Locking cover tightening mechanism of liquefied petroleum gas cylinder valve assembly machine

Abstract

The present invention provides a locking cover tightening mechanism of a liquefied petroleum gas cylinder valve assembly machine, and belongs to the field of mechanical technology. It solves the problem that the locking cover tightening mechanism of the existing liquefied petroleum gas cylinder valve assembly machine has an unsatisfactory tightening effect and low working efficiency. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine comprises a bracket, the bracket is provided with a clamping cylinder and a lifting cylinder capable of driving the clamping cylinder to reciprocate and lift, the clamping cylinder is located on the upper side of the turntable, the bracket is provided with a rotating rod capable of rotating and a driving member driving the rotating rod to rotate, the bracket is provided with a lifting mechanism capable of driving the rotating rod to reciprocate and lift, the rotating rod is located on the lower side of the turntable and the rotating rod is coaxially arranged with the clamping cylinder. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine has the advantages of good tightening effect and high working efficiency.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a locking cover tightening mechanism, in particular to a locking cover tightening mechanism of a liquefied petroleum gas cylinder valve assembly machine. Background Art

[0002] At present, the assembly of the self-closing valve of the petroleum liquefied gas cylinder valve is mostly done manually, including the need to assemble the spring, the outlet valve seat, the high and low pressure leakage detection, the installation of the positioning pin, etc. in sequence. Due to the large number of assembly stations and movements, repeated manual operations will cause fatigue, resulting in installation errors, and even work-related accidents or occupational diseases. In addition, the operation takes a long time and the work efficiency is low, which affects the large-scale production of the self-closing valve products of the entire petroleum liquefied gas cylinder valve.

[0003] For example, a plugging device disclosed in a Chinese patent document (application number: 201420091608.5) includes a bracket, a slide rail is vertically arranged on the bracket, a slide seat is slidably arranged on the slide rail and is driven by a cylinder to move up and down, a tightening mechanism is arranged on the slide seat, and a rotating feeding mechanism is arranged on one side of the bracket to rotate and send the plugging to the bottom of the tightening mechanism. However, when the plugging device rotates the plugging, the tightening effect is not ideal and the working efficiency is not high. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to provide a locking cover tightening mechanism for a liquefied petroleum gas cylinder valve assembly machine with better tightening effect and higher working efficiency.

[0005] The purpose of the present invention can be achieved through the following technical solutions: a locking cover tightening mechanism of a liquefied petroleum gas cylinder valve assembly machine, the liquefied petroleum gas cylinder valve assembly machine includes a turntable, the turntable is provided with a tooling, the locking cover tightening mechanism includes a bracket, characterized in that the bracket is provided with a clamping cylinder and a lifting cylinder capable of driving the clamping cylinder to reciprocate and rise and fall, the clamping cylinder is located on the upper side of the turntable, the bracket is provided with a rotating rod capable of rotating and a driving member for driving the rotating rod to rotate, the bracket is provided with a lifting mechanism capable of driving the rotating rod to reciprocate and rise and fall, the rotating rod is located on the lower side of the turntable and the rotating rod is coaxially arranged with the clamping cylinder.

[0006] A tool is provided on the turntable of the liquefied petroleum gas cylinder valve assembly machine, and the tool includes a positioning cylinder arranged on the turntable, a rotating column capable of rotation is provided in the positioning cylinder, and the rotating column can be lifted and lowered reciprocatingly relative to the positioning cylinder, and a protruding push rod and a convex head are provided at the middle of the upper end of the rotating column, and the positioning cylinder can be lifted and lowered reciprocatingly, and a reset spring is provided between the positioning cylinder and the turntable. When the turntable drives the tool to rotate to the tightening mechanism of the locking cover, the locking cover, the valve core sleeve, the reset spring, the valve stem and the valve body are sequentially installed on the tool from bottom to top, and the push rod passes through the locking sleeve. The valve core sleeve and the spring, and the valve body sleeve are arranged at the upper end of the positioning cylinder. When tightening the locking cover, the lifting cylinder drives the clamping cylinder to press the upper end of the valve body, and then drives the rotating rod to rise through the lifting mechanism. The rotating rod pushes the rotating column and the locking cover mounted on the rotating column to rise to the threaded hole of the valve body. The rotating rod is driven to rotate by the driving member, and the rotating rod drives the rotating column to rotate to screw the locking cover into the valve body. The locking cover tightening mechanism has the advantages of better tightening effect, higher assembly effect and reliable operation.

[0007] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, a guide cylinder is fixedly connected to the piston rod of the lifting cylinder 1, and the clamping cylinder is arranged in the guide cylinder. A spring is arranged in the guide cylinder, and the two ends of the spring respectively abut against the guide cylinder and the clamping cylinder. The spring is arranged so that the clamping cylinder has a good buffering effect when pressed on the valve body, so that the locking sleeve can be screwed into the valve body more smoothly, and at the same time, it has a good protective effect on the valve body.

