A leak-proof butterfly valve

Abstract

The utility model belongs to the technical field of anti-leakage butterfly valves, specifically an anti-leakage butterfly valve, comprising a valve body, a mounting plate fixedly connected to the top of the valve body, a through hole opened on the top of the mounting plate, a valve stem rotatably connected in the through hole, a lever arranged in the valve stem, the trapezoidal block is pressed downward by the positioning rod, and a second spring is compressed. When the positioning rod moves to the top of the trapezoidal block and coincides with the positioning hole, the positioning rod no longer presses the trapezoidal block. At this time, the trapezoidal block will reset upward under the action of the elastic restoring force of the second spring itself, thereby driving the positioning hole to move upward synchronously. Through such an arrangement, when the trapezoidal block moves upward under the action of the second spring, the positioning rod will be in the positioning hole. The positioning hole can limit and fix the positioning rod, thereby positioning and fixing the position of the lever, thereby avoiding external vibration or the user's accidental touching of the handle, which may cause the valve plate to rotate and cause the butterfly valve to leak.

Description

Technical Field

[0001] The utility model belongs to the technical field of leakage-proof butterfly valves, in particular to an leakage-proof butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve with a closing member as a disc, which rotates around the valve axis to achieve opening and closing. The butterfly valve 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. It mainly plays a role of cutting off and throttling in pipelines.

[0003] For example, a Chinese patent with publication number CN219082273U discloses an anti-leakage butterfly valve, including a valve body, a valve plate and a valve stem, the valve body including a circulation groove and a valve stem seat, the valve plate is rotatably connected in the circulation groove, the outer surface of the valve plate is connected to a sealing ring by gluing, a sealing groove corresponding to the sealing ring is opened in the circulation groove, an elastic member is connected in the sealing groove by a card groove, and a second sealing ring corresponding to the sealing ring is fixedly connected to the inner side of the elastic member by gluing. The utility model provides an anti-leakage butterfly valve with simple and compact structure, low cost, good anti-leakage effect, and is suitable for being widely promoted and used.

[0004] The common butterfly valves in the current prior art usually have a sealing ring fixed on the outer surface of the valve plate to prevent leakage of the butterfly valve. However, when the butterfly valve is closed, external vibration or the user's accidental touching of the handle may cause the valve plate to rotate, changing the working state of the butterfly valve, thereby causing the butterfly valve to leak.

[0005] Therefore, a leakage-proof butterfly valve is proposed to solve the above problems. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned problems, an anti-leakage butterfly valve is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: an anti-leakage butterfly valve described in the utility model comprises a valve body, a mounting plate is fixedly connected to the top of the valve body, a through hole is opened on the top of the mounting plate, a valve stem is rotatably connected in the through hole, a shift rod is arranged in the valve stem, a positioning rod is fixedly connected to the bottom of the shift rod, one end of the valve stem located inside the valve body is fixedly connected to the valve plate, the mounting plate is slidably connected to a connecting plate, a second spring is fixedly connected to the top of the connecting plate, a trapezoidal block is fixedly connected to the top of the second spring, a positioning hole is opened on the top of the trapezoidal block, a second telescopic rod is fixedly connected to the top of the connecting plate and on both sides of the second spring, the top of each of the second telescopic rods is fixedly connected to the lower surface of the trapezoidal block, and the positioning rod is adapted to the size of the positioning hole.

[0008] Preferably, a mounting groove is provided in the valve stem, the mounting groove is located above the mounting plate, a first spring is fixedly connected to the bottom of the mounting groove, the top of the first spring is fixedly connected to the lower surface of the lever, and the lever is adapted to the mounting groove in size.

[0009] Preferably, a first telescopic rod is fixedly connected to the top of the mounting groove, and a bottom of the first telescopic rod is fixedly connected to the upper surface of the shifting rod.

