Three-eccentric center butterfly valve flow adjusting device

Abstract

The utility model discloses a three-eccentric center butterfly valve flow adjusting device, which belongs to the technical field of butterfly valves and comprises a valve body, a valve rod vertically and rotatably mounted in the valve body, a valve plate fixed at the bottom end of the valve rod and positioned in the valve body, and a control box positioned at the top of the valve body. According to the butterfly valve, the sliding hole and the hidden groove are formed in the end of the worm, and the driving piece composed of the sliding rod, the end plate and the shifting rod is used in cooperation, so that after flow adjustment of the butterfly valve is completed, the driving piece can be hidden and stored, mistaken touch is effectively avoided, the stability after flow adjustment is guaranteed, and the service life of the butterfly valve is prolonged. Through a positioning mechanism composed of a worm inner mounting groove, an insertion block, an insertion groove, a first spring and a pull rope, locking can be carried out after the driving piece is stored, through an unlocking mechanism composed of a pressing rod, an ejection block and a second spring, the locking state of the driving piece is relieved, the device can be prevented from being maliciously controlled and used by non-staff, and the working efficiency is improved. And the use safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to a flow regulating device, in particular to a triple eccentric butterfly valve flow regulating device, belonging to the technical field of butterfly valves. Background Art

[0002] At present, when controlling the flow of a hand-operated three-eccentric butterfly valve, the rotation of the worm is controlled by rotating the wheel on the outside of the control box, and the worm is used to drive the rotation of the worm wheel at the top of the valve stem to control the opening and closing of the valve plate. The self-locking characteristics between the worm wheel and the worm ensure the stable position of the valve plate.

[0003] Similar to the above application, there are still some shortcomings:

[0004] The position of the turntable is fixed, always located at the end of the worm and exposed to the outside. After the flow regulation is completed, the driving part of the worm cannot be hidden, and it is easy to be accidentally touched, affecting the stability of the flow;

[0005] Therefore, a triple eccentric butterfly valve flow regulating device is designed to optimize the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a three-eccentric butterfly valve flow regulating device, which is provided with a sliding hole and a hidden groove at the end of the worm, and is used in conjunction with a driving member composed of a sliding rod, an end plate and a lever, so that after the butterfly valve flow regulation is completed, the driving member can be hidden and stored, effectively avoiding accidental touch and ensuring the stability after the flow regulation. Through the positioning mechanism composed of the internal mounting groove, plug-in block, slot, first spring and pull rope of the worm, the driving member can be locked after being stored, and the unlocking mechanism composed of the pressure rod, the top block and the second spring can be used to release the locking state of the driving member, so that the device can avoid malicious control and use by non-staff, thereby improving the safety of the device.

[0007] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] A three-eccentric butterfly valve flow regulating device comprises a valve body, a valve stem vertically rotatably installed inside the valve body, a valve plate fixed at the bottom end of the valve stem and located inside the valve body, a control box located at the top of the valve body, a worm wheel located inside the control box and connected to the top end of the valve stem, and a worm meshing with the outside of the worm wheel, one end of the worm wheel extends to the outside of the control box, a sliding hole is provided at the middle position of the end of the worm wheel located outside the control box, a sliding rod is provided inside the sliding hole for horizontal sliding along the length direction, an end plate is fixed at the end of the sliding rod away from the control box, a lever is hingedly installed on the inner side of the end plate, a hidden groove cooperating with the lever is provided on the outer side of the end of the worm wheel close to the sliding hole, and a positioning mechanism for limiting the lever is provided inside the worm wheel.

[0009] Preferably: the positioning mechanism includes an installation groove, an insertion block, a slot, a first spring and a pull rope, the installation groove is opened at the inner bottom end of the hidden groove, the inside of the hidden groove is slidably provided with an insertion block, the end of the lever is opened with a slot matching the insertion block, a first spring is provided between the end of the insertion block and the end of the installation groove, a pull rope is provided between the insertion blocks, the pull rope passes through the inside of the sliding hole, and the inside of the sliding rod is provided with an extrusion mechanism for controlling the contraction of the insertion block.

