Water hammer resistant pipe fitting

Abstract

The utility model relates to the technical field of water hammer resistance of pipeline systems, in particular to a water hammer resistance pipe fitting which comprises a pipeline body, a first branch pipe, a second branch pipe, an energy absorption assembly and a piston assembly, and a closed energy absorption cavity is defined by the piston assembly, the energy absorption assembly and the first branch pipe. A buffering cavity is defined between the end, away from the energy absorption assembly, of the piston assembly and the second branch pipe, and the energy absorption cavity and the buffering cavity are coaxially arranged. The energy absorption assembly comprises an elastic piece, and when the piston assembly moves towards the energy absorption cavity, the elastic piece is stressed and deformed. According to the water hammer resistant pipe fitting, when a water hammer occurs, the elastic piece in the energy absorption cavity deforms to rapidly absorb impact force generated by the water hammer, the buffer cavity provides necessary displacement space for deformation recovery of the elastic piece, it is ensured that the elastic piece can recover deformation automatically after the water hammer is finished, the elastic piece is prevented from being in a compressed or stretched state for a long time, and the service life of the elastic piece is prolonged; the technical problem that an energy absorption component of an existing water hammer arrestor cannot automatically reset after the influence of a water hammer is finished is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipeline system anti water hammer, especially relates to a kind of anti water hammer pipe fittings. BACKGROUND

[0002] In the pipeline under pressure, due to external reasons (such as valve sudden closing, faucet closing, water pump unit sudden parking etc.) make the flow rate of water suddenly change, thereby causing water hammer, this water power phenomenon is called water hammer or water hammer. Pipe water hammer phenomenon has great harmfulness, the abnormal water hammer produced pipe pressure can be instantaneously amplified more than 10MPa in a working pressure of 1.0MPa pipeline system, this phenomenon is easy to cause pipe explosion, end electronic equipment (such as intelligent closestool) cause damage.

[0003] At present, mainly through installing water hammer eliminator on pipeline to solve pipe water hammer problem, but the water hammer eliminator in prior art still has insufficient, for example, when instantaneous closing valve, the energy-absorbing component (such as elastic member, including spring or elastic air bag etc.) in water hammer eliminator can be in force state for a long time, cannot reset after water hammer influence ends, need to wait to open valve next time to restore. For a long time, energy-absorbing component is easy to fail to cause pipeline system to be unable to cope with water hammer problem, bring big security risk to pipeline system. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of anti water hammer pipe fittings, when water hammer occurs, the elastic member in energy-absorbing cavity is deformed rapidly to absorb the impact force generated by water hammer, and the buffer cavity provides the necessary displacement space for the elastic member to restore deformation, which can ensure that the elastic member can restore deformation automatically after water hammer ends, avoid the elastic member being in compressed or stretched state for a long time, effectively prolong the service life of elastic member, solve the technical problem that the energy-absorbing component of water hammer eliminator in prior art cannot reset automatically after water hammer influence ends.

[0005] To achieve the above object, the utility model provides a kind of water hammer resistance pipe fittings, comprising: pipeline main body;With the inner cavity of the pipeline main body being communicated and being arranged first branch pipe and second branch pipe, the first branch pipe and the second branch pipe are connected to the pipe wall of the pipeline main body respectively, and the inner cavity of the first branch pipe and the inner cavity of the second branch pipe are coaxially arranged;Energy-absorbing component and piston assembly, the energy-absorbing component is connected to the end of the first branch pipe away from the pipeline main body, one end of the piston assembly is connected with the energy-absorbing component in the first branch pipe, the other end of the piston assembly passes through the pipeline main body and extends into the second branch pipe;The piston assembly, the energy-absorbing component and the first branch pipe are enclosed to form airtight energy-absorbing cavity, and the other end of the piston assembly away from the energy-absorbing component is enclosed with the second branch pipe to form buffer cavity, and the energy-absorbing cavity and the buffer cavity are coaxially arranged;The energy-absorbing component includes elastic member, the elastic member is connected with the piston assembly in the energy-absorbing cavity, and the piston assembly moves along the axial direction of the first branch pipe and the second branch pipe, and the elastic member deforms under stress when the piston assembly moves towards the direction of the energy-absorbing cavity.

[0006] Optionally, the piston assembly includes coaxially arranged first connecting rod, first push plate and second push plate, and the axis of the first connecting rod coincides with the axis of the energy-absorbing cavity and the buffer cavity;The first push plate and the second push plate are connected to the two ends of the axial direction of the first connecting rod respectively, the first push plate is located in the first branch pipe and is connected with the first branch pipe slidingly, the second push plate is located in the second branch pipe and is connected with the second branch pipe slidingly, and the first push plate and the inner tube wall of the first branch pipe are sealingly connected, and the second push plate and the inner tube wall of the second branch pipe are sealingly connected;The end surface of the first push plate away from the second push plate is connected with the elastic member.

