Butterfly valve with valve disc limiting structure

Abstract

The utility model relates to the technical field of valves, and discloses a butterfly valve with a valve disc limiting structure, which comprises a valve body, a valve plate is movably mounted in the valve body, a rotating shaft is fixedly mounted in the middle of the valve plate, an execution box is fixedly mounted on the valve body, and the upper end of the rotating shaft extends into the execution box and is fixedly provided with a worm gear. A fixing sleeve is fixedly installed on one side of the execution box, a plurality of first limiting tooth blocks are fixedly installed on the outer surface of the end, away from the execution box, of the fixing sleeve, and a worm is rotationally installed in the execution box and close to the worm gear. A fixing sleeve is arranged on one side of the execution box, a plurality of first limiting tooth blocks are annularly arranged on the outer side of the fixing sleeve, an inserting sleeve is further arranged at one end of the fixing sleeve, and a plurality of second limiting tooth blocks are annularly arranged on the inner side of the inserting sleeve. And the multiple second limiting tooth blocks are meshed with the first limiting tooth blocks, so that the axial movement of the worm can be limited.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a butterfly valve with valve disc limiting structure. BACKGROUND

[0002] The butterfly valve is a throttle valve, and is an important device in a water supply and drainage pipeline system, a closing piece of the butterfly valve is a disc, rotates around a valve shaft to achieve the purpose of opening and closing, and is mainly used for cutting off and throttling fluid medium in a pipeline.

[0003] The valve plate of the butterfly valve is generally controlled to open and close through rotation, rotates around the valve shaft, when it is needed to open the valve, the valve plate is rotated to a position consistent with the pipeline flow direction, so that the medium can pass through smoothly, when it is needed to close the valve, the valve plate is rotated to a position perpendicular to the pipeline flow direction, and the medium flow is cut off, and in the process of controlling the opening and closing of the valve plate through the combination of the worm gear and the worm structure, the existing butterfly valve is provided with a hand wheel at one end of the worm, so that the rotation of the worm is facilitated, but when the impact force of the water flow on the valve plate is too large, the valve plate may be accidentally rotated, and the unstable rotation of the valve plate may interfere with the stability of the whole fluid control system, so that the flow control is inaccurate or the system fails. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a butterfly valve with valve disc limiting structure, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model takes the technical scheme that:

[0006] A butterfly valve with valve disc limiting structure, including valve body, the valve body is installed with valve plate, the valve plate is fixedly installed with rotating shaft in the middle, the valve body is fixedly installed with execution box, and the rotating shaft extends to the execution box and is fixedly installed with worm gear, one side of the execution box is fixedly installed with fixed sleeve, the outer surface of the one end of the fixed sleeve away from the execution box is fixedly installed with a plurality of first limiting tooth blocks, the execution box is rotatably installed with worm gear near the worm gear, and one end of the worm gear is meshed with the worm gear, the other end of the worm gear extends to the fixed sleeve through the execution box, one end of the fixed sleeve near the first limiting tooth block is rotatably installed with plug sleeve, one end of the plug sleeve is fixedly installed with hand wheel, and the plug sleeve is fixedly installed with transmission shaft.

[0007] As a further preferred embodiment of this utility model, a plurality of first limiting teeth are arranged in a ring along the outer surface of the fixed sleeve. A bidirectional guide slope is provided on one side of each first limiting tooth. A limiting screw is also threadedly connected inside the fixed sleeve near the first limiting teeth, and one end of the limiting screw extends into the fixed sleeve. A fixed sleeve is fixedly installed on one side of the execution box, and a plurality of first limiting teeth are provided on the outside of the fixed sleeve, which can provide conditions for limiting the axial movement of the insert and the worm gear.

[0008] As a further preferred embodiment of this utility model, a rectangular telescopic groove is provided at one end of the worm gear.

[0009] As a further preferred embodiment of the present invention, a slot is provided at one end of the socket, a rectangular mounting groove is provided in the middle of one side of the slot, and a plurality of second limiting teeth are fixedly installed on the inner side of the slot, and the plurality of second limiting teeth are arranged in a ring along the inner side of the slot.

[0010] As a further preferred embodiment of this utility model, a first insert rod is fixedly installed at one end of the drive shaft, and a second insert rod is fixedly installed at the other end of the drive shaft. The second insert rod has an annular limiting groove. The first insert rod is inserted into a rectangular mounting groove and fixed with screws. One end of the drive shaft is inserted into a fixed sleeve, and one end of the second insert rod is inserted into a rectangular telescopic groove. One end of the limiting screw is located in the limiting groove, and the second limiting tooth block is inserted between two of the first limiting tooth blocks. After the insert sleeve is inserted into the outside of the fixed sleeve, the second insert rod at one end of the drive shaft is inserted into the rectangular telescopic groove inside the insert sleeve, so that the worm can be driven to rotate by a handwheel. The mutual meshing of the second limiting tooth block and the first limiting tooth block can restrict the axial movement of the insert sleeve, thereby restricting the axial movement of the worm.

