Manual control pneumatic braking device

Abstract

The utility model relates to the technical field of pneumatic equipment, and discloses a manual control pneumatic brake device which comprises a gas-liquid pressure cylinder arranged on a winch frame body through a cylinder connecting frame and comprising a pneumatic piston and rod and a hydraulic piston and rod; the brake belt is enveloped on the outer side of the winch brake hub; one end of the brake belt is connected with the pressing block through a brake belt connecting frame, and the other end is fixed on the winch frame body; the manual control mechanism is fixed on the winch frame body; and the manual control mechanism comprises a brake pneumatic control valve, a quick inlet pneumatic control valve and an adjustable pressure reducing valve, and is used for controlling the stretching of a piston rod in the pneumatic-hydraulic pressure cylinder and adjusting the tightness of a brake belt. Pressure air is used as a power source, the ratio of the sectional areas of a large piston and a small piston of a supercharger and the Pascal energy balance principle are utilized, the two pneumatic control valves and the adjustable pressure valve are manually controlled, rapid attaching is achieved, braking force is gradually applied, and the complete braking effect is achieved.

Description

Technical Field

[0001] This application relates to the field of pneumatic equipment technology, such as a hand-operated pneumatic braking device. Background Technology

[0002] Pneumatic winches, due to their excellent explosion-proof performance, are widely used in explosion-proof environments such as offshore platforms and drilling rigs. As a pneumatic lifting device, the pneumatic winch is a crucial power unit in pneumatic machinery, and the reliability and operational safety of its braking mechanism are paramount. Typical pneumatic winches are equipped with manual braking mechanisms that rely entirely on human operation, resulting in insufficient braking force. For ultra-large capacity or heavy-duty pneumatic winches, a large braking force is required for complete braking. When lowering a heavy object lifted by such a winch, the manually controlled manual brake is insufficient to fully stop it, allowing the object to descend rapidly, which is extremely dangerous and poses a significant safety hazard.

[0003] Furthermore, with increasing public awareness of safety, the requirements for equipment braking safety are also becoming more stringent, especially for large pneumatic winches, where braking must be safe and reliable. Based on this, this hand-controlled pneumatic braking device was developed. Utility Model Content

[0004] To solve the aforementioned technical problems, this utility model provides a hand-controlled pneumatic braking device that uses pressurized air as a power source. By utilizing the ratio of the cross-sectional area of ​​the piston of the booster to that of the piston and Pascal's principle of conservation of energy, it achieves rapid approach and gradual application of braking force through manual control of two pneumatic control valves and an adjustable pressure valve, thus achieving the effect of complete braking.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model provides a hand-operated pneumatic braking device, comprising:

[0007] A pneumatic-hydraulic booster cylinder is mounted on the winch frame via a cylinder connecting frame, and includes a pneumatic piston and rod and a hydraulic piston and rod.

[0008] The pressure block is fixed to the end of the piston rod of the gas-liquid booster cylinder;

[0009] The brake band wraps around the outside of the winch brake hub; one end of it is connected to the pressure block through the brake band connector, and the other end is fixed to the winch frame.

[0010] The manual control mechanism is fixed on the winch frame; the manual control mechanism includes: a brake air control valve, a fast-advance air control valve and an adjustable pressure reducing valve, used to control the extension and retraction of the piston rod in the air-hydraulic booster cylinder and adjust the tightness of the brake band.

[0011] In some embodiments, the brake air control valve and the fast-advance air control valve are fixed on the mounting bracket of the hand control mechanism;

[0012] The brake pneumatic control valve is used to control the air passages of the P1 and P4 ports of the pneumatic-hydraulic booster cylinder.

[0013] The fast-advance air control valve is used to control the air path of the P2 port and P3 port of the gas-liquid booster cylinder.

[0014] The adjustable pressure reducing valve is located in the air passage between the brake air control valve and the fast-advance air control valve.

[0015] In some embodiments, the hand control mechanism further includes:

[0016] The control handle is welded to the control fan block;

[0017] The control sector block has its bottom covered around the outer circumference of the rotating shaft and can rotate with the rotating shaft; its end is provided with teeth.

[0018] The small gear is fixed on the spindle of the adjustable pressure reducing valve and can rotate.

[0019] In some embodiments, the hand control mechanism further includes:

[0020] The fast-forward opening plate is fixed inside the control sector block, and its side near the fast-forward air control valve is inclined.

