New type of air motor long and short dual control gas distribution device

Abstract

The utility model discloses a novel pneumatic motor long-distance dual-control gas distribution device, which relates to the application field of pneumatic control technology, and includes a local control device, a remote control device and a connecting component, wherein the local control device and the remote control device are connected by the connecting component. The utility model sets two external air inlet and exhaust passages on the basis of the gas distribution valve body of the existing pneumatic motor local control device, and sets the valve body function to a center-sealed type. By setting a distribution valve core and a distribution valve sleeve, the middle position of the lower air cavity of the valve body is directly connected to the atmosphere, and the air pressure returns to zero, ensuring the realization of the equipment's air-cutting braking function; at the same time, the pneumatic motor can be steplessly regulated as the rotation angle of the operating handle assembly changes; in conjunction with the pneumatic motor's remote control device, a connecting component is used to realize the long-distance dual-control mode of the pneumatic motor in the combined state, filling the gap in the remote-control stepless speed regulation function of high-power pneumatic motors.

Description

Technical Field

[0001] The utility model relates to the application field of pneumatic control technology, in particular to a novel long-short double-control gas distribution device for pneumatic motors. Background Art

[0002] Pneumatic motor is a pneumatic power component that uses compressed air as a power source. Due to its superior explosion-proof, starting and overload self-protection performance, it is widely used in many aspects of social production and life. Its operation and control are important links in its safety guarantee. Pneumatic motors can be divided into piston type, vane type and gear type according to their power structure type, and their operation and control devices are also different or different. Piston pneumatic motors are all multi-cylinder structures with the characteristics of large torque and good load starting performance. They are suitable for pneumatic traction or lifting machinery with larger tonnage. Its operation is generally completed by a set of matching (structure and number of cylinders) gas distribution devices composed of distribution valves and gas distribution valves. The distribution valve controls the intake and exhaust of the two air chambers to realize the forward, reverse or stop of the winch. The gas distribution valve core rotates with the crankshaft to realize the alternation of supply and exhaust of each cylinder of the pneumatic motor, so as to realize the continuous operation of the motor.

[0003] At present, there are generally two types of pneumatic motor control: local control and remote control. With the continuous expansion of the application field of pneumatic machinery, according to different working environments and uses, in order to better ensure the safety of production operations, users have put forward many new requirements for the control type of equipment. Remote and near dual control is a special requirement for equipment with specific uses in specific environments. Because low-power pneumatic motors consume less gas, they can use a small-diameter molding valve combination to achieve remote and near dual control. However, high-power pneumatic motors consume more gas, and it is difficult to find molding valves that meet the requirements of remote and near dual control. In addition, the remote control device of the molding valve combination cannot achieve stepless speed regulation, which poses certain safety hazards.

[0004] The utility model patent with patent number 2010205824950 and name "Remote control device for pneumatic winch" discloses a remote control device for pneumatic winch, which can be used as a reference for the structure of the remote control device. Combined with the improvement of the local controlled air distribution device, it can realize the remote and local dual control mode of the high-power pneumatic motor. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the utility model provides a new type of pneumatic motor remote and local dual-control air distribution device. On the basis of the remote control device technology of the pneumatic winch, the utility model further improves the structure of the pneumatic motor local control air distribution device to meet and realize the coexistence of local and remote control modes, so as to adapt to the special control requirements of specific operations and more fully ensure the operating safety of equipment and personnel.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0007] A novel pneumatic motor long-distance and short-distance dual-control gas distribution device comprises a local control device, a remote control device and a connecting component, wherein the local control device and the remote control device are connected via the connecting component, wherein the local control device comprises a valve body, an operating handle assembly, a distribution valve core, a distribution valve sleeve, a distribution valve core, a distribution valve sleeve and various connecting components between the operating handle assembly and the distribution valve core, wherein the distribution valve sleeve and the distribution valve sleeve are pressed into two valve holes of the valve body to form a fixed connection that cannot be moved relative to each other, wherein the distribution valve core is arranged in the distribution valve sleeve, wherein the distribution valve core is arranged in the distribution valve sleeve, and a floating connection that rotates synchronously with the curved flat block of the pneumatic motor is formed through a cross connector, wherein the operating handle assembly and the distribution valve core are fixedly connected to rotate synchronously, wherein the operating handle assembly drives the distribution valve core to rotate to control the intake and exhaust of the two air cavities of the valve body and can automatically return to the middle position.

