Exhaust pressure relief structure

Abstract

The utility model discloses an exhaust pressure relief structure which comprises a valve body, a pressure relief assembly and an exhaust assembly, the valve body is provided with a first connecting port, a second connecting port and a third connecting port, the first connecting port, the second connecting port and the third connecting port are communicated in the valve body, and the valve body is connected with a pipeline through the first connecting port. The pressure relief assembly is connected with the second connector, and the exhaust assembly is connected with the third connector. A traditional double-valve structure is simplified into an integrated design, the requirements for exhaust and pressure relief can be met only through one-time installation, the number of connecting points is remarkably reduced, and the machining cost and the assembly complexity are reduced. Meanwhile, by reducing the number of external connecting interfaces, the risk of water leakage caused by sealing failure is effectively reduced. In addition, the pressure relief assembly and the exhaust assembly form function complementation in the single valve body and do not interfere with each other, response delay possibly existing in traditional double-valve installation is avoided, the system reliability is improved through structural optimization, and balance of efficient integration and cost control is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to exhaust pressure relief technical field, concretely relates to an exhaust pressure relief structure. BACKGROUND

[0002] In the traditional water pipeline system, it is usually necessary to install an automatic exhaust valve and a safety valve respectively to deal with two types of problems: one is to discharge the gas mixed in the pipeline to avoid the accumulation of gas bubbles to form air resistance and affect the stability of water flow; the second is to relieve pressure when the pipeline pressure abnormally rises to prevent system overpressure from causing safety hazards. However, in the prior art, since the exhaust valve and the safety valve are independent components, they need to be installed twice and set their own threaded connection points, which leads to complicated assembly process, low efficiency, and high processing and procurement cost of double valve bodies. In addition, the independent installation of two valve bodies means that more space needs to be reserved in the pipeline system, which is difficult to adapt in narrow environments, and the existence of double connection points increases the potential risk of seal failure, significantly increasing the probability of water leakage. Although there are mature independent exhaust valve and safety valve products on the market, their features of functional separation and structural redundancy cannot meet the needs of modern industry for integration, low cost and high reliability. SUMMARY

[0003] Therefore, the utility model provides an exhaust pressure relief structure, which solves the technical problems of complicated assembly process, large space occupation and seal failure risk caused by the independent installation of exhaust valves and safety valves in the prior art.

[0004] To solve the above problems, according to one aspect of the present application, the utility model provides an exhaust pressure relief structure, which comprises a valve body, a pressure relief assembly and an exhaust assembly, the valve body has a first connection port, a second connection port and a third connection port, the first connection port, the second connection port and the third connection port are communicated inside the valve body, the valve body is connected with a pipeline through the first connection port, the pressure relief assembly is connected with the second connection port, and the exhaust assembly is connected with the third connection port.

[0005] In some embodiments, the pressure relief assembly comprises a plugging unit and a first elastic member, one end of the plugging unit faces the second connection port, and the first elastic member is located at the other end of the plugging unit; under the action of water pressure in the pipeline, the first elastic member has a first state of moving the plugging unit away from the second connection port and a second state of tightly fitting the plugging unit with the second connection port.

[0006] In some embodiments, the pressure relief assembly further comprises a pressure relief shell, and a drain port is formed in the pressure relief shell; when the first elastic member is in the first state, the second connection port is communicated with the drain port.

[0007] In some embodiments, the plugging unit comprises a rubber block with one open end, the closed end of the rubber block faces the second connecting port, a pressing rod is arranged in the open end of the rubber block, and the first elastic member is sleeved on the pressing rod.

[0008] In some embodiments, the pressure relief assembly further comprises an active pressure relief unit, the output end of the active pressure relief unit acts on the pressing rod, and the rubber block can be lifted by the pressing rod.

[0009] In some embodiments, the active pressure relief unit comprises a handle, a three-jaw chuck, and a clamping piece, the input end of the three-jaw chuck is connected with the handle, the output end of the three-jaw chuck acts on the pressing rod, and the clamping piece is connected with the three-jaw chuck; the handle drives the three-jaw chuck to rotate, so that the three-jaw chuck is located at a first position or a second position of the clamping piece, wherein the pressing rod has different heights corresponding to the first position and the second position.

