Water utility expansion joint with check valve

Abstract

This invention discloses a water utilization expansion joint with a one-way check valve, relating to the field of pipeline compensation technology. The water utilization expansion joint includes an inlet connecting ring and an outlet connecting ring. When used in deep burial applications, the water utilization expansion joint of this invention, through the cooperation of protective components, shielding components, one-way flow guiding components, and treatment components, can guide accumulated groundwater into the interior of the expansion joint, preventing the accumulation of large amounts of groundwater on the outside of the bellows from affecting its use and facilitating the normal operation of the expansion joint. Furthermore, during the flow guiding process, the installation and protective components reduce resistance to the water flow, ensuring smoother one-way flow drainage, and preventing backflow of high-pressure water from directly impacting the interior of the one-way check valve and damaging its internal valve core components, thus ensuring stable operation of the one-way check valve.

Description

Technical Field

[0001] This invention relates to the field of pipeline compensation technology, specifically a water expansion joint with a one-way check valve. Background Technology

[0002] Water expansion joints are a type of flexible compensation device in water conservancy pipeline systems. Their core function is to counteract the deformation of pipelines caused by temperature changes, pressure fluctuations, and foundation settlement, thereby ensuring the safe operation of the pipeline.

[0003] When water-utilizing expansion joints are used as an auxiliary in directly buried water pipes, the pipes and expansion joints are deeply buried and subject to the action of groundwater, which will generate external pressure on the expansion pipe and affect the normal expansion and contraction of the expansion joint. To address this, we propose a water-utilizing expansion joint with a one-way check valve. Summary of the Invention

[0004] The purpose of this invention is to provide a water utilization expansion joint with a one-way check valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a water utilization expansion joint with a one-way check valve, comprising an inlet connecting ring and an outlet connecting ring, wherein a retractable bellows is fixed between the inlet connecting ring and the outlet connecting ring, an adjusting component for assisting in the expansion and contraction limit is provided between the inlet connecting ring and the outlet connecting ring, and flanges for assisting in the connection with pipeline installation are fixed on the inlet connecting ring and the outlet connecting ring, and further comprising:

[0006] A shielding component is installed between the inlet connecting ring and the outlet connecting ring to shield and protect the bellows.

[0007] A unidirectional flow guide component is installed on the water outlet connection ring for unidirectional flow guide of groundwater when the expansion joint is in use. The shielding component is provided with a treatment component for filtering the water during the flow guide process.

[0008] In addition, an installation component disposed on the unidirectional flow guide component for assisting in the installation of the unidirectional flow guide component, wherein the installation component is provided with a protective component for protecting the unidirectional flow guide component.

[0009] Preferably, the shielding assembly includes a first mounting ring fixed to the outside of the inlet connecting ring, a second mounting ring fixed to the outside of the outlet connecting ring, and a protective cover for shielding and protecting the corrugated pipe between the first mounting ring and the second mounting ring. The protective cover is sleeved on the outside of the corrugated pipe, and one end of the protective cover is fixed to the second mounting ring.

[0010] Preferably, the one-way flow guide assembly includes a threaded hole on the outlet connecting ring, and a one-way check valve is detachably installed on the threaded hole by means of threads. The conduction direction of the one-way check valve is from the inside of the protective cover to the inside of the outlet connecting ring. The one-way check valve includes a valve stem seat and an outlet pipe for guiding the water outflow. The valve stem seat and the threaded hole are connected by threads. The outlet pipe and the valve stem seat are arranged perpendicular to each other, and the outlet pipe on the one-way check valve is aligned with the water flow direction inside the outlet connecting ring under the action of the mounting assembly.

[0011] Preferably, the installation assembly includes an annular seat fitted onto the outside of the outlet pipe, a positioning component for assisting the annular seat in positioning is provided between the annular seat and the valve stem seat, a limiting component for limiting positioning is provided between the annular seat and the outlet pipe, a pin is provided on the outside of the annular seat, a first telescopic component for assisting telescopic connection is provided between the pin and the annular seat, and a limiting hole for inserting one end of the pin into the limiting position is provided on the inner side of the outlet connecting ring, the limiting hole and the threaded hole are arranged parallel to each other in the axial direction of the outlet connecting ring.

[0012] Preferably, the first telescopic assembly includes a mounting cylinder fixed to the outside of the annular seat, one end of the pin is located inside the mounting cylinder and slidably connected to the mounting cylinder, and a first spring for mounting the pin is installed inside the mounting cylinder.