[0007] Optionally, the energy-absorbing component further includes first shell, the first shell is a one-end-opened cylindrical structure, one end of the first shell opening is detachably connected to the end of the first branch pipe away from the pipeline main body, the first push plate is connected with the first shell slidingly in the first shell, and the first push plate and the inner peripheral wall of the first shell are sealingly connected, and the first push plate and the first shell enclose the airtight energy-absorbing cavity;The elastic member includes first spring located inside the first shell, one end of the first spring is fixedly connected with the end surface of the first push plate away from the second push plate, and the other end of the first spring extends to the inner top wall of the first shell fixedly connected along the axial direction of the first branch pipe.

[0008] Optionally, the energy absorption assembly further comprises an oil baffle, the oil baffle is detachably connected to the inside of the first shell, the oil baffle divides the energy absorption cavity into a damping oil cavity and an air cavity, the damping oil cavity and the air cavity are sequentially arranged along the axial direction of the first shell, and the damping oil cavity is arranged at the end away from the opening of the first shell; the piston assembly further comprises a second connecting rod and a damping oil plate, one end of the second connecting rod is connected with the first push plate, the other end of the second connecting rod is connected with the damping oil plate after penetrating through the oil baffle, the second connecting rod is in sliding connection with the oil baffle, and the damping oil plate is in sliding connection with the first shell in the damping oil cavity; a plurality of through holes are formed in the damping oil plate along the plate surface to allow the damping oil in the damping oil cavity to pass through; the first spring is arranged in the damping oil cavity, one end of the first spring is fixedly connected with the end face of the damping oil plate away from the first push plate, and the other end of the first spring extends to the inner top wall of the first shell in the axial direction of the first shell.

[0009] Optionally, the elastic member further comprises a second spring arranged in the damping oil cavity, one end of the second spring is fixedly connected with the end face of the oil baffle away from the first push plate, and the other end of the second spring extends to be fixedly connected with the damping oil plate in the axial direction of the first shell.

[0010] Optionally, the axis of the second connecting rod coincides with the axis of the first connecting rod, and the second spring is sleeved on the outer circumferential side of the second connecting rod, and the axes of the first spring and the second spring coincide.

[0011] Optionally, the anti-water hammer pipe fitting further comprises a buffer assembly, the buffer assembly comprises a second shell and an end cover, the second shell is a cylindrical structure with two open ends, the second shell is detachably connected to the end of the second branch pipe away from the pipe body, the inner cavity of the second shell and the inner cavity of the second branch pipe are in communication with each other, and the end cover is detachably connected to the end of the second shell away from the second branch pipe; the second push plate is in sliding connection with the second shell in the second shell, and the second push plate and the inner circumferential wall of the second shell are in sealed connection, and the buffer cavity is formed by the second push plate, the second shell and the end cover.

[0012] Optionally, one end of the first branch pipe is fixedly connected with the outer circumferential wall of the pipe body, and the other end of the first branch pipe is upwardly inclined and arranged towards the water outlet end of the pipe body; one end of the second branch pipe is fixedly connected with the outer circumferential wall of the pipe body, and the other end of the second branch pipe is downwardly inclined and arranged towards the water inlet end of the pipe body.

[0013] Optionally, the anti-water hammer pipe fitting further comprises a first insert fixedly connected to one end of the first branch pipe away from the pipe body, and an outer circumferential side of the first insert is fixedly connected to an inner circumferential side of the first branch pipe; the first shell is threadedly connected to the first insert, and an axial end surface of the first insert is provided with a first mounting through hole for mounting the first shell.

[0014] Optionally, the anti-water hammer pipe fitting further comprises a second insert fixedly connected to one end of the second branch pipe away from the pipe body, and an outer circumferential side of the second insert is fixedly connected to an inner circumferential side of the second branch pipe; the second shell is threadedly connected to the second insert, and an axial end surface of the second insert is provided with a second mounting through hole for mounting the second shell.

[0015] Compared with the prior art, the anti-water hammer pipe fitting has the following beneficial effects:

[0016] 1. The volume of the energy absorption cavity and the buffer cavity changes synchronously by the piston assembly, and the linkage between the energy absorption cavity and the buffer cavity can be realized: when facing water flow impact, the piston assembly moves under the impact of water flow, the elastic member in the energy absorption cavity deforms, the kinetic energy generated by water hammer is converted into elastic potential energy of the elastic member, and therefore the energy absorption cavity can quickly absorb the impact force generated by water hammer when water hammer occurs; and the buffer cavity provides necessary displacement space for the elastic member to restore deformation, so that the elastic member can restore deformation after water hammer ends, the elastic member is prevented from being in a compressed or stretched state for a long time, the service life of the elastic member is effectively prolonged, and the technical problem that the energy absorption part of the water hammer eliminator cannot reset after water hammer influence ends in the prior art is solved.

