Positioning tool for maintenance of four-way valve

Abstract

The utility model discloses a positioning tool for maintenance of a four-way valve. The positioning tool comprises a workbench, and positioning mechanisms are arranged on the periphery of the workbench. The positioning mechanism comprises a supporting table connected to the workbench, an air cylinder is installed on the supporting table, the telescopic end of the air cylinder is rotationally connected with a positioning sleeve, a rotating shaft is rotationally connected into the positioning sleeve, a driving mechanism for driving the rotating shaft to rotate is arranged on the positioning sleeve, a rotating wheel is connected to the lower portion of the rotating shaft, and a plurality of protrusions are arranged on the periphery of the rotating wheel. A plurality of grooves are formed in the outer wall of the positioning sleeve, a clamping plate is arranged in each groove, a sliding rod is fixedly connected to the inner side of each clamping plate, a sleeve is connected to the inner wall, located at the corresponding groove, of the positioning sleeve, the sliding rods are slidably connected into the sleeves, and balls matched with the protrusions are connected to the inner ends of the sliding rods. The rotating shaft is controlled to rotate according to the inner diameter of a pipe opening of the four-way valve, the rotating shaft drives the rotating wheel to rotate, the rotating wheel extrudes the ball through the protrusion and drives the sliding rod to slide outwards in the sleeve, and therefore the clamping plates are driven to move outwards to adapt to four-way valves with different pipe diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of four-way valves, in particular to a positioning tool for repairing four-way valves. Background Art

[0002] A four-way valve is a valve device with four ports, one inlet and three outlets. When repairing a four-way valve, a positioning tool is required to keep it stable.

[0003] Currently, most four-way valves are positioned by inserting positioning sleeves into the four pipe openings of the four-way valve. However, the current four-way valve positioning tooling has the following problems: (1) Due to the different pipe diameters of four-way valves, the current positioning tooling cannot adapt to four-way valves of different pipe diameters, and its adaptability is low; (2) After the top surface of the four-way valve is repaired, if the bottom surface of the four-way valve needs to be repaired, the four positioning sleeves need to be removed from the four pipe openings one by one to flip the four-way valve, resulting in low efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a positioning tool for repairing a four-way valve to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A positioning tool for repairing a four-way valve comprises a workbench with positioning mechanisms provided on all four sides of the workbench; the positioning mechanism comprises a support platform connected to the workbench, a cylinder is installed on the support platform, the telescopic end of the cylinder is rotatably connected to a positioning sleeve through a rotary bearing, a rotating shaft is rotatably connected on the center line of the positioning sleeve, a driving mechanism for driving the rotating shaft to rotate is provided on the positioning sleeve, a rotating wheel is fixedly connected to the lower part of the rotating shaft, a plurality of arc-shaped protrusions with gradually increasing thickness are provided on the periphery of the rotating wheel, a plurality of grooves are provided on the outer wall of the positioning sleeve, an arc-shaped splint is provided in each groove, a sliding rod is fixedly connected to the inner side of the splint, the inner wall of the positioning sleeve at the groove is connected to a sleeve, the sliding rod is slidably connected to the sleeve, and the inner end of the sliding rod is connected to a sphere that cooperates with the protrusion.

[0007] Preferably, the driving mechanism includes a transmission rod rotatably connected to the positioning sleeve, a handle connected to the outer end of the transmission rod, a first bevel gear connected to the inner end of the transmission rod, and a second bevel gear connected to the upper end of the rotating shaft, and the first bevel gear is meshed with the second bevel gear.

[0008] In the above technical solution, the handle is rotated to drive the transmission rod to rotate. During the rotation of the transmission rod, the first bevel gear and the second bevel gear cooperate to drive the rotating shaft to rotate, thereby driving the rotating wheel to rotate.

[0009] Preferably, the positioning sleeve is provided with a plurality of screw holes on the periphery of the transmission rod, the handle is provided with a positioning hole, a screw is inserted into the positioning hole, and the screw is threadedly connected to the screw hole.

[0010] According to the above technical solution, when the handle is rotated to the desired position, the screw is inserted into the positioning hole and threadedly connected to the screw hole, thereby completing the fixation of the handle.

[0011] Preferably, the outer wall of the rotating shaft located inside the sleeve is connected to a slide plate, the slide plate is connected to a spring, and the outer end of the spring is connected to the inner wall of the sleeve.

[0012] In the above technical solution, when the protrusion squeezes the sphere, it pushes the slide rod to slide outward. The slide rod squeezes the spring through the slide plate, causing the spring to be in a contracted state. When the protrusion leaves the sphere, the slide plate is pushed inward under the action of the spring, so that the splint is hidden in the groove.