[0010] Preferably, a circular slide groove is provided on the top of the mounting plate, a slider is slidably connected in the circular slide groove, the top of the slider is fixedly connected to the lower surface of the connecting plate, a through groove is provided at the bottom of the circular slide groove, a threaded groove is provided at the bottom of the slider, a threaded rod is threadedly connected in the threaded groove, the threaded rod is slidably installed in the through groove, and a knob is fixedly connected to the bottom of the threaded rod.

[0011] Preferably, the connecting plate is provided with limit grooves on both sides of the inner wall of the circular slide groove, and the outer wall of the sliding block is fixedly connected with two groups of limit blocks, the limit blocks correspond to the limit grooves one by one, and the limit blocks are slidably installed in the limit grooves.

[0012] Preferably, a fixing groove is provided in the valve body and on the outer side of the valve plate, a rubber ring is fixedly connected in the fixing groove, and the rubber ring is in contact with the outer wall of the valve plate.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides an anti-leakage butterfly valve, which squeezes the trapezoidal block downwards through a positioning rod and compresses the second spring. When the positioning rod moves to the top of the trapezoidal block and coincides with the positioning hole, the positioning rod no longer squeezes the trapezoidal block. At this time, the trapezoidal block will reset upwards under the action of the elastic restoring force of the second spring itself, thereby driving the positioning hole to move upward synchronously. Through such an arrangement, when the trapezoidal block moves upwards under the action of the second spring, the positioning rod will be in the positioning hole. The positioning hole can limit and fix the positioning rod, thereby positioning and fixing the position of the lever, thereby avoiding external vibration or the user's accidental touching of the handle, which may cause the valve plate to rotate and cause the butterfly valve to leak.

[0015] The utility model provides an anti-leakage butterfly valve, which moves the connecting plate to a suitable position by sliding the connecting plate, and then rotates the knob to drive the threaded rod to move into the threaded groove to fix the position of the connecting plate, and then rotates the lever to drive the positioning rod to enter the positioning hole again. At this time, the positioning hole can fix the position of the positioning rod, thereby preventing the water flow from hitting the valve plate and causing the valve plate to rotate, thereby preventing the flow rate in the butterfly valve pipeline from being reduced, thereby ensuring the normal use of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a plan view of the utility model;

[0018] Figure 2 It is a three-dimensional diagram of the utility model;

[0019] Figure 3 It is a cross-sectional perspective view of the valve body in the utility model;

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 It is a cross-sectional view of the valve body in the utility model;

[0022] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0023] Figure 7 It is a cross-sectional view of the mounting plate in the utility model.

[0024] Legend:

[0025] 1. Valve body; 2. Mounting plate; 3. Valve stem; 4. Mounting groove; 5. First telescopic rod; 6. First spring; 7. Push rod; 8. Positioning rod; 9. Connecting plate; 10. Second telescopic rod; 11. Second spring; 12. Trapezoidal block; 13. Positioning hole; 14. Circular slide groove; 15. Slider; 16. Limiting groove; 17. Limiting block; 18. Knob; 19. Rubber ring; 20. Fixing groove; 21. Threaded groove; 22. Threaded rod; 23. Through groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Specific examples are given below.

[0028] See also Figure 1-Figure 7 The utility model provides an anti-leakage butterfly valve, including a valve body 1, a mounting plate 2 is fixedly connected to the top of the valve body 1, a through hole is opened on the top of the mounting plate 2, a valve stem 3 is rotatably connected in the through hole, a lever 7 is arranged in the valve stem 3, a positioning rod 8 is fixedly connected to the bottom of the lever 7, one end of the valve stem 3 located inside the valve body 1 is fixedly connected to a valve plate, the mounting plate 2 is slidably connected to a connecting plate 9, a second spring 11 is fixedly connected to the top of the connecting plate 9, a trapezoidal block 12 is fixedly connected to the top of the second spring 11, a positioning hole 13 is opened on the top of the trapezoidal block 12, a second telescopic rod 10 is fixedly connected to the top of the connecting plate 9 and located on both sides of the second spring 11, the top of each of the second telescopic rods 10 is fixedly connected to the lower surface of the trapezoidal block 12, and the positioning rod 8 is adapted to the size of the positioning hole 13;

