A backflow prevention rubber joint

Abstract

The utility model discloses a kind of anti-backflow rubber joints, comprising: rubber joint body, both ends outer wall of the rubber joint body are fixedly installed flange sheet, the flange sheet is used to cooperate with pipeline fixed connection;Anti-backflow component, including channel pipe, the input end of the channel pipe is equipped with input hole, the output end of the input hole is equipped with expansion hole, the output end of the expansion hole is equipped with sliding hole, the inner wall of the expansion hole and sliding hole is slidably connected flow guide sleeve, the output end of the channel pipe is threadedly connected second limiting nut, spring is equipped between the inner wall of the flow guide sleeve and second limiting nut, relate to water pipe rubber joint field, by setting with reliable anti-backflow function, the impact of medium backflow to pipeline equipment can be effectively blocked, simultaneously by sealing structure, the sealing performance of connecting part is improved, avoid medium leakage, guarantee the stable operation of pipeline conveying system.

Description

Technical Field

[0001] This utility model relates to the field of water pipe rubber joint technology, specifically a backflow prevention rubber joint. Background Technology

[0002] In pipeline transportation systems, rubber joints, as key components connecting pipelines, are mainly used to absorb pipeline vibration, compensate for pipeline displacement, and ensure the stable operation of the pipeline system. Existing rubber joints generally lack anti-backflow functionality. When backflow occurs in the pipeline, it can easily lead to equipment damage and reduced transportation efficiency. At the same time, some rubber joints have insufficient sealing performance, making them prone to media leakage after long-term use. Furthermore, their structural strength is inadequate, making them unsuitable for high-pressure, high-frequency vibration conditions. Utility Model Content

[0003] The purpose of this utility model is to provide a rubber joint that prevents backflow, so as to solve the problem mentioned in the background art that the existing rubber joints generally lack the function of preventing backflow. When the medium in the pipeline flows back, it is easy to cause equipment damage and reduce the conveying efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A backflow-preventing rubber joint, comprising: The rubber joint body has flanges fixedly installed on both ends of its outer wall, and the flanges are used to cooperate with and fix the connection with the pipeline. An anti-backflow assembly includes a channel tube, an input hole at the input end of the channel tube, an expansion hole at the output end of the input hole, a sliding hole at the output end of the expansion hole, a flow guide sleeve slidably connected to the inner walls of the expansion hole and the sliding hole, a second limiting nut threadedly connected to the output end of the channel tube, and a spring provided between the inner wall of the flow guide sleeve and the second limiting nut.

[0005] In a preferred embodiment of this utility model, the outer wall of the flange has a sealing groove, and a sealing ring is embedded and fixedly installed in the inner wall of the sealing groove. The thickness of the sealing ring is greater than the depth of the sealing groove, and a screw hole is provided in the inner wall of the flange.

[0006] In a preferred embodiment of this utility model, the channel tube is fixedly installed inside the rubber joint body, and the inner wall of the input end of the rubber joint body is threadedly connected to a first limiting nut, and a through hole is provided in the middle of the first limiting nut.

[0007] In a preferred embodiment of this utility model, the through hole is connected to the input hole, the expansion hole is set as an annular shape, and the diameter of the expansion hole is larger than the diameter of the input hole.

[0008] In a preferred embodiment of this utility model, the diameter of the sliding hole is smaller than the diameter of the expansion hole, and the end of the guide sleeve and the output end of the input hole are squeezed and sealed under the action of the spring.

[0009] In a preferred embodiment of this utility model, the inside of the flow guide sleeve is a hollow structure, and flow guide holes are provided on the outer walls of both sides of the head end of the flow guide sleeve. Two sets of flow guide holes are symmetrically arranged, and an output hole is provided in the middle of the second limiting nut.

[0010] In a preferred embodiment of this utility model, the second limiting nut is connected to the hollow part of the guide sleeve, and a hexagonal wrench groove is provided at the tail of the second limiting nut, which is connected to the output hole.

[0011] In a preferred embodiment of this utility model, the outer wall of the rubber joint body is uniformly provided with a plurality of annular reinforcing ribs, the annular reinforcing ribs and the rubber joint body are integrally formed, and the thickness of the annular reinforcing ribs is 1.2-1.5 times the thickness of the side wall of the rubber joint body.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0013] 1. By setting up a reliable anti-backflow function, the impact of medium backflow on pipeline equipment can be effectively blocked. At the same time, the sealing structure improves the sealing performance of the connection parts, avoids medium leakage, and ensures the stable operation of the pipeline transportation system. 2. The main body has excellent structural strength, can adapt to various working conditions, and the installation and commissioning of each component is convenient, which can reduce the installation and maintenance costs of the pipeline system and extend the service life of the overall equipment. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the main structure of a rubber joint designed to prevent backflow. Figure 2 This is a schematic diagram of the rear view structure of a rubber joint designed to prevent backflow. Figure 3 This is a cross-sectional view of a rubber joint designed to prevent backflow. Figure 4 This is a schematic diagram of the exploded structure of a rubber joint designed to prevent backflow.

