A check butterfly valve

Abstract

The utility model discloses a check butterfly valve, include: valve body, inner bushing, a pair of expansion type sealing ring and a pair of linkage type sealing assembly. The both ends of valve body are integrative forming and have inner bushing. A pair of expansion type sealing ring is respectively set in the outside of inner bushing. A pair of linkage type sealing assembly fixed assembly is in the both sides of valve body, and linkage type sealing assembly includes thrust ring, and the side away from valve body of thrust ring is inserted and is equipped with sealing pad, is equipped with multiple even distribution's inserted positioning hole on the thrust ring, and the side close to thrust ring of sealing pad is integrative forming and has multiple even distribution's positioning column, and multiple positioning columns are inserted in inserted positioning hole, and the side close to valve body of thrust ring is fixedly connected with multiple groups even distribution's support connecting rod. The utility model discloses a check butterfly valve through setting linkage type sealing assembly, has reduced the situation that sealing ring misplacement appears in the assembly process of check butterfly valve, has improved the stability and reliability of check butterfly valve to assemble seal.

Description

Technical Field

[0001] This utility model belongs to the technical field of check butterfly valves, and specifically relates to a check butterfly valve. Background Technology

[0002] A check butterfly valve is a type of valve that uses a butterfly valve disc to prevent backflow of the medium. When the medium flows in the forward direction, the butterfly valve disc moves open under the pressure of the medium, allowing the medium to pass through; when the medium flows in the reverse direction, the butterfly valve disc closes under the action of spring force and medium pressure, thereby preventing backflow of the medium.

[0003] The most common check butterfly valves are mainly composed of a valve body, valve stem, valve disc and torsion spring. In the actual assembly process, they are assembled between a pair of flanges using a wafer-type assembly method. Therefore, check butterfly valves are also called wafer-type butterfly check valves.

[0004] In the actual assembly process of existing check butterfly valves, the connection and sealing method is mainly to install sealing rings at the ports. Since there are no corresponding bolt holes at both ends of the check butterfly valve, the sealing rings installed on both sides of the check butterfly valve are prone to misalignment due to the force of clamping flange during actual assembly. This results in poor assembly and sealing stability of the check butterfly valve.

[0005] Therefore, it is necessary to provide a check butterfly valve to address the aforementioned technical problems.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a check butterfly valve that can improve the assembly sealing performance of the check butterfly valve.

[0008] To achieve the above objectives, a specific embodiment of this utility model provides a check butterfly valve, comprising: a valve body, an inner liner, a pair of expansion sealing rings, and a pair of linkage sealing components.

[0009] Both ends of the valve body are integrally formed with inner liners. A pair of expansion sealing rings are respectively sleeved on the outside of the inner liners, and both expansion sealing rings are hollow. A pair of linkage sealing assemblies are fixedly assembled on both sides of the valve body. The linkage sealing assembly includes a thrust ring, which is slidably sleeved on the outside of the inner liners. A sealing gasket is inserted into the side of the thrust ring away from the valve body, and multiple sets of evenly distributed support connecting rods are fixedly connected to the side of the thrust ring close to the valve body.

[0010] In one or more embodiments of this utility model, the ends of both inner liners away from the valve body are chamfered. Chamfering the inner liners improves the smoothness of insertion and connection between the inner liners and the pipe. Anti-detachment grooves are provided on the outer sides of both inner liners, and the expansion sealing ring is fitted within these grooves. The anti-detachment grooves effectively limit and prevent the expansion sealing ring from detaching.

[0011] In one or more embodiments of this utility model, the thrust ring has a plurality of evenly distributed insertion positioning holes, and the sealing gasket has a plurality of evenly distributed positioning posts integrally formed on the side close to the thrust ring, with each positioning post inserted into the insertion positioning hole. The insertion and engagement of the positioning posts with the insertion positioning holes serves to prevent the sealing gasket from detaching, ensuring the stability of the sealing gasket in use.

[0012] In one or more embodiments of this utility model, multiple evenly distributed fixing grooves are provided on both sides of the valve body. These fixing grooves are used to assemble and fix the control air box. Each of the multiple fixing grooves contains a fixedly connected control air box, and the support connecting rod is slidably assembled within the control air box. The control air box serves to limit the assembly and guide the sliding movement of the support connecting rod.

[0013] In one or more embodiments of this utility model, a piston plate is integrally formed at one end of the supporting connecting rod located inside the control air box. The movement of the piston plate compresses and delivers air within the control air box. A compression-sealed cavity is formed between the piston plate and the control air box. The movement of the piston plate compresses the compression-sealed cavity, thereby allowing the air within the compression-sealed cavity to be discharged along the guiding air passage.

[0014] In one or more embodiments of this utility model, a plurality of evenly distributed support springs are arranged inside the compression sealing cavity, and the two ends of the plurality of support springs are fixedly connected to the control air box and the piston plate, respectively. The contraction and reset of the plurality of support springs provide support and limit the piston plate.

