On-line controllable-force spinning tool for stove valve rod

Abstract

An on-line controllable-force spinning tool for a stove valve rod is characterized by comprising a support, a lifting air cylinder, a rotating air cylinder, a butt joint, a first electromagnetic valve, a second electromagnetic valve and a pressure-sensitive sensor, the butt joint is arranged at the power output end of the rotating air cylinder, and the bottom of the butt joint is provided with an inwards-concave limiting groove matched with the valve rod; and the pressure-sensitive sensor is arranged on the rotating cylinder, is used for sensing the downward pressure of the butt joint, and can be linked with the first electromagnetic valve. Manual operation is replaced, a visual system is not needed, the overall investment fund is small, automatic operation is achieved at low cost, installation and debugging are convenient and fast, the pressure-sensitive sensor feeds back the downward pressure of the air cylinder in real time, the downward pressure can be controlled and stable in cooperation with the first electromagnetic valve, and the detection quality can be improved.

Description

Technical Field

[0001] The utility model relates to a detection tool, in particular to a tool for online detection of a valve stem of a gas regulating valve. Background Art

[0002] The gas regulating valve is the main component of the gas stove. The gas regulating valve has a valve stem extending out of the stove shell. A knob is provided on the valve stem. The burner power can be adjusted by rotating and pressing the knob. The gas regulating valve stem is tested on the stove production line after installation. The process of pressing and rotating the knob is simulated. The following two methods are generally used in the existing technology:

[0003] 1. When using manual pressing and rotating, when pressing the knob, it is necessary to press it steadily until the detection is completed, which has the following shortcomings: first, the labor cost is high; second, the manual pressing force of the knob is uncontrollable and unstable. If the pressing force is too small, there is a risk of missed detection or false detection, and if the pressing force is too large, it may cause damage to the valve body; finally, the detection efficiency is low.

[0004] 2. Use visual positioning and servo to cooperate with spring downward pressure. The equipment investment is large, and the formula adjustment is required for valve stems of different heights. The spring force is unstable, and there will be torque deviation after long-term use. The spring will become fatigued due to the frequency of use, resulting in distortion of downward pressure. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an online controllable force spinning tool for a stove valve stem with stable detection and high efficiency in view of the above technical status quo.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: an online controllable force spinning tool for a stove valve stem, characterized in that it includes

[0007] Bracket;

[0008] A lifting cylinder is arranged on the aforementioned bracket;

[0009] A rotary cylinder, receiving the power output end of the aforementioned lifting cylinder;

[0010] The docking joint is arranged at the power output end of the aforementioned rotary cylinder, and has a concave limiting groove at the bottom thereof adapted to the valve stem;

[0011] A first solenoid valve connected to the air inlet and outlet of the aforementioned lifting cylinder through pipelines;

[0012] A second solenoid valve connected to the air inlet and air outlet of the rotary cylinder through pipelines; and

[0013] The pressure-sensitive sensor is arranged on the aforementioned rotating cylinder and is used to sense the downward pressure of the docking joint. The pressure-sensitive sensor can be linked with the aforementioned first solenoid valve.

[0014] The bracket is provided with an adjustment component, the lifting cylinder is provided on the adjustment component, and the adjustment component includes

[0015] A base, arranged on the bracket;

[0016] A first adjusting screw rod is rotatably disposed on the aforementioned base;

[0017] A first adjusting block is disposed on the aforementioned base so as to be laterally movable and has a first screw hole adapted to the aforementioned first adjusting screw rod;

[0018] A second adjusting screw rod is rotatably disposed on the first adjusting block; and

[0019] A second adjusting block is disposed on the first adjusting block so as to be movable forward and backward and has a second screw hole adapted to the second adjusting screw rod;

[0020] The lifting cylinder is arranged on the second adjusting block.

[0021] The first adjusting screw rod and the second adjusting screw rod can realize independent adjustment of the X-axis and the Y-axis, and can quickly match different lines without accurately measuring the differences between different production lines and the consistency between tooling plates.

[0022] To facilitate manual adjustment, the outer end of the first adjusting screw rod is provided with a first adjusting wheel.

[0023] To facilitate manual adjustment, the outer end of the second adjusting screw rod is provided with a second adjusting wheel.

[0024] Preferably, the first solenoid valve is a three-position five-way stop solenoid valve. The second solenoid valve is a two-position five-way solenoid valve.

