Triple-eccentric hard butterfly valve with good sealing performance

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a three-eccentric hard butterfly valve with good sealing performance, which comprises a valve body, mounting discs arranged at two ends of the valve body, a valve seat arranged in the valve body and a transmission case, and is characterized in that a valve rod is arranged between the transmission case and the valve body and vertically penetrates through the valve body; the part, located in the valve body, of the valve rod is fixedly connected with a valve clack, a sealing ring is arranged on the valve clack, and an adjusting mechanism is arranged on the valve clack. The mounting groove is formed in the valve clack, the connecting screw rod drives the conical block to move downwards by rotating the rotating disc, the side wall of the conical block is in sliding fit with the side walls of the multiple clamping blocks at the bottom of the mounting groove, the multiple clamping blocks support the sealing ring, and the part, extending out of the valve clack, of the sealing ring is increased; a gap is prevented from being reserved in the contact face of the sealing ring and the valve seat, and the sealing performance of the valve clack and the valve seat is enhanced.

Description

Technical Field

[0001] The present application relates to the field of butterfly valves, and in particular to a three-eccentric hard butterfly valve with good sealing performance. Background Art

[0002] The triple eccentric butterfly valve is a high-performance butterfly valve. The unique design of the triple eccentric makes the metal hard seal more labor-saving. When the valve is opened and closed, there is no friction between the butterfly plate and the valve body during the rotation process. When the valve is closed, the increased torque of the transmission mechanism can provide a compensating seal, which greatly improves the sealing performance of the triple eccentric butterfly valve and prolongs the service life of the butterfly valve.

[0003] Referring to the Chinese patent application with the announcement number CN215410244U, a three-eccentric bidirectional hard-sealed butterfly valve is disclosed, wherein an upper connecting pipe is fixedly connected to the transmission component accommodating box, the upper connecting pipe is connected to the transmission component accommodating box, the upper connecting pipe is connected to the valve body, a butterfly plate is arranged in the valve body, the valve stem is fixedly connected to the butterfly plate, a first mounting edge is arranged at the edge of the left valve body, a second mounting edge is arranged at the edge of the right valve body, through holes are symmetrically arranged on the first mounting edge and the second mounting edge, bolts are arranged in the through holes, the bolts cooperate with nuts to compress and fix the left valve body and the right valve body, so that the butterfly valve can be more easily disassembled, and the butterfly plate can be more conveniently replaced;

[0004] However, in the prior art, during long-term continuous use, since the sealing ring on the valve disc is directly sleeved on the outside of the valve disc, there is constant friction between the side of the sealing ring and the valve seat as the valve stem rotates. In addition, due to the corrosion of the fluid, a gap may remain on the contact surface between the sealing ring and the valve seat, requiring frequent replacement of the sealing ring on the valve disc, which is troublesome to operate. For this reason, we have designed a three-eccentric hard butterfly valve with good sealing performance. Utility Model Content

[0005] A three-eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application can avoid leaving a gap between the contact surface of the sealing ring and the valve seat, enhance the sealing performance of the valve disc and the valve seat, and reduce the technical problem of the replacement frequency of the sealing ring.

[0006] The embodiment of the present application provides a three-eccentric hard butterfly valve with good sealing performance, comprising: a valve body, mounting plates arranged at both ends of the valve body, a valve seat and a transmission box arranged in the valve body, a valve stem is arranged between the transmission box and the valve body, the valve stem vertically penetrates the valve body, a valve disc is fixedly connected to the part of the valve stem located in the valve body, a sealing ring is arranged on the valve disc, and an adjusting mechanism is arranged on the valve disc, and the adjusting mechanism is used to adjust the contact area between the sealing ring and the valve seat to reduce the replacement frequency of the sealing ring;

