Anti-rotation device for valve shaft system

Abstract

The utility model relates to the technical field of valves, and discloses a valve shaft system anti-rotation device which comprises a valve and a valve body arranged below the valve, an anti-rotation mechanism is arranged above the valve, an anti-rotation mechanism is arranged below the anti-rotation mechanism, the anti-rotation mechanism comprises a supporting frame, the outer wall of the supporting frame is connected with a fixing block, and the outer wall of the supporting frame is connected with a rotating shaft. The top end of the fixing block is in threaded connection with a lead screw, the lead screw is driven to rotate by rotating a rotating plate, so that the lead screw moves downwards so as to drive a connecting plate and an extrusion rod to move downwards, the extrusion rod moves to make contact with a stress block and extrude the stress block, and the stress block drives a supporting sliding rod and a limiting plate to move at the moment; at the moment, the limiting grooves in the outer wall of the limiting plate make contact with the protruding strips on the shaft system, then friction limiting is generated, the shaft system can be limited, and therefore the shaft system is prevented from rotating, and the follow-up process is prevented from being influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a valve shafting anti -rotation device. BACKGROUND

[0002] In the modern industrial production system, from petrochemical industry, electric power energy to water supply and drainage, pharmaceutical and many other fields, various fluid conveying systems are everywhere. As an indispensable key component in the fluid conveying system, the valve shoulders the heavy responsibility of accurately controlling the fluid flow, pressure and flow direction. For example, in the pipeline network of petrochemical industry, the valve needs to accurately adjust the conveying amount and conveying direction of various fluids such as crude oil, refined oil and chemical raw materials according to the requirements of different process flows; in the thermal power station, the valve controls the flow of steam, water and other media to ensure the stable operation of the power generation equipment.

[0003] These important equipment are provided with automatic drain valves, which will automatically open to drain after triggering the high liquid level signal. At present, these pneumatic drain valves lack anti-rotation devices in design, and after frequent operation, the shafting (consisting of a driving rod, a shaft coupling, a valve rod and a valve core) rotates to cause the instrument control signal feedback rod to break or detach, resulting in the loss of the valve gas control signal and the inability to perform normal water level adjustment.

[0004] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0005] The basic idea of the technical scheme of the utility model is:

[0006] A valve shafting anti-rotation device, comprising a valve;

[0007] A valve body is arranged below the valve, an anti-rotation mechanism is arranged above the valve, a dismounting mechanism is arranged below the anti-rotation mechanism, and the anti-rotation mechanism comprises a support frame:

[0008] A fixed block is connected to the outer wall of the support frame, a lead screw is threadedly connected to the top end of the fixed block, a rotating plate is connected to the top end of the lead screw, a connecting plate is rotatably connected to the bottom end of the rotating plate, a through slot is formed in the top end of the fixed block, the connecting plate is movably arranged in the inner wall of the through slot, an extrusion rod is connected to the outer wall of the connecting plate, a sliding hole is formed in the outer wall of the support frame, a support sliding rod is movably arranged in the inner wall of the sliding hole, a force receiving block is connected to one end of the support sliding rod, a first spring is connected to the outer wall of one side of the force receiving block, the first spring is connected to the outer wall of the support frame away from the force receiving block, a limiting plate is connected to the end of the support sliding rod away from the force receiving block, a limiting groove is formed in the outer wall of the limiting plate, a shafting is arranged on the valve, and a convex strip is arranged on the outer wall of the shafting.

[0009] As a preferred embodiment of the utility model, the dismounting mechanism comprises a support plate connected to the top of the valve, a sliding groove is formed in the outer wall of one side of the support plate, a second spring is connected to the inner wall of the sliding groove, a positioning rod is connected to the end of the second spring away from the inner wall of the sliding groove, a pull plate is connected to the outer wall of one end of the positioning rod, a positioning hole is formed in the outer wall of the support frame, and the positioning rod is connected to the inner wall of the positioning hole.

[0010] As a preferred embodiment of the utility model, the number of convex strips is several, and the convex strips are uniformly and equidistantly distributed on the outer wall of the shaft system.

[0011] As a preferred embodiment of the utility model, the inner wall of the limiting groove is slightly smaller than the outer wall of the convex strip, and the convex strip is made of rubber material.

[0012] As a preferred embodiment of the utility model, the number of limiting plates is two, and the limiting plates are symmetrically distributed on the outer walls of the two sides of the shaft system.

[0013] As a preferred embodiment of the utility model, the number of positioning rods is two, and the positioning rods are symmetrically distributed on the left and right sides of the support plate.

[0014] As a preferred embodiment of the utility model, a stress inclined surface is formed in the end of the positioning rod away from the pull plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses a rotating rotating plate drives a screw rod to rotate, moves downward, drives a connecting plate and an extruding rod to move downward, contacts and extrudes a stress block through the movement of the extruding rod, the stress block moves the support slide rod and the limiting plate at the moment, the limiting groove on the outer wall of the limiting plate contacts the convex strip on the shaft system at the moment, then generates friction limiting, so that the shaft system is limited, thereby preventing the shaft system from rotating and affecting the subsequent process.