[0008] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, the lower end of the guide cylinder is fixedly connected with an anti-drop ring, the outer side wall of the clamping cylinder is provided with a convex shoulder, the clamping cylinder passes through the anti-drop ring and the convex shoulder can abut against the inner end surface of the anti-drop ring. The anti-drop ring is provided to prevent the clamping cylinder from falling off from the guide cylinder, which has the advantages of simple structure and reliable operation.

[0009] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, the driving member is a servo motor, and the lower end of the rotating rod is fixedly connected to the main shaft of the servo motor. The driving member is a servo motor, which can control the rotation speed of the rotating rod to make the tightening smoother.

[0010] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, a lifting seat capable of reciprocating lifting is provided on the bracket, and the housing of the servo motor is fixedly connected to the lifting seat.

[0011] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, the lifting mechanism is a lifting cylinder 2 arranged on the bracket, and the piston rod of the lifting cylinder 2 is fixedly connected to the lifting seat. The lifting seat is driven to lift and lower back and forth by the lifting cylinder 2, thereby driving the rotating rod to lift and lower back and forth, which has the advantages of simple structure and high working efficiency.

[0012] In the locking cover tightening mechanism of the above-mentioned liquefied petroleum gas cylinder valve assembly machine, the lifting mechanism includes a motor fixedly connected to the bracket and a screw rod fixedly connected to the bracket in a vertical axial direction. The motor drives the screw rod to rotate, and a nut is fixedly connected to the lifting seat and the screw rod is threadedly connected to the nut.

[0013] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, a vertically arranged guide rail is fixedly connected to the bracket, a slider is arranged on the lifting seat, and the guide rail is embedded in the slide groove of the slider. By arranging the guide rail and the slider, the lifting of the lifting seat has a better guiding effect.

[0014] In the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, the lower end of the pressing cylinder is fixedly connected with an anti-rotation washer, and the upper end surface of the anti-rotation washer protrudes from the lower end surface of the pressing cylinder. The lower end of the pressing cylinder is fixedly connected with an anti-rotation washer. When the pressing cylinder drives the anti-rotation washer to abut against the valve body, the valve body can be prevented from rotating, so that the locking cover can be smoothly screwed into the valve body, which has the advantage of reliable operation.

[0015] Compared with the prior art, the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine has the following advantages:

[0016] 1. When tightening the locking cover, the lifting cylinder 1 drives the pressing cylinder to press the upper end of the valve body, and then the lifting cylinder 2 drives the rotating rod to rise, and then the servo motor drives the rotating rod to rotate, and the rotating rod drives the rotating column to rotate to screw the locking cover into the valve body. The locking cover tightening mechanism has the advantages of better tightening effect, higher assembly effect and reliable work;

[0017] 2. A spring is arranged inside the guide cylinder, and the two ends of the spring respectively abut against the guide cylinder and the clamping cylinder, so that the clamping cylinder has a good buffering effect when pressed on the valve body, so that the locking sleeve can be screwed into the valve body more smoothly, and at the same time, it has a good protective effect on the valve body;

[0018] 3. The lower end of the clamping cylinder is fixedly connected with an anti-rotation washer. When the clamping cylinder drives the anti-rotation washer to lean against the valve body, the valve body can be prevented from rotating, so that the locking cover can be smoothly screwed into the valve body, which has the advantage of reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the tightening mechanism of the locking cover.

[0020] Figure 2 It is a working schematic diagram of the rotating rod of the locking cover tightening mechanism.

[0021] In the figure, 1, bracket; 2, clamping cylinder; 2a, boss; 3, lifting cylinder 1; 4, rotating rod; 5, driving part; 5a, servo motor; 6, lifting mechanism; 6a, lifting cylinder 2; 7, guide cylinder; 8, spring; 9, anti-slip ring; 10, lifting seat; 11, guide rail; 12, slider; 13, anti-rotation gasket; 14, turntable; 15, tooling; 15a, positioning cylinder; 15b, rotating column; 15b1, push rod; 15b2, boss; 16, liquefied petroleum gas cylinder valve; 16a, locking cover; 16b, valve core sleeve; 16c, reset spring; 16d, valve stem; 16e, valve body. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 and 2 As shown, the locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine, the liquefied petroleum gas cylinder valve 16 assembly machine includes a turntable 14, the turntable 14 is provided with a tool 15, the locking cover tightening mechanism includes a bracket 1, characterized in that the bracket 1 is provided with a clamping cylinder 2 and a lifting cylinder 3 that can drive the clamping cylinder 2 to reciprocate and rise, the clamping cylinder 2 is located on the upper side of the turntable 14, the bracket 1 is provided with a rotating rod 4 that can rotate and a driving member 5 that drives the rotating rod 4 to rotate, the driving member 5 is a servo motor 5a, the lower end of the rotating rod 4 is fixedly connected to the main shaft of the servo motor 5a, and has the function of controlling the rotation speed of the rotating rod 4, so that the tightening is carried out more smoothly. The bracket 1 is provided with a lifting mechanism 6 that can drive the rotating rod 4 to reciprocate and rise, the rotating rod 4 is located on the lower side of the turntable 14, and the rotating rod 4 is coaxially arranged with the clamping cylinder 2.