[0010] In some embodiments, the clamping piece has grooves arranged at intervals in the circumferential direction, the groove bottoms have slopes; when the three-jaw chuck is located at the first position with a lower slope, the rubber block plugs the second connecting port, and when the three-jaw chuck is located at the second position with a higher slope, the rubber block is lifted and releases the second connecting port.

[0011] In some embodiments, the exhaust assembly comprises an exhaust shell, a float, a swing rod, and a second elastic member in the exhaust shell, one side of the exhaust shell has an exhaust port, the swing rod is inserted into the float, and the second elastic member is sleeved on the swing rod; under the action of buoyancy, the swing rod can plug the exhaust port; under the action of gas pressure and / or the second elastic member, the swing rod can move downward to release the exhaust port.

[0012] In some embodiments, the exhaust shell comprises a first shell, a second shell, and a connecting piece, the first shell and the second shell are arranged opposite to each other, the connecting piece is sleeved on the first shell and the second shell, and one end of the connecting piece acts on the first shell and the other end acts on the second shell.

[0013] In some embodiments, the first connecting port of the valve body is connected with a pipeline through a union joint.

[0014] In some embodiments, a filter screen is arranged at the first connecting port; and / or a pressure sensor is arranged at the first connecting port; and / or a pressure switch is arranged at the first connecting port.

[0015] Compared with the prior art, the exhaust pressure relief structure has at least the following beneficial effects:

[0016] The exhaust pressure relief structure provided by the utility model discloses a valve body, a pressure relief assembly and an exhaust assembly, the valve body has a first connecting port, a second connecting port and a third connecting port, the first connecting port, the second connecting port and the third connecting port are communicated inside the valve body, the valve body is connected with a pipeline through the first connecting port, the pressure relief assembly is connected with the second connecting port, and the exhaust assembly is connected with the third connecting port.

[0017] The utility model discloses a single valve body integrates the exhaust valve and the safety valve function of traditional independent installation, solves multiple problems in traditional scheme. First, the traditional double valve structure is simplified into integrated design, and only once installation can cover exhaust and pressure relief demand, and the number of connecting points is reduced, and processing cost and assembly complexity are reduced. Secondly, the compact valve body structure reduces the space required by the traditional double valve layout, and is more suitable for narrow environment. At the same time, by reducing the number of external connecting interfaces, the originally two independent sealing systems are integrated into the valve main interface and the internal channel cooperative action, effectively reducing the risk of water leakage caused by sealing failure. In addition, the first connecting port, the second connecting port and the third connecting port are communicated inside the valve body, so that gas accumulation and pressure fluctuation can trigger the corresponding assembly simultaneously: the gas is discharged through the exhaust assembly at the top, avoiding gas resistance formation;When the pressure is abnormal, the pressure relief assembly directly responds to release pressure, and the two form a function complementary and non-interfering in a single valve body, avoiding the response delay that may exist in the installation of traditional double valve, and improving the system reliability through structure optimization, realizing the balance of efficient integration and cost control.

[0018] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail below. DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0020] Figure 1 It is a structure schematic view of the exhaust pressure relief structure provided by the embodiment of the utility model;

[0021] Figure 2 It is another angle structure schematic view of the exhaust pressure relief structure provided by the embodiment of the utility model;

[0022] Figure 3is a sectional view of the exhaust pressure relief structure provided by the embodiment of the utility model;

[0023] Figure 4 is a sectional view of the exhaust assembly in the exhaust pressure relief structure provided by the embodiment of the utility model;

[0024] Figure 5 is a sectional view of the pressure relief assembly in the exhaust pressure relief structure provided by the embodiment of the utility model;

[0025] Figure 6 is a structure schematic view of the clamping piece in the exhaust pressure relief structure provided by the embodiment of the utility model;

[0026] Figure 7 is a structure schematic view of the three-jaw chuck in the exhaust pressure relief structure provided by the embodiment of the utility model;

[0027] Figure 8 is a front view of the exhaust pressure relief structure provided by the embodiment of the utility model;

[0028] Figure 9 is a front view of the float in the exhaust pressure relief structure provided by the embodiment of the utility model;

[0029] Figure 10 is a side view of the float in the exhaust pressure relief structure provided by the embodiment of the utility model.

