Low-resistance split type butterfly valve

Abstract

The utility model discloses a low-resistance split type butterfly valve which comprises a driving valve body (1) and a driven valve body (2). A rotatable rotating ring (11) is arranged at the top of the driving valve body (1), and a driven valve positioning pin (21) is arranged on the outer side wall of the driven valve body (2); relative to the driven valve positioning pin (21), a driven valve limiting hole (113) and a driven valve positioning pin groove (14) which are communicated with each other are sequentially formed in the inner side wall of the rotating ring (11) and the inner side wall of the driving valve body (1) from top to bottom. And a passive valve positioning pin sleeve (210) is sleeved on the passive valve positioning pin (21).

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of split butterfly valve, specifically, relates to a low resistance split butterfly valve. BACKGROUND

[0002] Split butterfly valve (also called alpha beta valve) is a device composed of active valve and passive valve, due to its convenience (passive valve is connected with active valve, through rotating ring compression pin, the limit rotating ring position is rotated, then the positioning pin on passive valve is extruded, passive valve is combined with active valve into an integral; and the handle of active shaft is pulled, the valve is opened, material transfer can be realized) and stability (passive valve flap and active valve flap are precisely attached, closed environment is realized, the sterile state of sterile material is ensured not to be damaged, or the diffusion of high activity and high toxicity material is prevented), is widely applied in biological medicine, nuclear industry and other scenes needing material closed transfer.

[0003] But due to the particularity of the application scene of the product, the rotating ring, the active valve body, the rotating ring compression pin and the passive valve positioning pin are generally made of the same metal material such as stainless steel, the passive valve sealing ring is extruded and sealed with the active valve sealing transition during the connecting operation, and the sliding friction between these matched parts, the extrusion of the sealing ring, not only the hand feeling is heavy, the friction between the parts is easily damaged, even directly causing damage and unable to slide, and the operation cannot continue.

[0004] If the gap between the parts is increased to reduce the friction between the parts, the adjustment directly affects the sealing transfer effect of the split butterfly valve, the leakage of material transfer is greatly improved, and the requirement of extremely low leakage is not met.

[0005] In summary, in order to solve the sliding friction between the matched parts during the operation of the split butterfly valve, ensure the attachment gap, improve the service life of the equipment, and improve the sealing performance level of the split butterfly valve closed transfer, the utility model improves a kind of anti-scratch and self-lubricating mechanism, to ensure the smooth operation of the split butterfly valve during operation, light hand feeling, high-grade sealing performance split butterfly valve. Utility model content

[0006] In order to make up for the above shortcomings, the utility model provides a kind of low resistance split butterfly valve, to improve the problems raised in the above background technology.

[0007] The utility model provides a low resistance split butterfly valve includes initiative valve body and passive valve body, the top of initiative valve body is provided with rotatable rotation circle, its characterized in that, the outside wall of passive valve body is provided with passive valve positioning pin, relative to passive valve positioning pin, passive valve limiting hole and passive valve positioning pin groove that communicate with each other are sequentially arranged from top to bottom on the inside wall of rotation circle and initiative valve body, passive valve positioning pin sleeve is equipped on passive valve positioning pin.

[0008] As the improvement of the low resistance split butterfly valve, the rotation circle is provided with a long hole, the long hole penetrates the rotation circle from top to bottom, a rotation circle fixing screw is arranged in the long hole, and the rotation circle fixing screw is fixedly connected with the initiative valve body after penetrating the rotation circle from top to bottom.

[0009] As the further improvement of the low resistance split butterfly valve, a sliding gasket is arranged between the head of the rotation circle fixing screw and the upper surface of the rotation circle.

[0010] As the further improvement of the low resistance split butterfly valve, a rotation circle fixing screw sleeve pipe is sleeved on the outer side of the joint part of the rotation circle fixing screw.

[0011] As the further improvement of the low resistance split butterfly valve, a rotation circle limiter is arranged between the rotation circle and the initiative valve body.

[0012] As the further improvement of the low resistance split butterfly valve, an upwardly protruding top side surface is arranged on the top end side wall of the initiative valve body, and a rotation circle limiting pin is arranged on the rotation circle limiter relative to the top side surface, the rotation circle limiting pin is embedded into the rotation circle from bottom to top, the lower end of the rotation circle limiting pin is in contact with the top end plane of the initiative valve body, and the lower end side surface of the rotation circle limiting pin is in contact with the inner side surface of the top side surface.

[0013] As the further improvement of the low resistance split butterfly valve, an initiative valve flap is arranged on the inner side bottom surface of the initiative valve body, and a passive valve flap is arranged on the outer side bottom surface of the passive valve body.

[0014] As the further improvement of the low resistance split butterfly valve, an initiative valve sealing ring is arranged between the initiative valve body and the initiative valve flap, and a passive valve sealing ring is arranged between the passive valve body and the passive valve flap.

[0015] As the further improvement of the low resistance split butterfly valve, the passive valve positioning pin sleeve, the sliding gasket and the rotation circle fixing screw sleeve pipe are all made of self-lubricating material.