[0017] The utility model discloses a rotating rotating plate drives a screw rod to rotate, moves downward, drives a connecting plate and an extruding rod to move downward, contacts and extrudes a stress block through the movement of the extruding rod, the stress block moves the support slide rod and the limiting plate at the moment, the limiting groove on the outer wall of the limiting plate contacts the convex strip on the shaft system at the moment, then generates friction limiting, so that the shaft system is limited, thereby preventing the shaft system from rotating and affecting the subsequent process.

[0018] The specific embodiments of the utility model will be further described in detail in combination with the drawings. DRAWINGS

[0019] In the drawings:

[0020] Figure 1 It is whole structure schematic view of the utility model;

[0021] Figure 2 It is bottom end view structure schematic view of the utility model;

[0022] Figure 3 It is anti-rotation mechanism structure schematic view of the utility model;

[0023] Figure 4 It is anti-rotation mechanism partial structure schematic view of the utility model;

[0024] Figure 5 It is dismounting mechanism structure schematic view of the utility model.

[0025] In the drawings: 1, valve;2, valve body;31, anti-rotation mechanism;311, support frame;312, fixed block;313, screw;314, rotating plate;315, connecting plate;316, extrusion rod;317, support slide rod;318, stress block;319, first spring;3110, limiting plate;3111, limiting recess;3112, shafting;3113, convex strip;32, dismounting mechanism;321, support plate;322, positioning rod;323, second spring;324, pull plate;325, positioning hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme in the embodiments will be described clearly and completely with reference to the drawings in the embodiments of the utility model below, and the following embodiments are used to illustrate the utility model.

[0027] As Figures 1 to 5As shown, a valve shaft anti-rotation device, comprising a valve 1, a valve body 2 arranged below the valve 1, an anti-rotation mechanism 31 arranged above the valve 1, a dismounting mechanism 32 arranged below the anti-rotation mechanism 31, the anti-rotation mechanism 31 comprising a support frame 311, a fixed block 312 connected to the outer wall of the support frame 311, a lead screw 313 threadedly connected to the top end of the fixed block 312, a rotating plate 314 connected to the top end of the lead screw 313, a connecting plate 315 rotatably connected to the bottom end of the rotating plate 314, a through slot formed in the top end of the fixed block 312, the connecting plate 315 movably arranged on the inner wall of the through slot, an extrusion rod 316 connected to the outer wall of the connecting plate 315, a sliding hole formed in the outer wall of the support frame 311, a support sliding rod 317 movably arranged on the inner wall of the sliding hole, a force receiving block 318 connected to one end of the support sliding rod 317, a first spring 319 connected to the outer wall of one side of the force receiving block 318, the first spring 319 connected to the outer wall of the support frame 311 away from the force receiving block 318, a limiting plate 3110 connected to the end of the support sliding rod 317 away from the force receiving block 318, a limiting groove 3111 formed in the outer wall of the limiting plate 3110, a shaft system 3112 arranged on the valve 1, and a convex strip 3113 arranged on the outer wall of the shaft system 3112.

[0028] Further, the number of convex strips 3113 is several, and they are uniformly and equidistantly distributed on the outer wall of the shaft system 3112, so as to realize all-round friction limiting effect on the outer wall of the shaft system 3112, and further improve the anti-rotation.

[0029] Further, the inner wall of the limiting groove 3111 is slightly smaller than the outer wall of the convex strip 3113, and the material of the convex strip 3113 is rubber, so that the outer wall of the convex strip 3113 will be filled in the inner wall of the limiting groove 3111, thereby increasing the friction between them and improving the friction stability.

[0030] Further, the number of limiting plates 3110 is two, and the limiting plates 3110 are symmetrically arranged on the outer walls of the two sides of the shaft system 3112, so as to realize close contact with the outer wall of the shaft system 3112, thereby increasing the friction and preventing rotation.

[0031] The dismounting mechanism 32 comprises a support plate 321 connected to the top of the valve 1, a sliding groove formed in the outer wall of one side of the support plate 321, a second spring 323 connected to the inner wall of the sliding groove, a positioning rod 322 connected to the end of the second spring 323 away from the inner wall of the sliding groove, a pull plate 324 connected to the outer wall of one end of the positioning rod 322, a positioning hole 325 formed in the outer wall of the support frame 311, and the positioning rod 322 clamped in the inner wall of the positioning hole 325.

[0032] Further, the number of positioning rods 322 is two, and the positioning rods 322 are symmetrically arranged on the left and right sides of the support plate 321, so as to realize synchronous and uniform support effect on the left and right sides of the support frame 311, thereby ensuring the installation stability.

[0033] Further, the positioning rod 322 is provided with a stress inclined surface away from one end of the pull plate 324, which can be extruded by the extrusion rod 316, so as to move and facilitate subsequent installation.

