Overload protection device for mechanical valve of rubber vulcanizing machine

Abstract

The utility model relates to the technical field of overload protection of mechanical valves of rubber vulcanizing machines, and discloses an overload protection device of a mechanical valve of a rubber vulcanizing machine, which comprises a support, a support plate is fixedly connected in the support, a screw is arranged in the support plate, and an actuator guide sleeve is slidably connected to the outer side of the screw. A nut is installed at the bottom of the actuator guide sleeve, the nut is connected to the outer side of the screw in a threaded mode, an adjustable actuator is installed at the bottom of the nut, the periphery of the screw is sleeved with a spring, the spring is arranged between the supporting plate and the actuator guide sleeve, and an installation hole is formed in the top of the support. According to the utility model, under the mutual cooperation of the spring, the actuator guide sleeve and the adjustable actuator, the functions of clearance compensation and over-position protection for a mechanical structure are realized when the vulcanizing machine is opened and closed, and the internal leakage of a mechanical valve or the damage of the mechanical valve is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical valve overload protection of rubber vulcanizers, in particular to a mechanical valve overload protection device for rubber vulcanizers. Background Art

[0002] At present, in domestic all-steel radial tire shaping vulcanizers, the conversion of the control medium of compressed air for mold opening and closing is switched by a mechanical valve. The mechanical valve is a specific two-position three-way reversing valve, and its working principle is to realize the movement of the valve core by controlling the actuator (externally forced push). When the actuator is squeezed, the valve core will move into place, so that the medium in the pipeline enters the valve body from one port, and after passing through the channel of the valve core, it flows out from another port, switching the forward and reverse flow directions of the medium. The mechanical valve is often installed inside the wall panel of the vulcanizer. When the vulcanizer is fully closed in place, the valve core of the mechanical valve is pushed by a pressure rod installed on the upper crossbeam of the vulcanizer to realize the switching of the control air source of the internal pressure medium of vulcanization in the mold opening state and the mold closing state.

[0003] The existing mechanical valves of rubber vulcanizers can realize the switching of the control air source in the mold opening state and the mold closing state. However, the movement range of the valve core of the mechanical valve is small, and it is required that the position where the actuator pushes the valve core is very precise after the vulcanizer is closed to the closing position. When the installation distance between the mechanical valve and the actuator is too large, the valve core of the mechanical valve does not reach the position, resulting in internal leakage of the mechanical valve. When the installation distance between the mechanical valve and the actuator is too small, the actuator will damage the mechanical valve. Therefore, a mechanical valve overload protection device for rubber vulcanizers is proposed to solve the above problems. Content of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a mechanical valve overload protection device for rubber vulcanizers, aiming to improve the problem in the prior art that the position where the actuator pushes the valve core needs to be very precise, otherwise it will cause internal leakage of the mechanical valve or damage the mechanical valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A mechanical valve overload protection device for a rubber vulcanizer, including a bracket, a support plate is fixedly connected inside the bracket, a screw is arranged inside the support plate, an actuator guide sleeve is slidably connected to the outside of the screw, a nut is installed at the bottom of the actuator guide sleeve, the nut is threadedly connected to the outside of the screw, and an adjustable actuator is installed at the bottom of the nut;

[0007] As a further description of the above technical solution:

[0008] A spring is sleeved on the outer circumference of the screw, and the spring is arranged between the support plate and the actuator guide sleeve;

[0009] As a further description of the above technical solution:

[0010] The top of the bracket is provided with mounting holes;

[0011] As a further description of the above technical solution:

[0012] A gasket is installed on the top of the support plate, and the screw is slidably connected inside the gasket;

[0013] As a further description of the above technical solution:

[0014] A round block is provided at the end of the adjustable actuator;

[0015] As a further description of the above technical solution:

[0016] The diameter of the round block is 40 mm;

[0017] As a further description of the above technical solution:

[0018] The compressible stroke of the spring is 15 mm;

[0019] As a further description of the above technical solution:

[0020] There is an adjustable stroke of 5 mm between the adjustable actuator and the nut.

[0021] The utility model has the following beneficial effects:

[0022] In the utility model, through the cooperation of the spring, the actuator guide sleeve, the adjustable actuator and the round block, the mechanical valve spool will not move upward due to the force on the upper crossbeam of the vulcanizer, resulting in a change in the position of the mechanical valve spool, solving the problem of leakage of the mechanical valve caused by the change in the position of the mechanical valve spool of the vulcanizer, and avoiding the appearance of defective tires. Description of the Drawings

[0023] Figure 1 It is a plan view of the mechanical valve overload protection device of the rubber vulcanizer proposed by the utility model;

[0024] Figure 2 It is a structural view of the mounting hole of the mechanical valve overload protection device of the rubber vulcanizer proposed by the utility model.