[0024] A guide cylinder 7 is fixedly connected to the piston rod of the lifting cylinder 3, and the clamping cylinder 2 is arranged in the guide cylinder 7. A spring 8 is arranged in the guide cylinder 7, and the two ends of the spring 8 respectively abut against the guide cylinder 7 and the clamping cylinder 2. An anti-slip ring 9 is fixedly connected to the lower end of the guide cylinder 7, and a convex shoulder 2a is arranged on the outer wall of the clamping cylinder 2. The clamping cylinder 2 passes through the anti-slip ring 9 and the convex shoulder 2a can abut against the inner end surface of the anti-slip ring 9 to prevent the clamping cylinder 2 from falling off from the guide cylinder 7. It has the advantages of simple structure and reliable operation.

[0025] The bracket 1 is provided with a lifting seat 10 that can be lifted and lowered reciprocatingly, and the housing of the servo motor 5a is fixedly connected to the lifting seat 10. The lifting mechanism 6 is a lifting cylinder 2 6a arranged on the bracket 1, and the piston rod of the lifting cylinder 2 6a is fixedly connected to the lifting seat 10. The lifting seat 10 is driven to be lifted and lowered reciprocally by the lifting cylinder 2 6a, thereby driving the rotating rod 4 to be lifted and lowered reciprocatingly, which has the advantages of simple structure and high working efficiency. As another way, the lifting mechanism 6 includes a motor fixedly connected to the bracket 1 and a screw rod fixedly connected to the bracket 1 in a vertical axial direction, the motor drives the screw rod to rotate, and a nut is fixedly connected to the lifting seat 10, and the screw rod is threadedly connected to the nut.

[0026] A vertically arranged guide rail 11 is fixedly connected to the bracket 1 , a slider 12 is arranged on the lifting seat 10 and the guide rail 11 is embedded in a slide groove of the slider 12 , so that the lifting of the lifting seat 10 has a better guiding effect.

[0027] The lower end of the pressing cylinder 2 is fixedly connected with an anti-rotation washer 13 , and the upper end surface of the anti-rotation washer 13 protrudes from the lower end surface of the pressing cylinder 2 .