[0030] Wherein:

[0031] 1, valve body;2, pressure relief assembly;21, plugging unit;22, first elastic piece;23, pressure relief shell;24, drain port;25, active pressure relief unit;211, rubber block;212, pressure rod;251, handle;252, three-jaw chuck;253, clamping piece;2531, recess;3, exhaust assembly;31, exhaust shell;32, float;33, swing rod;34, second elastic piece;35, exhaust port;36, sealing cap;37, gland;311, first shell;312, second shell;313, connecting piece;4, union. DETAILED DESCRIPTION

[0032] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the following combines the drawings and the preferred embodiments, and the specific implementation, structure, features and effects according to the utility model application are described in detail as follows.In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment.In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0033] In the description of the utility model, it is necessary to make clear, the utility model's description and the claim and the above mentioned drawing in the term "first", "second" and the like are for distinguishing similar object, and do not have to be used to describe specific order or antecedence order;The terms "vertical", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, merely for the convenience of describing the utility model, and do not mean that the device or element indicated must have a particular orientation or position, therefore, can not be understood as the limitation of the utility model.

[0034] In the description of the utility model, it is necessary to make clear, the utility model's description and the claim and the above mentioned drawing in the term "first", "second" and the like are for distinguishing similar object, and do not have to be used to describe specific order or antecedence order;The terms "vertical", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, merely for the convenience of describing the utility model, and do not mean that the device or element indicated must have a particular orientation or position, therefore, can not be understood as the limitation of the utility model.

[0035] The embodiment provides a kind of exhaust pressure relief structure, as shown in Figures 1-10 It includes valve body 1, pressure relief assembly 2 and exhaust assembly 3, the valve body 1 has first connecting port, second connecting port and third connecting port, the first connecting port, second connecting port and third connecting port are communicated in the valve body 1 interior, the valve body 1 is connected with pipeline by the first connecting port, the pressure relief assembly 2 is connected with the second connecting port, and the exhaust assembly 3 is connected with the third connecting port.

[0036] In the embodiment, valve body 1 as core structure, by its first connecting port directly with pipeline connection, second connecting port installs pressure relief assembly 2, third connecting port installs exhaust assembly 3, three interfaces form communicating passage in valve body interior.Valve body 1 is integrated exhaust and pressure relief function, and the action requirement of two components is unified and coordinated by internal passage.Pressure relief assembly 2 is usually installed in the side of valve body or pressure sensitive area.Exhaust assembly 3 is mostly located at the top of valve body where gas is easy to gather.

[0037] The embodiment integrates the functions of the exhaust valve and the safety valve in a single valve body, solving the multiple problems in the traditional scheme. First, the traditional double-valve structure is simplified to an integrated design, covering the exhaust and pressure relief requirements with only one installation, significantly reducing the number of connection points and the processing cost and assembly complexity. Second, the compact valve body structure reduces the space required by the traditional double-valve layout, better adapting to narrow environments. At the same time, by reducing the number of external connection interfaces, the two independent sealing systems are integrated into the valve body main interface and internal channel, effectively reducing the risk of water leakage caused by sealing failure. In addition, the first connection port, the second connection port, and the third connection port are connected inside the valve body 1, allowing gas accumulation and pressure fluctuations to trigger corresponding components simultaneously: gas is discharged through the top exhaust assembly 3 to avoid gas blockage; when the pressure is abnormal, the pressure relief assembly 2 directly responds to release the pressure, both in a single valve body, complementing each other's functions without interfering with each other, avoiding the response delay that may exist in traditional double-valve installation, and improving system reliability through structural optimization, achieving a balance between efficient integration and cost control.