[0025] Legend:

[0026] 1. Bracket; 2. Spring; 3. Actuator guide sleeve; 4. Nut; 5. Adjustable actuator; 6. Screw; 7. Support plate; 8. Mounting hole; 9. Round block; 10. Gasket. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Referring to Figure 1 and Figure 2 , an embodiment provided by the present utility model: A support plate 7 is fixedly connected inside the bracket 1. A screw 6 is arranged inside the support plate 7. An actuator guide sleeve 3 is slidably connected to the outside of the screw 6. A nut 4 is installed at the bottom of the actuator guide sleeve 3. The nut 4 is threadedly connected to the outside of the screw 6. An adjustable actuator 5 is installed at the bottom of the nut 4. The bracket 1 is used to connect various structures of the protection device. A spring 2 is sleeved on the outer periphery of the screw 6. The spring 2 is arranged between the support plate 7 and the actuator guide sleeve 3. The tension of the spring 2 matches the spring tension inside the mechanical valve. A round block 9 is arranged at the end of the adjustable actuator 5. The diameter of the round block 9 is 40 mm, which increases the contact area with the mechanical valve and prevents the mechanical valve from not opening due to non-concentricity. The compressible stroke of the spring 2 is 15 mm. The spring 2 and the actuator guide sleeve 3 drive the adjustable actuator 5 to move back and forth, realizing the compensation of the gap of the mechanical structure for mold closing and opening of the vulcanizer and the over-position protection function.

[0029] Referring to Figure 1 and Figure 2 , an installation hole 8 is opened at the top of the bracket 1. The protection device is installed on the cross beam of the vulcanizer through the installation hole 8. A gasket 10 is installed at the top of the support plate 7. The screw 6 is slidably connected inside the gasket 10 to disperse the pressure exerted by the screw 6 on the support plate 7. There is an adjustable stroke of 5 mm between the adjustable actuator 5 and the nut 4, which is convenient for on-site installation and daily maintenance.

[0030] Working principle: When the vulcanizer closes the mold, the round block 9 of the adjustable actuator 5 of the mechanical valve overload protection device contacts the valve stem of the mechanical valve of the vulcanizer. The actuator guide sleeve 3 of the mechanical valve overload protection device retracts under force. At the same time, the valve stem of the mechanical valve of the vulcanizer pushes the valve core to act, realizing the commutation of the mechanical valve of the vulcanizer. When the vulcanizer closes the mold to the limit position, the equipment stops and starts to enter the first step of the tire vulcanization state, the steam inlet stage, with a pressure of 1 MPa. When the tire vulcanization process proceeds to the sixth step of hot water inlet, the pressure inside the vulcanizer capsule increases to 2.7 MPa. The upper cross beam of the vulcanizer will move slightly upward due to the problem of the bearing bush gap. At this time, the actuator guide sleeve 3 of the mechanical valve overload protection device extends outward under the action of the spring 2 to ensure that the valve core of the mechanical valve of the vulcanizer remains in place.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Mechanical valve overload protection device for rubber vulcanizer, comprising a bracket (1), characterized in that: A support plate (7) is fixedly connected inside the bracket (1). A screw (6) is arranged inside the support plate (7). An actuator guide sleeve (3) is slidably connected to the outer side of the screw (6). A nut (4) is installed at the bottom of the actuator guide sleeve (3). The nut (4) is threadedly connected to the outer side of the screw (6). An adjustable actuator (5) is installed at the bottom of the nut (4).

2. The mechanical valve overload protection device of the rubber vulcanizing machine according to claim 1, characterized in that: A spring (2) is sleeved on the outer periphery of the screw (6). The spring (2) is arranged between the support plate (7) and the actuator guide sleeve (3).

3. The mechanical valve overload protection device of a rubber vulcanizer according to claim 1, characterized in that: An installation hole (8) is formed at the top of the bracket (1).

4. The mechanical valve overload protection device of the rubber vulcanizer according to claim 1, wherein: A gasket (10) is installed at the top of the support plate (7). The screw (6) is slidably connected inside the gasket (10).

5. The mechanical valve overload protection device for a rubber vulcanizer according to claim 1, characterized in that: A round block (9) is arranged at the end of the adjustable actuator (5).

6. The mechanical valve overload protection device for a rubber vulcanizer according to claim 5, characterized in that: The diameter of the round block (9) is 40 mm.

7. The mechanical valve overload protection device of the rubber vulcanizing machine according to claim 2, characterized in that: The compressible stroke of the spring (2) is 15 mm.

8. The mechanical valve overload protection device for a rubber vulcanizing machine according to claim 1, characterized in that: There is an adjustable stroke of 5 mm between the adjustable actuator (5) and the nut (4).

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