[0021] The brake activation plate is fixed to the outside of the control sector block, and its side near the brake air control valve is sloped.

[0022] In some embodiments, the outer side of the fixing frame is provided with a fast-forward limiting plate and a braking limiting plate, which are used to limit the control sector block.

[0023] The hand-operated pneumatic braking device provided in this application can achieve the following technical effects:

[0024] (1) The manual pneumatic braking device uses pressurized air as a power source. It utilizes the ratio of the cross-sectional area of ​​the large and small pistons of the booster and Pascal's principle of energy conservation. By manually controlling two pneumatic control valves and an adjustable pressure valve, it can quickly approach and gradually apply braking force to achieve the effect of complete braking.

[0025] (2) The components used in this device have high reliability and stability, are not prone to failure, and are relatively easy to maintain, which reduces the maintenance cost and downtime of the equipment.

[0026] (3) The hand-controlled pneumatic braking device can respond quickly and realize instant braking of equipment or moving parts, effectively shortening the braking distance and braking time, and improving the safety and reliability of pneumatic winch operation.

[0027] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0029] Figure 1 This is a schematic diagram of the overall structure of a hand-operated pneumatic braking device provided in an embodiment of this disclosure;

[0030] Figure 2 This is a front view of the hand control mechanism provided in the embodiments of this disclosure;

[0031] Figure 3 This is an internal schematic diagram of the hand control mechanism provided in an embodiment of this disclosure;

[0032] Figure 4 yes Figure 3 Schematic diagram of the connection between the central braking air control valve and the fast-advance air control valve on the control sector block (direction A);

[0033] Figure 5 This is a schematic diagram of the control principle of a hand-operated pneumatic braking device provided in an embodiment of this disclosure;

[0034] Figure 6 This is a schematic diagram of the working process of the pneumatic-hydraulic booster cylinder in a hand-controlled pneumatic braking device provided in this embodiment of the present disclosure;

[0035] Figure 7 This is a schematic diagram of the operating position of the hand control mechanism in a hand-controlled pneumatic braking device provided in an embodiment of this disclosure;

[0036] Figure label:

[0037] 1. Pneumatic-hydraulic booster cylinder; 2. Cylinder connecting frame; 3. Stroke adjusting column; 4. Pressure block; 5. Brake band connecting frame; 6. Fixing bolt; 7. Brake band; 8. Brake support frame; 9. Manual control mechanism; 10. Manual control mechanism fixing frame; 101. Hydraulic oil; 102. Pneumatic piston and rod; 103. Hydraulic piston and rod; 104. Chamber 1; 105. Chamber 2; 106. Chamber 3; 107. Chamber 4; 108. Chamber 5; 90 1. Brake pneumatic control valve; 902. Quick-advance pneumatic control valve; 903. Control handle; 904. Control sector block; 905. Pinion gear; 906. Quick-advance limit plate; 907. Brake limit plate; 908. Fixing bracket; 909. Support base; 910. Adjustable pressure reducing valve; 911. Rotating shaft; 912. Friction plate; 913. Compression nut; 914. Adjusting nut; 915. Quick-advance opening plate; 916. Brake opening plate. Detailed Implementation

[0038] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0039] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure 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 for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0040] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0041] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0043] Combination Figures 1-7 As shown, this disclosure provides a hand-operated pneumatic braking device, comprising:

[0044] The pneumatic-hydraulic booster cylinder 1 is mounted on the winch frame via a cylinder connecting frame 2, and includes a pneumatic piston and rod 102 and a hydraulic piston and rod 103.

[0045] The stroke adjusting column 3 has one end connected to the hydraulic piston rod and the other end connected to a nut fixed on the gas-liquid booster cylinder 1 via a thread. By rotating the stroke adjusting column 3, it moves axially under the action of the thread, thereby changing the effective stroke length of the piston or piston rod.

[0046] The pressure block 4 is fixed to the end of the hydraulic piston rod of the gas-liquid booster cylinder 1 by fixing bolts 6;

[0047] Brake band 7 encloses the outside of the winch brake hub; one end of it is connected to pressure block 4 through brake band connecting bracket 5, and the other end is fixed to the winch frame through brake support bracket 8.

