic valve 2 through the first inlet 11 and the second outlet 13 of the first electromagnetic valve 1, the second electromagnetic coil is powered after the first electromagnetic coil is powered for a set time, the second inlet 21 is communicated with the third outlet 22, the compressed air enters the air chamber of the clutch 82 through the channel formed by the second inlet 21 and the third outlet 22, and the clutch 82 is in the engaged state. In this embodiment, the set time is 0.5 seconds.

[0040] When the clutch 82 is engaged, if the first electromagnetic valve 1 fails to reverse, the first electromagnetic valve 1 remains in a state where the first inlet 11 is communicated with the first outlet 12 and the second outlet 13 is communicated with the second exhaust 15, and the brake 80 is in the braking state. Since the first inlet 11 of the first electromagnetic valve 1 is not communicated with the second outlet 13, the compressed air does not enter the second inlet 21 of the second electromagnetic valve 2, and even if the second electromagnetic coil is powered, the second electromagnetic valve 2 acts, and the clutch 82 will not be engaged.

[0041] Specifically, the clutch and brake pneumatic control system realizes the mutual interlocking of the control air paths of the brake 80 and the clutch 82 through the combination connection of the electromagnetic valves, which can avoid the problem that the clutch 82 is engaged when the brake 80 is in the braking state.

[0042] Optionally, the clutch and brake pneumatic control system further comprises:

[0043] The first gas pressure relay 4 is connected to the first outlet 12 and electrically connected to the second electromagnetic valve 2.

[0044] Specifically, the first gas pressure relay 4 is connected with the air inlet pipeline of the brake 80 air tire, used for detecting the pressure of the air tire pipeline connected with the brake 80, and sending an alarm signal when the pressure of the air tire pipeline of the brake 80 is lower than the first set pressure during braking, prompting that the pressure of the air source 6 is low. When the clutch 82 is combined, if the pressure of the air tire pipeline of the brake 80 is higher than the second set pressure after the first electromagnetic coil is powered on for a set time, the gas sends an alarm, prompting that the brake 80 is abnormal, and the second electromagnetic coil is simultaneously controlled to be de-energized, avoiding the problem that when the pressure of the air source 6 is too low, the clutch 82 works in a half-combined state, causing damage to the clutch 82, and also avoiding the problem that when the pressure in the air tire of the brake 80 is not reduced to normal pressure, the clutch 82 is combined, or when the pressure in the air tire of the clutch 82 is not reduced to normal pressure, the brake 80 is combined, causing damage to the brake 80, the clutch 82, the belt, the high-speed tooth shaft and other components. In the embodiment, the first set pressure is 0.55 Mpa, and the second set pressure is 0.1 Mpa.

[0045] Optionally, the clutch and brake pneumatic control system further comprises:

[0046] The second gas pressure relay 5 is connected with the third air outlet 22 and electrically connected with the first electromagnetic gas valve 1.

[0047] Specifically, the first gas pressure relay 4 is connected with the air inlet pipeline of the brake 80 air tire, used for detecting the pressure of the air tire pipeline connected with the brake 80, and sending an alarm signal when the pressure of the air tire pipeline of the brake 80 is lower than the first set pressure during braking, prompting that the pressure of the air source 6 is low. When the clutch 82 is combined, if the pressure of the air tire pipeline of the brake 80 is higher than the second set pressure after the first electromagnetic coil is powered on for a set time, the gas sends an alarm, prompting that the brake 80 is abnormal, and the second electromagnetic coil is simultaneously controlled to be de-energized, avoiding the problem that when the pressure of the air source 6 is too low, the clutch 82 works in a half-combined state, causing damage to the clutch 82, and also avoiding the problem that when the pressure in the air tire of the brake 80 is not reduced to normal pressure, the clutch 82 is combined, or when the pressure in the air tire of the clutch 82 is not reduced to normal pressure, the brake 80 is combined, causing damage to the brake 80, the clutch 82, the belt, the high-speed tooth shaft and other components. In the embodiment, the first set pressure is 0.55 Mpa, and the second set pressure is 0.1 Mpa.

[0048] Optionally, the first air inlet 11 is connected with a stop valve 7.

[0049] Specifically, the stop valve 7 is in an open state in a normal working state, and is closed to cut off the air source 6 when the system is maintained.

[0050] Preferably, the first electromagnetic gas valve 1 is a three-position five-way electromagnetic gas valve.

[0051] Preferably, the second electromagnetic gas valve 2 is a two-position three-way electromagnetic gas valve.

[0052] The embodiment also provides a bar cold shearing machine, comprising:

[0053] The clutch and brake pneumatic control system in the embodiment.