[0034] The implementation principle of the valve shaft anti-rotation device of the embodiment is as follows: when the shaft system 3112 needs to be prevented from rotating, first, the rotating plate 314 is rotated to drive the screw rod 313 to rotate, at this time, the screw rod 313 rotates to move downward on the fixed block 312, and the connecting plate 315 moves downward to drive the extrusion rod 316 to move downward, and the extrusion rod 316 continuously moves downward to contact and extrude the stress block 318, the stress block 318 is extruded to move inward, and the first spring 319 is extruded and compressed in the movement process, at this time, the stress block 318 moves to drive the supporting slide rod 317 to move, and then the supporting slide rod 317 drives the two limiting plates 3110 to approach each other, and then contacts the outer wall of the shaft system 3112, and the limiting groove 3111 and the convex strip 3113 on the outer wall of the limiting plate 3110 are extruded to rub each other, so as to rub and limit the shaft system 3112, thereby preventing the shaft system 3112 from rotating and affecting the subsequent process, and conversely, when it is needed to rotate, the rotating plate 314 is reversed to make the extrusion rod 316 extrude the stress block 318, and then the first spring 319 rebounds to make the two limiting plates 3110 move away from each other, so as to extrude and rub the outer wall of the shaft system 3112.

[0035] When the supporting frame 311 needs to be installed, first, the supporting frame 311 is sleeved on the outer wall of the shaft system 3112 and then moves downward, at this time, the bottom of the supporting frame 311 contacts and extrudes the inclined surface on the positioning rod 322 in the movement process, the positioning rod 322 is extruded to move, and the second spring 323 is extruded in the movement process, when the positioning hole 325 on the outer wall of the supporting plate 321 moves to the position of the positioning rod 322, the second spring 323 rebounds to push the positioning rod 322 to reset and be clamped in the inner wall of the positioning hole 325, the clamping is completed, and when disassembled, the pull plate 324 is pulled outward to drive the positioning rod 322 to move, so that the outer wall is separated from the inner wall of the positioning hole 325, and the disassembly is completed, the installation mode can be quickly disassembled, without using bolts and nuts, and the disassembly efficiency is improved.

Claims

1. A valve shaft anti-rotation device, comprising a valve (1); Valve body (2) arranged below the valve (1), characterized in that An anti-rotation mechanism (31) is arranged above the valve (1), and a dismounting mechanism (32) is arranged below the anti-rotation mechanism (31); the anti-rotation mechanism (31) comprises a support frame (311); A fixed block (312) is connected to the outer wall of the support frame (311), a lead screw (313) is threadedly connected to the top end of the fixed block (312), a rotating plate (314) is connected to the top end of the lead screw (313), a connecting plate (315) is rotatably connected to the bottom end of the rotating plate (314), a through slot is formed in the top end of the fixed block (312), the connecting plate (315) is movably arranged on the inner wall of the through slot, an extrusion rod (316) is connected to the outer wall of the connecting plate (315), a sliding hole is formed in the outer wall of the support frame (311), a support sliding rod (317) is movably arranged on the inner wall of the sliding hole, a force receiving block (318) is connected to one end of the support sliding rod (317), a first spring (319) is connected to the outer wall of one side of the force receiving block (318), the first spring (319) is connected to the outer wall of the support frame (311) at the end away from the force receiving block (318), a limiting plate (3110) is connected to the end of the support sliding rod (317) away from the force receiving block (318), a limiting groove (3111) is formed in the outer wall of the limiting plate (3110), and a shaft system (3112) is arranged on the valve (1) and provided with a protruding strip (3113) on the outer wall.

2. A valve shaft anti-rotation device according to claim 1, wherein The dismounting mechanism (32) comprises a support plate (321) connected to the top of the valve (1), a sliding groove is formed in the outer wall of one side of the support plate (321), a second spring (323) is connected to the inner wall of the sliding groove, a positioning rod (322) is connected to the end of the second spring (323) away from the inner wall of the sliding groove, a pull plate (324) is connected to the outer wall of one end of the positioning rod (322), a positioning hole (325) is formed in the outer wall of the support frame (311), and the positioning rod (322) is clamped in the inner wall of the positioning hole (325).

3. A valve shaft anti-rotation device according to claim 1, wherein The number of the protruding strips (3113) is several, and the protruding strips (3113) are uniformly and equidistantly distributed on the outer wall of the shaft system (3112).

4. A valve shaft anti-rotation device according to claim 1, wherein The inner wall of the limiting groove (3111) is slightly smaller than the outer wall of the protruding strip (3113), and the protruding strip (3113) is made of rubber material.

5. A valve shaft anti-rotation device according to claim 1, wherein The number of the limiting plates (3110) is two, and the limiting plates (3110) are symmetrically arranged on the outer walls of the two sides of the shaft system (3112).

6. A valve shaft anti-rotation device according to claim 2, wherein The number of the positioning rods (322) is two, and the positioning rods (322) are symmetrically arranged on the left and right sides of the support plate (321).

7. A valve shaft anti-rotation device according to claim 2, wherein A force receiving inclined surface is formed in the end of the positioning rod (322) away from the pull plate (324).

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