[0048] The manual control mechanism 9 is fixed to the winch frame via a manual control mechanism mounting bracket 10. The manual control mechanism 9 includes a brake air control valve 901, a fast-advance air control valve 902, and an adjustable pressure reducing valve 910. The brake air control valve 901 and the fast-advance air control valve 902 are fixed to the mounting bracket 908 of the manual control mechanism 9 and are used to control the extension and retraction of the piston rod in the pneumatic-hydraulic booster cylinder 1 and adjust the tension of the brake band 7. The mounting bracket 908 is fixed to a support base 909, which is connected to the manual control mechanism mounting bracket 10 via bolts.

[0049] Specifically, in this embodiment, the brake air control valve 901 is used to control the air passages of port P1 and port P4 of the air-hydraulic booster cylinder 1; wherein port P1 is connected to chamber 104 of the air-hydraulic booster cylinder 1, chamber 104 is connected to chamber 2 105, and the interior contains hydraulic oil 101; port P4 is connected to chamber 3 106 of the air-hydraulic booster cylinder 1.

[0050] The fast-advance pneumatic control valve is used to control the air passages of ports P2 and P3 of the pneumatic-hydraulic booster cylinder 1; port P2 is connected to chamber 5 108 of the pneumatic-hydraulic booster cylinder 1, which is located above the pneumatic piston and rod 102; port P3 is connected to chamber 4 107 of the pneumatic-hydraulic booster cylinder 1. Chambers 3 106, 4 107, and 5 108 are filled with gas.

[0051] The adjustable pressure reducing valve 910 is located in the air passage between the brake air control valve 901 and the fast-advance air control valve 902.

[0052] In some embodiments, the hand control mechanism further includes:

[0053] The control handle 903 is welded to the control sector block 904;

[0054] The control block 904 has its bottom covered around the outer circumference of the rotating shaft 911. Specifically, it is fixed to the outer circumference of the rotating shaft 911 by a friction plate 912, a clamping nut 913, and an adjusting nut 914, and can rotate with the rotating shaft 911; its end is provided with teeth.

[0055] The pinion 905 is fixed on the spindle of the adjustable pressure reducing valve 910. By meshing with the teeth on the control sector block 904 and rotating accordingly, it regulates the intake pressure, thereby regulating the thrust of the pneumatic piston and rod 102. Specifically, during the process from the initial position (brake band fully released) to the rapid extension position, the pinion 905 does not mesh with the teeth on the control sector block 904; it only meshes with the teeth on the control sector block 904 when the braking state is entered.

[0056] In some embodiments, the hand control mechanism further includes:

[0057] The fast-forward opening plate 915 is fixed inside the control sector block 904, and its side near the fast-forward air control valve 902 is inclined.

[0058] The brake opening plate 916 is fixed on the outside of the control sector block 904, and its side near the brake air control valve 901 is a slope.

[0059] In some embodiments, the outer side of the fixing frame 908 is provided with a fast-forward limiting plate 906 and a braking limiting plate 907, which are used to limit the control sector block 904. Specifically, the fast-forward limiting plate 906 is used to limit the position of the fast-forward opening plate 915, and the braking limiting plate 907 is used to limit the braking opening plate 916.

[0060] Below, in conjunction with Figure 5 , Figure 6 and Figure 7 The working process of this device is described below:

[0061] The starting position is when brake band 7 is fully released, and the brake clearance is at its maximum. Figure 7 At the initial position, the control lever of the fast-advance air control valve 902 is on the fast-advance opening plate 915, and the control lever of the fast-advance air control valve 902 is compressed. The air path controlled by the fast-advance air control valve 902 puts port P4 in the air intake state. The incoming pressurized air pushes the hydraulic piston and rod 103 upward, causing the hydraulic oil 101 to enter chamber 104 from chamber 2 105. Figure 7 As shown in the starting position.

[0062] When the equipment requires manual braking, turn the operating control handle 903 to... Figure 7In the rapid extension position, the control lever of the rapid advance pneumatic control valve 902 descends from above the rapid advance opening plate 915, extending the control lever of the rapid advance pneumatic control valve 902. The air path controlled by the rapid advance pneumatic control valve 902 keeps port P1 in an air-supplying state. The air entering through port P1 pushes hydraulic oil 101 rapidly from chamber one 104 into chamber two 105, pushing the hydraulic piston and rod 103 downwards rapidly, causing the brake band 7 to move rapidly, eliminating the brake gap, and initiating braking. However, the braking force is not large; the magnitude of the braking force is the thrust generated by chamber one 104 under low air pressure, which pushes hydraulic oil 101 into chamber two 105. The hydraulic oil 101 pushes the hydraulic piston and rod 103 downwards, generating the braking force. Simultaneously, the control lever of the brake pneumatic control valve 901 is in the extended state, and the air path controlled by it keeps port P3 in an air-supplying state, causing the pneumatic piston and rod 102 to move upwards.