[0054] Specifically, the existing pneumatic control system of the cold shear brake 80 and the clutch 82 has the problem that the failure of the electromagnetic valve and other elements will cause the brake 80 installed on one side of the high-speed gear shaft to be in a braking state, while the clutch 82 installed on the other side of the same high-speed gear shaft is in a combined state, and the rotation of the flywheel 83 and the pulley 84 drives the high-speed gear shaft to rotate at high speed through the combined clutch 82. That is, the brake 80 will stop the rotation of the high-speed gear shaft at the same time, and the clutch 82 will drive the high-speed gear shaft to rotate, which will cause the transmission parts such as the high-speed gear shaft, the clutch 82, the brake 80, and the belt to be damaged seriously.

[0055] The bar cold shear machine in the embodiment is provided with a locking relationship of the gas path of the clutch and brake pneumatic control system, so that even if the electromagnetic valve and other elements fail, the clutch 82 will not be combined when the brake 80 on the high-speed gear shaft is braking, thereby avoiding the damage of the high-speed gear shaft, the clutch 82, the brake 80, and the belt caused by the damage of the electromagnetic valve. In addition, the first gas pressure relay 4 and the second gas pressure relay 5 can avoid the problem of damage of the clutch 82 caused by the clutch 82 working in a half-combined state when the pressure of the gas source 6 is too low, and can also avoid the problem of damage of the brake 80, the clutch 82, the belt, and the high-speed gear shaft caused by the clutch 82 being combined when the gas pressure in the air tire of the brake 80 does not decrease to normal pressure, or the brake 80 being combined when the gas pressure in the air tire of the clutch 82 does not decrease to normal pressure.

[0056] Optionally, the bar cold shear machine further comprises:

[0057] a brake 80, the air tire of the brake 80 being connected with the first exhaust port 14;

[0058] a clutch 82, the clutch 82 being connected with the brake 80 through the high-speed gear 81, and the air tire of the clutch 82 being connected with the third exhaust port 23;

[0059] a flywheel 83, the flywheel 83 being in transmission connection with the clutch 82;

[0060] a pulley 84, the pulley 84 being in transmission connection with the clutch 82.

[0061] Specifically, when the air inside the air chamber of the clutch 82 is filled with compressed air, the clutch 82 is in the engaged state. When the air inside the air chamber of the clutch 82 is discharged, the clutch 82 is in the disengaged state. When the air inside the air chamber of the brake 80 is filled with compressed air, the brake 80 is in the braking state. When the air inside the air chamber of the brake 80 is discharged, the brake 80 is in the released state. The air intake and discharge of the air chambers of the clutch 82 and the brake 80 are controlled by the pneumatic systems of the clutch 82 and the brake 80.

[0062] The above has described the various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A pneumatic control system for a clutch and brake, characterized in that, Comprising: A first electromagnetic air valve (1) is provided with a first air inlet (11), a first air outlet (12), a second air outlet (13), a first air exhaust (14), a second air exhaust (15) and a first electromagnetic coil, when the first electromagnetic coil is de-energized, the first air inlet (11) is communicated with the first air outlet (12), the second air outlet (13) is communicated with the second air exhaust (15), when the first electromagnetic coil is energized, the first air outlet (12) is communicated with the first air exhaust (14), the second air outlet (13) is communicated with the first air inlet (11), the first air outlet (12) is used to connect the air tire of the brake (80), the first air inlet (11) is used to connect the air source (6); A second electromagnetic air valve (2) is provided with a second air inlet (21), a third air outlet (22), a third air exhaust (23) and a second electromagnetic coil, when the second electromagnetic coil is de-energized, the second air inlet (21) is closed, the third air outlet (22) is communicated with the air exhaust, when the second electromagnetic coil is energized, the third air outlet (22) is communicated with the second air inlet (21), the second air inlet (21) is connected with the second air outlet (13), the third air outlet (22) is used to connect the air tire of the clutch (82).

2. The pneumatic control system for clutches and brakes according to claim 1, characterized in that, Further comprising: A first gas pressure relay (4) is connected with the first air outlet (12) and electrically connected with the second electromagnetic air valve (2).

3. The pneumatic control system for clutches and brakes according to claim 1, characterized in that, Further comprising: A second gas pressure relay (5) is connected with the third air outlet (22) and electrically connected with the first electromagnetic air valve (1).

4. The clutch and brake pneumatic control system according to claim 1, wherein The first air inlet (11) is connected with a stop valve (7).

5. The clutch and brake pneumatic control system according to claim 1, wherein The first electromagnetic air valve (1) is a three-position five-way electromagnetic air valve.

6. The clutch and brake pneumatic control system according to claim 1, wherein The second electromagnetic air valve (2) is a two-position three-way electromagnetic air valve.

7. A bar cold shearing machine, characterized by Comprising: The clutch and brake pneumatic control system according to any one of claims 1-6.

8. Bar cold shearing machine according to claim 7, characterized in that Further comprising: A brake (80) is connected with the first air exhaust (14); A clutch (82) is connected with the brake (80) through a high-speed gear (81), the clutch (82) is connected with the third air exhaust (23); A flywheel (83) is drivingly connected with the clutch (82); A pulley (84) is drivingly connected with the clutch (82).

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