[0016] In summary, the beneficial effects of this utility model are: 1. All friction components are provided with a material with a self-slip effect for transition, which greatly reduces the friction between metal materials, that is, reduces the wear between metal and metal parts. There is no need to replace the main components. If a fault occurs, only the material component with the self-slip effect needs to be replaced, which greatly reduces the maintenance cost.

[0017] 2. During operation, frictional resistance is reduced, making the operation of the rotating handle smoother. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 yes Figure 1 A top-view structural diagram;

[0021] Figure 3 yes Figure 2 EE section view (2:1);

[0022] Figure 4 yes Figure 2 BB section view (2:1);

[0023] Figure 5 yes Figure 2 FF section view (4:1). Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Example 1 Figures 1 to 5 A low-resistance split-type butterfly valve is presented, comprising a passive valve body 2 and an active valve body 1. For example... Figure 1 or Figure 2As shown, the top of the active valve body 1 is provided with a rotating ring assembly, which includes a rotating ring 11, a rotating ring handle 110, an elongated hole 111, a rotating ring fixing screw 112, and a passive valve limiting hole 113.

[0026] The rotating ring handle 110 is fixed to the outer side wall of the rotating ring 11 to assist in adjusting the rotating ring 11. The elongated hole 111 is an arc-shaped elongated hole (elongated groove) centered on the center of the rotating ring 11, evenly distributed on the rotating ring 11. The elongated hole 111 penetrates the rotating ring 11 from top to bottom, and a rotating ring fixing screw 112 is installed inside the elongated hole 111. The rotating ring fixing screw 112 is fixed to the top of the active valve body 1 after passing through the elongated hole 111. The passive valve limiting hole 113 is located on the inner side wall of the rotating ring 11. Corresponding to the passive valve limiting hole 113, a corresponding passive valve positioning pin groove 14 (e.g., ...) is provided on the inner side wall of the active valve body 1. Figure 4 (As shown). An active valve disc 12 is provided on the inner bottom surface of the active valve body 1, and a passive valve disc 22 is provided on the outer bottom surface of the passive valve body 2. An active valve sealing ring 13 is provided between the active valve body 1 and the active valve disc 12, and a passive valve sealing ring 23 is provided between the passive valve body 2 and the passive valve disc 22. The active shaft seat 100 and active shaft handle provided outside the active valve body 1 are conventional configurations in the prior art and not an improvement of this utility model; therefore, they will not be described further.

[0027] A number of rotating ring limiting pins 114 are provided on the bottom surface of the rotating ring 11. The number of limiting pins 114 can be set according to the size of the rotating ring 11, but generally at least three are required, evenly distributed. In this embodiment, the rotating ring limiting pins 114 are made of polyetheretherketone (PEEK) special engineering plastic, such as... Figure 5 As shown, the bottom of the rotating ring limiting pin 114 contacts the top surface 108 of the active valve body 1, preventing direct contact between the metal surface of the rotating ring 11 and the metal surface of the active valve body 1, thus avoiding wear of the mechanism. To limit the working position of the rotating ring 11, the top of the active valve body 1 has an upwardly protruding top surface 109 on its side wall, as shown... Figure 5 As shown, the bottom side of the rotating ring limiting pin 114 is in close contact with the inner wall of the top side surface 109. In the prior art, when the rotating ring 11 rotates, it makes contact with the top surface 108 and the top side surface 109 of the active valve body 1. However, in this embodiment, after adding the rotating ring limiting pin 114, it prevents the rotating ring 11 and the active valve body 1 from being scratched and damaged by the same material. The original surface contact between the rotating ring 11 and the active valve body 1 is improved to a point contact between the rotating ring limiting pin 114 and the active valve body 1. The contact area is small and the sliding resistance is also small.

[0028] like Figure 3As shown, a sliding washer 1122 is provided between the head of the rotating ring fixing screw 112 and the upper surface of the rotating ring 11. In this embodiment, the sliding washer 1122 is made of polyetheretherketone (PEEK) special engineering plastic. A rotating ring fixing screw sleeve 1121 is fitted on the outer side of the joint of the rotating ring fixing screw 112. The rotating ring fixing screw sleeve 1121 is also made of PEEK special engineering plastic.

[0029] A passive valve positioning pin 21 is provided on the outer wall of the passive valve body 2. The shape and size of the passive valve positioning pin 21 need to be determined according to the shape and size of the passive valve limiting hole 113 and the passive valve positioning pin groove 14. A passive valve positioning pin sleeve 210 is fitted on the passive valve positioning pin 21. In this embodiment, the passive valve positioning pin sleeve 210 is a bushing made of polyetheretherketone (PEEK) special engineering plastic. Figure 4 As shown, the passive valve limiting hole 113 and the passive valve positioning pin groove 14 mentioned above are interconnected and are connected sequentially from top to bottom on the inner sidewall of the rotating ring 11 and the active valve body 1.