[0013] Preferably, the protective component includes a baffle plate disposed on the front side of the outlet pipe to protect the outlet pipe from backflow when it occurs inside the outlet connection ring. A conical cylinder for auxiliary transmission is fixed on the baffle plate, and a second telescopic component for auxiliary telescopic connection is disposed between the baffle plate and the annular seat.

[0014] Preferably, the second telescopic component includes two sets of T-shaped rods slidably connected to the annular seat, and the two sets of T-shaped rods are arranged symmetrically. One end of each T-shaped rod is fixed to the baffle plate, and a second spring is sleeved on the outer side of each T-shaped rod.

[0015] Preferably, the positioning assembly includes side plates symmetrically fixed to both sides of the annular seat, and two sets of positioning rods symmetrically fixed to the side plates for positioning against the outer side of the valve stem seat.

[0016] Preferably, the limiting component includes multiple sets of T-shaped screw holes formed on the annular seat, and the multiple sets of T-shaped screw holes are arranged in a circular array on the annular seat. T-shaped bolts are threaded onto the T-shaped screw holes, and one end of each set of T-shaped bolts abuts against the outer side of the water outlet pipe.

[0017] Preferably, the processing component includes a first fixing ring and a second fixing ring disposed between the first mounting ring and the second mounting ring. The first fixing ring and the second fixing ring are located inside the protective cover. The first fixing ring is fixed to the first mounting ring, and the second fixing ring is abutted against the inner wall of the protective cover. Multiple sets of baffles for filtering water entering the protective cover are fixed in a ring array between the first fixing ring and the second fixing ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] When the water-utilizing expansion joint of the present invention is used in deep burial, the cooperation of the protective component, the shielding component, the one-way flow guiding component, and the treatment component can guide the accumulated groundwater into the interior of the water-utilizing expansion joint, avoiding the impact of a large amount of groundwater accumulating on the outside of the bellows on the use of the bellows, and facilitating the normal use of the expansion joint. In addition, during the flow guiding and transportation process, the installation and protective components can reduce the resistance to the transported water flow, ensuring smoother one-way flow drainage, and also prevent the backflow of high-pressure water from directly impacting the interior of the one-way check valve and causing damage to the internal valve core components, thus facilitating the stable use of the one-way check valve. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the expansion joint of the present invention;

[0022] Figure 3 This is a schematic diagram of the unidirectional flow guide component structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the unidirectional flow guide component and the direction of water flow according to the present invention;

[0024] Figure 5 This is a schematic diagram of the processing component structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the unidirectional flow guide component of the present invention after installation;

[0026] Figure 7 This is a schematic diagram of the installation and positioning components of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the first telescopic component, the protective component, and the second telescopic component of the present invention;

[0028] Figure 9 This is a schematic diagram of the positioning component of the present invention during positioning.

[0029] Figure 10 This is a schematic diagram of the limiting component structure of the present invention;

[0030] Figure 11 This is a schematic diagram showing the direction of water flow and the outlet pipe after the installation of the unidirectional flow guide component of the present invention.

[0031] Figure 12 This is a schematic diagram of the protective component of the present invention in its protective use state;

[0032] Figure 13 This is a schematic diagram of the installation and screwing in of the one-way check valve of the present invention;

[0033] Figure 14 This is a schematic diagram illustrating the flow obstruction that occurs when the one-way check valve of the present invention is installed abnormally.

[0034] In the diagram: 101-Inlet connecting ring; 102-Outlet connecting ring; 103-Bellwall; 104-Adjusting component; 105-Flange; 201-First mounting ring; 202-Second mounting ring; 203-Protective cover; 301-First fixing ring; 302-Second fixing ring; 303-Stop lever; 401-Threaded hole; 402-One-way check valve; 4021-Valve stem seat; 4022-Outlet pipe; 501-Annular seat; 502-Pin; 503-Limiting hole; 601-Mounting cylinder; 602-First spring; 701-Side plate; 702-Positioning rod; 801-T-bolt hole; 802-T-bolt; 901-Baffle plate; 902-Conical cylinder; 1001-T-rod; 1002-Second spring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1-14 The water utilization expansion joint with a one-way check valve shown in the figure includes an inlet connecting ring 101 and an outlet connecting ring 102. A retractable bellows 103 is fixed between the inlet connecting ring 101 and the outlet connecting ring 102. An adjustment component 104 for assisting in the expansion and contraction limit is provided between the inlet connecting ring 101 and the outlet connecting ring 102. A flange 105 for assisting in the connection with the pipeline is fixed on the inlet connecting ring 101 and the outlet connecting ring 102.