[0010] Preferably, the cross-sectional view of the insert block is a right-angled trapezoid, and the inclined surface of the insert block faces the outer end of the worm.

[0011] Preferably: the extrusion mechanism includes a pressure rod, a top block and a second spring. The pressure rod is slidably arranged inside the sliding rod along the length direction of the sliding rod. Both ends of the pressure rod pass through the sliding rod. A top block is fixed to the end of the pressure rod close to the pull rope, and the top block is in contact with the pull rope. A second spring is provided between the top block and the end of the sliding rod, and the pressure rod passes through the inside of the second spring.

[0012] Preferably: a pressing groove is opened on one side of the end plate, one end of the pressing rod is located inside the pressing groove, and the end of the pressing rod and the outer side surface of the end plate are located on the same vertical plane.

[0013] Preferably, a magnetic block is provided on the inner side of the end plate, and the outer side of the magnetic block is magnetically attracted to the surface of the lever.

[0014] Preferably, four groups of levers are provided, and the angle between adjacent levers is 90°.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a triple eccentric butterfly valve flow regulating device, which is provided with a sliding hole and a hidden groove at the end of the worm, and is used in conjunction with a driving member composed of a sliding rod, an end plate and a lever, so that after the butterfly valve flow is regulated, the driving member can be hidden and stored, effectively avoiding accidental touch and ensuring stability after flow regulation;

[0017] Through the positioning mechanism composed of the internal mounting groove, plug-in block, slot, first spring and pull rope of the worm gear, the driving member can be locked after being stored, and the locking state of the driving member can be released through the squeezing mechanism composed of the pressure rod, top block and second spring, so that the device can be prevented from being controlled and used maliciously by non-staff, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front cross-sectional view of the utility model;

[0019] Figure 2 This is a cross-sectional view of the interior of the control box of the utility model;

[0020] Figure 3 For the utility model Figure 1 A magnified view of the structure at center;

[0021] Figure 4 For the utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0022] In the figure: 1. valve body; 2. valve stem; 3. valve plate; 4. control box; 5. worm gear; 6. worm; 7. sliding hole; 8. sliding rod; 9. end plate; 10. lever; 11. hidden groove; 12. mounting groove; 13. plug-in block; 14. slot; 15. first spring; 16. pull rope; 17. pressure rod; 18. top block; 19. second spring; 20. pressure groove; 21. magnetic block. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0024] like Figure 1-Figure 4 As shown, this embodiment provides a three-eccentric butterfly valve flow regulating device, including a valve body 1, a valve stem 2 vertically rotatably installed inside the valve body 1, a valve plate 3 fixed at the bottom end of the valve stem 2 and located inside the valve body 1, a control box 4 located at the top of the valve body 1, a worm gear 5 located inside the control box 4 and connected to the top end of the valve stem 2, and a worm 6 meshing with the outside of the worm gear 5, one end of the worm 6 extends to the outside of the control box 4, a sliding hole 7 is provided at the middle position of one end of the worm 6 located outside the control box 4, a sliding rod 8 is provided inside the sliding hole 7 for horizontal sliding along the length direction, an end plate 9 is fixed at the end of the sliding rod 8 away from the control box 4, a lever 10 is hingedly installed on the inner side of the end plate 9, a hidden groove 11 cooperating with the lever 10 is provided on the outer side of the end of the worm 6 close to the sliding hole 7, and a positioning mechanism for limiting the lever 10 is provided inside the worm 6.

