High-sealing flange non-rising stem gate valve

Abstract

The utility model relates to the related field of non-rising stem gate valves, in particular to a high-sealing flange non-rising stem gate valve which comprises a non-rising stem gate valve body, a conveying pipe, a positioning ring, a supporting pipe, a sealing silica gel ring, a sealing gasket, a filter screen and the like. According to the non-rising stem gate valve, the supporting pipe, the sealing silica gel ring, the sealing gasket and the filter screen are arranged, the sealing performance between the mounting flange and the connecting flange is improved through the sealing silica gel ring, and the supporting pipe and the positioning ring are matched with the sealing gasket to further improve the sealing performance of the non-rising stem gate valve body connected with the conveying pipe; high sealing performance is achieved between the non-rising stem gate valve and an external pipeline, leakage of media conveyed by the non-rising stem gate valve is reduced, part of particle impurities in the media can be filtered through the arranged filter screen, abrasion generated by the particle impurity gate valve and the inner wall of the pipeline is reduced, the sealing face of the non-rising stem gate valve connecting pipeline can be smoother, and the sealing effect is better. The sealing performance of a connecting pipeline of the non-rising stem gate valve is further improved, and the practicability of the non-rising stem gate valve is improved.

Description

Technical Field

[0001] The utility model relates to the relevant field of concealed stem gate valves, in particular to a high-sealing flange concealed stem gate valve. Background Art

[0002] The concealed-stem gate valve is a type of valve whose main feature is that its stem thread and transmission device (such as handwheel) are not exposed outside the valve like the rising-stem gate valve, but are set inside the valve body. This means that when the valve is opened or closed, the valve stem will not move up and down with the rotation. From the outside of the valve, the valve stem seems to be stationary. This design makes the concealed-stem gate valve more suitable for occasions where space is limited or the valve stem needs to be prevented from being exposed.

[0003] The existing concealed-stem gate valve is usually connected to the external pipeline by connecting the flange on the concealed-stem gate valve when in use. However, the sealing performance of the connection between the flanges is poor, and medium leakage is likely to occur, thereby wasting resources. In addition, some of the medium transported by the concealed-stem gate valve may contain particulate impurities. When the particulate impurities flow through the pipeline and the valve, they are likely to cause wear on the internal surface of the valve body, the sealing surface and the inner wall of the pipeline, resulting in an uneven sealing surface, thereby affecting the tightness of the seal and easily causing medium leakage, thereby reducing the practicality of the concealed-stem gate valve. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a high-sealing flange concealed stem gate valve to solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-sealing flange non-rising stem gate valve, comprising a non-rising stem gate valve body, a mounting flange is respectively arranged at the left and right ends of the non-rising stem gate valve body, and a delivery pipe is respectively arranged at the left and right sides of the non-rising stem gate valve body, the delivery pipe is connected with the inner side of the non-rising stem gate valve body, and a connecting flange corresponding to the mounting flange is fixedly installed on the delivery pipe, a positioning ring is installed at the left and right ends of the inner side of the non-rising stem gate valve body and the inner side of the delivery pipe, and a supporting pipe is arranged between the non-rising stem gate valve body and the two positioning rings close to each other in the delivery pipe;

[0006] A sealing gasket that fits the support tube is fixedly disposed on the side surface of the positioning ring;

[0007] The two ends of the support pipe are movably extended into the inner side of the concealed stem gate valve body and the delivery pipe, and a sealing silicone ring is sleeved on the support pipe. A filter screen is fixed in the support pipe near the water inlet end of the concealed stem gate valve body, and the two ends of the sealing silicone ring are respectively tightly attached to the mounting flange and the connecting flange;

[0008] A connecting pipe embedded in the bottom of the supporting pipe is arranged below the filter screen, a drain pipe is movably sleeved at the bottom of the connecting pipe, and the drain pipe cooperates with the inner circle thread of the threaded hole opened at the bottom of the concealed stem gate valve body.

