Leakage-proof flange

Abstract

According to the technical scheme, the anti-leakage flange is characterized by comprising a flange body, the flange body is fixedly connected with a first connecting disc and a second connecting disc which are arranged on the outer side of the flange body in a sleeving mode, the flange body is further fixedly connected with an extension pipe used for being connected with a liquid outlet, and the inner diameter of the extension pipe is smaller than that of the flange body; the inner diameter of the extension pipe is smaller than that of the flange body, the length of the extension pipe is larger than that of the flange body, and the inner wall of the extension pipe is provided with a backflow inlet, a backflow channel communicated with the backflow inlet and a backflow outlet communicated with the backflow channel. Leakage caused by the fact that impact on the flange body exceeds a threshold value due to the too high flow speed of liquid is prevented, and the effect of dealing with leakage of a high-flow-speed liquid conveying pipeline is achieved.

Description

Technical Field

[0001] The utility model relates to a flange, more specifically, to an anti-leakage flange. Background Art

[0002] Flange, also known as flange flange or flange, is a part that connects shafts to each other and is used to connect pipe ends or equipment inlets and outlets, such as reducer flanges. Flanges usually refer to detachable connecting parts composed of a disc body, a gasket and bolts that are interconnected as a group of combined sealing structures. The structure is simple and easy to install, but in high-flow liquid delivery systems, the liquid is prone to an instantaneous flow rate surge. For example, at the moment of opening a valve, the specific manifestation of the surge in flow rate is that the amount of liquid passing through is too large, which will produce a large impact pressure on the flange. Ordinary flanges are prone to deformation and leakage under such impact. Therefore, a high-strength leak-proof flange that can cope with leakage in high-flow liquid delivery pipelines is needed.

[0003] In view of the above reasons, how to deal with leakage in a high-flow rate liquid delivery pipeline is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the prior art, an anti-leakage flange is provided, which can cope with leakage of a high-flow rate liquid conveying pipeline.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: an anti-leakage flange, comprising a flange body, the flange body being fixedly connected with a first connecting plate and a second connecting plate arranged on the outside of the flange body, the flange body being also fixedly connected with an extension tube for connecting to a liquid outlet, the inner diameter of the extension tube being smaller than the inner diameter of the flange body, the length of the extension tube being greater than the length of the flange body, the inner wall of the extension tube being provided with a reflux inlet, a reflux channel connected to the reflux inlet, and a reflux outlet connected to the reflux channel.

[0006] In summary, the above technical scheme has the following beneficial effects: the first connecting plate and the second connecting plate are used to connect the liquid inlet device and the liquid outlet device respectively, and the extension tube needs to be directly inserted into the liquid outlet, so the inner diameter of the extension tube is consistent with the inner diameter of the liquid outlet, and the inner diameter of the extension tube needs to be set smaller than the inner diameter of the flange body, so that when the flow rate of the liquid reaches the limit, the flow rate of the liquid flowing into the flange body will be slowed down due to the ample space, thereby reducing the impact pressure on the flange body, and the length of the extension tube is greater than the length of the flange body, so that when the liquid flows through the extension tube, even if the inner diameter of the extension tube is greater than the inner diameter of the liquid outlet, so that the liquid flow rate exceeds the threshold, the flow rate can be reduced in the extension tube first, and the extension tube is directly inserted into the liquid outlet, so the impact pressure on the extension tube will be first dispersed in the liquid outlet and the equipment or pipeline connected to the liquid outlet, so that the situation where the liquid flows too fast at the liquid outlet and directly impacts the flange body can be avoided, and the flange body can be prevented from leaking at the connection due to the impact pressure exceeding the threshold, which plays a role in dealing with leakage of high-flow rate liquid delivery pipelines;