[0029] In order to avoid external vibration or the user's accidental touch of the handle, which may cause the valve plate to rotate and leak the butterfly valve, after the butterfly valve is used, the staff will rotate the lever 7 toward the trapezoidal block 12. During the rotation of the lever 7, the positioning rod 8 at its bottom will be driven to contact the inclined surface of the trapezoidal block 12. As the staff continues to rotate the lever 7, the positioning rod 8 will squeeze the trapezoidal block 12 downward and compress the second spring 11. When the positioning rod 8 moves to the top of the trapezoidal block 12 and coincides with the positioning hole 13, the positioning rod 8 no longer squeezes the trapezoidal block 12. At this time, the trapezoidal block 12 will reset upward under the action of the elastic restoring force of the second spring 11, thereby driving the positioning hole 13 to move upward synchronously. Through such a setting, when the trapezoidal block 12 moves upward under the action of the second spring 11, the positioning rod 8 will be in the positioning hole 13. The positioning hole 13 can limit and fix the positioning rod 8, thereby positioning and fixing the position of the lever 7, thereby avoiding external vibration or the user's accidental touch of the handle, which may cause the valve plate to rotate and leak the butterfly valve.

[0030] In addition, when the trapezoidal block 12 moves, it drives the second telescopic rod 10 to extend and retract. At this time, the second telescopic rod 10 can limit the trapezoidal block 12 to prevent the trapezoidal block 12 from tilting or rotating when being squeezed, thereby causing the position of the positioning hole 13 to shift, resulting in the subsequent inability to position and fix the position of the lever 7.

[0031] It should be noted that when the positioning rod 8 coincides with the positioning hole 13 , the valve stem 3 rotates 90 degrees and drives the valve plate to close the valve body 1 .

[0032] Further, such as Figure 5 and Figure 6 As shown, a mounting groove 4 is provided in the valve stem 3, and the mounting groove 4 is located above the mounting plate 2. A first spring 6 is fixedly connected to the bottom of the mounting groove 4, and the top of the first spring 6 is fixedly connected to the lower surface of the lever 7. The lever 7 is adapted to the mounting groove 4 in size. When the butterfly valve needs to be used later, it is only necessary to pull the lever 7 upward and squeeze the first spring 6. During the upward movement of the lever 7, the positioning rod 8 can be driven to disengage from the positioning hole 13. When the positioning rod 8 is completely disengaged from the positioning hole 13, the lever 7 can be rotated in the opposite direction, thereby driving the valve stem 3 and the valve plate to rotate, which is convenient for the continued use of the valve body 1; then the lever 7 is released, and the lever 7 will move downward under the action of the elastic restoring force of the first spring 6 itself, which is convenient for subsequent use.

[0033] Further, such as Figure 5 and Figure 6As shown, a first telescopic rod 5 is fixedly connected to the top of the mounting groove 4, and the bottom of the first telescopic rod 5 is fixedly connected to the upper surface of the lever 7. When the lever 7 moves upward, it will drive the first telescopic rod 5 to extend and retract. At this time, the first telescopic rod 5 will limit the lever 7, thereby preventing the lever 7 from warping when it is pulled upward, resulting in the positioning rod 8 being unable to move out, thereby ensuring the subsequent normal use of the butterfly valve.

[0034] Further, such as Figure 4 and Figure 7 As shown, a circular slide groove 14 is provided on the top of the mounting plate 2, a slider 15 is slidably connected in the circular slide groove 14, the top of the slider 15 is fixedly connected to the lower surface of the connecting plate 9, a through groove 23 is provided at the bottom of the circular slide groove 14, a threaded groove 21 is provided at the bottom of the slider 15, a threaded rod 22 is threadedly connected in the threaded groove 21, the threaded rod 22 is slidably installed in the through groove 23, and a knob 18 is fixedly connected to the bottom of the threaded rod 22;