[0017] 2. The damping oil cavity and the damping oil plate are arranged, when water hammer occurs, the damping oil plate moves along the axial direction of the damping oil cavity, the damping oil in the damping oil cavity can pass through the through hole, and the damping oil generates heat when passing through the through hole, so that the kinetic energy generated by water hammer can be converted into heat energy of the damping oil, the pressure fluctuation peak value when water hammer occurs is further reduced, and the stable operation of the pipeline system is protected.

[0018] 3. The first spring is arranged in the damping oil cavity, the medium in the damping oil cavity is damping oil and a small amount of air, and the damping characteristics of the damping oil can make the movement of the damping oil plate when the damping oil plate moves and extrudes the first spring relatively stable, and the stability of the anti-water hammer pipe fitting during operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the anti-water hammer pipe fitting of an embodiment of the utility model;

[0020] Figure 2 It is a sectional view (front view) of the anti-water hammer pipe fitting of an embodiment of the utility model;

[0021] Figure 3 A perspective sectional view of the water hammer resisting pipe fitting of one embodiment of the present application;

[0022] Figure 4 A perspective sectional view of the water hammer resisting pipe fitting of one embodiment of the present application; Figure 3 An enlarged schematic view at E;

[0023] Figure 5 A structure schematic view of the damping oil plate of the water hammer resisting pipe fitting of one embodiment of the present application;

[0024] Figure 6 A front view of the water hammer resisting pipe fitting of one embodiment of the present application;

[0025] Figure 7 A structure schematic view of the first insert of the water hammer resisting pipe fitting of one embodiment of the present application.

[0026] Explanation of reference numerals: pipeline main body 1, water inlet 11, water outlet 12, branch port 13, first branch pipe 2, second branch pipe 3, energy absorbing assembly 4, elastic member 41, first spring 411, second spring 412, first outer shell 42, oil baffle 43, first oil baffle sealing ring 44, second oil baffle sealing ring 45, piston assembly 5, first connecting rod 51, first push plate 52, second push plate 53, push plate sealing ring 54, second connecting rod 55, damping oil plate 56, through hole 561, energy absorbing cavity 6, damping oil cavity 61, air cavity 62, buffer cavity 7, buffer assembly 8, second outer shell 81, end cover 82, first insert 9, first mounting through port 91, second insert 10. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0028] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0029] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be fixed connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements or the interaction of two elements, unless another definite limitation.For the ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific situation.

[0030] In addition, in the utility model, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features.Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B", including A scheme, or B scheme, or A and B scheme simultaneously meet.In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that the ordinary skilled person in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0031] To solve the above technical problem, please refer to Figures 1-2 The utility model proposes an anti-water hammer pipe fitting, which comprises:

[0032] A pipeline main body 1;

[0033] A first branch pipe 2 and a second branch pipe 3 are arranged in communication with the inner cavity of the pipeline main body 1, the first branch pipe 2 and the second branch pipe 3 are connected to the pipe wall of the pipeline main body 1 respectively, and the inner cavities of the first branch pipe 2 and the second branch pipe 3 are coaxially arranged;

[0034] An energy absorption assembly 4 and a piston assembly 5, the energy absorption assembly 4 is connected to the end of the first branch pipe 2 away from the pipeline main body 1, one end of the piston assembly 5 is connected to the energy absorption assembly 4 in the first branch pipe 2, the other end of the piston assembly 5 passes through the pipeline main body 1 and extends into the second branch pipe 3;The piston assembly 5, the energy absorption assembly 4 and the first branch pipe 2 form a closed energy absorption cavity 6, a buffer cavity 7 is formed between the other end of the piston assembly 5 away from the energy absorption assembly 4 and the second branch pipe 3, and the energy absorption cavity 6 and the buffer cavity 7 are coaxially arranged;

[0035] The energy-absorbing component 4 includes an elastic element 41, which is connected to the piston assembly 5 within the energy-absorbing cavity 6. The piston assembly 5 moves along the axial direction of the first branch pipe 2 and the second branch pipe 3. When the piston assembly 5 moves toward the energy-absorbing cavity 6, the elastic element 41 is deformed by force.

[0036] It should be noted that, as Figures 1-7 The directions A and B shown are the axial directions of the first branch pipe 2 and the second branch pipe 3, respectively. Directions A and B are on the same straight line. In all embodiments of this utility model, direction A is the direction in which the piston assembly 5 moves toward the energy absorption chamber 6, and direction B is the direction in which the piston assembly 5 moves toward the buffer chamber 7.