[0037] It should be noted here that: the water pipe is installed and connected through the flange 105 on the inlet connecting ring 101 and the outlet connecting ring 102. After installation and connection, the pipe and water utilization expansion joint are buried directly underground according to the usage requirements, so that the water utilization expansion joint and the pipe are in a deep buried state. When the water is transported, the water enters the interior of the water utilization expansion joint through the connection and transport function of the pipe through the inlet connecting ring 101 and is discharged outward through the outlet connecting ring 102. When transported and used, the flexible connection function of the corrugated pipe 103 on the water utilization expansion joint is used to offset the deformation of the pipe caused by temperature changes, pressure fluctuations and foundation settlement, so as to ensure the safe operation of the pipe.

[0038] In addition, the adjusting component 104 is used to control the extension and retraction stroke of the expansion joint. In this application, the extension and retraction principle of the expansion joint and the operating principle of the adjusting component 104 are conventional technical means and will not be described in detail here.

[0039] Also includes:

[0040] A shielding component is disposed between the inlet connecting ring 101 and the outlet connecting ring 102 to shield and protect the bellows 103.

[0041] A one-way flow guide component is installed on the water outlet connection ring 102 for one-way flow guide of groundwater when the expansion joint is in use. The shielding component is equipped with a treatment component for filtering the water during the flow guide process.

[0042] In addition, an installation component for assisting the installation of the unidirectional flow guide component is provided on the unidirectional flow guide component, and a protective component for protecting the unidirectional flow guide component is provided on the installation component.

[0043] It should be noted that when the water-utilizing expansion joint is used in deep burial, the cooperation of the protective components, shielding components, unidirectional flow guiding components, and treatment components can guide the accumulated groundwater into the interior of the water-utilizing expansion joint, preventing the accumulation of a large amount of groundwater on the outside of the bellows 103 from affecting the use of the bellows 103, thus facilitating the normal use of the expansion joint. In addition, during the flow guiding and transportation process, the installation and protective components can reduce the resistance to the transported water flow, ensuring smoother unidirectional flow drainage, and also prevent the backflow of high-pressure water from directly impacting the interior of the one-way check valve 402 and causing damage to the internal valve core components, thus facilitating the stable use of the one-way check valve 402.

[0044] Preferably, the shielding assembly includes a first mounting ring 201 fixed to the outside of the inlet connecting ring 101, a second mounting ring 202 fixed to the outside of the outlet connecting ring 102, and a protective cover 203 for shielding and protecting the bellows 103 is provided between the first mounting ring 201 and the second mounting ring 202. The protective cover 203 is sleeved on the outside of the bellows 103, and one end of the protective cover 203 is fixed to the second mounting ring 202.

[0045] It should be noted that when the water-utilizing expansion joint is used in deep burial, the corrugated pipe 103 is shielded and protected by the protective cover 203 between the first mounting ring 201 and the second mounting ring 202, so as to prevent the corrugated pipe 103 on the water-utilizing expansion joint from being directly exposed to the external soil and being squeezed and damaged.

[0046] Preferably, the one-way flow guide assembly includes a threaded hole 401 opened on the outlet connecting ring 102. A one-way check valve 402 is detachably installed on the threaded hole 401 by means of threads. The conduction direction of the one-way check valve 402 is from the inside of the protective cover 203 to the inside of the outlet connecting ring 102. The one-way check valve 402 includes a valve stem seat 4021 and an outlet pipe 4022 for guiding the water out. The valve stem seat 4021 is connected to the threaded hole 401 by threads. The outlet pipe 4022 is arranged perpendicular to the valve stem seat 4021. Under the action of the mounting assembly, the outlet pipe 4022 on the one-way check valve 402 is consistent with the water flow direction inside the outlet connecting ring 102.

[0047] It should be noted here that as groundwater enters between the protective cover 203 and the bellows 103, when the pressure of the accumulated water exceeds the set opening pressure of the one-way check valve 402, the one-way check valve 402 opens, and the groundwater accumulated between the protective cover 203 and the bellows 103 is guided to the interior of the water utilization expansion joint through the one-way check valve 402. This prevents a large amount of groundwater from accumulating on the outside of the bellows 103 from affecting the use of the bellows 103, and facilitates the normal use of the expansion joint.