[0009] Preferably, a convex ring is provided on the positioning ring, an annular groove corresponding to the convex ring is provided on the support tube, and the sealing gasket is a curved structure corresponding to the convex ring and the annular groove.

[0010] Preferably, the inner rings of the positioning ring, the support tube, the convex ring and the sealing gasket are flush.

[0011] Preferably, the filter screen is arranged at an angle, and the connecting pipe and the sewage pipe are parallel to the filter screen.

[0012] Preferably, a threaded end cap is threadedly mounted on the bottom of the sewage pipe.

[0013] Preferably, a sewage valve is installed on the sewage pipe, and the sewage valve is higher than the bottom of the sewage pipe.

[0014] Preferably, a plurality of connection holes are provided on the mounting flange, the connecting flange and the sealing silicone ring, and the connection holes on the mounting flange, the connecting flange and the sealing silicone ring correspond to each other one by one.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a support tube, a sealing silicone ring, a sealing gasket and a filter screen. The sealing silicone ring improves the sealing performance between the installation flange and the connecting flange, and the support tube and the positioning ring cooperate with the sealing gasket to further improve the sealing performance of the non-stem gate valve body connected to the delivery pipe, so that the non-stem gate valve and the external pipeline have high sealing performance, and the leakage of the medium delivered by the non-stem gate valve is reduced. The filter screen can filter some particulate impurities in the medium, and the wear of the particulate impurities on the internal surface of the valve body, the sealing surface and the inner wall of the pipeline is reduced, which is conducive to making the sealing surface of the pipeline connected to the non-stem gate valve smoother, which is conducive to further improving the sealing performance of the pipeline connected to the non-stem gate valve, and improving the practicality of the non-stem gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the sewage pipe connection structure of the utility model.

[0019] Among them: concealed stem gate valve body -1, mounting flange -2, delivery pipe -3, connecting flange -4, positioning ring -5, support pipe -6, sealing silicone ring -7, convex ring -8, annular groove -9, sealing gasket -10, filter screen -11, connecting pipe -12, drain pipe -13, threaded end cover -14, drain valve -15, threaded hole -16. DETAILED DESCRIPTION

[0020] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0021] like Figure 1 As shown, the utility model provides a high-sealing flange concealed stem gate valve, comprising a concealed stem gate valve body 1, a mounting flange 2 is respectively arranged at the left and right ends of the concealed stem gate valve body 1, and a delivery pipe 3 is respectively arranged at the left and right sides of the concealed stem gate valve body 1, the delivery pipe 3 is connected with the inner side of the concealed stem gate valve body 1, and a connecting flange 4 corresponding to the mounting flange 2 is fixedly connected to the mounting flange 2 through the connecting flange 4 to realize the connection between the delivery pipe 3 and the concealed stem gate valve body 1;

[0022] Specifically, when in use, the two delivery pipes 3 are respectively connected to external equipment, wherein the delivery pipe 3 close to the water inlet end of the concealed stem gate valve body 1 is connected to the external medium delivery source, and the delivery pipe 3 close to the water outlet end of the concealed stem gate valve body 1 is connected to the external medium receiving equipment. After the concealed stem gate valve body 1 is opened, the medium is transported through the delivery pipe 3 in cooperation with the concealed stem gate valve body 1.

[0023] like Figure 1 and Figure 2 As shown, in this embodiment, a positioning ring 5 is installed at both ends of the inner side of the concealed stem gate valve body 1 and the inner side of the delivery pipe 3, and a support pipe 6 is arranged between the two positioning rings 5 ​​close to each other in the concealed stem gate valve body 1 and the delivery pipe 3;

[0024] The side surface of the positioning ring 5 is fixed with a sealing gasket 10 that fits the support tube 6, which is used to improve the sealing between the positioning ring 5 and the support tube 6 and further reduce the leakage of the medium;