[0037] It should be noted that you should refer to [link / reference]. Figure 2 and Figure 3 The main body of the pipe 1 has an inlet 11 and an outlet 12 at each end. The inlet 11 and the outlet 12 are used to connect to the existing pipeline system. The structure of the inlet 11 and the outlet 12 is a common socket structure in existing pipelines, which is used for convenient connection with the existing pipeline system. Further, the pipe wall of the main body of the pipe 1 has two branch ports 13, which are respectively provided corresponding to the first branch pipe 2 and the second branch pipe 3. Specifically, the middle section of the piston assembly 5 is located in the inner cavity of the main body of the pipe 1, and the axial ends of the piston assembly 5 pass through the corresponding branch ports 13 and extend into the first branch pipe 2 and the second branch pipe 3.

[0038] Please see Figure 2 When water hammer occurs (in this embodiment, water hammer is caused by the sudden closure of a valve on the pipeline system), due to inertia, the water in the main body of the pipe 1 flows towards the energy-absorbing chamber 6 (see...). Figure 2 In direction A), the energy is concentrated and impacted on the piston assembly 5, causing the piston assembly 5 to move towards the energy-absorbing chamber 6, thereby causing the elastic element 41 to deform under force, converting the kinetic energy generated by the water hammer into the elastic potential energy of the elastic element 41, effectively reducing the peak pressure fluctuation when the water hammer occurs, and protecting the stable operation of the pipeline system; at this time, the volume of the energy-absorbing chamber 6 decreases, and the volume of the buffer chamber 7 increases.

[0039] Please see Figure 2 After the water hammer effect ends (it should be noted that the valves in the pipeline system are still closed at this time), the buffer chamber 7 can provide the necessary displacement space for the elastic element 41 to recover its deformation; specifically, under the restoring force of the elastic element 41, the piston assembly 5 is pushed towards the buffer chamber 7 (see...).Figure 2 When the piston assembly 5 moves in direction B), the volume of the buffer cavity 7 decreases, the volume of the energy absorption cavity 6 increases, and the elastic member 41 restores its deformation. It is particularly necessary to point out that the medium in the buffer cavity 7 is air.

[0040] By setting the piston assembly 5, the volume of the energy absorption cavity 6 and the buffer cavity 7 can be changed synchronously, and the energy absorption cavity 6 and the buffer cavity 7 can be linked: when facing the water flow impact, the piston assembly 5 is impacted by the water flow and moves, the elastic member 41 in the energy absorption cavity 6 deforms, and the kinetic energy generated by the water hammer is converted into the elastic potential energy of the elastic member 41, so that the energy absorption cavity 6 can quickly absorb the impact force generated by the water hammer when the water hammer occurs; and the buffer cavity 7 provides the necessary displacement space for the elastic member 41 to restore the deformation, which can ensure that the elastic member 41 can restore the deformation by itself after the water hammer ends, avoid the elastic member 41 being in a compressed or stretched state for a long time, effectively prolong the service life of the elastic member 41, and solve the technical problem that the energy absorption component of the water hammer eliminator in the prior art cannot reset after the water hammer influence ends. At the same time, the linkage between the energy absorption cavity 6 and the buffer cavity 7 makes the piston assembly 5 maintain dynamic balance, thereby ensuring that the pipeline system can run smoothly in a complex water flow environment.

[0041] Please refer to Figures 2-3 Further, the piston assembly 5 includes a first connecting rod 51, a first push plate 52 and a second push plate 53 arranged coaxially, and the axis of the first connecting rod 51 coincides with the axis of the energy absorption cavity 6 and the buffer cavity 7.

[0042] The first push plate 52 and the second push plate 53 are respectively connected to the two ends of the first connecting rod 51 in the axial direction, the first push plate 52 is located in the first branch pipe 2 and is in sliding connection with the first branch pipe 2, the second push plate 53 is located in the second branch pipe 3 and is in sliding connection with the second branch pipe 3, and the first push plate 52 and the inner pipe wall of the first branch pipe 2 are in sealing connection, and the second push plate 53 and the inner pipe wall of the second branch pipe 3 are in sealing connection.

[0043] The end surface of the first push plate 52 away from the second push plate 53 is connected with the elastic member 41.

[0044] The first connecting rod 51 is arranged to connect the first push plate 52 and the second push plate 53, so that the first push plate 52 and the second push plate 53 can move synchronously; the first push plate 52 also serves as a connecting point of the elastic member 41; when water hammer occurs, the first push plate 52 is pushed to move along direction A by water flow, at this time, the volume of the energy absorption cavity 6 is reduced, the elastic member 41 is extruded to deform, and at the same time, the first push plate 52 can drive the first connecting rod 51 and the second push plate 53 to move along direction A; after the influence of water hammer ends, the first push plate 52 is pushed to move along direction B under the restoring force of the deformation recovery of the elastic member 41, so as to drive the first connecting rod 51 and the second push plate 53 to move along direction B. Specifically, the elastic member 41 can be a spring, an elastic air bag or an elastic rubber ball.