[0013] Preferably, the highest point of the protrusion is connected to a limiting block extending toward the positioning sleeve.

[0014] The above technical solution blocks the ball by the limit block, thereby preventing the ball from falling when it reaches the highest point of the protrusion, and is used to prevent the wheel from rotating excessively.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) According to the inner diameter of the four-way valve pipe orifice, the rotation of the shaft is controlled by the driving mechanism. During the rotation of the shaft, the wheel is driven to rotate. The wheel gradually squeezes the ball through the protrusion, driving the slide rod to slide outward in the sleeve, thereby driving the splint to move outward to adapt to four-way valves with different pipe diameters, thereby improving adaptability.

[0017] (2) First, fix one pipe opening of the four-way valve on a positioning sleeve of a positioning mechanism, and then start the four cylinders to drive the four sets of positioning sleeves to be inserted into the four pipe openings, thereby completing the fixation of the four-way valve. When the bottom surface needs to be inspected, only the two opposite positioning sleeves need to be pulled out from the pipe openings to rotate the four-way valve. There is no need to pull out all the positioning sleeves from the pipe openings, which improves maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the utility model;

[0019] Figure 2 It is a top sectional view of the positioning sleeve;

[0020] Figure 3 It is a cross-sectional view of the splint hidden in the groove;

[0021] Figure 4 This is a cross-sectional view after the splint is moved out of the groove;

[0022] In the figure: 1-workbench, 2-support table, 3-cylinder, 4-rotary bearing, 5-positioning sleeve, 6-rotating shaft, 7-rotating wheel, 8-protrusion, 9-groove, 10-clamp, 11-sliding rod, 12-sleeve, 13-ball, 14-transmission rod, 15-handle, 16-first bevel gear, 17-second bevel gear, 18-screw hole, 19-screw, 20-slide plate, 21-spring, 22-limit block, 23-four-way valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1-4 A positioning tool for repairing a four-way valve includes a workbench 1, and positioning mechanisms are provided on all four sides of the workbench 1; the positioning mechanism includes a support platform 2 connected to the workbench, a cylinder 3 is installed on the support platform 2, the telescopic end of the cylinder 3 is rotatably connected to a positioning sleeve 5 through a rotary bearing 4, a rotating shaft 6 is rotatably connected on the center line inside the positioning sleeve 5, and a driving mechanism for driving the rotating shaft 6 to rotate is provided on the positioning sleeve 5. Specifically, the driving mechanism includes a transmission rod 14 rotatably connected to the positioning sleeve, a handle 15 connected to the outer end of the transmission rod, a first bevel gear 16 connected to the inner end of the transmission rod, and a second bevel gear 17 connected to the upper end of the rotating shaft, and the first bevel gear 16 is meshed with the second bevel gear 17. Rotating the handle 15 drives the transmission rod 14 to rotate, and during the rotation of the transmission rod 14, the rotating shaft 6 is driven to rotate through the cooperation of the first bevel gear 16 and the second bevel gear 17.

[0026] The lower part of the rotating shaft 6 is fixedly connected to a rotating wheel 7, and the periphery of the rotating wheel 7 is provided with a plurality of arc-shaped protrusions 8 with gradually increasing thickness. The outer wall of the positioning sleeve 5 is provided with a plurality of grooves 9, and each groove 9 is provided with an arc-shaped clamping plate 10. The inner side of the clamping plate 10 is fixedly connected to a sliding rod 11. The inner wall of the positioning sleeve 5 located at the groove is connected to a sleeve 12. The sliding rod 11 is slidably connected to the sleeve 12. The inner end of the sliding rod 11 is connected to a ball 13 that cooperates with the protrusion 8. By rotating the rotating wheel 7, the protrusion 8 is driven to rotate. During the rotation of the protrusion 8, the ball 13 is squeezed, thereby pushing the sliding rod 11 to push the clamping plate 10 outward.

[0027] The positioning sleeve 5 is provided with a plurality of screw holes 18 on the periphery of the transmission rod. The handle 15 is provided with a positioning hole, into which a screw rod 19 is inserted and threadedly engaged with the screw hole 18. When the handle 15 is rotated to the desired position, the screw rod 19 is inserted into the positioning hole and threadedly engaged with the screw hole 18, thereby securing the handle 15 and preventing the rotation of the rotating shaft 6 and, consequently, the movement of the protrusion 8, thereby maintaining the stability of the slide rod 11 and the clamping plate 10. It should be noted that the screw holes are sufficiently numerous and distributed circumferentially to allow the handle to be positioned in a variety of positions.

