Positioner for pneumatic valve

Abstract

The positioner for the pneumatic valve comprises guide rails, a sliding rod, a positioning rod, a sliding block and a locking mechanism, the guide rails are vertically arranged on the two sides of the valve, the sliding rod is horizontally arranged at the bottommost position of a piston rod of an air cylinder, the positioning rod is transversely arranged between the pair of guide rails and used for abutting against the sliding rod, and the sliding block abuts against the positioning rod. The sliding blocks are arranged at the two ends of the positioning rod and vertically connected to the guide rail in a sliding mode, and the locking mechanism is used for fixing the sliding blocks in the guide rail. The air cylinder has the advantages that the sliding rod is additionally arranged on the piston rod of the air cylinder, the positioning rod with the adjustable height is arranged, control over the telescopic amount of the piston rod is achieved, and therefore the opening degree of the valve is limited, the effect of conveniently adjusting the opening degree of the valve is achieved, and control over the flow of the valve is achieved.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic valves, in particular to a positioner for pneumatic valves. Background Art

[0002] Pneumatic valves are valves driven by compressed air and can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

[0003] When using traditional pneumatic valves, cylinders are usually used to control the lifting of the valve plate to achieve the opening and closing control of the valve. However, traditional pneumatic valves can only achieve full opening and full closing in the opening and closing control, and cannot achieve arbitrary opening adjustment, and cannot achieve valve flow control, which needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a positioner for a pneumatic valve, which has the effect of conveniently adjusting the valve opening.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a positioner for a pneumatic valve, comprising a guide rail, a sliding rod, a positioning rod, a slider and a locking mechanism, wherein the guide rail is vertically arranged on both sides of the valve, the sliding rod is horizontally arranged at the bottommost position of the cylinder piston rod, the positioning rod is transversely arranged between a pair of the guide rails and is used to abut against the sliding rod, the slider is arranged at both ends of the positioning rod and is vertically slidably connected to the guide rail, and the locking mechanism is used to fix the slider in the guide rail.

[0006] In a preferred example, the utility model can be further configured as follows: the locking mechanism includes a locking rod, a pull ring and a tension spring, the locking rod is horizontally slidably connected to the guide rail, a row of locking holes for the locking rod to be inserted into the guide rail is provided on the guide rail, the pull ring is provided at the outer end of the locking rod, the tension spring is provided in the slider, and is used to control the locking rod to be inserted into the locking hole.

[0007] In a preferred example, the present invention can be further configured as follows: the guide rail is provided with digital markings distributed beside the locking hole.

[0008] In a preferred example, the utility model can be further configured as follows: the positioning rod includes a middle tube, a pull rod and a spring, the pull rod is horizontally slidably connected to both ends of the middle tube, and the spring is used to control the pull rod to slide outward.

[0009] In a preferred example, the present invention can be further configured as follows: a reinforcing plate is provided at the middle position of the intermediate pipe.

[0010] In a preferred example, the utility model can be further configured as follows: a clamp is provided at the tail end of the sliding rod.

[0011] In a preferred example, the utility model can be further configured as follows: a baffle plate abutting against a side wall of the valve is arranged on the outer side of the guide rail, a clamping plate located on the back side of the valve is arranged on the baffle plate, and screws are threadedly connected on the clamping plate.

[0012] In a preferred example, the present invention can be further configured as follows: a crossbeam is provided between the upper ends of a pair of guide rails.

[0013] In summary, the utility model has the following beneficial effects:

[0014] 1. By adding a sliding rod to the piston rod of the cylinder and setting a height-adjustable positioning rod, the expansion and contraction amount of the piston rod can be controlled, thereby limiting the opening of the valve, achieving the effect of conveniently adjusting the valve opening and realizing the control of the valve flow;

[0015] 2. By setting and using a positioning rod with adjustable length, it is suitable for pneumatic valves with different spans, thereby improving the practicality of the positioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the installation mechanism of the embodiment;

[0017] Figure 2 is a schematic structural diagram of the guide rail of an embodiment;

[0018] Figure 3 is a schematic structural diagram of a locking mechanism of an embodiment;

[0019] Figure 4 2 is a schematic structural diagram of a positioning rod according to an embodiment of the present invention.

[0020] Figure numerals: 1. guide rail; 11. crossbeam; 12. baffle; 13. splint; 14. screw; 2. sliding rod; 21. clamp; 3. positioning rod; 31. intermediate tube; 32. pull rod; 33. spring; 34. reinforcing plate; 4. slider; 5. locking mechanism; 51. locking rod; 52. pull ring; 53. tension spring; 54. locking hole; 55. digital identification. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1 , Figure 2As shown, a pneumatic valve positioner comprises a guide rail 1, a sliding rod 2, a positioning rod 3, a slider 4 and a locking mechanism 5. The guide rails 1 are vertically arranged on both sides of the valve, and a crossbeam 11 is arranged between the upper ends of a pair of guide rails 1 to limit the pair of guide rails 1 and ensure the accuracy of the guide rails 1 after installation.

[0023] like Figure 1 , Figure 2 As shown, a baffle 12 is arranged on the outer side of the guide rail 1 to abut against the side wall of the valve, a clamping plate 13 is arranged on the baffle 12 and is located on the back side of the valve, and screws 14 are threadedly connected on the clamping plate 13 to realize the rapid disassembly, assembly and replacement of the guide rail 1, and can meet the use requirements of different valves.