[0048] Furthermore, the one-way flow principle of the one-way check valve 402 and the setting of the opening pressure on the one-way check valve 402 are conventional technical means in this application and will not be elaborated on here.

[0049] Preferably, the installation assembly includes an annular seat 501 sleeved on the outside of the outlet pipe 4022, a positioning component for assisting the positioning of the annular seat 501 between the annular seat 501 and the valve stem seat 4021, a limiting component for limiting the positioning after positioning between the annular seat 501 and the outlet pipe 4022, a pin 502 on the outside of the annular seat 501, a first telescopic component for assisting telescopic connection between the pin 502 and the annular seat 501, and a limiting hole 503 for inserting one end of the pin 502 into the limiting hole on the inner side of the outlet connecting ring 102, the limiting hole 503 and the threaded hole 401 being arranged parallel to each other in the axial direction of the outlet connecting ring 102;

[0050] It should be noted here that: when installing the one-way check valve 402 onto the outlet connecting ring 102, during the installation process, one end of the valve stem seat 4021 is screwed into the threaded hole 401. During this screwing process, as the valve stem seat 4021 rotates, it causes the pin 502 of the annular seat 501 on the outlet pipe 4022 to rotate around the valve stem seat 4021 and move towards the inner wall of the outlet connecting ring 102. During this movement, the front end of the pin 502 abuts against the inner wall of the outlet connecting ring 102, pushing the pin 502 towards the outlet connecting ring 102. The internal contraction movement of the cylinder 601 causes the first spring 602 to deform under force and generate elastic force. As the valve stem seat 4021 continues to rotate and screw in, when the front end of the pin 502 is in front of the limiting hole 503, the elastic force of the first spring 602 pushes the front end of the pin 502 into the interior of the limiting hole 503. Through the insertion and limiting effect of the pin 502 and the limiting hole 503, the one-way check valve 402 is positioned during the screwing-in installation process. Through the positioning effect, the water outlet pipe 4022 on the one-way check valve 402 is parallel to the direction of water flow inside the water expansion joint.

[0051] Preferably, the first telescopic component includes a mounting cylinder 601 fixed to the outside of the annular seat 501, one end of the pin 502 is located inside the mounting cylinder 601 and slidably connected to the mounting cylinder 601, and a first spring 602 for mounting and connecting the pin 502 is installed inside the mounting cylinder 601.

[0052] It should be noted here that the mounting cylinder 601 and the first spring 602 facilitate the telescopic connection of the pin 502 and its reset after telescopic movement.

[0053] Preferably, the protective component includes a baffle plate 901 located on the front side of the outlet pipe 4022 to protect the outlet pipe 4022 from backflow inside the outlet connection ring 102. A conical cylinder 902 for auxiliary transmission is fixed on the baffle plate 901. A second telescopic component for auxiliary telescopic connection is provided between the baffle plate 901 and the annular seat 501.

[0054] It should be noted that: In addition, when the pipeline and expansion joint are in use, the water hammer phenomenon will occur inside the pipeline due to the start and stop of the water supply. This causes the supplied water to be pressurized and flow back. During the backflow process, the interaction between the backflowing water and the conical cylinder 902 pushes the baffle plate 901 toward the outlet pipe 4022 and blocks it. Through the blocking effect of the baffle plate 901 and the outlet pipe 4022, the high-pressure backflowing water is prevented from directly impacting the inside of the one-way check valve 402 and causing damage to the internal valve core components, thus facilitating the stable use of the one-way check valve 402.

[0055] Preferably, the second telescopic component includes two sets of T-shaped rods 1001 slidably connected to the annular seat 501, and the two sets of T-shaped rods 1001 are arranged symmetrically. One end of the T-shaped rod 1001 is fixed to the baffle plate 901, and a second spring 1002 is sleeved on the outside of the T-shaped rod 1001.

[0056] It should be noted that the two sets of T-shaped rods 1001 facilitate the telescopic connection of the baffle plate 901, and the second spring 1002 facilitates the reset of the baffle plate 901 after movement.