[0025] The overall working principle is: when adjusting the flow rate, first release the positioning state of the lever 10, then pull the slide rod 8 out horizontally from the inside of the worm 6, and pull the lever 10 out from the inside of the control box 4, then flip the lever 10 to the outside, spread the lever 10 to the outside of the end plate 9, and then hold the lever 10 to control the rotation of the worm 6. Under the transmission control of the worm 6 and the worm wheel 5, control the rotation of the valve plate 3 to adjust the flow rate. After the adjustment is completed, flip the lever 10 to fit the outside of the worm 6, and then insert the slide rod 8 into the inside of the slide hole 7, hide the lever 10 and the slide rod 8 to avoid accidental touch.

[0026] In this embodiment, the positioning mechanism includes an installation groove 12, an insert block 13, a slot 14, a first spring 15 and a pull rope 16. The installation groove 12 is opened at the inner bottom end of the hidden groove 11, and the inside of the hidden groove 11 is slidably provided with an insert block 13. The end of the lever 10 is opened with a slot 14 that cooperates with the insert block 13. A first spring 15 is provided between the end of the insert block 13 and the end of the installation groove 12. A pull rope 16 is provided between the insert blocks 13, and the pull rope 16 passes through the inside of the sliding hole 7. The inside of the sliding rod 8 is provided with an extrusion mechanism for controlling the contraction of the insert block 13.

[0027] Local working principle: after the lever 10 slides to the end of the hidden groove 11 along the length direction of the hidden groove 11, the elastic force of the first spring 15 controls the reset of the plug block 13, and inserts the plug block 13 into the inside of the slot 14 to prevent the lever 10 from sliding, and effectively locates the position of the lever 10 and the slide rod 8. If it is necessary to unlock the lever 10, it is only necessary to use the squeezing mechanism to squeeze the pull rope 16 and stretch the plug block 13 to the inside of the installation groove 12 to unlock the locked state.

[0028] In this embodiment, the cross-sectional shape of the insert block 13 is a right-angled trapezoid, and the inclined surface of the insert block 13 faces the outer end of the worm 6 .

[0029] Partial working principle: The setting of the inclined surface on the insert block 13 enables the insert block 13 to be automatically compressed into the inside of the installation groove 12 when the lever 10 is retracted, making the retraction more convenient.

[0030] In this embodiment, the extrusion mechanism includes a pressure rod 17, a top block 18 and a second spring 19. The pressure rod 17 is slidably arranged inside the sliding rod 8 along the length direction of the sliding rod 8. Both ends of the pressure rod 17 pass through the sliding rod 8. A top block 18 is fixed to one end of the pressure rod 17 close to the pull rope 16, and the top block 18 is in contact with the pull rope 16. A second spring 19 is provided between the top block 18 and the end of the sliding rod 8, and the pressure rod 17 passes through the inside of the second spring 19.

[0031] Local working principle: when releasing the locking state of the lever 10, pressure is applied to one end of the pressure rod 17 through the fingers of one hand, and the top block 18 on the pressure rod 17 moves toward one end of the pull rope 16, squeezing the pull rope 16 and stretching the plug 13 to the inside of the mounting groove 12. Then the other hand holds the end plate 9 and pulls the slide rod 8 outward. During the pulling process of the slide rod 8, the squeezing force on the pressure rod 17 is increased, and the extended length of the pressure rod 17 is extended to ensure that the plug 13 is located inside the mounting groove 12. After the mounting groove 12 and the slot 14 are offset, the squeezing force on the pressure rod 17 is released, and the slide rod 8 continues to be pulled out. During the operation, both hands need to cooperate at the same time to effectively avoid malicious adjustments by non-staff, and the use safety is higher.

[0032] In this embodiment, a pressing groove 20 is opened on one side of the end plate 9 , one end of the pressing rod 17 is located inside the pressing groove 20 , and the end of the pressing rod 17 and the outer side surface of the end plate 9 are located on the same vertical plane.

[0033] Partial working principle: the pressure rod 17 does not need to extend to the outside of the end plate 9 when in use, and is more concealed and beautiful.