[0007] The valve body is connected to the pipelines at both ends through the mounting plate, and the valve disc is rotated by turning the handwheel. When the valve disc rotates, the sealing ring on the valve disc separates from the inner wall of the valve seat. At this time, the fluid inside the valve body flows. The valve disc is rotated again to make the sealing ring on the valve disc contact with the inner wall of the valve seat again, thereby realizing the valve body cutting off the pipeline.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] 1. The present application provides an installation groove in the valve disc, and rotates the turntable to make the connecting screw drive the conical block to move downward. The side wall of the conical block and the side walls of multiple clamping blocks at the bottom of the installation groove slide with each other, so that the multiple clamping blocks support the sealing ring, and the part of the sealing ring extending out of the valve disc is increased. Through the extrusion of the sealing ring and the valve seat, a gap is avoided between the contact surface of the sealing ring and the valve seat, thereby enhancing the sealing performance of the valve disc and the valve seat.

[0010] 2. The present application adjusts the height of the turntable in the installation groove, thereby adjusting the portion of the sealing ring extending out of the valve disc, timely replenishing the worn portion of the sealing ring, and reducing the frequency of replacement of the sealing ring. The operation is simple and convenient.

[0011] In some embodiments, the valve flap is provided with a mounting groove, a plurality of limiting grooves are provided in the mounting groove, an inner thread is provided on the inner wall of the mounting groove, and a plurality of sliding grooves are correspondingly provided on the inner wall of the mounting groove located above the plurality of limiting grooves;

[0012] By adopting the above technical solution and opening the slide groove, the installation of the spring is facilitated, and the spring is used to fix the initial clamping block.

[0013] In some embodiments, the adjustment mechanism includes a turntable, the turntable is coaxially arranged in the installation groove, the turntable is provided with a screwing groove, a frustum is coaxially provided on the side of the turntable opposite to the screwing groove, and an external thread matching the internal thread is provided on the side wall of the turntable;

[0014] By adopting the above technical solution, a tool is inserted into the twisting groove to rotate the turntable, so that the turntable drives the frustum to move downward. Similarly, the turntable is rotated in the opposite direction to gradually separate the frustum from the installation groove.

[0015] A plurality of locking blocks are respectively arranged in a plurality of limiting grooves, a sliding block is provided on the locking block, a spring is provided between the end of the sliding block away from the frustum and the inner wall of the mounting groove, the spring is arranged in the slide groove, a locking groove is opened on the locking block, the inner side of the sealing ring is locked in the locking grooves of the plurality of locking blocks, and the outer side of the sealing ring extends out of the mounting groove.

[0016] By adopting the above technical solution, the side walls of the cone and the side walls of the multiple clamping blocks at the bottom of the installation groove slide with each other, so that the multiple clamping blocks prop up the inner side of the sealing ring, squeeze the sealing ring, and increase the part of the valve disc extending out of the outer side of the sealing ring. The increased part of the valve disc extending out of the outer side of the sealing ring is squeezed by the valve seat, thereby avoiding a gap between the contact surface of the sealing ring and the valve seat, and supplementing the part of the sealing ring side and the valve seat that is worn and corroded by the fluid, thereby enhancing the sealing of the valve disc and the valve seat.

[0017] Optionally, an abutment column is coaxially provided at one end of the frustum away from the turntable.

[0018] In this embodiment, a transmission assembly is provided in the transmission box, and a connecting rod is coaxially fixedly connected to the transmission assembly, and a hand wheel is coaxially provided at one end of the connecting rod away from the transmission box. Optionally, the transmission assembly is a worm and a worm wheel, wherein the worm is coaxially fixedly connected to the connecting rod, and the worm is meshed with the worm wheel for transmission, and the worm wheel is coaxially fixedly connected to the valve stem;

[0019] By adopting the above technical solution, when the handwheel is rotated, the connecting rod drives the worm to rotate, and then the worm and the worm wheel are meshed and transmitted, so that the valve stem coaxially fixedly connected to the worm wheel rotates, and finally the valve disc and the valve seat are opened and closed. At the same time, according to the structural characteristics of the worm and the worm wheel, the self-locking of the valve is realized.

