Zero-leakage butterfly valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a zero-leakage butterfly valve which comprises a valve body, a butterfly plate is arranged on the valve body, and a mounting groove is formed in the butterfly plate. A pull block is pulled to drive a corresponding connecting plate to move through a flexible steel rope, the connecting plate drives a corresponding connecting rod to slide on a limiting rod and compress a first spring, meanwhile, the connecting plate drives a corresponding clamping pin to move, then a sealing ring is placed on a mounting groove, and a pressing ring is pressed on the sealing ring; a mounting block on a rectangular plate corresponds to a square hole and is inserted into a cavity, when one side of a pressing ring makes contact with one side of a butterfly plate, the force on a pull block is released, a first spring in a compressed state is reset, the first spring drives a corresponding connecting plate to move through a connecting rod, and the connecting plate drives a corresponding clamping pin to be clamped with a clamping groove; the sealing ring is fixed on the butterfly plate by the aid of the sealing ring, the butterfly plate is mounted without a butterfly nail, professional tools are not needed, and the stability of the sealing ring is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a zero-leakage butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. A butterfly valve is a valve whose closing disc is a disc that rotates around the valve shaft to achieve opening and closing. A 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. The opening and closing part of a butterfly valve is a disc-shaped disc that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] The known authorized invention (publication number: CN211779042U) discloses a three-eccentric bidirectional pressure-hardened zero-leakage butterfly valve, including a valve body, a valve seat and a butterfly plate. The valve seat is integrally formed inside the valve body, the butterfly plate is arranged inside the valve body, a pressure ring is arranged on one side of the butterfly plate, and a metal sealing ring is arranged between the pressure ring and the butterfly plate. The beneficial effect is that the utility model provides three layers of metal sealing rings, so that the butterfly valve can be applied to high temperature, high pressure and corrosive working conditions. When the pressure in the pipeline is high, the medium flow rate is fast, and the butterfly plate is in a partially open or fully open state, the sealing ring will not wear off, which greatly ensures the sealing performance of the valve and avoids leakage of the sealing surface.

[0004] However, there are still some problems with the device. In actual use, when fixing the sealing ring, the butterfly valve uses a pressure ring and multiple butterfly pins to install the sealing ring on the butterfly plate. Professional tools are needed to tighten the butterfly pins. The operation process is cumbersome and time-consuming, which not only increases the cost of installation and maintenance, but also seriously affects the stability of the sealing ring when multiple butterfly pins are stripped. Therefore, we proposed a zero leakage butterfly valve to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a zero-leakage butterfly valve, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0009] A zero leakage butterfly valve comprises a valve body, wherein a butterfly plate is provided on the valve body, a mounting groove is provided on the butterfly plate, a cavity is provided on the butterfly plate, two blocks are fixedly connected to the inner wall of one side of the cavity, a limiting rod is welded on one side of the block, a connecting rod is slidably connected to the limiting rod, a first spring is welded between the end of the connecting rod and the corresponding block, the first spring is movably sleeved on the corresponding limiting rod, a connecting plate is fixedly connected to the other end of the connecting rod, two bayonet pins are welded on one side of the connecting plate, two fixed pulleys are rotatably connected to the inner wall of the other side of the cavity, a flexible steel rope is fixedly connected to the other side of the connecting plate, the end of the flexible steel rope bypasses one side of the corresponding fixed pulley and extends to the outside of the butterfly plate and is welded with a pull block, a pressure ring is movably contacted on one side of the butterfly plate, a rectangular plate is fixedly connected to the inner wall of the pressure ring, four mounting blocks are fixedly connected to one side of the rectangular plate, a slot is provided on one side of the mounting block, the slot is clamped with the corresponding bayonet pin, a sealing ring is provided between the pressure ring and the mounting slot, and a base is fixedly connected to the bottom of the valve body.

[0010] Furthermore, four square holes are provided on the inner wall on the other side of the cavity, and the inner walls of the square holes are in movably contact with the outer sides of the corresponding mounting blocks.

[0011] Furthermore, a horizontal plate is fixedly connected to the rear side of the butterfly plate, and two vertical rods are welded to the bottom of the horizontal plate.

[0012] Furthermore, a support rod is slidably connected to the vertical rod, a second spring is welded between the end of the support rod and one side of the horizontal plate, and the second spring is movably sleeved on the corresponding vertical rod.

[0013] Furthermore, the other ends of the two support rods are fixedly connected to a same stopper, and the stopper is in movably contact with the pull block.