[0045] The second push plate 53 is arranged to form the buffer cavity 7 between the second push plate 53 and the second branch pipe 3, so as to provide necessary displacement space for the elastic member 41 to recover deformation.

[0046] Specifically, referring to Figure 3 and Figure 4 , the first push plate 52 and the first branch pipe 2 are provided with a push plate sealing ring 54, so as to prevent water in the pipeline body 1 from entering the energy absorption cavity 6; the second push plate 53 and the second branch pipe 3 are provided with another push plate sealing ring 54, so as to prevent water in the pipeline body 1 from entering the buffer cavity 7.

[0047] Further, the first push plate 52 and the first connecting rod 51 are threadedly connected, and the second push plate 53 and the first connecting rod 51 are also threadedly connected, so as to facilitate installation and disassembly.

[0048] Referring to Figures 3-4 , further, the energy absorption assembly 4 further comprises a first shell 42, the first shell 42 is a cylindrical structure with one end open, one end of the first shell 42 is detachably connected to the end of the first branch pipe 2 away from the pipeline body 1, the first push plate 52 is slidably connected to the first shell 42, and the first push plate 52 and the inner circumferential wall of the first shell 42 are sealingly connected, the first push plate 52 and the first shell 42 form the closed energy absorption cavity 6 therebetween;

[0049] Referring to Figure 4The elastic member 41 comprises a first spring 411 inside the first shell 42, one end of the first spring 411 is fixedly connected with the end face of the first push plate 52 away from the second push plate 53, and the other end of the first spring 411 extends to the inner top wall of the first shell 42 in the axial direction of the first branch pipe 2.

[0050] It should be noted that by arranging the first shell 42, the first shell 42 is a one-end-opened cylindrical structure, the inner cavity of the first shell 42 is arranged in communication with the inner cavity of the first branch pipe 2, which can facilitate the formation of the energy absorption cavity 6 between the first shell 42 and the first push plate 52, and the detachable connection (such as threaded connection, clamping connection, etc.) between the first shell 42 and the first branch pipe 2. Of course, the first shell 42 and the first branch pipe 2 need to be in a sealed state to avoid water leakage of the first branch pipe 2), which can facilitate the installation, replacement or maintenance of the energy absorption assembly 4.

[0051] Specifically, referring to Figure 4 The first push plate 52 and the inner peripheral wall of the first shell 42 are provided with the push plate sealing ring 54 to seal the energy absorption cavity 6 and prevent water inside the pipeline body 1 from entering the energy absorption cavity 6.

[0052] Please refer to Figure 4 and Figure 5 Further, the energy absorption assembly 4 further comprises an oil baffle 43, which is detachably connected to the inside of the first shell 42, and the oil baffle 43 divides the energy absorption cavity 6 into a damping oil cavity 61 and an air cavity 62, the damping oil cavity 61 and the air cavity 62 are arranged in sequence along the axial direction of the first shell 42, and the damping oil cavity 61 is arranged away from the opening end of the first shell 42;

[0053] The piston assembly 5 further comprises a second connecting rod 55 and a damping oil plate 56, one end of the second connecting rod 55 is connected with the first push plate 52, the other end of the second connecting rod 55 is connected with the damping oil plate 56 after penetrating through the oil baffle 43, the second connecting rod 55 and the oil baffle 43 are slidingly connected, and the damping oil plate 56 is slidingly connected with the first shell 42 in the damping oil cavity 61; The damping oil plate 56 is provided with a plurality of through holes 561 along the plate surface for the damping oil in the damping oil cavity 61 to pass through; Further, the plurality of through holes 561 are uniformly distributed.

[0054] The first spring 411 is arranged in the damping oil cavity 61, one end of the first spring 411 is fixedly connected with the damping oil plate 56 away from the end surface of the first push plate 52, and the other end of the first spring 411 extends to the inner top wall of the first shell 42 in the axial direction of the first shell 42.

[0055] Further explanation, please refer to Figure 4 The damping oil plate 56 can move in the axial direction of the first shell 42; the medium in the damping oil cavity 61 is damping oil and a small amount of air, the oil baffle 43 is provided with a through hole for the second connecting rod 55 to pass through, and the first oil blocking sealing ring 44 is arranged between the oil baffle 43 and the inner circumferential wall of the first shell 42, and the second oil blocking sealing ring 45 is arranged between the oil baffle 43 and the outer circumferential wall of the second connecting rod 55, so as to seal the damping oil cavity 61 by arranging the first oil blocking sealing ring 44 and the second oil blocking sealing ring 45, so as to avoid the damping oil in the damping oil cavity 61 from entering the air cavity 62.