[0020] In some embodiments, the valve flap is provided with a plurality of bolt mounting holes, the bolt mounting holes are provided with mounting bolts, the sealing ring is provided with through holes at positions corresponding to the mounting bolts, and the bottom of the valve body is provided with an end cover;

[0021] Furthermore, a fixing nail is provided in the clamping block, and the fixing nail is inserted into the inner side of the sealing ring to fix one side of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of a triple-eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the upper and lower isotropic axis side of a triple eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application;

[0025] Figure 3A side view of a triple-eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the internal structure of a valve disc of a triple-eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the connection structure between the turntable and the cone of a triple-eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the clamping block structure of a triple-eccentric hard butterfly valve with good sealing performance provided in an embodiment of the present application.

[0029] Among them, the reference numerals in the figure are:

[0030] 1. Valve body; 2. Mounting plate; 3. Valve seat; 4. Handwheel; 5. Connecting rod; 6. Transmission box; 7. Valve stem; 8. Valve disc; 9. End cover; 10. Mounting groove; 11. Limiting groove; 12. Clamping block; 13. Clamping groove; 14. Slider; 15. Spring; 16. Sealing ring; 17. Internal thread; 18. External thread; 19. Cone; 20. Twist groove; 21. Bolt mounting hole; 22. Turntable. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] It should be noted that, in the present application, words such as "in the present embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or explanations. Any embodiment or design described in the present application as "in the present embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in the present embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The triple eccentric butterfly valve is a type of high-performance butterfly valve. The unique design of the triple eccentric makes metal hard sealing more labor-saving. When the valve is opened and closed, there is no friction between the butterfly plate and the valve body during the rotation process. When the valve is closed, the increased torque of the transmission mechanism can provide a compensating seal, which greatly improves the sealing performance of the triple eccentric butterfly valve and extends the service life of the butterfly valve.

[0039] During long-term continuous use, the sealing ring on the valve disc in the related technology is directly mounted on the outside of the valve disc. As the valve stem rotates, there is constant friction between the edge of the sealing ring and the valve seat. Coupled with the corrosion of the fluid, a gap may remain on the contact surface between the sealing ring and the valve seat, necessitating frequent replacement of the sealing ring on the valve disc.

[0040] Based on this, in order to improve the problem in the related technology that due to the constant friction between the edge of the sealing ring and the valve seat, coupled with the corrosion of the fluid, a gap may be left on the contact surface between the sealing ring and the valve seat, and the sealing ring on the valve disc needs to be replaced frequently, the embodiment of the present application provides the following solution.

[0041] See also Figures 1 to 6 A three-eccentric hard butterfly valve with good sealing performance comprises: a valve body 1, mounting plates 2 arranged at both ends of the valve body 1, a valve seat 3 and a transmission box 6 arranged in the valve body 1, a valve stem 7 is arranged between the transmission box 6 and the valve body 1, the valve stem 7 vertically penetrates the valve body 1, a valve disc 8 is fixedly connected to the part of the valve stem 7 located in the valve body 1, a sealing ring 16 is arranged on the valve disc 8, and an adjusting mechanism is arranged on the valve disc 8, and the adjusting mechanism is used to adjust the contact area between the sealing ring 16 and the valve seat 3 so as to reduce the replacement frequency of the sealing ring 16;

[0042] See also Figures 2 to 6 The adjustment mechanism includes a turntable 22, which is coaxially arranged in the installation groove 10, and a screwing groove 20 is opened on the turntable 22. A frustum 19 is coaxially arranged on the side of the turntable 22 facing away from the screwing groove 20, and an external thread 18 matching the internal thread 17 is arranged on the side wall of the turntable 22;

[0043] By inserting a tool into the screwing groove 20, the turntable 22 is rotated, so that the turntable 22 drives the frustum 19 to move downward. Similarly, the turntable 22 is rotated in the opposite direction to gradually separate the frustum 19 from the installation groove 10.