[0011] As a further preferred embodiment of this utility model, a compression spring is fitted on the outer side of the second insertion rod, one end of the compression spring abutting against one end of the transmission shaft, and the other end of the compression spring abutting against one end of the worm gear.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this utility model, a fixed sleeve is provided on one side of the actuator box, and multiple first limiting teeth are arranged in a ring on the outside of the fixed sleeve. A plug sleeve is also provided at one end of the fixed sleeve, and multiple second limiting teeth are arranged in a ring on the inside of the plug sleeve. With the cooperation of the transmission shaft, the first plug rod and the second plug rod, the multiple second limiting teeth can mesh with the first limiting teeth without operating the handwheel, which can restrict the axial movement of the worm. Furthermore, since one end of the worm is meshed with the worm wheel, the axial movement of the rotating shaft inside the valve plate is restricted. At the same time, the push-type handwheel makes it easy to release the plug sleeve and rotate the worm. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the main body structure schematic view of the utility model;

[0015] Figure 2 It is the fixed sleeve and worm, insert sleeve, hand wheel sectional view of the utility model;

[0016] Figure 3 It is Figure 2 The enlarged view in A place;

[0017] Figure 4 It is the fixed sleeve and worm, insert sleeve, hand wheel split structure schematic view of the utility model;

[0018] Figure 5 It is Figure 4 The enlarged view in B place.

[0019] In the drawing: 1, valve body;2, valve plate;3, rotating shaft;4, execution box;5, worm wheel;6, fixed sleeve;7, first limit tooth block;8, worm;9, insert sleeve;10, hand wheel;11, limit slot;12, insert slot;13, transmission shaft;14, guide inclined plane;15, limit screw;16, rectangular expansion slot;17, rectangular installation slot;18, second limit tooth block;19, first insert rod;20, second insert rod;21, compression spring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0021] As Figures 1-5 Indicated, the utility model provides a butterfly valve with valve disc limit structure, including valve body 1, the valve plate 2 is movably installed in valve body 1, the rotating shaft 3 is fixedly installed in the middle part of valve plate 2, the execution box 4 is fixedly installed on valve body 1, and the worm wheel 5 is fixedly installed on the upper end of rotating shaft 3 and extends into execution box 4, the fixed sleeve 6 is fixedly installed on one side of execution box 4, a plurality of first limit tooth blocks 7 are fixedly installed on the outer surface of the end of fixed sleeve 6 away from execution box 4, the worm 8 is rotatably installed in execution box 4 close to worm wheel 5, and one end of worm 8 is meshed and connected with worm wheel 5, the other end of worm 8 extends into fixed sleeve 6 through execution box 4, the insert sleeve 9 is movably installed on one end of fixed sleeve 6 close to first limit tooth block 7, the hand wheel 10 is fixedly installed on one end of insert sleeve 9, and the transmission shaft 13 is fixedly installed in insert sleeve 9.

[0022] As Figures 2-5As shown, a plurality of first limiting tooth blocks 7 are arranged annularly along the outer surface of the fixed sleeve 6, and a bidirectional guide slope 14 is formed on one side of the first limiting tooth block 7. A limiting screw 15 is threadedly connected to the fixed sleeve 6 near the first limiting tooth block 7, and one end of the limiting screw 15 extends into the fixed sleeve 6. The fixed sleeve 6 is fixedly installed on one side of the execution box 4, and a plurality of first limiting tooth blocks 7 are arranged on the outer side of the fixed sleeve 6, which can provide conditions for limiting the axial movement of the plug sleeve 9 and the worm 8. A rectangular expansion slot 16 is formed on one end of the worm 8.

[0023] As shown in the figure, Figures 2-5 A plug slot 12 is formed on one end of the plug sleeve 9, a rectangular mounting slot 17 is formed in the middle of one side of the plug slot 12, a plurality of second limiting tooth blocks 18 are fixedly installed on the inner side of the plug slot 12, and the second limiting tooth blocks 18 are arranged annularly along the inner side of the plug slot 12. A first plug rod 19 is fixedly installed on one end of the transmission shaft 13, and a second plug rod 20 is fixedly installed on the other end of the transmission shaft 13. An annular limiting slot 11 is formed on the second plug rod 20. The first plug rod 19 is inserted into the rectangular mounting slot 17 and fixed by a screw. One end of the transmission shaft 13 is inserted into the fixed sleeve 6, and one end of the second plug rod 20 is inserted into the rectangular expansion slot 16. One end of the limiting screw 15 is located in the limiting slot 11, and the second limiting tooth block 18 is inserted between two first limiting tooth blocks 7. After the plug sleeve 9 is inserted into the outer side of the fixed sleeve 6, the second plug rod 20 at one end of the transmission shaft 13 is inserted into the rectangular expansion slot 16, so that the worm 8 can be driven to rotate by the hand wheel 10. The mutual engagement of the second limiting tooth block 18 and the first limiting tooth block 7 can limit the axial movement of the plug sleeve 9, thereby limiting the axial movement of the worm 8. The outer side of the second plug rod 20 is sleeved with a compression spring 21, one end of the compression spring 21 abuts against one end of the transmission shaft 13, and the other end of the compression spring 21 abuts against one end of the worm 8.