[0024] like Figure 1 , Figure 2 As shown, the sliding rod 2 is horizontally arranged at the bottommost position of the cylinder piston rod, and a clamp 21 is arranged at the tail end of the sliding rod 2 to realize the rapid disassembly and assembly of the sliding rod 2.

[0025] like Figure 1 , Figure 2 As shown, the positioning rod 3 is transversely arranged between a pair of guide rails 1 and is used to resist the sliding rod 2. The slider 4 is arranged at both ends of the positioning rod 3 and is vertically slidably connected to the guide rail 1. The locking mechanism 5 is used to fix the slider 4 in the guide rail 1.

[0026] like Figure 2 , Figure 3 As shown, the locking mechanism 5 includes a locking rod 51, a pull ring 52 and a tension spring 53. The locking rod 51 is horizontally slidably connected to the guide rail 1, and a row of locking holes 54 for the locking rod 51 to be inserted into the guide rail 1 is provided. The guide rail 1 is provided with digital markings 55 distributed beside the locking holes 54 to facilitate the determination of the valve opening. The pull ring 52 is provided at the outer end of the locking rod 51, and the tension spring 53 is provided in the slider 4 and is used to control the locking rod 51 to be inserted into the locking hole 54.

[0027] Therefore, when the opening of the valve needs to be adjusted, the pull ring 52 is pulled to drive the locking rod 51 to slide outward, and the locking rod 51 is disengaged from the locking hole 54, so that the vertical sliding of the slider 4 and the positioning rod 3 can be controlled. At this time, the digital mark 55 is observed until the position of the slider 4 is appropriate, and then the pull ring 52 is released, and the locking rod 51 is inserted into the locking hole 54 under the action of the tension spring 53, so that the slider 4 and the positioning rod 3 are fixed. Therefore, when the telescopic rod of the piston drives the sliding rod 2 to move, the positioning rod 3 can block the sliding rod 2 to control the telescopic amount of the piston rod, thereby limiting the opening of the valve, achieving the effect of conveniently adjusting the opening of the valve and controlling the flow of the valve.

[0028] like Figure 2 , Figure 4As shown, the positioning rod 3 includes an intermediate tube 31, a pull rod 32 and a spring 33. The pull rod 32 is horizontally slidably connected to both ends of the intermediate tube 31, and the spring 33 is used to control the pull rod 32 to slide outward. Therefore, by setting and using a positioning rod 3 with adjustable length, it is suitable for pneumatic valves of different spans, thereby improving the practicality of the positioner.

[0029] like Figure 2 , Figure 4 As shown, a reinforcing plate 34 is provided at the middle position of the intermediate pipe 31 to increase the structural strength of the intermediate pipe 31 and prevent the middle position from being damaged by impact, thereby effectively ensuring accurate and precise control of the valve opening.

[0030] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A pneumatic valve positioner, characterized in that: The invention comprises a guide rail (1), a sliding rod (2), a positioning rod (3), a slider (4) and a locking mechanism (5), wherein the guide rail (1) is vertically arranged on both sides of the valve, the sliding rod (2) is horizontally arranged at the bottom of the cylinder piston rod, the positioning rod (3) is horizontally arranged between a pair of the guide rails (1) and is used to abut against the sliding rod (2), the slider (4) is arranged at both ends of the positioning rod (3) and is vertically slidably connected to the guide rail (1), and the locking mechanism (5) is used to fix the slider (4) in the guide rail (1).

2. A pneumatic valve positioner according to claim 1, characterized in that: The locking mechanism (5) comprises a locking rod (51), a pull ring (52) and a tension spring (53); the locking rod (51) is horizontally slidably connected to the guide rail (1); a row of locking holes (54) for the locking rod (51) to be inserted into the guide rail (1); the pull ring (52) is arranged at the outer end of the locking rod (51); the tension spring (53) is arranged in the slider (4) and is used to control the locking rod (51) to be inserted into the locking hole (54).

3. A pneumatic valve positioner according to claim 2, characterized in that: The guide rail (1) is provided with digital markings (55) distributed beside the locking hole (54).

4. A pneumatic valve positioner according to claim 1, characterized in that: The positioning rod (3) comprises an intermediate tube (31), a pull rod (32) and a spring (33); the pull rod (32) is horizontally slidably connected to the two ends of the intermediate tube (31); and the spring (33) is used to control the pull rod (32) to slide outward.

5. A pneumatic valve positioner according to claim 4, characterized in that: A reinforcing plate (34) is provided at the middle of the intermediate tube (31).

6. A pneumatic valve positioner according to claim 1, characterized in that: A clamp (21) is provided at the tail end of the sliding rod (2).

7. A pneumatic valve positioner according to claim 1, characterized in that: The outer side of the guide rail (1) is provided with a baffle (12) which abuts against the side wall of the valve, the baffle (12) is provided with a clamping plate (13) located on the back side of the valve, and the clamping plate (13) is threadedly connected with a screw (14).

8. A pneumatic valve positioner according to claim 1, characterized in that: A crossbeam (11) is arranged between the upper ends of the pair of guide rails (1).

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