[0015] In one or more embodiments of this utility model, a plurality of evenly distributed connecting air pipes are fixedly connected to one side of the pair of expansion sealing rings near the valve body. Each of the connecting air pipes is connected to the expansion sealing ring, and the connecting air pipes are correspondingly arranged with the supporting connecting rod. The connecting air pipes connect the air passage to the expansion sealing ring, facilitating the transport of air from the air passage to the expansion sealing ring. This, in turn, improves the sealing effect between the outer wall of the inner liner and the inner wall of the connecting pipe through the expansion of the sealing ring.

[0016] In one or more embodiments of this utility model, the valve body has multiple evenly distributed air passages, and the two ends of the multiple air passages are respectively connected to the compression sealing cavity and the connecting air pipe. By connecting the connecting air pipe and the compression sealing cavity through the air passages, air in the compression sealing cavity can be transported to the expansion sealing ring along the air passages and the connecting air pipe, thereby linking the expansion state of the expansion sealing ring with the compression state of the compression sealing cavity.

[0017] Compared with the prior art, the check butterfly valve disclosed in this utility model reduces the possibility of misalignment of the sealing ring during the assembly process by setting a linkage sealing component, thereby improving the stability and reliability of the assembly and sealing of the check butterfly valve. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of a check valve in one embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram of the structure of the linkage sealing assembly in one embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure at point B; Figure 5 This is a perspective view of a check valve in one embodiment of the present invention; Figure 6 This is a schematic diagram of the assembly of a check valve in one embodiment of the present invention.

[0020] Explanation of key figure labels: 1-Valve body, 101-Inner liner, 2-Expansion sealing ring, 3-Linkage sealing assembly, 301-Thrust ring, 302-Sealing gasket, 303-Support connecting rod, 304-Positioning column, 305-Control air box, 306-Piston plate, 307-Support spring, 308-Guiding air passage, 4-Connecting air pipe. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, 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, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] like Figures 1 to 6 As shown, a check butterfly valve in one embodiment of the present invention includes: a valve body 1, an inner liner 101, a pair of expansion sealing rings 2 and a pair of linkage sealing components 3.

[0023] like Figure 1 As shown, both ends of the valve body 1 are integrally formed with inner liner sleeves 101. The inner liner sleeves 101 are inserted into the connecting pipe to assist in the assembly and positioning of the valve body 1, ensuring the stability of clamping and fixing the valve body 1. At the same time, the outer wall of the inner liner sleeve 101 and the inner wall of the connecting pipe can be used to assist in the assembly and sealing of the valve body 1.

[0024] Specifically, the ends of both inner liners 101 away from the valve body 1 are chamfered. By chamfering the inner liners 101, the smoothness of the insertion and connection between the inner liners 101 and the pipeline is improved.

[0025] like Figures 1 to 2 As shown, anti-detachment grooves are provided on the outer sides of both inner liner cylinders 101, and the expansion sealing ring 2 is fitted inside the anti-detachment grooves. The expansion sealing ring 2 is prevented from detaching by providing anti-detachment grooves.

[0026] like Figures 1 to 2 As shown, a pair of expansion sealing rings 2 are respectively fitted onto the outer side of the inner liner 101, and both expansion sealing rings 2 are hollow. The expansion sealing rings 2 are expanded by supplying air into them, thereby ensuring the sealing effect of the expansion sealing rings 2.

[0027] like Figures 1 to 4 As shown, a pair of linked sealing assemblies 3 are fixedly assembled on both sides of the valve body 1. The linked sealing assembly 3 includes a thrust ring 301, which is slidably sleeved on the outside of the inner liner 101. The thrust ring 301 serves to limit the assembly of the sealing gasket 302.

[0028] like Figures 1 to 4 As shown, a sealing gasket 302 is inserted and fitted onto the side of the thrust ring 301 away from the valve body 1. The sealing gasket 302 seals and limits the connection between the end face of the connecting pipe and the end face of the valve body 1.

[0029] like Figures 1 to 4 As shown, the thrust ring 301 has multiple evenly distributed insertion positioning holes. The sealing gasket 302, close to the side of the thrust ring 301, has multiple evenly distributed positioning posts 304 integrally formed, all of which are inserted into the insertion positioning holes. The insertion and engagement of the positioning posts 304 with the insertion positioning holes prevents the sealing gasket 302 from falling out, ensuring the stability of the sealing gasket 302 in use.

[0030] like Figures 1 to 2 As shown, multiple sets of evenly distributed support connecting rods 303 are fixedly connected to the side of the thrust ring 301 close to the valve body 1. The support connecting rods 303 provide support and fixation for the thrust ring 301. Multiple evenly distributed fixing grooves are provided on both sides of the valve body 1. The control air box 305 is assembled and fixed by providing these fixing grooves.

[0031] like Figures 1 to 3 As shown, control air boxes 305 are fixedly connected to multiple fixed grooves, and support connecting rods 303 are slidably assembled within the control air boxes 305. The control air boxes 305 serve to limit the assembly and guide the sliding movement of the support connecting rods 303.