[0028] The turntable 14 of the liquefied petroleum gas cylinder valve 16 assembly machine is provided with a tool 15, which includes a positioning cylinder 15a arranged on the turntable 14, a rotating column 15b that can rotate is arranged in the positioning cylinder 15a, and the rotating column 15b can be lifted and lowered reciprocatingly relative to the positioning cylinder 15a, and the middle part of the upper end of the rotating column 15b has a protruding push rod 15b1 and a convex head 15b2, and the positioning cylinder 15a can be lifted and lowered reciprocatingly, and a spring 8 is arranged between the positioning cylinder 15a and the turntable 14. When the turntable 14 drives the tool 15 to rotate to the locking cover tightening mechanism, the locking cover 16a, the valve core sleeve 16b, the return spring 16c, the valve stem 16d and the valve body 16e are sequentially installed on the tool 15 from bottom to top, and the push rod 15b1 passes through the locking sleeve. The valve core sleeve 16b and the return spring 16c, and the valve body 16e are sleeved on the upper end of the positioning cylinder 15a. The lower end of the rotating column 15b has a strip groove, and the upper end of the rotating rod 4 is provided with a strip convex body and the strip convex body can be embedded in the strip groove. When tightening the locking cover 16a, the lifting cylinder 13 drives the pressing cylinder 2 to descend so that the anti-rotation gasket 13 presses the upper end of the valve body 16e, and then the lifting cylinder 2 6a drives the lifting seat 10 and the servo motor 5a to rise, so that the rotating rod 4 pushes the rotating column 15b and the locking cover 16a installed on the rotating column 15b to rise to the threaded hole of the valve body 16e, and the rotating rod 4 is driven by the servo motor 5a to rotate, and the rotating rod 4 drives the rotating column 15b to rotate to screw the locking cover 16a into the valve body 16e. The locking cover tightening mechanism has the advantages of better tightening effect, higher assembly effect and reliable work. The servo motor 5a is provided with a torque sensor, which can sense whether the locking cover is screwed into the valve body, thereby improving the reliability of work.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0030] Although the terminology such as bracket 1, pressing cylinder 2, boss 2a, lifting cylinder 1 3, rotating rod 4, driving member 5, servo motor 5a, lifting mechanism 6, lifting cylinder 2 6a, guide cylinder 7, spring 8, anti-slip ring 9, lifting seat 10, guide rail 11, slider 12, anti-rotation washer 13, turntable 14, tooling 15, positioning cylinder 15a, rotating column 15b, push rod 15b1, boss 15b2, liquefied petroleum gas cylinder valve 16, locking cover 16a, valve core sleeve 16b, return spring 16c, valve stem 16d, valve body 16e is used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A locking cover tightening mechanism of a liquefied petroleum gas cylinder valve assembly machine, the liquefied petroleum gas cylinder valve assembly machine comprising a turntable (14), the turntable (14) being provided with a tool, the locking cover tightening mechanism comprising a bracket (1), characterized in that: The bracket (1) is provided with a clamping cylinder (2) and a lifting cylinder (3) capable of driving the clamping cylinder (2) to reciprocate and rise and fall. The clamping cylinder (2) is located on the upper side of the turntable (14). The bracket (1) is provided with a rotating rod (4) capable of rotating and a driving member (5) capable of driving the rotating rod (4) to rotate. The bracket (1) is provided with a lifting mechanism (6) capable of driving the rotating rod (4) to reciprocate and rise and fall. The rotating rod (4) is located on the lower side of the turntable (14) and the rotating rod (4) is coaxially arranged with the clamping cylinder (2). A guide cylinder (7) is fixedly connected to the piston rod of the lifting cylinder (3). The clamping cylinder (2) is arranged in the guide cylinder (7). A spring (8) is provided in the guide cylinder (7) and the two ends of the spring (8) are respectively abutted against the guide cylinder (7) and the clamping cylinder (2). The lower end of the guide cylinder (7) is fixedly connected with an anti-slip ring (9). The outer wall of the tightening cylinder (2) is provided with a convex shoulder (2a), the tightening cylinder (2) passes through the anti-slip ring (9) and the convex shoulder (2a) can abut against the inner end surface of the anti-slip ring (9), a tool (15) is provided on the turntable (14) of the liquefied petroleum gas cylinder valve assembly machine, the tool (15) includes a positioning cylinder (15a) arranged on the turntable (14), a rotating column (15b) capable of rotating is provided in the positioning cylinder (15a), and the rotating column (15b) can rotate. b) can be lifted and lowered reciprocatingly relative to the positioning cylinder (15a), the middle part of the upper end of the rotating column (15b) has a protruding top rod (15b1) and a convex head (15b2), the positioning cylinder (15a) can be lifted and lowered reciprocatingly and a spring (8) is provided between the positioning cylinder (15a) and the rotating disk (14), the lower end of the rotating column (15b) has a strip groove, the upper end of the rotating rod (4) is provided with a strip convex body and the strip convex body can be embedded in the strip groove.

2. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine according to claim 1, characterized in that: The driving member (5) is a servo motor (5a), and the lower end of the rotating rod (4) is fixedly connected to the main shaft of the servo motor (5a).

3. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine according to claim 2, characterized in that: The support (1) is provided with a lifting seat (10) capable of reciprocating lifting and lowering, and the housing of the servo motor (5a) is fixedly connected to the lifting seat (10).

4. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine according to claim 3, characterized in that: The lifting mechanism (6) is a lifting cylinder 2 (6a) arranged on the bracket (1), and the piston rod of the lifting cylinder 2 (6a) is fixedly connected to the lifting seat (10).

5. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine according to claim 3, characterized in that: The lifting mechanism (6) comprises a motor fixedly connected to the bracket (1) and a screw rod fixedly connected to the bracket (1) in a vertical axial direction. The motor drives the screw rod to rotate. A nut is fixedly connected to the lifting seat (10) and the screw rod is threadedly connected to the nut.

6. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine according to claim 3, characterized in that: The bracket (1) is fixedly connected with a vertically arranged guide rail (11), the lifting seat (10) is provided with a sliding block (12), and the guide rail (11) is embedded in the sliding groove of the sliding block (12).

7. The locking cover tightening mechanism of the liquefied petroleum gas cylinder valve assembly machine according to claim 1, 2 or 3, characterized in that: The lower end of the compression cylinder (2) is fixedly connected with an anti-rotation washer (13), and the upper end surface of the anti-rotation washer (13) protrudes from the lower end surface of the compression cylinder (2).

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