[0025] The end of the limit groove gradually decreases from the outside to the inside and transitions smoothly. The outer arc design of the bell mouth realizes the smoothness of the valve stem guidance.

[0026] A double linear guide rail crossing device is provided at the power output end of the rotary cylinder, and the double linear guide rail crossing device includes a connecting block;

[0027] An upper connecting plate is arranged at the bottom of the aforementioned connecting block, and a first guide block is arranged at the bottom of the upper connecting plate;

[0028] A middle connecting plate, which is arranged below the upper connecting plate and has an upper end surface with a first guide rail that cooperates with the first guide block, and a lower end surface with a second guide block;

[0029] A lower connecting plate is arranged below the aforementioned middle connecting plate and has a second guide rail on its upper end surface that cooperates with the aforementioned second guide block for guidance; the docking joint is arranged on the lower end surface of the lower connecting plate;

[0030] A first reset member, disposed between the upper connecting plate and the middle connecting plate, and used for resetting the middle connecting plate; and

[0031] A second reset member is provided between the aforementioned middle connecting plate and the lower connecting plate and is used for resetting the lower connecting plate;

[0032] The moving directions of the first guide block and the second guide block are perpendicular to each other.

[0033] The double linear guide rail cross device can realize 360° translation movement of the guide head without dead angle, and is compatible with the offset of the line body, tooling plate and valve stem of ±4mm.

[0034] The first reset member is a spring, or the first reset member includes a first magnet and a second magnet that can magnetically cooperate with the first magnet. The first magnet is arranged on the lower bottom surface of the upper connecting plate, and the second magnet is arranged on the upper end surface of the middle connecting plate.

[0035] Compared with the prior art, the advantages of the utility model are: it replaces manual work, does not require a visual system, has a small overall investment, can realize automated work at low cost, and is convenient and quick to install and debug. The pressure-sensitive sensor provides real-time feedback of the cylinder's downward pressure, and cooperates with the first solenoid valve to achieve controllable and stable downward pressure, which is beneficial to improving the detection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of an embodiment.

[0037] Figure 2 This is an enlarged view of the double linear guide crossing device.

[0038] Figure 3 for Figure 2 Exploded diagram of .

[0039] Figure 4 for Figure 3 Schematic diagram of the structure of the middle butt joint from another perspective.

[0040] Figure 5 It is a three-dimensional cross-sectional view of the butt joint.

[0041] Figure 6 for Figure 3 Schematic diagram of the structure of the middle upper connecting plate from another perspective. DETAILED DESCRIPTION

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] like Figure 1As shown, the stove valve stem online controllable force spinning tooling in this embodiment can detect two valve stems at the same time, specifically including a bracket and two groups of detection components arranged on the bracket, each group of detection components includes a lifting cylinder 2, an adjustment component 6, a rotating cylinder 3, a docking joint 7, a first solenoid valve 51, a second solenoid valve 52 and a pressure-sensitive sensor 31.

[0044] The lifting cylinder 2 is arranged on the bracket 1; specifically, an adjusting component 6 is arranged on the bracket 1, the lifting cylinder 2 is arranged on the adjusting component 6, and the rotating cylinder 3 receives the power output end of the lifting cylinder 2.

[0045] The butt joint 7 is arranged at the power output end of the rotary cylinder 3, and has a concave limit groove 71 at the bottom thereof which is adapted to the valve stem; Figure 4 and Figure 5 As shown, the end of the limit groove 71 gradually decreases from the outside to the inside and the arc transitions smoothly. The outer arc design of the bell mouth realizes the smoothness of the valve stem guidance. When the valve stem contacts the arc surface, the longitudinal force is converted into a lateral force. When the lateral force acts on the double linear guide rail intersection device, the docking head will be displaced, thereby accurately docking the valve stem.

[0046] The first solenoid valve 51 is connected to the air inlet and outlet of the lifting cylinder 2 through a pipeline. In this embodiment, the first solenoid valve 51 is a three-position five-way stop solenoid valve. The second solenoid valve 52 is connected to the air inlet and outlet of the rotating cylinder 3 through a pipeline. The second solenoid valve 52 is a two-position five-way solenoid valve. The first solenoid valve 51 and the second solenoid valve 52 are both connected to the air source 53.

[0047] The pressure-sensitive sensor 31 is disposed on the rotary cylinder 3 to sense the downward pressure of the docking head 7 . The pressure-sensitive sensor 31 can be linked with the first solenoid valve 51 .