[0057] Preferably, the positioning component includes side plates 701 symmetrically fixed on both sides of the annular seat 501, and two sets of positioning rods 702 symmetrically fixed on the side plates 701 for positioning against the outer side of the valve stem seat 4021; the limiting component includes multiple sets of T-shaped screw holes 801 opened on the annular seat 501, and the multiple sets of T-shaped screw holes 801 are arranged in a ring array on the annular seat 501, and T-shaped bolts 802 are threaded on the T-shaped screw holes 801, and one end of each set of T-shaped bolts 802 abuts against the outer side of the water outlet pipe 4022;

[0058] It should be noted here that: when the annular seat 501 is fitted onto the outlet pipe 4022 of the one-way check valve 402, during the fitting process, the ends of the two sets of positioning rods 702 on the two sets of side plates 701 abut against the outer side of the valve stem seat 4021 on the one-way check valve 402. Through the abutting and pressing action of the four sets of symmetrically arranged positioning rods 702, the fitted annular seat 501 is positioned, so that the pin 502 on the outer side of the annular seat 501 is parallel to the valve stem seat 4021. After the annular seat 501 is positioned, each set of T-bolts 802 is screwed into each set of T-bolt holes 801 and abuts against the outer wall of the outlet pipe 4022. Through the abutting and pressing action, the positioned and installed annular seat 501 is limited.

[0059] Preferably, the processing component includes a first fixing ring 301 and a second fixing ring 302 disposed between the first mounting ring 201 and the second mounting ring 202. The first fixing ring 301 and the second fixing ring 302 are located inside the protective cover 203. The first fixing ring 301 is fixed to the first mounting ring 201, and the second fixing ring 302 is disposed against the inner wall of the protective cover 203. Multiple sets of baffles 303 for filtering water entering the protective cover 203 are fixed in a ring array between the first fixing ring 301 and the second fixing ring 302.

[0060] It should be noted that when the protective cover 203 is in use, the water inside the soil will enter the protective cover 203 and the outer side of the corrugated pipe 103 through the gap between the protective cover 203 and the first mounting ring 201. During the water transportation process, the multiple sets of baffles 303 between the first fixing ring 301 and the second fixing ring 302 isolate and filter the particulate foreign matter in the water, so as to avoid a large number of particulate foreign matter entering and affecting the corrugated pipe 103 and the subsequent normal unidirectional flow.

[0061] In this solution: a water utilization expansion joint with a one-way check valve includes the following steps:

[0062] Before using the water expansion joint, an annular seat 501 is pre-installed on the one-way check valve 402. During the installation of the annular seat 501, it is fitted onto the outlet pipe 4022 of the one-way check valve 402. During this fitting process, the ends of the two sets of positioning rods 702 on the two sets of side plates 701 abut against the outer side of the valve stem seat 4021 on the one-way check valve 402. Through the abutting and pressing action of the four sets of symmetrically arranged positioning rods 702, the fitted annular seat 501 is positioned (see...). Figure 7 and Figure 8 The pin 502 on the outside of the annular seat 501 is parallel to the valve stem seat 4021. After the annular seat 501 is positioned, each set of T-bolts 802 is screwed into each set of T-bolt holes 801 and abuts against the outer wall of the outlet pipe 4022. Through the abutting and squeezing action, the annular seat 501 is limited after positioning and installation. During the positioning and fixing of the annular seat 501, the baffle plate 901 is at the front end of the outlet pipe 4022 and there is a gap to facilitate subsequent one-way drainage. After the annular seat 501 is positioned and fixed, the one-way check valve 402 is installed on the outlet connecting ring 102. During the installation of the one-way check valve 402, one end of the valve stem seat 4021 is screwed into the threaded hole 401 by means of threads (see...). Figure 13(The direction of screwing in), during the screwing process, as the valve stem seat 4021 rotates, it drives the pin 502 of the annular seat 501 on the outlet pipe 4022 to rotate around the valve stem seat 4021 and move towards the inner wall of the outlet connecting ring 102. During the movement, the front end of the pin 502 abuts against the inner wall of the outlet connecting ring 102, pushing the pin 502 to contract towards the interior of the mounting cylinder 601 and causing the first spring 602 to deform and generate elastic force. As the valve stem seat 4021 continues to rotate and screw in, when the front end of the pin 502 is in front of the limiting hole 503, the elastic force of the first spring 602 pushes the front end of the pin 502 into the interior of the limiting hole 503 (see...). Figure 6 (In the state), the one-way check valve 402 is positioned during the screwing-in installation process by the insertion and limiting action of the pin 502 and the limiting hole 503. Through the positioning action, the water outlet pipe 4022 on the one-way check valve 402 is parallel to the direction of water flow inside the expansion joint (see...). Figure 11 During the installation of the one-way check valve 402, both ends of the one-way check valve 402 are connected to the inside of the protective cover 203 and the inside of the outlet connection ring 102, respectively, with the direction of conduction being from the inside of the protective cover 203 to the inside of the outlet connection ring 102.

