Pin-free double-eccentric high-performance butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and provides a pin-free type double-eccentric high-performance butterfly valve which comprises a pin-free type butterfly valve body and a butterfly plate, hexagonal grooves are formed in the upper end and the lower end of the butterfly plate respectively, two valve rods are arranged on the pin-free type butterfly valve body, hexagonal insertion blocks are fixedly installed at one ends of the two valve rods respectively, and the hexagonal insertion blocks are inserted into the hexagonal grooves respectively. Two hexagonal grooves are formed in the butterfly plate, the two hexagonal inserting blocks are connected with the two hexagonal grooves in an inserted mode, two round holes are formed in the butterfly plate, locking mechanisms are arranged in mounting grooves in the two hexagonal inserting blocks, one end of each locking mechanism is connected with the corresponding round hole in an inserted mode, and a rubber ring and a fixing assembly are arranged in the pin-free butterfly valve body. Through the hexagonal groove, the hexagonal inserting block, the locking mechanism and the round hole, the valve rod and the butterfly plate are rapidly fixed, meanwhile, the compressive strength of the valve rod is greatly improved, the service life of the valve rod is prolonged, the use cost of the valve rod is reduced, compared with a through connecting hole, the coaxiality of the connecting hole is higher, the machining technology is simple, and the machining precision is higher.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically to a pinless double eccentric high-performance butterfly valve. Background Technology

[0002] Double eccentric butterfly valves, also known as high-performance butterfly valves, are regulating and shut-off devices in water pipelines. Compared with centerline butterfly valves, double eccentric butterfly valves are more resistant to high pressure, have a longer service life, and better stability. The pinless double eccentric high-performance butterfly valve is a special butterfly valve design, characterized by the absence of pins on the butterfly plate. This design makes the valve operate more smoothly and reduces friction and wear.

[0003] Chinese patent CN215861795U discloses a pinless high-performance double eccentric butterfly valve, comprising a valve body, which is the main installation structure of the equipment, with a pre-set silencing groove on the outer surface of the valve body; an insert located inside the valve body, with a sealing ring fitted to the outer surface of the insert; a butterfly plate located in the middle of the valve body, with one end of the butterfly plate having a hollow structure; a cover located at the bottom of the valve body, with a buffer rod connected inside the cover; and a packing gland located at the top of the valve body, with a first valve stem connected inside the packing gland, and screws symmetrically arranged inside the packing gland. This pinless high-performance double eccentric butterfly valve, by setting the valve stem as a split type, rationally utilizes the flatness of the upper and lower valve stems to drive the opening and closing of the butterfly plate, avoiding the use of straight or angled pins, increasing the minimum cross-sectional area of ​​the valve stem to improve its torque, reducing the loss and deformation caused by the movement of the butterfly plate, and improving the overall strength of the valve body.

[0004] However, the following problems were found in the implementation of the relevant technology: more precise alignment is required during installation, which increases the assembly difficulty. In addition, since the butterfly plate is connected to the valve body through the connecting hole through the valve stem on its side, stress concentration may occur during use, especially in high pressure or large diameter valves. Under long-term use, this stress concentration may cause fatigue damage to the connection parts and affect the service life of the valve. Utility Model Content

[0005] This invention proposes a pinless double eccentric high-performance butterfly valve, which solves the problems in related technologies where more precise alignment is required during installation, increasing assembly difficulty. Furthermore, since the butterfly plate is connected to the valve body through the connecting hole on its side via the valve stem, stress concentration may occur during use, especially in high-pressure or large-diameter valves. Under long-term use, this stress concentration may lead to fatigue damage at the connection points, affecting the service life of the valve.

[0006] The technical solution of this utility model is as follows: a pinless double eccentric high-performance butterfly valve, comprising a pinless butterfly valve body and a butterfly plate, wherein hexagonal grooves are provided at both the upper and lower ends of the butterfly plate.

[0007] The pinless butterfly valve body is provided with two valve stems, and one end of each valve stem is fixedly installed with a hexagonal plug, and the two hexagonal plugs are respectively inserted into the two hexagonal grooves;

[0008] The butterfly plate has two round holes, and each of the two hexagonal plugs is provided with a locking mechanism in its mounting slot, with one end of the locking mechanism being inserted into the round hole.

[0009] The inside of the pinless butterfly valve body is provided with a rubber ring and a fixing component, and the rubber ring is fixedly installed on the butterfly plate by the fixing component;

[0010] A first annular plate is fixedly installed on the valve stem. Two insertion slots are symmetrically opened on the top of the first annular plate. A locking component is provided on the valve body of the pinless butterfly valve body, and the locking component is inserted into the insertion slot.

[0011] A fixed cylinder is fixedly installed on one side of the pinless butterfly valve body via a flange, and a buffer mechanism is provided inside the fixed cylinder.