[0056] Further explanation, the air cavity 62 is a cavity naturally formed during the movement of the piston assembly 5, when the piston assembly 5 moves in the direction A, the first push plate 52 moves towards the oil baffle 43, the damping oil plate 56 compresses the first spring 411 in the damping oil cavity 61, and when the first push plate 52 abuts against the oil baffle 43, the compression amount of the first spring 411 is maximum; when the first spring 411 restores, the damping oil plate 56 is pushed to move in the direction B under the action of the restoring force of the first spring 411, and the second connecting rod 55, the first push plate 52, the first connecting rod 51 and the second push plate 53 are also moved in the direction B. Since the first push plate 52 is in sealing connection with the first shell 42, when the first push plate 52 moves away from the oil baffle 43, the air cavity 62 is naturally formed.

[0057] By arranging the damping oil cavity 61 and the damping oil plate 56, when the water hammer occurs, the water flow impacts the first push plate 52 to move in the direction A, drives the second connecting rod 55 and the damping oil plate 56 to move in the direction A and compresses the first spring 411, the first spring 411 is deformed under force, converts the kinetic energy generated by the water hammer into the elastic potential energy of the first spring 411, and at the same time, the damping oil in the damping oil cavity 61 can pass through the through hole 561, and the damping oil generates heat when passing through the through hole 561, so as to convert the kinetic energy generated by the water hammer into the heat energy of the damping oil, further reduces the peak value of pressure fluctuation when the water hammer occurs, and protects the stable operation of the pipeline system.

[0058] In addition, since the medium in the damping oil cavity 61 is damping oil and a small amount of air, and the first spring 411 is arranged in the damping oil cavity 61, the damping oil can make the damping oil plate 56 move more smoothly through the damping characteristics of the damping oil, thereby improving the stability of the anti-water hammer pipe during operation.

[0059] Please refer to Figure 4 Further, the elastic member 41 further comprises a second spring 412 arranged in the damping oil cavity 61, one end of the second spring 412 is fixedly connected to the end face of the oil baffle 43 away from the first push plate 52, and the other end of the second spring 412 extends to the damping oil plate 56 along the axial direction of the first housing 42.

[0060] Specifically, when water hammer occurs, the water flow impacts the first push plate 52 to move in the direction A, driving the second connecting rod 55 and the damping oil plate 56 to move in the direction A, at this time, the first spring 411 is compressed, and the second spring 412 is stretched, that is, the first spring 411 and the second spring 412 are deformed at the same time when water hammer occurs, and the kinetic energy generated by water hammer is converted into elastic potential energy; by adding the second spring 412, the first spring 411 and the second spring 412 can jointly absorb the energy generated by water hammer, effectively reducing the pressure fluctuation peak value when water hammer occurs, and improving the overall performance of the energy absorption assembly 4.

[0061] Please refer to Figures 3-4 Further, the axis of the second connecting rod 55 coincides with the axis of the first connecting rod 51, and the second spring 412 is arranged on the outer circumferential side of the second connecting rod 55, and the axes of the first spring 411 and the second spring 412 coincide.

[0062] The axes of the first connecting rod 51 and the second connecting rod 55 coincide, and by arranging the second spring 412 on the outer circumferential side of the second connecting rod 55, and coaxially arranging the second spring 412 and the first spring 411, the forces on the second spring 412 and the first spring 411 are more uniform when the piston assembly 5 moves axially.

[0063] Further, the inner top wall of the first housing 42, the end faces of the two axial ends of the damping oil plate 56, and the end face of the oil baffle 43 towards the damping oil plate 56 are respectively provided with annular spring fixing seats, and the spring fixing seats are used to install the corresponding first spring 411 and second spring 412.

[0064] Please refer to Figures 2-3Further, the anti-water hammer pipe further comprises a buffer assembly 8, the buffer assembly 8 comprises a second shell 81 and an end cover 82, the second shell 81 is a cylindrical structure with both ends open, the second shell 81 is detachably connected to one end of the second branch pipe 3 away from the pipeline body 1, the inner cavity of the second shell 81 and the inner cavity of the second branch pipe 3 are in communication with each other, and the end cover 82 is detachably connected to the end of the second shell 81 away from the second branch pipe 3.

[0065] The second push plate 53 is in sliding connection with the second shell 81 in the second shell 81, and the second push plate 53 and the inner circumferential wall of the second shell 81 are in sealed connection, and the second push plate 53, the second shell 81 and the end cover 82 form a closed buffer cavity 7.