[0007] The reflux inlet on the inner wall of the extension tube, the reflux channel connected to the reflux inlet, and the reflux outlet connected to the reflux channel can form a reflux mechanism, and a plurality of reflux mechanisms are provided in the inner wall of the extension tube. When the instantaneous flow velocity of the liquid is too fast and there is no time to reduce the flow velocity in the extension tube, the pressure of the liquid on the surroundings will surge. At this time, the mass of the liquid per unit volume passing through the extension tube can be reduced by reflux. When the liquid passes through the reflux inlet, due to the large hydraulic pressure, part of the liquid will enter the reflux inlet and flow out from the reflux outlet through the reflux channel. Since this can effectively reduce the instantaneous flow velocity of the liquid at the reflux inlet, and the reflux outlet far away from the reflux inlet is not a place where the instantaneous flow velocity of the liquid is too high, the refluxed liquid can smoothly merge and merge into the liquid flowing there, thereby playing a role in dealing with leakage of high-flow rate liquid delivery pipelines.

[0008] The utility model reduces the flow rate of the liquid by arranging an extension pipe with an inner diameter smaller than the inner diameter of the flange body and a reflux mechanism, thereby preventing the liquid flow rate from being too high and causing the impact on the flange body to exceed a threshold and cause leakage, thereby playing a role in coping with leakage of high-flow-rate liquid delivery pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of a leakage-proof flange;

[0010] Figure 2 It is a cross-sectional view of the utility model.

[0011] Reference numerals: 1, flange body; 2, first connection plate; 3, second connection plate; 4, extension tube;

[0012] 11. Elastic gasket;

[0013] 41. Reflux inlet; 42. Reflux channel; 43. Reflux outlet; 44. Deformation joint; 45. Gentle slope; 46. Elastic part; 47. Elastic connecting sleeve; 48. Chamfer. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0015] Reference Figure 1-2 As shown, a leakage-proof flange comprises a flange body 1, the flange body 1 is fixedly connected with a first connection plate 2 and a second connection plate 3 arranged on the outside of the flange body 1, the flange body 1 is also fixedly connected with an extension tube 4 for connecting a liquid outlet, the inner diameter of the extension tube 4 is smaller than the inner diameter of the flange body 1, the length of the extension tube 4 is greater than the length of the flange body 1, and the inner wall of the extension tube 4 is provided with a reflux inlet 41, a reflux channel 42 communicating with the reflux inlet 41, and a reflux outlet 43 communicating with the reflux channel 42;

[0016] The first connection plate 2 and the second connection plate 3 are used to connect the liquid inlet device and the liquid outlet device respectively, and the extension tube 4 needs to be directly inserted into the liquid outlet, so the inner diameter of the extension tube 4 is consistent with the inner diameter of the liquid outlet, and the inner diameter of the extension tube 4 needs to be set smaller than the inner diameter of the flange body 1, so that when the flow rate of the liquid reaches the limit, the flow rate of the liquid flowing into the flange body 1 will be slowed down due to the ample space, thereby reducing the impact pressure on the flange body 1, and the length of the extension tube 4 is greater than the length of the flange body 1, so that when the liquid flows through the extension tube 4, even if the inner diameter of the extension tube 4 is greater than the inner diameter of the liquid outlet, so that the liquid flow rate exceeds the threshold, the flow rate can be reduced in the extension tube 4 first, and the extension tube 4 is directly inserted into the liquid outlet, so the impact pressure on the extension tube 4 will be first dispersed in the liquid outlet and the equipment or pipeline connected to the liquid outlet, so that the situation that the liquid flows too fast at the liquid outlet and directly impacts the flange body 1 can be avoided, and the flange body 1 can be prevented from leaking at the connection due to the impact pressure exceeding the threshold, which plays a role in dealing with leakage of high-flow rate liquid delivery pipelines;