[0025] The two ends of the support tube 6 are respectively movably extended into the inner side of the concealed stem gate valve body 1 and the delivery pipe 3, and are used to provide additional support for the concealed stem gate valve body 1 and the delivery pipe 3, and improve the stability of the concealed stem gate valve body 1 connecting the delivery pipe 3, and a sealing silicone ring 7 is sleeved on the support tube 6, and a filter screen 11 for filtering impurities in the medium is fixed in the support tube 6 near the water inlet end of the concealed stem gate valve body 1, and the two ends of the sealing silicone ring 7 are respectively closely attached to the mounting flange 2 and the connecting flange 4, and are used to improve the sealing between the mounting flange 2 and the connecting flange 4;

[0026] A connecting pipe 12 embedded in the bottom of the support pipe 6 is provided below the filter screen 11, and a drain pipe 13 is provided at the bottom of the connecting pipe 12. The drain pipe 13 cooperates with the inner thread of the threaded hole 16 opened at the bottom of the concealed stem gate valve body 1 to facilitate installation and removal of the drain pipe 13;

[0027] In this embodiment, a convex ring 8 is provided on the positioning ring 5, and an annular groove 9 corresponding to the convex ring 8 is provided on the support tube 6. The sealing gasket 10 is a curved structure corresponding to the convex ring 8 and the annular groove 9, so that the sealing performance of the support tube 6 connecting the positioning ring 5 can be further improved by cooperating with the annular groove 9 through the convex ring 8, thereby indirectly improving the sealing performance of the support tube 5 connecting the concealed stem gate valve body 1 and the delivery pipe 3, which is conducive to reducing the leakage of the medium;

[0028] The inner circles of the positioning ring 5, the support tube 6, the convex ring 8 and the sealing gasket 10 are flush, so that the transported medium can flow stably in the positioning ring 5, the support tube 6, the convex ring 8 and the sealing gasket 10;

[0029] In this embodiment, the filter screen 11 is tilted, and the connecting pipe 12 and the drain pipe 13 are parallel to the filter screen 11. The tilted installation allows the impurities or particles on the filter screen 11 to slide down naturally under the action of water flow or air flow, avoiding clogging the pores of the filter screen 11, thereby improving the filtration efficiency, and the tilted drain pipe 13 design allows the sediment to be discharged more easily;

[0030] In this embodiment, a threaded end cap 14 is installed on the bottom of the sewage pipe 13, so that the sewage in the sewage pipe 13 can be discharged outward after the threaded end cap 14 is turned and opened;

[0031] In this embodiment, a drain valve 15 is installed on the drain pipe 13, and the drain valve 15 is higher than the bottom of the drain pipe 13, so that after the drain valve 15 is opened, impurities on the filter screen 11 flow into the drain pipe 13, and form an accumulation between the drain valve 15 and the bottom of the inner side of the drain pipe 13, so that the drain valve 15 is closed later to discharge the sewage at the bottom of the inner side of the drain pipe 13 to the outside;

[0032] In this embodiment, a plurality of connection holes are provided on the mounting flange 2, the connecting flange 4 and the sealing silicone ring 7, and the connection holes on the mounting flange 2, the connecting flange 4 and the sealing silicone ring 7 correspond to each other, so that the mounting flange 2 and the connecting flange 4 can be fixed by passing external connecting bolts through the connecting holes, so as to realize the quick connection between the concealed stem gate valve body 1 and the delivery pipe 3;

[0033] In this embodiment, the sealing gasket 10 is made of silicone, which has good elasticity, good sealing performance, strong chemical stability, and more stable use process;

[0034] Specifically, when the medium flows in the non-distant stem gate valve body 1 and the delivery pipe 3 after the non-distant stem gate valve body 1 is opened, part of the particulate impurities in the medium are filtered out by the filter screen 11, and the filtered impurities flow downward along the filter screen 11 through the connecting pipe 12 and enter the sewage pipe 13, thereby reducing the particulate impurities in the medium, thereby reducing the wear of the particulate impurities on the inner surface of the non-distant stem gate valve body 1 and the inner wall of the delivery pipe 3, which is conducive to making the sealing surface of the non-distant stem gate valve body 1 connected to the delivery pipe 3 smoother, and is conducive to improving the sealing performance of the non-distant stem gate valve body 1 connected to the delivery pipe 3;