[0032] like Figures 1 to 2 As shown, a piston plate 306 is integrally formed at one end of the support connecting rod 303 located inside the control air box 305. The movement of the piston plate 306 compresses and delivers air within the control air box 305. Specifically, a compression sealing cavity is formed between the piston plate 306 and the control air box 305. The movement of the piston plate 306 compresses the compression sealing cavity, thereby allowing the air within the compression sealing cavity to be discharged along the guide air passage 308.

[0033] like Figures 1 to 2 As shown, multiple evenly distributed support springs 307 are arranged inside the compression sealing cavity. The two ends of the multiple support springs 307 are fixedly connected to the control air box 305 and the piston plate 306, respectively. The contraction and reset of the multiple support springs 307 provide support and limit the piston plate 306.

[0034] like Figures 1 to 4 As shown, a pair of expansion-type sealing rings 2 are fixedly connected to a plurality of evenly distributed connecting air pipes 4 on the side close to the valve body 1. All connecting air pipes 4 are connected to the expansion-type sealing rings 2, and are correspondingly arranged with the supporting connecting rod 303. The connecting air pipes 4 connect the guiding air passage 308 and the expansion-type sealing rings 2, facilitating the transport of air from the guiding air passage 308 to the expansion-type sealing rings 2 along the connecting air pipes 4. This expansion of the sealing rings 2 improves the sealing effect between the outer wall of the inner liner 101 and the inner wall of the connecting pipe.

[0035] like Figures 1 to 2 As shown, the valve body 1 has multiple evenly distributed air passages 308, with both ends of the multiple air passages 308 connected to the compression sealing cavity and the connecting air pipe 4, respectively. The air passages 308 connect the connecting air pipe 4 and the compression sealing cavity, allowing air in the compression sealing cavity to be transported along the air passages 308 and the connecting air pipe 4 to the expansion sealing ring 2, thus linking the expansion state of the expansion sealing ring 2 with the compression state of the compression sealing cavity.

[0036] In practical use, when assembling the valve body 1, the inner liner 101 can be inserted into the connecting pipe to make a preliminary connection between the connecting pipe and the valve body 1 through the inner liner 101. Subsequently, bolts can be used to connect the bolt group of the connecting pipe.

[0037] When the connecting pipe clamps the valve body 1, the sealing gasket 302 can seal and limit the end face of the valve body 1 and the connecting pipe. At the same time, the thrust ring 301, under the action of the clamping force of the bolt group, will drive the support connecting rod 303 to compress the support spring 307, so that the piston plate 306 can compress the compression sealing cavity. The air in the compression sealing cavity can be transported to the expansion sealing ring 2 along the air passage 308. The expansion of the expansion sealing ring 2 can seal the outer wall of the inner liner 101 and the inner wall of the connecting pipe, improving the sealing reliability and stability of the check butterfly valve during clamping assembly.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A check butterfly valve, characterized in that, include: The valve body has an integrally formed inner liner at both ends; A pair of expansion sealing rings are respectively fitted on the outside of the inner liner, and both of the expansion sealing rings are hollow. A pair of linked sealing assemblies are fixedly assembled on both sides of the valve body. The linked sealing assembly includes a thrust ring, which is slidably sleeved on the outside of the inner liner. A sealing gasket is inserted into the side of the thrust ring away from the valve body. Multiple sets of evenly distributed support connecting rods are fixedly connected to the side of the thrust ring close to the valve body.

2. A check valve according to claim 1, characterized in that, The ends of the pair of inner liner cylinders away from the valve body are chamfered, and anti-detachment grooves are provided on the outer sides of the pair of inner liner cylinders. The expansion sealing ring is fitted inside the anti-detachment groove.

3. A check valve according to claim 1, characterized in that, The thrust ring has multiple evenly distributed insertion positioning holes, and the sealing gasket has multiple evenly distributed positioning posts integrally formed on the side close to the thrust ring, with each positioning post inserted into the insertion positioning hole.

4. A check valve according to claim 3, characterized in that, Multiple evenly distributed fixing grooves are provided on both sides of the valve body, and a control air box is fixedly connected in each of the multiple fixing grooves. The support connecting rod is slidably assembled in the control air box.

5. A check valve according to claim 4, characterized in that, The support connecting rod has a piston plate integrally formed at one end inside the control air box, and the piston plate and the control air box cooperate to form a compression sealing cavity.

6. A check valve according to claim 5, characterized in that, The compression sealing cavity is provided with a plurality of evenly distributed support springs, and the two ends of the plurality of support springs are fixedly connected to the control air box and the piston plate, respectively.

7. A check valve according to claim 6, characterized in that, A pair of expansion sealing rings are fixedly connected to a plurality of evenly distributed connecting air pipes on the side close to the valve body. The plurality of connecting air pipes are all connected to the expansion sealing rings, and the plurality of connecting air pipes are correspondingly arranged with the supporting connecting rod.

8. A check valve according to claim 7, characterized in that, The valve body has multiple evenly distributed air passages, and the two ends of the multiple air passages are respectively connected to the compression sealing cavity and the connecting air pipe.

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