[0035] When the butterfly valve needs to be used in a semi-open and semi-closed state for a long time, the connecting plate 9 can be slid to move the connecting plate 9 to a suitable position, and then the knob 18 can be rotated to drive the threaded rod 22 to move into the thread groove 21 to fix the position of the connecting plate 9, and then the lever 7 is rotated to drive the positioning rod 8 to enter the positioning hole 13 again. At this time, the positioning hole 13 can fix the position of the positioning rod 8, thereby preventing the water flow from hitting the valve plate and causing the valve plate to rotate, thereby preventing the flow rate in the butterfly valve pipeline from decreasing, thereby ensuring the normal use of the butterfly valve;

[0036] When the butterfly valve is used, the knob 18 is rotated again to release the fixation of the connecting plate 9, and then the lever 7 is rotated to make the valve plate close the valve body 1. Since the positioning rod 8 is inside the positioning hole 13 at this time, the valve stem 3 will drive the slider 15 to move in the circular slide groove 14 when it rotates. When the valve body 1 is completely closed, the knob 18 is rotated to fix the connecting plate 9, and the connecting plate 9 can be fixed again. After the connecting plate 9 is fixed, the trapezoidal block 12 on its top can in turn fix the valve stem 3, thereby avoiding external vibration or the user's accidental touching of the handle, which may cause the valve plate to rotate and the butterfly valve to leak.

[0037] Further, such as Figure 4 and Figure 7 As shown, the inner wall of the connecting plate 9 and on both sides of the circular slide groove 14 is provided with a limit groove 16, and the outer wall of the slider 15 is fixedly connected with two sets of limit blocks 17, and the limit blocks 17 correspond to the limit grooves 16 one by one, and the limit blocks 17 are slidably installed in the limit grooves 16;

[0038] When the slider 15 moves, it will drive the limit block 17 to move in the limit groove 16. The limit block 17 can limit the slider 15, thereby preventing the slider 15 from tilting during the movement, thereby ensuring the stability of the movement of the slider 15.

[0039] Further, such as Figure 3 and Figure 5 As shown, a fixing groove 20 is opened in the valve body 1 and located on the outer side of the valve plate, and a rubber ring 19 is fixedly connected in the fixing groove 20. The rubber ring 19 fits tightly with the outer wall of the valve plate, thereby ensuring the sealing effect of the valve plate in a closed state, thereby improving the overall sealing of the butterfly valve and avoiding leakage.

[0040] Working principle: In order to avoid external vibration or the user's accidental touch of the handle, which may cause the valve plate to rotate and the butterfly valve to leak, after the butterfly valve is used, the staff will rotate the lever 7 toward the trapezoidal block 12. During the rotation of the lever 7, it will drive the positioning rod 8 at its bottom to contact the inclined surface of the trapezoidal block 12. As the staff continues to rotate the lever 7, the positioning rod 8 will squeeze the trapezoidal block 12 downward and compress the second spring 11. When the positioning rod 8 moves to the top of the trapezoidal block 12 and coincides with the positioning hole 13, the positioning rod 8 will no longer The trapezoidal block 12 is squeezed, and the trapezoidal block 12 will reset upward under the action of the elastic restoring force of the second spring 11, thereby driving the positioning hole 13 to move upward synchronously. By such a configuration, when the trapezoidal block 12 moves upward under the action of the second spring 11, the positioning rod 8 will be in the positioning hole 13, and the positioning hole 13 can limit and fix the positioning rod 8, thereby positioning and fixing the position of the lever 7, thereby avoiding external vibration or the user's accidental touch of the handle, resulting in the valve plate rotating butterfly valve leakage;

[0041] When the butterfly valve needs to be used in a semi-open and semi-closed state for a long time, the connecting plate 9 can be slid to move the connecting plate 9 to a suitable position, and then the knob 18 is rotated to drive the threaded rod 22 to move into the thread groove 21 to fix the position of the connecting plate 9, and then the lever 7 is rotated to drive the positioning rod 8 to enter the positioning hole 13 again. At this time, the positioning hole 13 can fix the position of the positioning rod 8, thereby preventing the water flow from hitting the valve plate and causing the valve plate to rotate, thereby preventing the flow rate in the butterfly valve pipeline from decreasing, thereby ensuring the normal use of the butterfly valve;