[0034] In this embodiment, a magnetic block 21 is disposed on the inner side of the end plate 9 , and the outer side of the magnetic block 21 is magnetically attracted to the surface of the lever 10 .

[0035] Partial working principle: After the lever 10 is turned over, the magnetic block 21 will be attracted to the lever 10 to stabilize the position of the lever 10, making it easier to adjust the flow of the device and more convenient to use.

[0036] In this embodiment, four groups of levers 10 are provided, and the angle between adjacent levers 10 is 90°.

[0037] Partial working principle: By using multiple groups of levers 10, manual control is made more convenient.

[0038] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A triple eccentric butterfly valve flow control device, comprising a valve body (1), a valve stem (2) vertically rotatably mounted inside the valve body (1), a valve plate (3) fixed to the bottom end of the valve stem (2) and located inside the valve body (1), a control box (4) located at the top of the valve body (1), a worm gear (5) located inside the control box (4) and connected to the top end of the valve stem (2), and a worm (6) meshing with the outside of the worm gear (5), characterized in that: One end of the worm (6) extends to the outside of the control box (4); a sliding hole (7) is provided at the middle position of one end of the worm (6) located outside the control box (4); a sliding rod (8) is provided inside the sliding hole (7) for horizontal sliding along the length direction; an end plate (9) is fixed to the end of the sliding rod (8) away from the control box (4); a lever (10) is hingedly installed on the inner side of the end plate (9); a hidden groove (11) cooperating with the lever (10) is provided on the outer side of one end of the worm (6) close to the sliding hole (7); and a positioning mechanism for limiting the lever (10) is provided inside the worm (6).

2. A triple eccentric butterfly valve flow control device according to claim 1, characterized in that: The positioning mechanism comprises a mounting groove (12), an insert block (13), a slot (14), a first spring (15) and a pull rope (16); the mounting groove (12) is arranged at the inner bottom end of the hidden groove (11); an insert block (13) is slidably arranged inside the hidden groove (11); a slot (14) matching with the insert block (13) is arranged at the end of the lever (10); a first spring (15) is arranged between the end of the insert block (13) and the end of the mounting groove (12); a pull rope (16) is arranged between the insert blocks (13); the pull rope (16) passes through the inside of the sliding hole (7); and a squeezing mechanism for controlling the contraction of the insert block (13) is arranged inside the sliding rod (8).

3. A triple eccentric butterfly valve flow control device according to claim 2, characterized in that: The cross-sectional view of the insert block (13) is in the shape of a right-angled trapezoid, and the inclined surface of the insert block (13) faces the outer end of the worm (6).

4. A triple eccentric butterfly valve flow control device according to claim 3, characterized in that: The squeezing mechanism comprises a pressure rod (17), a top block (18) and a second spring (19). The pressure rod (17) is slidably arranged inside the sliding rod (8) along the length direction of the sliding rod (8). Both ends of the pressure rod (17) penetrate the sliding rod (8). A top block (18) is fixed to one end of the pressure rod (17) close to the pull rope (16), and the top block (18) is in contact with the pull rope (16). A second spring (19) is arranged between the top block (18) and the end of the sliding rod (8), and the pressure rod (17) passes through the inside of the second spring (19).

5. A triple eccentric butterfly valve flow control device according to claim 4, characterized in that: A pressing groove (20) is provided on one side of the end plate (9), one end of the pressing rod (17) is located inside the pressing groove (20), and the end of the pressing rod (17) and the outer side surface of the end plate (9) are located on the same vertical plane.

6. A triple eccentric butterfly valve flow control device according to any one of claims 1 to 5, characterized in that: A magnetic block (21) is provided on the inner side of the end plate (9), and the outer side of the magnetic block (21) is magnetically attracted to the surface of the lever (10).

7. A triple eccentric butterfly valve flow control device according to claim 6, characterized in that: Four groups of shifting rods (10) are provided, and the angle between adjacent shifting rods (10) is 90°.

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