[0008] The valve body is provided with a brake air control port, an external intake and exhaust duct one and an external intake and exhaust duct two, the brake air control port is connected with the lower air cavity of the valve body, the external intake and exhaust duct one and the external intake and exhaust duct two are respectively connected with the intake and exhaust duct one and the intake and exhaust duct two of the valve body, the air inlet of the distribution valve sleeve is provided with a narrower end groove at the middle position of the operating handle end of the operating handle assembly, the corresponding position of the distribution valve core is provided with a key-shaped groove, and is connected with its exhaust duct through a vertical hole, when the operating handle assembly is in the middle position, the lower air cavity is connected with the exhaust duct of the distribution valve core through the air inlet end groove of the distribution valve and directly reaches the atmosphere, the pressure of the brake air control port is zero, and the brake system is braked by air-cutting.

[0009] The remote control device is configured to have the same functions as the operating handle and the distribution valve part of the local control device, and the distribution valve functions of both are configured to be center-sealed.

[0010] The connecting assembly includes pipe group 1, a shuttle valve, pipe group 2, pipe group 3 and pipe group 4. Pipe group 4 is used to connect the external air inlet and exhaust duct 1 and the external air inlet and exhaust duct 2 of the local control device with the air inlet and exhaust duct 1 and the air inlet and exhaust duct 2 of the remote control device. One end of pipe group 1 and pipe group 2 are connected to the air inlet of the shuttle valve, and the other end is respectively connected to the brake air control port of the local control device and the brake air control port of the remote control device. The air outlet of the shuttle valve is connected to the brake air control port of the braking system through pipe group 3.

[0011] The operating handle assemblies of the local control device and the remote control device can automatically return to the center position and have a locking function, and can be used as control devices alone to achieve local control or remote control. When the local control device and the remote control device are used independently, they can be set to the functional modes required by each by changing the valve sleeve and the valve core structure. However, when the local control device and the remote control device are combined to be used as a long-distance and short-distance dual-control gas distribution device, their respective distribution valves are set to a center-sealed type relative to the gas distribution valve function to avoid mutual interference or adverse effects during operation.

[0012] The utility model improves on the structure of the existing local control device of pneumatic motor, and two external inlet and exhaust passages are arranged on the basis of the gas distribution valve body, and the valve body functions are all set to the center-sealed type. By arranging the distribution valve core and the distribution valve sleeve, the middle position of the lower air cavity of the valve body is directly connected to the atmosphere, and the air pressure returns to zero, thereby ensuring the realization of the equipment's air-cutting braking function; at the same time, the stepless speed regulation of the pneumatic motor is realized with the change of the rotation angle of the operating handle assembly; in conjunction with the remote control device of the pneumatic motor, a connecting assembly is used to connect the remote control device with the local control device through the two external inlet and exhaust passages, so as to realize the far-near dual control mode of the pneumatic motor in the combined state, and the two do not interfere with each other and can be operated independently, and both the far-near dual control can realize stepless speed regulation, thus filling the blank of realizing the remote control stepless speed regulation function of high-power pneumatic motor, and the utility model has the advantages of simple structure, high safety, more flexible application and wide range, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main cross-section structure of the local control device of the utility model;

[0014] Figure 2 It is a schematic diagram of the side section structure of the local control device of the utility model;

[0015] Figure 3 This is a schematic diagram of the layout of the external intake and exhaust ducts of the local control device of the utility model;

[0016] Figure 4 This is a schematic diagram of the layout of the external intake and exhaust ducts of the remote control device of the utility model;

[0017] Figure 5 This is a schematic diagram of the cross-sectional structure of the remote control device of the utility model;

[0018] Figure 6 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-6As shown, the novel pneumatic motor remote and local dual-control gas distribution device includes a local control device 100, a remote control device 200 and a connecting component 300, and the local control device 100 and the remote control device 200 are connected via the connecting component 300.

[0021] The local control device 100 includes a valve body 110, an operating handle assembly 101, a distribution valve core 104, a distribution valve sleeve 106, a gas distribution valve core 114, a gas distribution valve sleeve 113, and various connecting components between the operating handle assembly 101 and the distribution valve core 104, wherein the connecting components include a torsion spring 102, a limit screw 103, a top cover screw plug 107, a plug 109, a valve stem 111, a steel ball 112, and a gas distribution valve cover 116. The distribution valve sleeve 106 and the gas distribution valve sleeve 113 are press-fitted into the two valve holes of the valve body 110 to form a fixed connection that cannot move relative to each other, and the distribution valve core 104 is arranged in the distribution valve sleeve 106.