[0044] The adjustment mechanism further includes a plurality of clamping blocks 12, which are respectively arranged in the plurality of limit grooves 11, and a slider 14 is arranged on the clamping block 12, and a spring 15 is arranged between the end of the slider 14 away from the frustum 19 and the inner wall of the mounting groove 10, and the spring 15 is arranged in the slide groove, and a clamping groove 13 is opened on the clamping block 12, and the inner side of the sealing ring 16 is clamped in the clamping groove 13 of the plurality of clamping blocks 12, and the outer side of the sealing ring 16 extends out of the mounting groove 10;

[0045] The effect of such arrangement is that the side walls of the cone 19 and the side walls of the multiple clamping blocks 12 at the bottom of the mounting groove 10 slide with each other, so that the multiple clamping blocks 12 prop up the inner side of the sealing ring 16, squeeze the sealing ring 16, and increase the portion of the sealing ring 16 extending out of the valve disc 8. The increased portion of the sealing ring 16 extending out of the valve disc 8 is squeezed against the valve seat 3, thereby avoiding a gap between the contact surfaces of the sealing ring 16 and the valve seat 3.

[0046] See also Figure 4 and Figure 5 The valve disc 8 is provided with a mounting groove 10, a plurality of limiting grooves 11 are provided in the mounting groove 10, an inner thread 17 is provided on the inner wall of the mounting groove 10, and a plurality of sliding grooves are correspondingly provided on the inner wall of the mounting groove 10 located above the plurality of limiting grooves 11;

[0047] The effect of such arrangement is that the external thread 18 cooperates with the internal thread 17 on the inner wall of the installation groove 10 so that the turntable 22 moves into the installation groove 10 during rotation. At the same time, the opening of the slide groove facilitates the installation of the spring 15.

[0048] See also Figure 4 and Figure 5 , an abutment column is coaxially provided at one end of the cone 19 away from the rotating disk 22;

[0049] The effect of this arrangement is that since the locking block 12 is arranged in the limiting groove 11, the outer walls of the plurality of limiting grooves 11 form an annular wall. When the cone 19 continues to move into the mounting groove 10, the inclined surface of the cone 19 eventually separates from the inclined surface of the locking block 12. At this time, the abutment column abuts against the inner wall of the mounting groove 10 of the valve disc 8.

[0050] See also Figure 1 and Figure 2 A transmission assembly is provided in the transmission box 6, and the transmission assembly is coaxially fixedly connected with a connecting rod 5, and a handwheel 4 is coaxially provided at one end of the connecting rod 5 away from the transmission box 6. Optionally, the transmission assembly is a worm and a worm wheel, wherein the worm is coaxially fixedly connected with the connecting rod 5, and the worm is meshed with the worm wheel for transmission, and the worm wheel is coaxially fixedly connected with the valve stem 7;

[0051] The effect of this arrangement is that when the handwheel 4 is rotated, the connecting rod 5 drives the worm to rotate, and then the worm and the worm gear are meshed and driven, so that the valve stem 7 coaxially fixedly connected to the worm gear rotates, and finally the valve flap 8 and the valve seat 3 are opened and closed.

[0052] See also Figure 1 and Figure 2 A plurality of bolt mounting holes 21 are provided on the valve disc 8, mounting bolts are provided in the bolt mounting holes 21, through holes are provided at positions corresponding to the mounting bolts on the sealing ring 16, and an end cover 9 is provided at the bottom of the valve body 1. Furthermore, fixing nails are provided in the clamping block 12, and the fixing nails are inserted into the inner side of the sealing ring 16. When the clamping block 12 props up the inner side of the sealing ring 16 and squeezes the sealing ring 16, through holes are provided at positions corresponding to the mounting bolts on the sealing ring 16 to facilitate the sealing ring 16 filled in the mounting groove 10 to extend outward.