[0014] Furthermore, a limiting groove is provided on the connecting rod, and the connecting rod is slidably connected to the corresponding limiting rod through the limiting groove.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a zero leakage butterfly valve, which has the following beneficial effects:

[0017] The utility model drives the corresponding connecting plate to move through the flexible steel rope by pulling the pulling block, so that the two connecting plates move in the direction of approaching each other, the connecting plate drives the corresponding connecting rod to slide on the limiting rod and compress the first spring, and at the same time the connecting plate drives the corresponding bayonet to move, and then the sealing ring is placed on the installation groove, and the pressure ring is pressed on the sealing ring, and inserted into the cavity through the corresponding square hole of the installation block on the rectangular plate, when one side of the pressure ring contacts with one side of the butterfly plate, the force on the pulling block is released, and the first spring in the compressed state is reset, and the first spring drives the corresponding connecting plate to move through the connecting rod, and the connecting plate drives the corresponding bayonet to be clamped with the slot, so that the sealing ring is fixed on the butterfly plate, and the installation does not adopt the butterfly nail method, does not need to use professional tools, and ensures the stability of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the utility model;

[0020] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the sealing ring, the pressure ring and the mounting block of the utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the butterfly plate of the utility model;

[0023] Figure 6 For this utility model Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0024] In the figure: 1. valve body; 2. butterfly plate; 3. mounting groove; 4. cavity; 5. block; 6. limit rod; 7. connecting rod; 8. first spring; 9. connecting plate; 10. latch; 11. fixed pulley; 12. flexible steel rope; 13. pull block; 14. pressure ring; 15. rectangular plate; 16. mounting block; 17. slot; 18. sealing ring; 19. square hole; 20. horizontal plate; 21. vertical rod; 22. support rod; 23. second spring; 24. stopper; 25. base. DETAILED DESCRIPTION

[0025] 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 in 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.

[0026] Example

[0027] like Figure 1-6 As shown, a zero leakage butterfly valve proposed in one embodiment of the utility model comprises a valve body 1, a butterfly plate 2 is provided on the valve body 1, a mounting groove 3 is provided on the butterfly plate 2, a cavity 4 is provided on the butterfly plate 2, two blocks 5 are fixedly connected to the inner wall of one side of the cavity 4, a limiting rod 6 is welded to one side of the block 5, a connecting rod 7 is slidably connected to the limiting rod 6, a first spring 8 is welded between the end of the connecting rod 7 and the corresponding block 5, the first spring 8 is movably sleeved on the corresponding limiting rod 6, and the other end of the connecting rod 7 is fixedly connected to a connecting plate 9, Two bayonet pins 10 are welded to one side of the connecting plate 9, and two fixed pulleys 11 are rotatably connected to the inner wall of the other side of the cavity 4. A flexible steel rope 12 is fixedly connected to the other side of the connecting plate 9. The end of the flexible steel rope 12 bypasses one side of the corresponding fixed pulley 11 and extends to the outside of the butterfly plate 2 and is welded with a pull block 13. A pressure ring 14 is movably contacted on one side of the butterfly plate 2. A rectangular plate 15 is fixedly connected to the inner wall of the pressure ring 14. Four mounting blocks 16 are fixedly connected to one side of the rectangular plate 15. A slot 17 is provided on one side of the mounting block 16. The slot 17 The valve body 1 is fixedly connected to the base 25 at the bottom, and the pull block 13 is pulled to drive the corresponding connecting plate 9 to move through the flexible steel rope 12, so that the two connecting plates 9 move towards each other, and the connecting plate 9 drives the corresponding connecting rod 7 to slide on the limit rod 6 and compress the first spring 8. At the same time, the connecting plate 9 drives the corresponding bayonet 10 to move, and then the sealing ring 18 is placed on the installation groove 3, and the pressure ring 14 is pressed on the sealing ring 18. On the top, the mounting block 16 on the rectangular plate 15 is inserted into the cavity 4 through the corresponding square hole 19. When one side of the pressure ring 14 contacts one side of the butterfly plate 2, the force on the pulling block 13 is released, and the first spring 8 in the compressed state is reset. The first spring 8 drives the corresponding connecting plate 9 to move through the connecting rod 7, and the connecting plate 9 drives the corresponding bayonet pin 10 to be clamped with the card groove 17, so that the sealing ring 18 is fixed on the butterfly plate 2. The installation is not carried out by butterfly nails, no professional tools are required, and the stability of the sealing ring 18 is ensured.

[0028] like Figure 3As shown, in some embodiments, four square holes 19 are opened on the inner wall of the other side of the cavity 4, and the inner walls of the square holes 19 are in active contact with the outer sides of the corresponding mounting blocks 16. The provision of the square holes 19 plays a role of limiting.

[0029] like Figure 6 As shown, in some embodiments, a horizontal plate 20 is fixedly connected to the rear side of the butterfly plate 2, and two vertical rods 21 are welded to the bottom of the horizontal plate 20. The arrangement of the horizontal plate 20 plays a supporting role.

[0030] like Figure 6 As shown, in some embodiments, a support rod 22 is slidably connected to the vertical rod 21, and a second spring 23 is welded between the end of the support rod 22 and one side of the horizontal plate 20. The second spring 23 is movably mounted on the corresponding vertical rod 21. The setting of the second spring 23 plays a resetting role.