[0048] The adjustment assembly 6 in this embodiment includes a base 61, a first adjustment screw 62, a first adjustment block 63, a second adjustment screw (not shown) and a second adjustment block 65. The base 61 is disposed on the bracket 1; the first adjustment screw 62 is rotatably disposed on the base 61.

[0049] The first adjusting block 63 can be laterally moved on the base 61 and has a first screw hole adapted to the first adjusting screw rod 62; the second adjusting screw rod can be rotatably arranged on the first adjusting block 63; the second adjusting block 65 can be moved forward and backward on the first adjusting block 63 and has a second screw hole adapted to the second adjusting screw rod; the lifting cylinder 2 is arranged on the second adjusting block 65.

[0050] The first adjusting screw 62 has a first adjusting wheel 64 at its outer end. The second adjusting screw has a second adjusting wheel 66 at its outer end. A guide rod 67 is provided on the base 61 in a length direction parallel to the first adjusting screw 62, and a guide hole is provided on the first adjusting block 63 to cooperate with the guide rod 67. The guide structure of the second adjusting screw is set with reference to the first adjusting screw. The first adjusting screw and the second adjusting screw can realize independent adjustment of the X-axis and the Y-axis.

[0051] Combination Figure 2 and Figure 3 As shown, the power output end of the rotary cylinder 3 in this embodiment is provided with a double linear guide rail cross device 4, which realizes 360° non-dead angle translation movement of the guide head and is compatible with an offset of ±4mm between the line body, the tooling plate and the valve stem.

[0052] The double linear guide rail crossing device 4 includes a connecting block 41, an upper connecting plate 42, a middle connecting plate 43, a lower connecting plate 44, a first reset member and a second reset member. The connecting block 41 can hold the convex portion 311 of the pressure-sensitive sensor 31 tightly; the upper connecting plate 42 is arranged at the bottom of the connecting block 41 through a screw 81, and the upper connecting plate 42 is provided with a first guide block 45 through the bottom of the screw 82; the middle connecting plate 43 is arranged below the upper connecting plate 42 and has a first guide rail 46 on the upper end surface that cooperates with the first guide block 45 for guidance, and has a second guide block 47 on the lower end surface, and the middle connecting plate 43 and the second guide block 47 of the first guide rail 46 are connected and fixed by a screw 83; the lower connecting plate 44 is arranged below the middle connecting plate 43 and has a second guide rail 48 on the upper end surface that cooperates with the second guide block 47 for guidance through a screw 84; the docking joint 7 is arranged on the lower end surface of the lower connecting plate 44 through a screw 85;

[0053] The first reset member is disposed between the upper connecting plate 42 and the middle connecting plate 43 and is used for resetting the middle connecting plate 43; Figure 6 As shown, the first reset member in this embodiment includes a first magnet 421 and a second magnet 431 that can magnetically cooperate with the first magnet 421. The first magnet 421 is arranged on the lower bottom surface of the upper connecting plate 42, and the second magnet 431 is arranged on the upper end surface of the middle connecting plate 43.

[0054] The second reset member is arranged between the middle connecting plate 43 and the lower connecting plate 44, and is used to reset the lower connecting plate 44; the second reset member also uses magnets to achieve reset, and the specific structure can refer to the first reset member. The first guide block 45 and the second guide block 47 move in perpendicular directions to each other.

[0055] Testing process:

[0056] When the photoelectric switch senses that the gas regulating valve is in place, the first solenoid valve starts to be energized on the left side, and the lifting cylinder moves downward to provide longitudinal force. Through the contact between the joint and the valve stem of the gas regulating valve, part of the longitudinal force is converted into lateral force to drive the double linear guide rail cross device to move according to the product position to complete the docking. When the pressure-sensitive sensor senses that the downward pressure is greater than 25N, the left side of the first solenoid valve is de-energized, and the first solenoid valve is changed to a mid-sealed state to ensure that the cylinder pressure is constant between 25N-40N. The second solenoid valve is energized, and the rotation drives the valve stem to rotate 90 degrees. After completing the 90-degree rotation, it communicates with the detection equipment, starts the detection equipment, and completes the air tightness test. After the air tightness test is completed, the right side of the first solenoid valve is energized, and the lifting cylinder is raised back to the upper limit, and the ground solenoid valve is de-energized. The second solenoid valve is de-energized and rotated back to 0. The double linear guide rail cross device automatically resets after leaving the valve stem by relying on the first reset member and the second reset member, waiting for the next test.