[0015] In the figure: rubber joint body 100, flange 110, screw hole 111, sealing groove 120, sealing ring 130, channel pipe 200, expansion hole 210, sliding hole 211, input hole 220, first limit nut 230, through hole 231, guide sleeve 240, guide hole 241, spring 242, second limit nut 250, output hole 251, hexagonal wrench groove 252. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] Example 1: As Figures 1-4 ,include: The rubber joint body 100 has flanges 110 fixedly installed on the outer walls of both ends of the rubber joint body 100. The flanges 110 are used to fix and connect with the pipeline. The anti-backflow assembly includes a channel tube 200, an input hole 220 at the input end of the channel tube 200, an expansion hole 210 at the output end of the input hole 220, a sliding hole 211 at the output end of the expansion hole 210, a guide sleeve 240 slidably connected to the inner walls of the expansion hole 210 and the sliding hole 211, a second limiting nut 250 threadedly connected to the output end of the channel tube 200, and a spring 242 provided between the inner wall of the guide sleeve 240 and the second limiting nut 250.

[0018] The specific application scenario of this embodiment is as follows: When the medium is being transported normally, the medium pressure acts on the guide sleeve 240, overcoming the elastic force of the spring 242 and pushing the guide sleeve 240 to slide along the sliding hole 211 toward the second limiting nut 250, so that the input hole 220 is connected to the inside of the guide sleeve 240, and the medium is transported sequentially through the input hole 220, the inside of the guide sleeve 240, and the output hole 251; when the medium flows back, the pressure of the backflowing medium acts on the end of the guide sleeve 240 facing the input hole 220, and at the same time, the spring 242 restores its elastic deformation and pushes the guide sleeve 240 to slide in the opposite direction, so that the end of the guide sleeve 240 is tightly fitted with the output end of the input hole 220, thereby sealing and blocking the input hole 220 and preventing the medium from continuing to flow back.

[0019] Example 2: Figure 1 and Figure 2 The outer wall of the flange 110 has a sealing groove 120, and a sealing ring 130 is embedded and fixedly installed in the inner wall of the sealing groove 120. The thickness of the sealing ring 130 is greater than the depth of the sealing groove 120. The inner wall of the flange 110 has a screw hole 111.

[0020] The specific application scenario of this embodiment is as follows: the rubber joint and the pipeline are fixedly connected by bolts passing through the bolt holes 111 of the flange 110. During the connection process, the pipeline flange and the flange 110 of the rubber joint are squeezed against each other, causing the sealing ring 130 in the sealing groove 120 to be compressed and deformed. Since the thickness of the sealing ring 130 is higher than the depth of the sealing groove 120, the compressed sealing ring 130 can completely fill the gap between the pipeline flange and the flange 110, forming a reliable sealing structure and blocking the channel for leakage of the medium from the connection gap.

[0021] Example 3: Figure 1 and Figure 2 The channel tube 200 is fixedly installed inside the rubber joint body 100. The inner wall of the input end of the rubber joint body 100 is threadedly connected to the first limiting nut 230. The first limiting nut 230 has a through hole 231 in the middle, which communicates with the input hole 220. The expansion hole 210 is set as an annular shape, and the diameter of the expansion hole 210 is larger than the diameter of the input hole 220. The diameter of the sliding hole 211 is smaller than the diameter of the expansion hole 210. The end of the guide sleeve 240 is connected to the input hole 220. The output end is sealed by compression under the action of spring 242. The inside of the guide sleeve 240 is a hollow structure. The outer walls on both sides of the head end of the guide sleeve 240 are provided with guide holes 241. Two sets of guide holes 241 are symmetrically arranged. The middle part of the second limit nut 250 is provided with an output hole 251. The second limit nut 250 is connected to the hollow part of the guide sleeve 240. The tail of the second limit nut 250 is provided with a hexagonal wrench groove 252, which is connected to the output hole 251.

[0022] The specific application scenario of this embodiment is as follows: The first limiting nut 230 is fixed to the input end of the rubber joint body 100 by threads, which plays a limiting and fixing role on the channel tube 200, ensuring the stability of the installation position of the channel tube 200; when the medium is being transported normally, it enters the input hole 220 through the through hole 231 of the first limiting nut 230, and pushes the guide sleeve 240 to slide. Part of the medium is transported through the inside of the guide sleeve 240, and the other part can flow into the expansion hole 210 through the guide hole 241 at the head end of the guide sleeve 240, and then flow back into the inside of the guide sleeve 240, improving the medium transport efficiency; when backflow occurs, the guide sleeve 240 seals the input hole 220 under the action of the spring 242, and at the same time, the expansion hole 210 can buffer the backflow medium, reducing the impact of backflow pressure on the sealing structure; the installation depth of the second limiting nut 250 can be easily adjusted through the hexagonal wrench groove 252, thereby adjusting the preload of the spring 242 to adapt to the anti-backflow requirements of different medium pressure conditions.