[0017] The reflux inlet 41 on the inner wall of the extension tube 4, the reflux channel 42 connected to the reflux inlet 41, and the reflux outlet 43 connected to the reflux channel 42 can form a reflux mechanism, and a plurality of reflux mechanisms are provided in the inner wall of the extension tube 4. When the instantaneous flow velocity of the liquid is too fast and there is no time to reduce the flow velocity in the extension tube 4, the pressure of the liquid on the surroundings will increase sharply. At this time, the mass of the liquid per unit volume passing through the extension tube 4 can be reduced by reflux. When the liquid passes through the reflux inlet 41, due to the large hydraulic pressure, part of the liquid will enter the reflux inlet 41 and flow out from the reflux outlet 43 through the reflux channel 42. Since this can effectively reduce the instantaneous flow velocity of the liquid at the reflux inlet 41, and the reflux outlet 43 far away from the reflux inlet 41 is not a place where the instantaneous flow velocity of the liquid is too high, the refluxed liquid can smoothly merge and merge into the liquid flowing there, thereby playing a role in dealing with leakage of a high-flow rate liquid delivery pipeline.

[0018] The utility model reduces the flow rate of the liquid by providing an extension tube 4 whose inner diameter is smaller than the inner diameter of the flange body 1 and a reflux mechanism, thereby preventing the liquid flow rate from being too high and causing the impact on the flange body 1 to exceed a threshold and cause leakage, thereby playing a role in coping with leakage of high-flow-rate liquid delivery pipelines.

[0019] Furthermore, the extension tube 4 is also provided with two symmetrically arranged deformation seams 44;

[0020] The deformation seam 44 can divide the extension tube 4 into two parts, so that the extension tube 4 can cope with thermal expansion and contraction. In addition, since the material used to make the flange has a certain elasticity, the deformation seam 44 can allow the extension tube 4 to be inserted into the liquid outlet whose inner diameter is slightly smaller than the outer diameter of the extension tube 4. The elastic force strengthens the fit between the extension tube 4 and the inner wall of the liquid outlet, reduces the gap between the extension tube 4 and the inner wall of the liquid outlet, and plays a role in coping with leakage of high-flow rate liquid delivery pipelines.

[0021] Furthermore, the reflux inlet 41 is disposed on a side of the extension tube 4 facing the flange body 1 , and the reflux inlet 41 is fixedly connected with a gentle slope 45 disposed toward a direction close to the reflux channel 42 ;

[0022] The reflux outlet 43 is disposed on a side of the extension pipe 4 away from the flange body 1;

[0023] The reflux channel 42 is curved toward the reflux outlet 43 and is arranged toward the direction close to the flange body 1;

[0024] The gentle slope 45 can guide the liquid entering the reflux inlet 41 due to hydraulic pressure to flow smoothly into the reflux channel 42. The reflux inlet 41 is arranged on the side of the extension tube 4 facing the flange body 1, which can not only solve the problem of the instantaneous excessive flow rate of the liquid itself through reflux, but also guide the refluxed liquid when the liquid refluxes in the flange body 1, avoiding the increase of pressure on the flange body 1 due to the conflict of liquid flow direction, and playing a role in dealing with the leakage of the high-flow rate liquid delivery pipeline;

[0025] The reflux outlet 43 is arranged on the side of the extension tube 4 away from the flange body 1, and is arranged as close to the liquid outlet as possible, so that the time for handling the excessive instantaneous flow rate of the liquid can be effectively increased, and the liquid at the location is prevented from still being in a state of excessive instantaneous flow rate when the reflux liquid flows out from the reflux outlet 43;

[0026] In addition, the reflux channel 42 is arranged in a bend toward the reflux outlet 43 in a direction close to the flange body 1, so that the flow direction of the liquid flowing out of the reflux outlet 43 can conform to the direction of the liquid flowing in the extension tube 4, so that the reflux liquid can smoothly flow into the extension tube 4, preventing blockage at the reflux outlet 43 due to conflict of flow directions.

[0027] Furthermore, the extension tube 4 is also fixedly connected with an elastic member 46 disposed at the deformation joint 44;

[0028] The extension tube 4 is also fixedly connected to an elastic connection sleeve 47 fixedly connected to the flange body 1. The elastic connection sleeve 47 is fixedly connected to an elastic member 46 and is arranged at one end of the return inlet 41 facing the flange body 1.