[0012] Preferably, a fixing bracket is fixedly installed on the valve body of the pinless butterfly valve body, a plug-in bracket is inserted into the fixing bracket, a first positioning rod is fixedly installed on the inner bottom wall of the plug-in bracket, and the top of the first positioning rod is inserted into the fixing bracket.

[0013] A first spring is provided on the outer side wall of the first positioning rod, and the first spring is located between the plug-in bracket and the fixing bracket.

[0014] Preferably, the fixing component includes a fixing ring disposed inside the body of the pinless butterfly valve, and the fixing ring is located on one side of the butterfly plate. The fixing ring and the butterfly plate have a threaded hole that communicates with each other, and a screw is threaded into the inner side of the threaded hole.

[0015] Preferably, both the fixing ring and the butterfly plate have annular grooves on one side, and the rubber ring is located inside the annular groove.

[0016] Preferably, the buffer mechanism includes a second arc-shaped plate fixedly installed on the inner wall of the fixed cylinder. A plurality of second springs are fixedly installed in a circular array on one side of the second arc-shaped plate, and a buffer cylinder is fixedly installed at the other end of the plurality of second springs. The buffer cylinder is horn-shaped.

[0017] Preferably, a plurality of second positioning rods are fixedly installed on the buffer cylinder in a circular array, and the other end of each of the plurality of second positioning rods is inserted into the second arc-shaped plate, and the second spring is located on the outer wall of the second positioning rod.

[0018] Preferably, the locking mechanism includes a T-shaped cylinder disposed in the mounting groove of the hexagonal insert, and one end of the T-shaped cylinder penetrates through one side wall of the hexagonal insert and is inserted into the circular hole. A third spring is disposed inside the T-shaped cylinder, and one end of the third spring is fixedly connected to the hexagonal insert.

[0019] The working principle and beneficial effects of this utility model are as follows:

[0020] 1. The valve stem and butterfly plate are quickly fixed by means of hexagonal grooves, hexagonal inserts, locking mechanism and round holes. At the same time, the compressive strength of the valve stem is greatly improved, the service life of the valve stem is increased, the use cost of the valve stem is reduced, and the coaxiality of the connecting hole is higher than that of the through connecting hole, and the processing technology is simple and the processing accuracy is higher.

[0021] 2. The spring force of the first spring pushes the plug-in bracket, so that the bottom end of the plug-in bracket is inserted into the plug-in slot on the first annular plate, thereby locking the valve stem and the butterfly plate on the pinless butterfly valve body. This prevents maintenance and repair personnel from accidentally touching the pinless butterfly valve body during daily use, thus opening the pinless butterfly valve body and improving safety. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0024] Figure 2 A structural schematic diagram of the locking component is provided for this utility model;

[0025] Figure 3 A cross-sectional structural diagram of the pinless butterfly valve body proposed in this utility model is provided.

[0026] Figure 4 This utility model proposes Figure 3 Enlarged structural diagram at point A in the diagram;

[0027] Figure 5 A cross-sectional view of the fixing cylinder is provided for this utility model;

[0028] Figure 6 A schematic diagram of the hexagonal groove structure is provided for this utility model;

[0029] Figure 7 A cross-sectional view of the hexagonal insert block is provided for this utility model.

[0030] In the diagram: 1. Pinless butterfly valve body; 2. Rubber ring;

[0031] 3. Fixing components; 31. Retaining ring; 32. Screw;

[0032] 4. First annular plate;

[0033] 5. Locking assembly; 51. Fixing bracket; 52. Plug-in bracket; 53. First positioning rod; 54. First spring;

[0034] 6. Fixed cylinder; 7. Second arc plate; 8. Second spring; 9. Buffer cylinder; 10. Second positioning rod; 11. Butterfly plate; 12. Hexagonal groove; 13. Valve stem; 14. Hexagonal insert; 15. T-shaped cylinder; 16. Round hole. Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0036] Example 1

[0037] Please see Figure 1 - Figure 7 A pinless double eccentric high-performance butterfly valve includes a pinless butterfly valve body 1 and a butterfly plate 11, with hexagonal grooves 12 provided at both the upper and lower ends of the butterfly plate 11.

[0038] The body 1 of the pinless butterfly valve is provided with two valve stems 13. One end of each valve stem 13 is fixedly installed with a hexagonal plug 14, and the two hexagonal plugs 14 are respectively inserted into the two hexagonal grooves 12.

[0039] Two round holes 16 are provided on the butterfly plate 11. Locking mechanisms are provided in the mounting slots of the two hexagonal plugs 14, and one end of the locking mechanism is inserted into the round hole 16.