[0022] The air distribution valve core 114 is arranged in the air distribution valve sleeve 113, and forms a floating connection for synchronous rotation with the curved flat block of the pneumatic motor through a cross connector 115. The operating handle assembly 101 and the distribution valve core 104 form a fixed connection for synchronous rotation through a key 105. The limit screw 103 is installed on the valve body 110. The torsion spring 108 is sleeved on the outer ring of the distribution valve core 104, the operating handle assembly 101, and the distribution valve sleeve 106, and is cross-mounted on both sides of the limit screw 103 and embedded in the positioning grooves on both sides of the operating handle assembly 101. Rotating the operating handle assembly 101 drives the distribution valve core 104 to rotate to control the intake and exhaust of the two air cavities of the valve body 110 and can automatically return to the middle position. The top cover screw plug 107 is installed at a position above the air cavity A on the valve body 110, and a compression spring 108, a plug 109, a valve stem 111, and a steel ball 112 are installed below in sequence. The plug 109 is seated on the step of the valve stem 111, and the compression spring 108 is sleeved on the upper end of the valve stem 111 and pressed on the upper end face of the plug 109. The plug 109 separates the upper air cavity A from the lower air cavity C through the sealing cone surface of the valve body 110, and the steel ball 112 is seated in the longitudinal arc groove of the distribution valve core 104; the distribution valve core 114 is installed in the distribution valve sleeve 113, and forms a synchronously rotating floating connection with the curved flat block of the pneumatic motor through the cross connector 115, so as to realize the sequential supply and exhaust switching and continuous operation of each cylinder of the pneumatic motor.

[0023] As an improved part, the valve body 110 is provided with a brake air control port H1, an external intake and exhaust duct F1 and an external intake and exhaust duct F2. The brake air control port H1 is connected with the lower air cavity C of the valve body 110. The external intake and exhaust duct F1 and the external intake and exhaust duct F2 are respectively connected with the intake and exhaust duct G1 and the intake and exhaust duct G2 of the valve body 110. A narrow end groove L is provided at the middle position of the air inlet of the distribution valve sleeve 106 near the operating handle end of the operating handle assembly 101. A key groove M is provided at the corresponding position of the distribution valve core 104, and is connected with its exhaust duct E through a vertical hole N. When the operating handle assembly 101 is in the middle position, the lower air cavity C is connected with the exhaust duct E of the distribution valve core 104 through the air inlet end groove of the distribution valve 106 and directly connected to the atmosphere. The pressure of the brake air control port H1 is zero, thereby realizing air-cut braking of the brake system.

[0024] The remote control device 200 adopts the structure of the operating handle assembly and the distribution valve assembly of the utility model patent with patent number 2010205824950 and the name "Remote Control Device for Pneumatic Winch", except that the function of the distribution valve relative to the air distribution valve is set to a center-sealed type. For the specific structure, please refer to the attached drawings, and for the principle, please refer to the patent document, which will not be repeated here.

[0025] The connecting assembly 300 includes a pipe group 1 301, a shuttle valve 302, a pipe group 2 303, a pipe group 3 304 and a pipe group 4 305. The pipe group 4 305 is used to connect the external intake and exhaust duct 1 F1 and the external intake and exhaust duct 2 F2 of the local control device 100 with the intake and exhaust duct 1 F11 and the intake and exhaust duct 2 F21 of the remote control device 200. One end of the pipe group 1 301 and the pipe group 2 303 are connected to the air inlet of the shuttle valve 302, and the other end is respectively connected to the brake air control port H1 of the local control device 100 and the brake air control port H2 of the remote control device 200. The air outlet of the shuttle valve 302 is connected to the brake air control port of the braking system through the pipe group 3 304.

[0026] As a preferred embodiment, the operating handle assemblies of the local control device 100 and the remote control device 200 can automatically return to the center position and have a locking function, and can be used as control devices alone to achieve local control or remote control. The respective distribution valves and air distribution valve functions are set to a center-sealed type. When the local control device is used alone, the external interfaces of the external intake and exhaust duct F1 and the external intake and exhaust duct F2 are blocked. When the device is not connected to the air-cut brake system, the brake air control port H1 is blocked.