[0066] By setting the detachable second shell 81 and the end cover 82, the installation and maintenance of the second push plate 53 can be facilitated. Further, the second shell 81 and the second branch pipe 3 are in threaded connection, and the second shell 81 and the second branch pipe 3 need to be in a sealed state to avoid water leakage of the second branch pipe 3; further, the end cover 82 and the second shell 81 are in threaded connection, and by setting the end cover 82, the second shell 81 can be further sealed to prevent water leakage of the anti-water hammer pipe.

[0067] Please refer to Figure 2 and Figure 6 Further, one end of the first branch pipe 2 is fixedly connected to the outer circumferential wall of the pipeline body 1, and the other end of the first branch pipe 2 is inclined upward towards the water outlet end of the pipeline body 1; one end of the second branch pipe 3 is fixedly connected to the outer circumferential wall of the pipeline body 1, and the other end of the second branch pipe 3 is inclined downward towards the water inlet end of the pipeline body 1.

[0068] When the valve in the pipeline system is suddenly closed to cause water hammer phenomenon, the water flow will continue to maintain the original flow direction under the action of inertia, and due to the closing of the valve, the water flow will have a tendency to move upward, by inclining the first branch pipe 2 and the second branch pipe 3 relative to the pipeline body 1 respectively, and the first branch pipe 2 is inclined upward towards the water outlet end of the pipeline body 1, which helps to make the water flow in the pipeline body 1 gather in the first branch pipe 2 and impact the piston assembly 5.

[0069] Please refer to Figure 4 and Figure 7Further, the anti-water hammer pipe further comprises a first insert 9 fixedly connected to one end of the first branch pipe 2 away from the pipe body 1, and the outer circumferential side of the first insert 9 is fixedly connected to the inner circumferential side of the first branch pipe 2.

[0070] The first housing 42 is threadedly connected to the first insert 9, and the axial end face of the first insert 9 is provided with a first mounting through hole 91 for mounting the first housing 42.

[0071] The first insert 9 can enhance the structural strength of the end of the first branch pipe 2. The first housing 42 is threadedly connected to the first insert 9, which can facilitate the installation and replacement of the first housing 42, that is, the energy absorption assembly 4. Further, the first insert 9 is made of metal.

[0072] Please refer to Figure 3 Further, the anti-water hammer pipe further comprises a second insert 10 fixedly connected to one end of the second branch pipe 3 away from the pipe body 1, and the outer circumferential side of the second insert 10 is fixedly connected to the inner circumferential side of the second branch pipe 3.

[0073] The second housing 81 is threadedly connected to the second insert 10, and the axial end face of the second insert 10 is provided with a second mounting through hole for mounting the second housing 81.

[0074] The second insert 10 can enhance the structural strength of the end of the second branch pipe 3. The second housing 81 is threadedly connected to the second insert 10, which can facilitate the installation and replacement of the second housing 81. Further, the second insert 10 is made of metal, and the structure of the second insert 10 is the same as that of the first insert 9.

[0075] Further, the pipe body 1, the first branch pipe 2 and the second branch pipe 3 are integrally formed, and specifically, the pipe body 1, the first branch pipe 2 and the second branch pipe 3 are made of plastic, preferably, the pipe body 1, the first branch pipe 2 and the second branch pipe 3 are PP-R pipes (also known as three-type polypropylene pipes or random copolymer polypropylene pipes).

[0076] Further, the first insert 9 and the second insert 10 are manufactured by injection molding process with the pipe body 1, the first branch pipe 2 and the second branch pipe 3.

[0077] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. An anti-water hammer pipe fitting, characterized by, The utility model relates to a pipeline energy absorption device, which comprises a pipeline body, a first branch pipe and a second branch pipe arranged in communication with the inner cavity of the pipeline body, the first branch pipe and the second branch pipe being connected to the wall of the pipeline body, and the inner cavities of the first branch pipe and the second branch pipe being coaxially arranged, an energy absorption assembly and a piston assembly, the energy absorption assembly being connected to the end of the first branch pipe away from the pipeline body, one end of the piston assembly being connected to the energy absorption assembly in the first branch pipe, the other end of the piston assembly extending through the pipeline body and into the second branch pipe, a closed energy absorption cavity being formed between the piston assembly, the energy absorption assembly and the first branch pipe, a buffer cavity being formed between the end of the piston assembly away from the energy absorption assembly and the second branch pipe, and the energy absorption cavity and the buffer cavity being coaxially arranged, the energy absorption assembly comprising an elastic member connected to the piston assembly in the energy absorption cavity, the piston assembly moving in the axial direction of the first branch pipe and the second branch pipe, and the elastic member being deformed under force when the piston assembly moves in the direction of the energy absorption cavity. The piston assembly comprises a first connecting rod, a first push plate and a second push plate arranged coaxially, and the axis of the first connecting rod coincides with the axes of the energy absorption cavity and the buffer cavity. The first push plate and the second push plate are connected to the two axial ends of the first connecting rod, the first push plate is located in the first branch pipe and is in sliding connection with the first branch pipe, the second push plate is located in the second branch pipe and is in sliding connection with the second branch pipe, the first push plate is in sealed connection with the inner wall of the first branch pipe, the second push plate is in sealed connection with the inner wall of the second branch pipe, and the end surface of the first push plate away from the second push plate is connected to the elastic member. The energy absorption assembly further comprises a first housing, which is a cylindrical structure with one end open, the open end of the first housing being detachably connected to the end of the first branch pipe away from the pipeline body, the first push plate being in sliding connection with the first housing in the first housing, and the first push plate being in sealed connection with the inner circumferential wall of the first housing, a closed energy absorption cavity being formed between the first push plate and the first housing. The elastic member comprises a first spring located inside the first housing, one end of the first spring being fixedly connected to the end surface of the first push plate away from the second push plate, and the other end of the first spring extending in the axial direction of the first branch pipe and being fixedly connected to the inner top wall of the first housing.