[0024] It needs explanation, the utility model discloses a butterfly valve with valve disc limiting structure, when needing to rotate valve plate 2, can hold hand wheel 10 with both hands, and push hand wheel 10 to the direction of execution box 4, then, hand wheel 10 drives insert sleeve 9 to move through insert groove 12 at one end of fixed sleeve 6, and make multiple second limiting tooth blocks 18 in the inside of insert sleeve 9 from the disengagement between corresponding two first limiting tooth blocks 7, and the groove body at the inside of insert groove 12 close to second limiting tooth block 18 is placed at the outside of first limiting tooth block 7, synchronously, insert sleeve 9 drives second insert rod 20 to move in rectangular telescopic groove 16 through transmission shaft 13, then, can rotate hand wheel 10, just can make hand wheel 10 drive insert sleeve 9 to rotate, and insert sleeve 9 drives second insert rod 20 to rotate in rectangular telescopic groove 16 through transmission shaft 13, further make second insert rod 20 drive worm 8 to rotate through rectangular telescopic groove 16, then, one end of worm 8 is engaged with worm wheel 5 and drives worm wheel 5, just can make worm wheel 5 drive rotating shaft 3 to rotate, then, rotating shaft 3 rotates valve plate 2 in valve body 1, and when valve plate 2 rotates to complete, can release hand wheel 10, further push transmission shaft 13 to the direction of operator with the extension rebound force of the compression of compressed spring 21, to make transmission shaft 13 drive insert sleeve 9 to move at one end of fixed sleeve 6, and make multiple second limiting tooth blocks 18 in the inside of insert sleeve 9 insert between corresponding two first limiting tooth blocks 7 with the guide slope 14 of one side of first limiting tooth block 7, further reposition axial movement of insert sleeve 9, just can make insert sleeve 9 limit the axial movement of worm 8 with transmission shaft 13 and second insert rod 20, further limit the axial movement of worm wheel 5, rotating shaft 3 and valve plate 2.

[0025] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve having a valve disc position limiting structure, characterized by: The utility model provides a valve body (1), the valve plate (2) is movably installed in the valve body (1), the rotating shaft (3) is fixedly installed in the middle part of the valve plate (2), the valve body (1) is fixedly installed with the execution box (4), and the rotating shaft (3) upper end extends to the execution box (4) and is fixedly installed with the worm wheel (5), one side of execution box (4) is fixedly installed with the fixed sleeve (6), a plurality of first limit tooth blocks (7) are fixedly installed on the outer surface of the one end away from the execution box (4) of fixed sleeve (6), the worm (8) is rotatably installed in the execution box (4) near the worm wheel (5), and one end of the worm (8) is engaged with the worm wheel (5), the other end of the worm (8) extends to the fixed sleeve (6) through the execution box (4), the one end near the first limit tooth block (7) of fixed sleeve (6) is movably installed with the insert sleeve (9), the one end of insert sleeve (9) is fixedly installed with hand wheel (10), the transmission shaft (13) is fixedly installed in the insert sleeve (9).

2. The butterfly valve with valve disc limiting structure according to claim 1, characterized in that: A plurality of the first limit tooth blocks (7) are arranged in a ring shape along the outer surface of the fixed sleeve (6), a bidirectional guide slope (14) is formed on one side of the first limit tooth block (7), respectively, a limiting screw (15) is threadedly connected to the fixed sleeve (6) near the first limit tooth block (7), and one end of the limiting screw (15) extends into the fixed sleeve (6).

3. The butterfly valve with valve disc limiting structure according to claim 2, characterized in that: The one end of the worm (8) is provided with a rectangular expansion slot (16).

4. The butterfly valve with valve disc limiting structure according to claim 3, characterized in that: The one end of the insert sleeve (9) is provided with an insertion slot (12), a rectangular mounting slot (17) is formed in the middle of one side of the insertion slot (12), a plurality of second limit tooth blocks (18) are fixedly installed on the inner side of the insertion slot (12), and the second limit tooth blocks (18) are arranged in a ring shape along the inner side of the insertion slot (12).

5. The butterfly valve with valve disc limiting structure according to claim 4, characterized in that: The one end of the transmission shaft (13) is fixedly installed with a first insertion rod (19), the other end of the transmission shaft (13) is fixedly installed with a second insertion rod (20), the second insertion rod (20) is provided with a ring-shaped limiting slot (11), the first insertion rod (19) is inserted into the rectangular mounting slot (17) and fixed by a screw, the one end of the transmission shaft (13) is inserted into the fixed sleeve (6), the one end of the second insertion rod (20) is inserted into the rectangular expansion slot (16), one end of the limiting screw (15) is located in the limiting slot (11), and the second limit tooth blocks (18) are inserted between two first limit tooth blocks (7).

6. The butterfly valve with valve disc limiting structure according to claim 5, characterized in that: The outer side of the second insertion rod (20) is sleeved with a compression spring (21), one end of the compression spring (21) abuts against the one end of the transmission shaft (13), and the other end of the compression spring (21) abuts against the one end of the worm (8).

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