[0040] The body 1 of the pinless butterfly valve is provided with a rubber ring 2 and a fixing component 3, and the rubber ring 2 is fixedly installed on the butterfly plate 11 by the fixing component 3.

[0041] A first annular plate 4 is fixedly installed on the valve stem 13. Two insertion slots are symmetrically opened on the top of the first annular plate 4. A locking component 5 is provided on the valve body of the pinless butterfly valve body 1, and the locking component 5 is inserted into the insertion slot.

[0042] This utility model provides a pinless double eccentric high-performance butterfly valve. During installation, the hexagonal insert 14 is inserted into the hexagonal groove 12. Simultaneously, the locking mechanism, in cooperation with the circular hole 16, quickly fixes the valve stem 13 to the butterfly plate 11, significantly improving the valve stem's compressive strength and service life. Furthermore, compared to a through-hole connection, the connection hole offers higher coaxiality, simpler processing, and higher precision. Finally, the rubber ring 2 is fixed to the disc plate 11 using the fixing component 3, thereby enhancing the pinless butterfly valve's performance. The sealing effect of the valve body 1 makes it less prone to leakage in the pinless butterfly valve body 1. At the same time, with the cooperation of the fixing component 3, the worn rubber ring 2 can be easily replaced. Afterwards, when the disc is in the closed state, the bottom of the locking component 5 will insert into the insertion groove on the first annular plate 4, thereby locking the valve stem 13 and the disc 11 of the pinless butterfly valve body 1. This prevents maintenance and repair personnel from accidentally touching the pinless butterfly valve body 1 during daily use and opening the pinless butterfly valve body 1, thus improving safety.

[0043] Furthermore, a fixing bracket 51 is fixedly installed on the valve body of the pinless butterfly valve body 1, and a plug-in bracket 52 is inserted into the fixing bracket 51. A first positioning rod 53 is fixedly installed on the inner bottom wall of the plug-in bracket 52, and the top of the first positioning rod 53 is inserted into the fixing bracket 51.

[0044] A first spring 54 is provided on the outer wall of the first positioning rod 53, and the first spring 54 is located between the plug-in bracket 52 and the fixing bracket 51.

[0045] Specifically, the spring force of the first spring 54 pushes the plug-in bracket 52, thereby causing the plug-in bracket 52 to descend stably under the action of the first positioning rod 53 and the fixing bracket 51, and the bottom end of the plug-in bracket 52 to be inserted into the plug-in groove on the first annular plate 4. This locks the valve stem 13 and the butterfly plate 11 on the pinless butterfly valve body 1, thereby preventing maintenance and repair personnel from accidentally touching the pinless butterfly valve body 1 during daily use and causing the pinless butterfly valve body 1 to be opened.

[0046] Furthermore, the fixing component 3 includes a fixing ring 31 disposed inside the pinless butterfly valve body 1, and the fixing ring 31 is located on one side of the butterfly plate 11. Both the fixing ring 31 and the butterfly plate 11 have annular grooves on one side, and the rubber ring 2 is located inside the annular groove. The fixing ring 31 and the butterfly plate 11 have threaded holes that are connected to each other, and the inner side of the threaded hole is threaded with a screw 32.

[0047] Specifically, the screw 32, through the threaded hole, allows the retaining ring 31 to be stably fixed on the disc 11 of the pinless butterfly valve body 1, and clamps the rubber ring 2, so that the rubber ring 2 can be stably fixed on the disc 11. Conversely, the screw 32 in the threaded hole can be unscrewed manually, so that the worn rubber ring 2 can be easily replaced, thereby avoiding the impact on the sealing effect of the pinless butterfly valve body 1.

[0048] Furthermore, the locking mechanism includes a T-shaped cylinder 15 disposed in the mounting groove of the hexagonal insert 14, and one end of the T-shaped cylinder 15 penetrates through one side wall of the hexagonal insert 14 and is inserted into the round hole 16. A third spring is disposed inside the T-shaped cylinder 15, and one end of the third spring is fixedly connected to the hexagonal insert 14.

[0049] Specifically, when the hexagonal insert 14 is inserted into the hexagonal groove 12, the T-shaped cylinder 15 will be parallel to the round hole 16. Then, under the push of the third spring, one end of the T-shaped cylinder 15 will be inserted into the round hole 16, so that the butterfly plate 11 can be stably connected and fixed to the valve stem 13.

[0050] Example 2

[0051] Based on Embodiment 1, in this embodiment: a fixed cylinder 6 is fixedly installed on one side of the pinless butterfly valve body 1 via a flange. A buffer mechanism is provided inside the fixed cylinder 6. The buffer mechanism includes a second arc-shaped plate 7 fixedly installed on the inner wall of the fixed cylinder 6. Multiple second springs 8 are fixedly installed in a circular array on one side of the second arc-shaped plate 7. A buffer cylinder 9 is fixedly installed at the other end of the multiple second springs 8. The buffer cylinder 9 is horn-shaped.