[0063] After the one-way check valve 402 and the annular seat 501 are installed, they are connected to the water pipeline through the flanges 105 on the inlet connecting ring 101 and the outlet connecting ring 102. After installation and connection, the pipeline and the water utilization expansion joint are buried directly underground according to the usage requirements, so that the water utilization expansion joint and the pipeline are in a deep buried state. When the water is transported, the water enters the interior of the water utilization expansion joint through the connection and transport function of the pipeline and is discharged outward through the outlet connecting ring 102. When transported and used, the flexible connection function of the corrugated pipe 103 on the water utilization expansion joint is used to offset the deformation of the pipeline caused by temperature changes, pressure fluctuations and foundation settlement, so as to ensure the safe operation of the pipeline.

[0064] When the water-utilizing expansion joint is used in deep burial, the corrugated pipe 103 is protected by the protective cover 203 between the first mounting ring 201 and the second mounting ring 202. This prevents the corrugated pipe 103 from directly contacting the external soil and being squeezed and damaged during deep burial. When protected by the protective cover 203, water present in the soil will enter through the gap between the protective cover 203 and the first mounting ring 201 to the outside of the protective cover 203 and the corrugated pipe 103. During water transport, the water is then transported through the first fixing ring 301 and... Multiple sets of baffles 303 between the second fixed rings 302 isolate and filter particulate foreign matter in the water, preventing a large amount of particulate foreign matter from entering and affecting the bellows 103 and subsequent normal unidirectional flow. As the groundwater enters between the protective cover 203 and the bellows 103, when the pressure of the accumulated water exceeds the set opening pressure of the one-way check valve 402, the one-way check valve 402 opens, guiding the groundwater accumulated between the protective cover 203 and the bellows 103 into the interior of the water utilization expansion joint (see...). Figure 4 The direction of water flow is determined to avoid the accumulation of a large amount of groundwater on the outside of the bellows 103, which could affect the use of the bellows 103 and facilitate the normal use of the expansion joint. In addition, during the process of water flow transportation inside the expansion joint and water flow transportation of accumulated groundwater, the positioning of the one-way check valve 402 during installation (the outlet pipe 4022 on the one-way check valve 402 is parallel to the direction of water flow inside the expansion joint) reduces the resistance of the one-way check valve 402 to the water flow and allows the one-way check valve 402 to more smoothly guide and discharge liquid in one direction.

[0065] Additionally, during the use of pipes and expansion joints, the start-stop operation of the water supply inside the pipes can cause water hammer, resulting in pressurized water that flows backward (see...). Figure 12 In the backflow process, the interaction between the backflowing water and the conical cylinder 902 pushes the baffle plate 901 toward the outlet pipe 4022 and abuts against it. Through the blocking effect of the baffle plate 901 and the outlet pipe 4022, the high-pressure backflowing water is prevented from directly impacting the interior of the one-way check valve 402 and causing damage to the internal valve core components, thus facilitating the stable use of the one-way check valve 402.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water utilization expansion joint with a one-way check valve, comprising: The inlet connecting ring (101) and the outlet connecting ring (102) are provided with a retractable corrugated pipe (103) fixed between the inlet connecting ring (101) and the outlet connecting ring (102), and an adjustment component (104) for assisting in the extension and retraction limit is provided between the inlet connecting ring (101) and the outlet connecting ring (102). A flange (105) for assisting in the connection with the pipeline is fixed on the inlet connecting ring (101) and the outlet connecting ring (102). Its characteristic is that it further includes: A shielding assembly is disposed between the inlet connecting ring (101) and the outlet connecting ring (102) to shield and protect the bellows (103); A one-way flow guide component is provided on the water outlet connection ring (102) for one-way flow of groundwater when the expansion joint is in use. The shielding component is provided with a treatment component for filtering the water during the flow guide process. And, an installation component disposed on the unidirectional flow guide component for assisting in the installation of the unidirectional flow guide component, wherein the installation component is provided with a protective component for protecting the unidirectional flow guide component; The one-way flow guide assembly includes a threaded hole (401) on the outlet connecting ring (102). A one-way check valve (402) is detachably installed on the threaded hole (401) by means of threads. The conduction direction of the one-way check valve (402) is from the inside of the protective cover (203) to the inside of the outlet connecting ring (102). The one-way check valve (402) includes a valve stem seat (4021) and an outlet pipe (4022) for guiding the water outflow. The valve stem seat (4021) is connected to the threaded hole (401) by means of threads. The outlet pipe (4022) and the valve stem seat (4021) are arranged perpendicular to each other. Under the action of the installation assembly, the outlet pipe (4022) on the one-way check valve (402) is consistent with the water flow direction inside the outlet connecting ring (102). The installation assembly includes an annular seat (501) sleeved on the outside of the outlet pipe (4022). A positioning component for assisting the annular seat (501) in being positioned is provided between the annular seat (501) and the valve stem seat (4021). A limiting component for limiting the position after positioning is provided between the annular seat (501) and the outlet pipe (4022). A pin (502) is provided on the outside of the annular seat (501). A first telescopic component for assisting telescopic connection is provided between the pin (502) and the annular seat (501). A limiting hole (503) for inserting one end of the pin (502) into the limiting position is provided on the inner side of the outlet connecting ring (102). The limiting hole (503) and the threaded hole (401) are arranged parallel to each other in the axial direction of the outlet connecting ring (102).