[0063] Continue operating the control handle 903, causing the control lever of the brake opening plate 916 to pass over the inclined surface of the brake opening plate 916 and reach its top, compressing the control lever of the brake air control valve 901. This adjusts the position of the valve core inside the brake air control valve 901, switching it to the air intake state, so that port P2 is in the air supply state. In this state, the pneumatic piston and rod 102 moves downward, and the piston rod of the pneumatic piston and rod 102 pushes the hydraulic piston and rod 103 downward, gradually increasing the braking force. At the same time, the teeth on the control sector block 904 mesh with the pinion 905, controlling the sector block 904. The rotation of the drive pinion 905 rotates, which in turn drives the adjustable pressure reducing valve 910 to rotate, gradually increasing the intake pressure. The increase in intake pressure gradually increases the thrust of the pneumatic piston and rod 102, causing it to move downwards. At the same time, it also gradually moves the hydraulic piston and rod 103 downwards. Utilizing the ratio of the cross-sectional area of ​​the large and small pistons of the booster and Pascal's principle of energy conservation, the downward movement speed of the hydraulic piston and rod 103 is slower than that of the pneumatic piston and rod 102, but the thrust increases proportionally, that is, the braking force increases proportionally. In this way, a braking function with a larger braking force is achieved.

[0064] If the brake is released, simply pull the control handle 903 back to the initial position. At this time, the fast-advance air control valve 902 is in the P4 port air intake state under the action of the fast-advance opening plate 915, pushing the hydraulic piston and rod 103 to move up quickly, causing the brake band 7 to move up, so that the brake band 7 is completely released.

[0065] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A hand operated pneumatic braking device, characterised in that, The application relates to a hand-operated brake mechanism for a winch, which comprises the following parts: a gas-liquid pressure cylinder arranged on a winch frame body through a gas cylinder connecting frame, which comprises a gas piston and a rod and a liquid piston and a rod; a pressing block fixed at the end of the piston rod of the gas-liquid pressure cylinder; a brake belt enveloped outside a winch brake hub; one end of the brake belt is connected with the pressing block through a brake belt connecting frame, and the other end is fixed on the winch frame body; a hand control mechanism fixed on the winch frame body, which comprises a brake air control valve, a fast-forward air control valve and an adjustable pressure reducing valve for controlling the extension and retraction of the piston rod in the gas-liquid pressure cylinder and adjusting the tightness of the brake belt. The brake air control valve and the fast-forward air control valve are fixed on a fixed frame of the hand control mechanism. The brake air control valve is used for controlling the air path of P1 and P4 of the gas-liquid pressure cylinder. The fast-forward air control valve is used for controlling the air path of P2 and P3 of the gas-liquid pressure cylinder. The adjustable pressure reducing valve is arranged in the air path between the brake air control valve and the fast-forward air control valve.

2. A hand operated pneumatic braking device according to claim 1, characterised in that The hand control mechanism further comprises the following parts: a control handle welded with a control sector block; the control sector block is wrapped around the outer periphery of a rotating shaft and can rotate with the rotating shaft, and the end of the control sector block is provided with a gear; a pinion is fixed on the core shaft of the adjustable pressure reducing valve and can rotate.

3. A hand operated pneumatic braking device according to claim 1, characterised in that The hand control mechanism further comprises the following parts: a fast-forward opening plate fixed on the inner side of the control sector block, and the side close to the fast-forward air control valve is a bevel; a brake opening plate fixed on the outer side of the control sector block, and the side close to the brake air control valve is a bevel. The outer side of the fixed frame is provided with a fast-forward limiting plate and a brake limiting plate, and the fast-forward limiting plate and the brake limiting plate are used for limiting the control sector block.

4. A hand operated pneumatic braking device according to claim 1, characterised in that ​ ​ ​ 5. A hand operated pneumatic braking device according to claim 2, wherein ​

Images