[0053] From the above, we can see that the working principle of this application is as follows:

[0054] By inserting a tool into the screwing groove 20, the turntable 22 is rotated, so that the turntable 22 drives the cone 19 to move downward, and the side walls of the cone 19 and the side walls of the multiple clamping blocks 12 at the bottom of the installation groove 10 slide with each other, so that the multiple clamping blocks 12 prop up the inner side of the sealing ring 16, squeeze the sealing ring 16, and increase the part of the sealing ring 16 that extends out of the valve disc 8. The increased part of the sealing ring 16 that extends out of the valve disc 8 and the valve seat 3 are squeezed to avoid a gap between the contact surface of the sealing ring 16 and the valve seat 3, and supplement the part of the side of the sealing ring 16 that is worn by the valve seat 3 and corroded by the fluid, thereby enhancing the sealing performance of the valve disc 8 and the valve seat 3.

[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A triple eccentric hard butterfly valve with good sealing performance, comprising a valve body (1), mounting plates (2) arranged at both ends of the valve body (1), a valve seat (3) arranged in the valve body (1) and a transmission box (6), characterized in that: A valve stem (7) is provided between the transmission box (6) and the valve body (1), the valve stem (7) vertically penetrates the valve body (1), the portion of the valve stem (7) located inside the valve body (1) is fixedly connected to a valve flap (8), a sealing ring (16) is provided on the valve flap (8), and an adjusting mechanism is provided on the valve flap (8), the adjusting mechanism is used to adjust the contact area between the sealing ring (16) and the valve seat (3) so as to reduce the replacement frequency of the sealing ring (16); The valve flap (8) is provided with a mounting groove (10), a plurality of limiting grooves (11) are provided in the mounting groove (10), an inner thread (17) is provided on the inner wall of the mounting groove (10), and a plurality of sliding grooves are correspondingly provided on the inner wall of the mounting groove (10) located above the plurality of limiting grooves (11); The adjusting mechanism comprises: a rotating disk (22), the rotating disk (22) being coaxially arranged in the mounting groove (10), the rotating disk (22) being provided with a screwing groove (20), a frustum (19) being coaxially arranged on a side of the rotating disk (22) facing away from the screwing groove (20), and an external thread (18) matching the internal thread (17) being arranged on a side wall of the rotating disk (22); A plurality of clamping blocks (12) are respectively arranged in a plurality of limiting grooves (11); a slider (14) is arranged on the clamping block (12); a spring (15) is arranged between an end of the slider (14) away from the cone (19) and an inner wall of the mounting groove (10); the spring (15) is arranged in the slide groove; a clamping groove (13) is provided on the clamping block (12); the inner side of the sealing ring (16) is clamped in the clamping grooves (13) of the plurality of clamping blocks (12); and the outer side of the sealing ring (16) extends out of the mounting groove (10).

2. A triple eccentric hard butterfly valve with good sealing performance according to claim 1, characterized in that: An abutment column is coaxially arranged at one end of the frustum (19) away from the rotating disk (22).

3. The triple-eccentric hard butterfly valve with good sealing performance according to claim 1 is characterized in that: A transmission assembly is arranged in the transmission box (6), and a connecting rod (5) is coaxially fixedly connected to the transmission assembly. A hand wheel (4) is coaxially arranged at one end of the connecting rod (5) away from the transmission box (6).

4. The triple eccentric hard butterfly valve with good sealing performance according to claim 1 is characterized in that: The valve flap (8) is provided with a plurality of bolt mounting holes (21), mounting bolts are arranged in the bolt mounting holes (21), through holes are opened at positions corresponding to the mounting bolts on the sealing ring (16), and an end cover (9) is provided at the bottom of the valve body (1).

5. The triple eccentric hard butterfly valve with good sealing performance according to claim 1 is characterized in that: A fixing nail is arranged inside the clamping block (12), and the fixing nail is inserted into the inner side of the sealing ring (16).

Images