2. A water utilization expansion joint with a one-way check valve according to claim 1, characterized in that: The shielding assembly includes a first mounting ring (201) fixed to the outside of the inlet connecting ring (101), and a second mounting ring (202) fixed to the outside of the outlet connecting ring (102). A protective cover (203) for shielding and protecting the corrugated pipe (103) is provided between the first mounting ring (201) and the second mounting ring (202). The protective cover (203) is sleeved on the outside of the corrugated pipe (103), and one end of the protective cover (203) is fixed to the second mounting ring (202).

3. A water utilization expansion joint with a one-way check valve according to claim 2, characterized in that: The first telescopic assembly includes a mounting cylinder (601) fixed to the outside of the annular seat (501), one end of the pin (502) is located inside the mounting cylinder (601) and slidably connected to the mounting cylinder (601), and a first spring (602) for mounting and connecting the pin (502) is installed inside the mounting cylinder (601).

4. A water utilization expansion joint with a one-way check valve according to claim 3, characterized in that: The protective assembly includes a shielding plate (901) located on the front side of the outlet pipe (4022) to shield and protect the outlet pipe (4022) from backflow when it occurs inside the outlet connecting ring (102). A conical cylinder (902) for auxiliary transmission is fixed on the shielding plate (901). A second telescopic assembly for auxiliary telescopic connection is provided between the shielding plate (901) and the annular seat (501).

5. A water utilization expansion joint with a one-way check valve according to claim 4, characterized in that: The second telescopic assembly includes two sets of T-shaped rods (1001) slidably connected to the annular seat (501), and the two sets of T-shaped rods (1001) are arranged symmetrically. One end of the T-shaped rod (1001) is fixed to the baffle plate (901), and a second spring (1002) is sleeved on the outside of the T-shaped rod (1001).

6. A water utilization expansion joint with a one-way check valve according to claim 5, characterized in that: The positioning assembly includes side plates (701) symmetrically fixed on both sides of the annular seat (501), and two sets of positioning rods (702) symmetrically fixed on the side plates (701) for positioning against the outside of the valve stem seat (4021).

7. A water utilization expansion joint with a one-way check valve according to claim 6, characterized in that: The limiting component includes multiple sets of T-shaped screw holes (801) opened on the annular seat (501), and the multiple sets of T-shaped screw holes (801) are arranged in a ring array on the annular seat (501). T-shaped bolts (802) are threaded onto the T-shaped screw holes (801), and one end of each set of T-shaped bolts (802) abuts against the outer side of the water outlet pipe (4022).

8. A water utilization expansion joint with a one-way check valve according to claim 2, characterized in that: The processing component includes a first fixing ring (301) and a second fixing ring (302) disposed between a first mounting ring (201) and a second mounting ring (202). The first fixing ring (301) and the second fixing ring (302) are located inside the protective cover (203). The first fixing ring (301) is fixed on the first mounting ring (201), and the second fixing ring (302) abuts against the inner wall of the protective cover (203). The first fixing ring (301) and the second fixing ring (302) are arranged in a ring array to fix multiple sets of baffles (303) for filtering water entering the protective cover (203).

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