[0035] When the medium flows, the sealing silicone ring 7 is provided to improve the sealing between the mounting flange 2 and the connecting flange 4, thereby reducing the leakage of the medium. The support tube 6 provides auxiliary support for the connection between the concealed stem gate valve body 1 and the delivery pipe 3, thereby improving the stability of the connection between the concealed stem gate valve body 1 and the delivery pipe 3. At the same time, an additional layer of sealing is also provided for the concealed stem gate valve body 1 and the delivery pipe 3, thereby reducing the gap between the concealed stem gate valve body 1 and the delivery pipe 3. The support tube 6 and the positioning ring 5 cooperate with the sealing gasket 10 to improve the sealing of the support tube 6 connecting the concealed stem gate valve body 1 and the delivery pipe 3 respectively, thereby further reducing the leakage of the medium from the concealed stem gate valve body 1 and the delivery pipe 3 to the outside, thereby ensuring high sealing between the concealed stem gate valve and the pipeline, thereby facilitating the stable delivery of the medium.

[0036] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-sealing flange concealed stem gate valve, comprising a concealed stem gate valve body, a mounting flange is arranged at each of the left and right ends of the concealed stem gate valve body, and a delivery pipe is arranged at each of the left and right sides of the concealed stem gate valve body, the delivery pipe is connected to the inner side of the concealed stem gate valve body, and a connecting flange corresponding to the mounting flange is fixedly mounted on the delivery pipe; It is characterized in that A positioning ring is installed at both left and right ends of the inner side of the concealed stem gate valve body and the inner side of the delivery pipe, and a support pipe is arranged between the concealed stem gate valve body and the two positioning rings close to each other in the delivery pipe; A sealing gasket that fits the support tube is fixedly disposed on the side surface of the positioning ring; The two ends of the support pipe are movably extended into the inner side of the concealed stem gate valve body and the delivery pipe, and a sealing silicone ring is sleeved on the support pipe. A filter screen is fixed in the support pipe near the water inlet end of the concealed stem gate valve body, and the two ends of the sealing silicone ring are respectively tightly attached to the mounting flange and the connecting flange; A connecting pipe embedded in the bottom of the supporting pipe is arranged below the filter screen, a drain pipe is movably sleeved at the bottom of the connecting pipe, and the drain pipe cooperates with the inner circle thread of the threaded hole opened at the bottom of the concealed stem gate valve body.

2. According to claim 1, a high sealing flange concealed stem gate valve is characterized in that: The positioning ring is provided with a convex ring, the support tube is provided with an annular groove corresponding to the convex ring, and the sealing gasket is a curved structure corresponding to the convex ring and the annular groove.

3. According to claim 2, a high sealing flange concealed stem gate valve is characterized in that: The inner circles of the positioning ring, the supporting tube, the convex ring and the sealing gasket are flush.

4. According to claim 1, a high sealing flange concealed stem gate valve is characterized in that: The filter screen is arranged obliquely, and the connecting pipe and the sewage pipe are parallel to the filter screen.

5. According to claim 1, a high sealing flange concealed stem gate valve is characterized in that: The bottom thread of the sewage pipe is threadedly mounted with a threaded end cap.

6. According to claim 1, a high sealing flange concealed stem gate valve is characterized in that: A sewage discharge valve is installed on the sewage discharge pipe, and the sewage discharge valve is higher than the bottom of the sewage discharge pipe.

7. According to claim 1, a high sealing flange concealed stem gate valve is characterized in that: The mounting flange, the connecting flange and the sealing silicone ring are all provided with a plurality of connecting holes, and the connecting holes on the mounting flange, the connecting flange and the sealing silicone ring correspond to each other one by one.

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