[0031] like Figure 6 As shown, in some embodiments, the other ends of the two support rods 22 are fixedly connected to the same stopper 24, and the stopper 24 is in active contact with the pull block 13. The setting of the stopper 24 prevents the pull block 13 from being displaced.

[0032] like Figure 5 As shown, in some embodiments, a limiting groove is provided on the connecting rod 7, and the connecting rod 7 is slidably connected to the corresponding limiting rod 6 through the limiting groove. The setting of the limiting rod 6 plays a limiting role.

[0033] Working principle or structural principle, when in use, the sealing ring 18 and the butterfly plate 2 are in a separated state. When installing, move the stopper 24, the stopper 24 drives the support rod 22 to slide on the corresponding vertical rod 21 and compress the second spring 23, so that the stopper 24 no longer blocks the pull block 13, and then pull the pull block 13, the pull block 13 drives the corresponding connecting plate 9 to move through the flexible steel rope 12, so that the two connecting plates 9 move in a direction close to each other, the connecting plate 9 drives the corresponding connecting rod 7 to slide on the limit rod 6 and compress the first spring 8, and the connecting plate 9 drives the corresponding bayonet 10 to move, and then the sealing ring 18 is placed in the installation. The groove 3 is formed on the pressure ring 14, and the pressure ring 14 is pressed on the sealing ring 18, and is inserted into the cavity 4 through the corresponding square hole 19 of the mounting block 16 on the rectangular plate 15. When one side of the pressure ring 14 contacts one side of the butterfly plate 2, the force on the pull block 13 and the stop block 24 is relaxed, and the first spring 8 in the compressed state is reset. The first spring 8 drives the corresponding connecting plate 9 to move through the connecting rod 7, and the connecting plate 9 drives the corresponding bayonet 10 to be clamped with the card groove 17, so that the sealing ring 18 is fixed on the butterfly plate 2. At the same time, the stop block 24 blocks the pull block 13, and is not installed by butterfly nails, does not require the use of professional tools, and ensures the stability of the sealing ring 18.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A zero leakage butterfly valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a butterfly plate (2), the butterfly plate (2) is provided with a mounting groove (3), the butterfly plate (2) is provided with a cavity (4), one inner wall of the cavity (4) is fixedly connected with two blocks (5), one side of the block (5) is welded with a limit rod (6), the limit rod (6) is slidably connected with a connecting rod (7), a first spring (8) is welded between the end of the connecting rod (7) and the corresponding block (5), the first spring (8) is movably sleeved on the corresponding limit rod (6), the other end of the connecting rod (7) is fixedly connected with a connecting plate (9), one side of the connecting plate (9) is welded with two bayonet pins (10), the other inner wall of the cavity (4) is rotatably connected with two fixed sliding springs (11). Wheel (11), the other side of the connecting plate (9) is fixedly connected with a flexible steel rope (12), the end of the flexible steel rope (12) passes around one side of the corresponding fixed pulley (11) and extends to the outside of the butterfly plate (2) and is welded with a pull block (13), one side of the butterfly plate (2) is movably contacted with a pressure ring (14), the inner wall of the pressure ring (14) is fixedly connected with a rectangular plate (15), one side of the rectangular plate (15) is fixedly connected with four mounting blocks (16), one side of the mounting block (16) is provided with a card slot (17), the card slot (17) is clamped with a corresponding card pin (10), a sealing ring (18) is provided between the pressure ring (14) and the mounting slot (3), and the bottom of the valve body (1) is fixedly connected with a base (25).

2. A zero leakage butterfly valve according to claim 1, characterized in that: Four square holes (19) are provided on the inner wall of the other side of the cavity (4), and the inner walls of the square holes (19) are in active contact with the outer sides of the corresponding mounting blocks (16).

3. A zero leakage butterfly valve according to claim 1, characterized in that: A transverse plate (20) is fixedly connected to the rear side of the butterfly plate (2), and two vertical rods (21) are welded to the bottom of the transverse plate (20).

4. A zero leakage butterfly valve according to claim 3, characterized in that: A support rod (22) is slidably connected to the vertical rod (21), a second spring (23) is welded between the end of the support rod (22) and one side of the horizontal plate (20), and the second spring (23) is movably sleeved on the corresponding vertical rod (21).

5. A zero leakage butterfly valve according to claim 4, characterized in that: The other ends of the two support rods (22) are fixedly connected to a same stopper (24), and the stopper (24) is in active contact with the pull block (13).

6. A zero leakage butterfly valve according to claim 1, characterized in that: The connecting rod (7) is provided with a limiting groove, and the connecting rod (7) is slidably connected to the corresponding limiting rod (6) via the limiting groove.

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