[0042] When the butterfly valve is used, the knob 18 is rotated again to release the fixation of the connecting plate 9, and then the lever 7 is rotated to make the valve plate close the valve body 1. Since the positioning rod 8 is inside the positioning hole 13 at this time, the valve stem 3 will drive the slider 15 to move in the circular slide groove 14 when it rotates. When the valve body 1 is completely closed, the knob 18 is rotated to fix the connecting plate 9, and the connecting plate 9 can be fixed again. After the connecting plate 9 is fixed, the trapezoidal block 12 on its top can in turn fix the valve stem 3, thereby avoiding external vibration or the user's accidental touching of the handle, which may cause the valve plate to rotate and the butterfly valve to leak.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A leakage-proof butterfly valve, characterized in that: The invention comprises a valve body (1), wherein a mounting plate (2) is fixedly connected to the top of the valve body (1), a through hole is provided at the top of the mounting plate (2), a valve stem (3) is rotatably connected in the through hole, a lever (7) is provided in the valve stem (3), a positioning rod (8) is fixedly connected to the bottom of the lever (7), one end of the valve stem (3) located inside the valve body (1) is fixedly connected to a valve plate, the mounting plate (2) is slidably connected to a connecting plate (9), a second spring (11) is fixedly connected to the top of the connecting plate (9), a trapezoidal block (12) is fixedly connected to the top of the second spring (11), a positioning hole (13) is provided at the top of the trapezoidal block (12), a second telescopic rod (10) is fixedly connected to the top of the connecting plate (9) and located on both sides of the second spring (11), the top of each second telescopic rod (10) is fixedly connected to the lower surface of the trapezoidal block (12), and the positioning rod (8) is adapted in size to the positioning hole (13).

2. The anti-leakage butterfly valve according to claim 1, characterized in that: A mounting groove (4) is provided in the valve stem (3), and the mounting groove (4) is located above the mounting plate (2). A first spring (6) is fixedly connected to the bottom of the mounting groove (4), and the top end of the first spring (6) is fixedly connected to the lower surface of a lever (7), and the lever (7) is adapted to the mounting groove (4) in size.

3. The anti-leakage butterfly valve according to claim 2, characterized in that: A first telescopic rod (5) is fixedly connected to the top of the installation groove (4), and a bottom of the first telescopic rod (5) is fixedly connected to the upper surface of the shifting rod (7).

4. The anti-leakage butterfly valve according to claim 3, characterized in that: The mounting plate (2) is provided with a circular slide groove (14) at the top, a slider (15) is slidably connected in the circular slide groove (14), the top of the slider (15) is fixedly connected to the lower surface of the connecting plate (9), the circular slide groove (14) is provided with a through groove (23) at the bottom, the slider (15) is provided with a threaded groove (21) at the bottom, a threaded rod (22) is threadedly connected in the threaded groove (21), the threaded rod (22) is slidably installed in the through groove (23), and the bottom of the threaded rod (22) is fixedly connected to a knob (18).

5. The anti-leakage butterfly valve according to claim 4, characterized in that: Limiting grooves (16) are provided in the connecting plate (9) and on the inner walls on both sides of the circular slide groove (14); two groups of limiting blocks (17) are fixedly connected to the outer wall of the sliding block (15); the limiting blocks (17) correspond to the limiting grooves (16) one by one, and the limiting blocks (17) are slidably installed in the limiting grooves (16).

6. The anti-leakage butterfly valve according to claim 5, characterized in that: A fixing groove (20) is provided in the valve body (1) and located on the outer side of the valve plate. A rubber ring (19) is fixedly connected in the fixing groove (20). The rubber ring (19) is in contact with the outer wall of the valve plate.

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