Claims

1. An online controllable force spinning tool for a stove valve stem, characterized in that include Bracket (1); A lifting cylinder (2) is arranged on the aforementioned bracket (1); A rotary cylinder (3) receives the power output of the lifting cylinder (2); A docking joint (7) is arranged at the power output end of the aforementioned rotary cylinder (3), and has a concave limiting groove (71) at the bottom thereof adapted to the valve stem; A first solenoid valve (51) is connected to the air inlet and air outlet of the aforementioned lifting cylinder (2) through pipelines; A second solenoid valve (52) is connected to the air inlet and air outlet of the rotary cylinder (3) through pipelines; and A pressure-sensitive sensor (31) is provided on the aforementioned rotary cylinder (3) and is used to sense the downward pressure of the docking joint (7). The pressure-sensitive sensor (31) can be linked with the aforementioned first electromagnetic valve (51).

2. The on-line controllable force spinning tool for stove valve stem according to claim 1 is characterized in that The bracket (1) is provided with an adjustment component (6), the lifting cylinder (2) is provided on the adjustment component (6), and the adjustment component (6) comprises A base (61) is disposed on the bracket (1); A first adjusting screw rod (62) is rotatably disposed on the aforementioned base (61); A first adjusting block (63) is disposed on the base (61) so as to be laterally movable and has a first screw hole adapted to the first adjusting screw rod (62); A second adjusting screw rod is rotatably disposed on the first adjusting block (63); as well as A second adjusting block (65) is disposed on the first adjusting block (63) so as to be movable forward and backward and has a second screw hole adapted to the second adjusting screw rod; The lifting cylinder (2) is arranged on the second adjusting block (65).

3. The on-line controllable force spinning tool for stove valve stem according to claim 2 is characterized in that The outer end of the first adjusting screw rod (62) is provided with a first adjusting wheel disc (64).

4. The on-line controllable force spinning tool for stove valve stem according to claim 2, characterized in that The outer end of the second adjusting screw rod is provided with a second adjusting wheel disc (66).

5. The on-line controllable force spinning tool for stove valve stem according to claim 2, characterized in that A guide rod (67) is provided on the base (61) in a length direction parallel to the first adjusting screw rod (62), and a guide hole for guiding and cooperating with the guide rod (67) is provided on the first adjusting block (63).

6. The on-line controllable force spinning tool for stove valve stem according to claim 1, characterized in that The first solenoid valve (51) is a three-position five-way stop type solenoid valve.

7. The on-line controllable force spinning tool for stove valve stem according to claim 1, characterized in that The second solenoid valve (52) is a two-position five-way solenoid valve.

8. The on-line controllable force spinning tool for stove valve stem according to claim 1, characterized in that The end of the limiting groove (71) gradually decreases from the outside to the inside and transitions smoothly.

9. The on-line controllable force spinning tool for stove valve stem according to claim 1, characterized in that The power output end of the rotary cylinder (3) is provided with a double linear guide rail cross device (4), and the double linear guide rail cross device (4) comprises Connect block (41); An upper connecting plate (42) is arranged at the bottom of the aforementioned connecting block (41), and a first guide block is arranged at the bottom of the upper connecting plate (42); A middle connecting plate (43) is arranged below the upper connecting plate (42) and has a first guide rail on its upper end surface for guiding and cooperating with the first guide block, and a second guide block on its lower end surface; A lower connecting plate (44) is arranged below the aforementioned middle connecting plate (43) and has a second guide rail on its upper end surface for guiding and cooperating with the aforementioned second guide block; the docking head (7) is arranged on the lower end surface of the lower connecting plate (44); A first reset member is disposed between the upper connecting plate (42) and the middle connecting plate (43) and is used for resetting the middle connecting plate (43); as well as A second reset member is disposed between the middle connecting plate (43) and the lower connecting plate (44) and is used for resetting the lower connecting plate (44); The moving directions of the first guide block and the second guide block are perpendicular to each other.

10. The on-line controllable force spinning tool for stove valve stem according to claim 9, characterized in that The first reset member is a spring, or the first reset member includes a first magnet (421) and a second magnet (431) that can be magnetically matched with the first magnet (421), the first magnet (421) is arranged on the lower bottom surface of the upper connecting plate (42), and the second magnet (431) is arranged on the upper end surface of the middle connecting plate (43).

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