2. The anti-water hammer pipe fitting of claim 1, wherein, The energy absorption assembly further comprises an oil baffle, which is detachably connected to the inside of the first housing, the oil baffle dividing the energy absorption cavity into a damping oil cavity and an air cavity, the damping oil cavity and the air cavity being arranged in sequence in the axial direction of the first housing, and the damping oil cavity being arranged away from the open end of the first housing. ​ ​ 3. The anti-water hammer pipe fitting of claim 2, wherein, ​ ​ 4. The anti-water hammer pipe fitting of claim 3, wherein, ​ The piston assembly further comprises a second connecting rod and a damping oil plate, one end of the second connecting rod is connected with the first push plate, the other end of the second connecting rod is connected with the damping oil plate after penetrating through the oil baffle, the second connecting rod is in sliding connection with the oil baffle, and the damping oil plate is in sliding connection with the first shell in the damping oil cavity; a plurality of through holes are formed in the damping oil plate along the plate surface to allow the damping oil in the damping oil cavity to pass through. The first spring is arranged in the damping oil cavity, one end of the first spring is fixedly connected with the end surface of the damping oil plate away from the first push plate, and the other end of the first spring extends to the inner top wall of the first shell in the axial direction of the first shell.

5. The anti-water hammer pipe fitting of claim 4, wherein, The elastic member further comprises a second spring arranged in the damping oil cavity, one end of the second spring is fixedly connected with the end surface of the oil baffle away from the first push plate, and the other end of the second spring extends to be fixedly connected with the damping oil plate in the axial direction of the first shell.

6. The anti-water hammer pipe fitting of claim 5, wherein, The axis of the second connecting rod coincides with the axis of the first connecting rod, and the second spring is sleeved on the outer circumferential side of the second connecting rod, and the axes of the first spring and the second spring coincide.

7. The anti-water hammer pipe fitting of claim 2, wherein, The anti-water hammer pipe fitting further comprises a buffer assembly, the buffer assembly comprises a second shell and an end cover, the second shell is a cylindrical structure with two open ends, the second shell is detachably connected to one end of the second branch pipe away from the pipe body, the inner cavity of the second shell is in communication with the inner cavity of the second branch pipe, and the end cover is detachably connected to the end portion of the second shell away from the second branch pipe. The second push plate is in sliding connection with the second shell in the second shell, and the second push plate is in sealing connection with the inner circumferential wall of the second shell, and the second push plate, the second shell and the end cover form the closed buffer cavity.

8. The anti-water hammer pipe fitting of claim 1, wherein, One end of the first branch pipe is fixedly connected with the outer circumferential wall of the pipe body, and the other end of the first branch pipe is upwardly inclined to the water outlet end of the pipe body; one end of the second branch pipe is fixedly connected with the outer circumferential wall of the pipe body, and the other end of the second branch pipe is downwardly inclined to the water inlet end of the pipe body.

9. The anti-water hammer pipe fitting of claim 3, wherein, The anti-water hammer pipe fitting further comprises a first insert, the first insert is fixedly connected to one end of the first branch pipe away from the pipe body, and the outer circumferential side of the first insert is fixedly connected with the inner circumferential side of the first branch pipe. The first shell is in threaded connection with the first insert, and the axial end surface of the first insert is provided with a first mounting through hole for mounting the first shell.

10. The anti-water hammer pipe fitting of claim 7, wherein, The anti-water hammer pipe fitting further comprises a second insert, the second insert is fixedly connected to one end of the second branch pipe away from the pipe body, and the outer circumferential side of the second insert is fixedly connected with the inner circumferential side of the second branch pipe. The second shell is in threaded connection with the second insert, and the axial end surface of the second insert is provided with a second mounting through hole for mounting the second shell.

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