[0052] The technical solution provided in this embodiment is as follows: When the butterfly plate 11 on the body 1 of the pinless butterfly valve is opened, the water flows through the butterfly plate 11 and rushes towards the horn-shaped buffer cylinder 9. Then the buffer cylinder 9 squeezes the second spring 8 on the second arc plate 7. Under the action of the second spring 8, the water flow can be buffered to a certain extent, thereby reducing the pressure impact in the pipeline and preventing the occurrence of destructive water hammer.

[0053] Furthermore, multiple second positioning rods 10 are fixedly installed on the buffer cylinder 9 in a circular array, and the other end of each of the multiple second positioning rods 10 is inserted into the second arc-shaped plate 7. The second spring 8 is located on the outer wall of the second positioning rod 10.

[0054] Specifically, the second positioning rod 10 ensures the stability of the buffer cylinder 9 during buffering, and also prevents the second spring 8 from bending during buffering.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pinless double eccentric high-performance butterfly valve, comprising a pinless butterfly valve body (1) and a butterfly plate (11), characterized in that, The butterfly plate (11) has hexagonal grooves (12) at both the top and bottom ends. The pinless butterfly valve body (1) is provided with two valve stems (13), and one end of each valve stem (13) is fixedly installed with a hexagonal plug (14), and the two hexagonal plugs (14) are respectively inserted into the two hexagonal grooves (12); Two round holes (16) are provided on the butterfly plate (11), and a locking mechanism is provided in the mounting groove of each of the two hexagonal plugs (14), and one end of the locking mechanism is inserted into the round hole (16); The inside of the pinless butterfly valve body (1) is provided with a rubber ring (2) and a fixing component (3), and the rubber ring (2) is fixedly installed on the butterfly plate (11) by the fixing component (3); A first annular plate (4) is fixedly installed on the valve stem (13). Two insertion slots are symmetrically opened on the top of the first annular plate (4). A locking component (5) is provided on the valve body of the pinless butterfly valve body (1), and the locking component (5) is inserted into the insertion slot. The pinless butterfly valve body (1) has a fixed cylinder (6) fixedly installed on one side by a flange, and the fixed cylinder (6) is provided with a buffer mechanism inside.

2. The pinless double eccentric high-performance butterfly valve according to claim 1, characterized in that: A fixing bracket (51) is fixedly installed on the valve body of the pinless butterfly valve body (1). A plug-in bracket (52) is inserted into the fixing bracket (51). A first positioning rod (53) is fixedly installed on the inner bottom wall of the plug-in bracket (52), and the top of the first positioning rod (53) is inserted into the fixing bracket (51). A first spring (54) is provided on the outer side wall of the first positioning rod (53), and the first spring (54) is located between the plug-in bracket (52) and the fixing bracket (51).

3. The pinless double eccentric high-performance butterfly valve according to claim 1, characterized in that: The fixing component (3) includes a fixing ring (31) disposed inside the pinless butterfly valve body (1), and the fixing ring (31) is located on one side of the butterfly plate (11). The fixing ring (31) and the butterfly plate (11) are provided with a threaded hole that communicates with each other, and a screw (32) is threadedly connected to the inside of the threaded hole.

4. The pinless double eccentric high-performance butterfly valve according to claim 3, characterized in that: Both the fixing ring (31) and the butterfly plate (11) have annular grooves on one side, and the rubber ring (2) is located inside the annular groove.

5. The pinless double eccentric high-performance butterfly valve according to claim 1, characterized in that: The buffer mechanism includes a second arc-shaped plate (7) fixedly installed on the inner wall of the fixed cylinder (6). A plurality of second springs (8) are fixedly installed in a circular array on one side of the second arc-shaped plate (7). The other ends of the plurality of second springs (8) are fixedly installed together with a buffer cylinder (9), and the buffer cylinder (9) is horn-shaped.

6. A pinless double eccentric high-performance butterfly valve according to claim 5, characterized in that: Multiple second positioning rods (10) are fixedly installed in a circular array on the buffer cylinder (9), and the other end of each of the multiple second positioning rods (10) is inserted into the second arc plate (7). The second spring (8) is located on the outer wall of the second positioning rod (10).

7. The pinless double eccentric high-performance butterfly valve according to claim 1, characterized in that: The locking mechanism includes a T-shaped cylinder (15) disposed in the mounting groove of the hexagonal insert (14), and one end of the T-shaped cylinder (15) penetrates through one side wall of the hexagonal insert (14) and is inserted into the round hole (16). A third spring is disposed inside the T-shaped cylinder (15), and one end of the third spring is fixedly connected to the hexagonal insert (14).

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