[0023] Example 4: Figure 1 and Figure 2The outer wall of the rubber joint body 100 is uniformly provided with several annular reinforcing ribs. The annular reinforcing ribs and the rubber joint body 100 are integrally formed. The thickness of the annular reinforcing ribs is 1.2-1.5 times the thickness of the side wall of the rubber joint body 100.

[0024] The specific application scenario of this embodiment is as follows: the annular reinforcing rib is integrally formed with the rubber joint body 100, which can enhance the overall structural rigidity of the rubber joint body 100 and reduce the deformation of the body under the action of high pressure medium; at the same time, the uniformly distributed annular reinforcing rib can disperse the stress transmitted to the rubber joint body 100 by pipeline vibration, and avoid local stress concentration leading to damage to the body; in addition, the annular reinforcing rib can also improve the anti-aging and anti-wear capabilities of the rubber joint body 100, and extend its service life under harsh working conditions.

[0025] The working principle of this utility model is as follows: When used by those skilled in the art, the flange 110 is fixedly connected to the pipeline, and the sealing ring 130 in the sealing groove 120 achieves reliable sealing of the connection. The annular reinforcing ribs on the outer wall of the rubber joint body 100 enhance the structural strength of the body and adapt to different working conditions. When the medium is transported, it enters the input hole 220 of the channel pipe 200 through the through hole 231 of the first limiting nut 230, pushing the guide sleeve 240 to slide against the force of the spring 242. The medium is transported through the inside of the guide sleeve 240 and the guide hole 241. When the medium flows back, the backflow pressure and the elastic force of the spring 242 work together to seal the input hole 220 of the guide sleeve 240 and prevent backflow. The second limiting nut 250 can be adjusted through the hexagonal wrench groove 252, thereby adjusting the preload of the spring 242 to adapt to different medium pressure scenarios. All components work together to achieve the comprehensive functions of pipeline connection, sealing, backflow prevention and structural reinforcement, ensuring the stable operation of the pipeline system.

[0026] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A backflow-preventing rubber joint, characterized in that, include: A rubber joint body (100) has flange plates (110) fixedly installed on the outer walls of both ends of the rubber joint body (100), and the flange plates (110) are used to cooperate with the pipeline for fixed connection. The anti-backflow assembly includes a channel tube (200), the input end of which is provided with an input hole (220), the output end of which is provided with an expansion hole (210), the output end of which is provided with a sliding hole (211), the inner walls of which are slidably connected to a guide sleeve (240), the output end of which is threadedly connected to a second limiting nut (250), and a spring (242) is provided between the inner wall of the guide sleeve (240) and the second limiting nut (250).

2. The anti-backflow rubber joint according to claim 1, characterized in that, The outer wall of the flange (110) has a sealing groove (120), and a sealing ring (130) is embedded and fixedly installed on the inner wall of the sealing groove (120). The thickness of the sealing ring (130) is greater than the depth of the sealing groove (120), and a screw hole (111) is provided on the inner wall of the flange (110).

3. The anti-backflow rubber joint according to claim 1, characterized in that, The channel tube (200) is fixedly installed inside the rubber joint body (100). The inner wall of the input end of the rubber joint body (100) is threaded with a first limiting nut (230). A through hole (231) is opened in the middle of the first limiting nut (230).

4. The anti-backflow rubber joint according to claim 3, characterized in that, The through hole (231) is connected to the input hole (220), and the expansion hole (210) is set as an annular shape, with the diameter of the expansion hole (210) being larger than the diameter of the input hole (220).

5. The anti-backflow rubber joint according to claim 4, characterized in that, The diameter of the sliding hole (211) is smaller than the diameter of the expansion hole (210), and the end of the guide sleeve (240) and the output end of the input hole (220) are squeezed and sealed under the action of the spring (242).

6. The anti-backflow rubber joint according to claim 5, characterized in that, The guide sleeve (240) has a hollow structure inside. The guide sleeve (240) has guide holes (241) on both sides of the outer wall at the head end. Two sets of guide holes (241) are symmetrically arranged. The second limiting nut (250) has an output hole (251) in the middle.

7. A backflow-prevention rubber joint according to claim 6, characterized in that, The second limiting nut (250) is connected to the hollow part of the guide sleeve (240), and a hexagonal wrench groove (252) is provided at the tail of the second limiting nut (250), which is connected to the output hole (251).

8. The anti-backflow rubber joint according to claim 1, characterized in that, The outer wall of the rubber joint body (100) is uniformly provided with several annular reinforcing ribs. The annular reinforcing ribs and the rubber joint body (100) are integrally formed. The thickness of the annular reinforcing ribs is 1.2-1.5 times the thickness of the side wall of the rubber joint body (100).

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