[0027] The working principle and working process of the utility model are as follows, and are explained in conjunction with specific embodiments.

[0028] Embodiment 1: The local control device 100 is connected to the air-off brake system, and the air source is connected to the air inlet B1 of the local control device 100, and the brake air control port H1 is connected to the air-off brake system. The handle of the operating handle assembly 101 is moved to the left to disengage it from the slot of the valve body 110, and then the operating handle assembly 101 is pulled or pushed to drive the distribution valve core 104 to rotate. The steel ball 112 moves upward under the push of the distribution valve core 104, and the valve stem 111 pushes the plug 109 up and away from the conical sealing surface of the valve body 110. The upper air cavity A is connected with the lower air cavity C, and the compressed air opens the brake system through the brake control port H1. At the same time, the distribution valve core 104 is deflected to connect its air inlet duct D with the air inlet and exhaust duct 1 G2 or the air inlet and exhaust duct 2 G1, and the exhaust duct E It is connected with the intake and exhaust duct one G1 or the intake and exhaust duct two G2, so that the compressed air is allowed to enter the cylinder of the pneumatic motor from the air inlet B1 through the upper air cavity A, the lower air cavity C, the air inlet duct D, the intake and exhaust duct two G2 or the intake and exhaust duct one G1 and the intake and exhaust ducts of the air distribution valve sleeve 113 and the air distribution valve core 114, and then enter the air distribution duct of the air distribution valve core 114 and the air distribution duct of the air distribution valve sleeve 113, so as to push the piston connecting rod to move and drive the crankshaft assembly to rotate. The crankshaft assembly drives the air distribution valve core 114 to rotate through the cross joint 115, so that the cylinders of the pneumatic motor exchange the order of intake and exhaust in turn, and the pneumatic motor can continuously operate to output power, and the compressed air after expansion and work is discharged through the air distribution duct of the air distribution valve sleeve 113 and the exhaust duct of the air distribution valve core 114 and the distribution valve core 104.

[0029] Release the operating handle, and the operating handle assembly 101 drives the distribution valve core 104 back to the middle position under the torque of the torsion spring 102, and the steel ball 112 falls back to the low position. Under the action of the compression spring 108, the plug 109, the valve body 110 and the valve stem 111 move downward, and the plug 109 fits with the conical sealing surface of the valve body. The plug 109 separates the upper air cavity A from the lower air cavity C. The lower air cavity C is connected to the exhaust duct E of the distribution valve core 104 through the inlet end groove of the distribution valve sleeve 106 and directly connects to the atmosphere. The pressure of the brake air control port H1 returns to zero, and the brake system cuts off the air for braking.

[0030] Implementation of stepless speed regulation function: When the distribution valve core 104 rotates with the handle assembly 101, the larger the angle, the larger the overlapping area between the air inlet D of the distribution valve core 104 and the air inlet J of the distribution valve sleeve 106 and its air inlet and exhaust port 1 K1 or air inlet and exhaust port 2 K2, the larger the compressed air flow rate of the lower air cavity C entering the air inlet and exhaust port 1 G1 or the air inlet and exhaust port 2 G2, and at the same time, the larger the overlapping area between the exhaust channel E of the distribution valve core 104 and the air inlet and exhaust port 2 K2 or the air inlet and exhaust port 1 K1 of the distribution valve sleeve 106, the smoother the exhaust, and the faster the running speed of the pneumatic motor, thereby realizing stepless speed regulation control.

[0031] Embodiment 2, air motor long and short dual control mode (such as Figure 6As shown in FIG. 1 ), the local control device 100 is connected to the remote control device 200 through the connection assembly 300. The structure of the remote control device 200 also includes an operating handle assembly, a distribution valve assembly and a drive structure thereof, see Figure 5 The specific structure and principle belong to the contents disclosed in the patent described in the background technology, and will not be described one by one here.

[0032] When the local control device 100 and the remote control device 200 are used separately, their functions can be changed by changing the structure of the distribution valve core. When they are combined into a pneumatic motor long and short dual-control air distribution device, the distribution valve functions of the two parts can only be set to the center-sealed type.