[0030] In actual use, the passive valve positioning pin 21 reaches the passive valve positioning pin groove 14 through the passive valve limiting hole 113. Then, by rotating the rotating ring 11, the passive valve positioning pin 21 can be locked in the passive valve positioning pin groove 14. Because this product needs to achieve a sealing effect, in the above process, the sealing effect is mainly achieved by the compression of the active valve disc 12 and the passive valve disc 22. The squeezing force of the active valve disc 12 and the passive valve disc 22 is mainly achieved by the rotating ring 11 locking the passive valve positioning pin 21 in the passive valve positioning pin groove 14 during the rotation of the rotating ring 11. Therefore, in the prior art, without the passive valve positioning pin sleeve 210, the rotating ring 11 rotates and slides, squeezing the passive valve positioning pin 21, which easily causes metal wear and jamming. However, in this embodiment, after improvement, the passive valve positioning pin sleeve 210 can roll and slide at this point. This rolling and sliding effect is beneficial to the sliding + rolling squeezing displacement between the rotating ring 11 and the passive valve positioning pin 21, avoiding mutual scraping between the rotating ring 11 and the passive valve positioning pin 21. At this time, due to the force, the head of the rotating ring fixing screw 112 is subjected to a reaction force (such as... Figure 4As shown, the rotating ring 11 applies a downward force to the passive valve positioning pin 21, so at this time, the passive valve positioning pin 21 applies an upward reaction force to the rotating ring 11. Furthermore, due to the relative rotation between the rotating ring 11 and the active valve body 1, without the sliding washer 1122, the sliding friction and squeezing between the head of the rotating ring 11 and the head of the rotating ring set screw 112 will inevitably cause scratching damage to these two sets of parts, requiring a very large rotational force, which can easily affect the operating feel. However, the sliding washer 1122 used in this embodiment, compared to metal materials, has slight compressive elasticity and self-lubrication. The rotating ring set screw 112 cooperates with the rotating ring 11, ensuring that the passive valve disc 22 and the active valve disc 12 are completely fitted together, directly improving the sealing performance. In order to prevent the joint of the rotating ring clamping screw 112 from scraping and sticking with the elongated hole 111 (long waist groove) of the rotating ring 11 and to prevent the contact of the same metal materials, a rotating ring fixing screw sleeve 1121 is fitted on the outside of the joint of the rotating ring fixing screw 112.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-resistance split-type butterfly valve, comprising an active valve body (1) and a passive valve body (2); wherein the top of the active valve body (1) is provided with a rotatable rotating ring (11), characterized in that, The passive valve body (2) is provided with a passive valve positioning pin (21) on its outer side wall; Relative to the passive valve positioning pin (21), the passive valve limiting hole (113) and the passive valve positioning pin groove (14) are arranged sequentially from top to bottom on the inner sidewalls of the rotating ring (11) and the active valve body (1). The passive valve positioning pin (21) is fitted with a passive valve positioning pin sleeve (210).

2. The low-resistance split-type butterfly valve according to claim 1, characterized in that, The rotating ring (11) is provided with an elongated hole (111) that extends from top to bottom through the rotating ring (11); A rotating ring fixing screw (112) is provided inside the elongated hole (111); The rotating ring fixing screw (112) passes through the rotating ring (11) from top to bottom and is fixedly connected to the active valve body (1).

3. A low-resistance split-type butterfly valve according to claim 2, characterized in that, A sliding washer (1122) is provided between the head of the rotating ring fixing screw (112) and the upper surface of the rotating ring (11).

4. A low-resistance split-type butterfly valve according to claim 2, characterized in that, The rotating ring fixing screw (112) is fitted with a rotating ring fixing screw sleeve (1121) on the outside of the joint portion.

5. A low-resistance split-type butterfly valve according to claim 1, characterized in that, A rotating ring limiter is provided between the rotating ring (11) and the active valve body (1).

6. A low-resistance split-type butterfly valve according to claim 5, characterized in that, The top sidewall of the active valve body (1) is provided with an upwardly protruding top side surface (109); Relative to the top side (109), the rotating ring limiter is set as the rotating ring limit pin (114); The rotating ring limiting pin (114) is embedded into the rotating ring (11) from bottom to top; The lower end of the rotating ring limiting pin (114) contacts the top plane (108) of the active valve body (1); The lower side of the rotating ring limiting pin (114) contacts the inner side of the top side (109).

7. A low-resistance split-type butterfly valve according to claim 1, characterized in that, The inner bottom surface of the active valve body (1) is provided with an active valve disc (12), and the outer bottom surface of the passive valve body (2) is provided with a passive valve disc (22).

8. A low-resistance split-type butterfly valve according to claim 1, characterized in that, An active valve sealing ring (13) is provided between the active valve body (1) and the active valve disc (12), and a passive valve sealing ring (23) is provided between the passive valve body (2) and the passive valve disc (22).

9. A low-resistance split-type butterfly valve according to any one of claims 1-8, characterized in that, The passive valve positioning pin sleeve (210), sliding washer (1122), and rotating ring fixing screw sleeve (1121) are all made of self-lubricating material.

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