[0028] The outer wall of the rotating shaft 6 located inside the sleeve is connected to a slide plate 20, and a spring 21 is connected to the slide plate 20. The outer end of the spring 21 is connected to the inner wall of the sleeve 12. When the protrusion 8 squeezes the ball 13, it pushes the slide bar 11 to slide outward. The slide bar 11 squeezes the spring 21 through the slide plate 20, causing the spring 21 to be in a contracted state. When the protrusion 8 leaves the ball 13, the spring 21 pushes the slide plate 20 inward, so that the splint 10 is hidden in the groove 9.

[0029] The working principle of this embodiment is:

[0030] According to the inner diameter of the pipe orifice of the four-way valve 23, the rotation of the rotating shaft 6 is controlled by the driving mechanism. During the rotation of the rotating shaft 6, the rotating wheel 7 is driven to rotate. The rotating wheel 7 gradually squeezes the ball 13 through the protrusion 8, driving the slide rod 11 to slide outward in the sleeve 12, thereby driving the splint 10 to move outward to adapt to four-way valves of different pipe diameters. Then, one pipe orifice of the four-way valve is first fixed on a group of positioning sleeves 5 of the positioning mechanism, and then the four cylinders 3 are controlled to extend, driving the four groups of positioning sleeves 5 to be inserted into the four pipe orifices, thereby completing the fixation of the four-way valve. When the bottom surface needs to be inspected, it is only necessary to pull out the two opposite positioning sleeves 5 from the pipe orifices to rotate the four-way valve. There is no need to pull out all the positioning sleeves from the pipe orifices, which improves maintenance efficiency.

[0031] When the positioning sleeve needs to be removed, the handle is rotated in the opposite direction to drive the protrusion away from the sphere.

[0032] Example 2

[0033] Based on Example 1, the highest point of the protrusion 8 is connected to a limit block 22 extending toward the positioning sleeve. The limit block 22 blocks the ball 13, thereby preventing the ball 13 from falling when it reaches the highest point of the protrusion 8, thereby preventing the wheel 7 from rotating excessively.

[0034] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning tool for repairing a four-way valve, characterized by: The invention comprises a workbench (1), wherein positioning mechanisms are arranged on all four sides of the workbench (1); the positioning mechanism comprises a support platform (2) connected to the workbench, a cylinder (3) is installed on the support platform (2), a telescopic end of the cylinder (3) is rotatably connected to a positioning sleeve (5) through a rotary bearing (4), a rotating shaft (6) is rotatably connected to the center line of the positioning sleeve (5), a driving mechanism for driving the rotating shaft (6) to rotate is arranged on the positioning sleeve (5), a rotating wheel (7) is fixedly connected to the lower part of the rotating shaft (6), and the rotating wheel (7) is fixedly connected to the lower part of the rotating shaft (6). The periphery of the wheel (7) is provided with a plurality of arc-shaped protrusions (8) with gradually increasing thickness, the outer wall of the positioning sleeve (5) is provided with a plurality of grooves (9), each groove (9) is provided with an arc-shaped splint (10), the inner side of the splint (10) is fixedly connected with a slide rod (11), the inner wall of the positioning sleeve (5) located at the groove is connected with a sleeve (12), the slide rod (11) is slidably connected in the sleeve (12), and the inner end of the slide rod (11) is connected with a ball (13) that matches the protrusion (8).

2. A positioning tool for repairing a four-way valve according to claim 1, characterized in that: The driving mechanism comprises a transmission rod (14) rotatably connected to the positioning sleeve, a handle (15) connected to the outer end of the transmission rod, a first bevel gear (16) connected to the inner end of the transmission rod, and a second bevel gear (17) connected to the upper end of the rotating shaft, wherein the first bevel gear (16) is meshed with the second bevel gear (17).

3. A positioning tool for repairing a four-way valve according to claim 2, characterized in that: The positioning sleeve (5) is provided with a plurality of screw holes (18) on the periphery of the transmission rod, and the handle (15) is provided with a positioning hole, in which a screw rod (19) is inserted, and the screw rod (19) is threadedly connected to the screw hole (18).

4. A positioning tool for repairing a four-way valve according to claim 3, characterized in that: The outer wall of the rotating shaft (6) located inside the sleeve is connected to a slide plate (20), the slide plate (20) is connected to a spring (21), and the outer end of the spring (21) is connected to the inner wall of the sleeve (12).

5. A positioning tool for repairing a four-way valve according to claim 4, characterized in that: The highest point of the protrusion (8) is connected to a limiting block (22) extending in the direction of the positioning sleeve.

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