[0033] The local control device 100 is installed on the pneumatic motor, and its external intake and exhaust duct one F1 and external intake and exhaust duct two F2 are connected to the intake and exhaust duct one F11 and intake and exhaust duct two F21 of the remote control device 200 respectively through the pipe group 305. One end of the pipe group 301 and the pipe group 303 are connected to the air inlet of the shuttle valve 302, and the other end is connected to the brake air control port H1 of the local control device 100 and the brake air control port H2 of the remote control device 200 respectively. The air outlet of the shuttle valve 302 is connected to the brake air control port of the braking system through the pipe group three 304.

[0034] The operating handle components of the local control device 100 and the remote control device 200 can automatically return to the center position and have a locking function. The control principles of the two parts are the same. The distribution valve functions are set to center sealing. Local control and remote control do not interfere with each other. The shuttle valve 302 is designed so that accurate linkage of the braking system can be achieved regardless of local control or remote control.

[0035] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A novel pneumatic motor remote dual-control gas distribution device, comprising a local control device (100), a remote control device (200) and a connecting assembly (300), wherein the local control device (100) and the remote control device (200) are connected via the connecting assembly (300), wherein the local control device (100) comprises a valve body (110), an operating handle assembly (101), a distribution valve core (104), a distribution valve sleeve (106), a gas distribution valve core (114), a gas distribution valve sleeve (113) and various connecting components between the operating handle assembly (101) and the distribution valve core (104), wherein the distribution valve sleeve (106) and the gas distribution valve core (114) are connected to each other. The valve sleeve (113) is pressed into the two valve holes of the valve body (110) to form a fixed connection that cannot move relative to each other. The distribution valve core (104) is arranged in the distribution valve sleeve (106). The gas distribution valve core (114) is arranged in the gas distribution valve sleeve (113) and forms a floating connection for synchronous rotation with the curved flat block of the pneumatic motor through a cross connector (115). The operating handle assembly (101) and the distribution valve core (104) form a fixed connection for synchronous rotation. Rotating the operating handle assembly (101) drives the distribution valve core (104) to rotate to achieve the control of the inlet and exhaust of the two air cavities of the valve body (110) and can automatically return to the middle position. It is characterized in that The valve body (110) is provided with a brake air control port (H1), an external intake and exhaust passage 1 (F1) and an external intake and exhaust passage 2 (F2); the brake air control port (H1) is in communication with a lower air cavity (C) of the valve body (110); the external intake and exhaust passage 1 (F1) and the external intake and exhaust passage 2 (F2) are respectively in communication with an intake and exhaust passage 1 (G1) and an intake and exhaust passage 2 (G2) of the valve body (110); the air inlet of the distribution valve sleeve (106) is close to the operating handle assembly (10 1) is provided with a relatively narrow end groove (L) at the middle position of the operating handle end, and a key-shaped groove (M) is provided at a corresponding position of the distribution valve core (104) and is connected to its exhaust passage (E) through a vertical hole (N); when the operating handle assembly (101) is in the middle position, the lower air chamber (C) is connected to the exhaust passage (E) of the distribution valve core (104) through the air inlet end groove of the distribution valve sleeve (106) and directly connected to the atmosphere, and the pressure of the brake air control port (H1) is zero, thereby realizing air-cut braking of the brake system; The remote control device (200) comprises an operating handle assembly and a distribution valve assembly, and the distribution valve function is set to a center-sealed type; The connection assembly (300) comprises a pipe group 1 (301), a shuttle valve (302), a pipe group 2 (303), a pipe group 3 (304) and a pipe group 4 (305); the pipe group 4 (305) is used to connect an external intake and exhaust duct 1 (F1) and an external intake and exhaust duct 2 (F2) of a local control device (100) with an intake and exhaust duct 1 (F11) and an intake and exhaust duct 2 (F21) of a remote control device (200); one end of the pipe group 1 (301) and the pipe group 2 (303) are connected to an air inlet of the shuttle valve (302), and the other ends are connected to a brake air control port (H1) of the local control device (100) and a brake air control port (H2) of the remote control device (200), respectively; the air outlet of the shuttle valve (302) is connected to a brake air control port of a brake system through the pipe group 3 (304).

2. The novel pneumatic motor remote and near dual-control gas distribution device according to claim 1 is characterized in that: The operating handle components of the local control device (100) and the remote control device (200) can automatically return to the center position and have a locking function, and can be used as a control device alone to achieve local control or remote control.

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