[0029] Since the extension tube 4 will produce a cross-section at the deformation seam 44, the liquid will easily enter the gap between the extension tube 4 and the inner wall of the liquid outlet when impacting the cross-section. Therefore, the elastic connecting sleeve 47 and the elastic member 46 are provided to strengthen the fit between the extension tube 4 and the inner wall of the liquid outlet, prevent the liquid from impacting the cross-section and entering the gap between the extension tube 4 and the inner wall of the liquid outlet, and play a role in dealing with leakage of high-flow rate liquid delivery pipelines.

[0030] Furthermore, a chamfer 48 is provided on the side of the extension tube 4 away from the flange body 1;

[0031] The outer diameter of the extension tube 4 is consistent with the inner diameter of the flange body 1, and the flange body 1 is fixedly connected with an elastic gasket 11;

[0032] The chamfer 48 can facilitate the installation of the extension tube 4. Since the flange body 1 and the extension tube 4 are fixedly connected and the length cannot be changed, there is also a threshold for the instantaneous flow rate of the liquid that the extension tube 4 can handle. The instantaneous flow rate of the liquid can be gradually reduced by connecting multiple extension tubes 4. The outer diameter of the extension tube 4 is consistent with the inner diameter of the flange body 1, which can facilitate the connection between the extension tube 4 and the flange body 1. The elastic gasket 11 can fill the gap formed by the chamfer 48 on the extension tube 4 and the inner wall of the flange body 1 to prevent liquid from flowing between the extension tube 4 and the inner wall of the flange body 1.

[0033] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A leakage-proof flange, characterized in that: The invention comprises a flange body (1), wherein the flange body (1) is fixedly connected to a first connection plate (2) and a second connection plate (3) arranged on the outside of the flange body (1), and the flange body (1) is also fixedly connected to an extension tube (4) for connecting a liquid outlet, wherein the inner diameter of the extension tube (4) is smaller than the inner diameter of the flange body (1), the length of the extension tube (4) is greater than the length of the flange body (1), and the inner wall of the extension tube (4) is provided with a reflux inlet (41), a reflux channel (42) connected to the reflux inlet (41), and a reflux outlet (43) connected to the reflux channel (42).

2. The anti-leakage flange according to claim 1, characterized in that: The extension tube (4) is also provided with two symmetrically arranged deformation seams (44).

3. The anti-leakage flange according to claim 1, characterized in that: The reflux inlet (41) is arranged on a side of the extension tube (4) facing the flange body (1), and the reflux inlet (41) is a gentle slope (45) arranged in a direction close to the reflux channel (42).

4. The anti-leakage flange according to claim 3, characterized in that: The reflux outlet (43) is arranged on a side of the extension pipe (4) away from the flange body (1).

5. The anti-leakage flange according to claim 4, characterized in that: The return channel (42) is arranged in a curved path towards the return outlet (43) and in a direction close to the flange body (1).

6. The anti-leakage flange according to claim 2, characterized in that: The extension tube (4) is also fixedly connected to an elastic member (46) provided at the deformation joint (44).

7. The anti-leakage flange according to claim 6, characterized in that: The extension tube (4) is also fixedly connected to an elastic connection sleeve (47) fixedly connected to the flange body (1); the elastic connection sleeve (47) is fixedly connected to the elastic member (46) and is arranged at one end of the return inlet (41) facing the flange body (1).

8. The anti-leakage flange according to claim 1, characterized in that: The extension tube (4) is provided with a chamfer (48) on the side away from the flange body (1).

9. The anti-leakage flange according to claim 8, characterized in that: The outer diameter of the extension tube (4) is consistent with the inner diameter of the flange body (1), and the flange body (1) is fixedly connected with an elastic gasket (11).

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