[0038] In specific embodiments, the pressure relief assembly 2 includes a blocking unit 21 and a first elastic member 22, one end of the blocking unit 21 facing the second connection port, and the first elastic member 22 being located at the other end of the blocking unit 21; under the action of water pressure in the pipeline, the first elastic member 22 has a first state in which the blocking unit 21 moves away from the second connection port, and a second state in which the blocking unit 21 tightly fits with the second connection port.

[0039] The blocking unit 21 is located in the pressure relief assembly 2, one end facing the second connection port of the valve body 1, and the other end connected with the first elastic member 22. Its function is to control the opening and closing of the pressure relief channel by contacting or separating from the second connection port; the first elastic member 22 is fixed at the end of the blocking unit 21 away from the second connection port, providing a reverse force through its elastic deformation, used to adjust the position of the blocking unit 21 to adapt to the change of pipeline pressure. In addition, the first state refers to when the water pressure in the pipeline exceeds the safety threshold, the water pressure overcomes the elastic force of the first elastic member 22, pushing the blocking unit 21 to move away from the second connection port, opening the pressure relief channel and achieving pressure relief; the second state is under normal pressure, the elastic force of the first elastic member 22 is greater than the water pressure, pressing the blocking unit 21 tightly on the second connection port, closing the pressure relief channel and maintaining the sealing of the system.

[0040] In the embodiment, when the pipeline is in normal operation, the elastic force of the first elastic member 22 makes the sealing unit 21 tightly adhere to the second connecting port to form a seal (second state), thereby preventing fluid leakage; when the pressure in the pipeline abnormally rises, the water pressure on the sealing unit 21 exceeds the preset elastic force of the first elastic member 22, the sealing unit 21 is pushed away from the second connecting port, the pressure relief channel is opened (first state), the high-pressure fluid is discharged through the second connecting port of the valve body 1, and after the pressure falls, the first elastic member 22 pushes the sealing unit 21 to reset and reseal, thereby realizing automatic pressure relief.

[0041] In addition, the first elastic member 22 is a spring.

[0042] In the specific embodiment, the pressure relief assembly 2 further comprises a pressure relief shell 23, and a drain port 24 is formed in the pressure relief shell 23; when the first elastic member 22 is in the first state, the second connecting port is in communication with the drain port 24.

[0043] The pressure relief shell 23 serves as the shell of the pressure relief assembly 2 and is connected to the second connecting port of the valve body 1, and the inside of the pressure relief shell 23 accommodates the sealing unit 21 and the first elastic member 22, thereby fixing the structure of the assembly and forming a pressure relief channel; the drain port 24 is formed in the side wall of the pressure relief shell 23 and is used to guide the discharged fluid to the outside environment during pressure relief. When the pipeline is in the first state (overpressure), the sealing unit 21 is pushed away from the second connecting port by the water pressure, at this time, the pressure relief channel in the pressure relief shell 23 is through, the second connecting port is in communication with the drain port 24, and the high-pressure fluid is discharged through the drain port 24 for pressure relief; in the second state (normal pressure), the sealing unit 21 tightly adheres to the second connecting port under the action of the elastic force of the first elastic member 22, at this time, the passage between the drain port 24 and the second connecting port in the pressure relief shell 23 is closed, and the system maintains a sealed state.

[0044] In the specific embodiment, the sealing unit 21 comprises a rubber block 211 with one end open, the closed end of the rubber block 211 faces the second connecting port, a pressure rod 212 is arranged in the open end of the rubber block 211, and the first elastic member 22 is sleeved on the pressure rod 212. The first elastic member 22 is a spring, the spring has controllable elastic deformation and accurate reset, and can accurately match the system pressure relief threshold value through preset rigidity.

[0045] The closed end of the rubber block 211 is directed to the second connecting port of the valve body 1, and the flexibility thereof can tightly fit the edge of the connecting port to form a dynamic seal, while the press rod 212 embedded in the open end extends into the interior of the rubber block, for transmitting the elastic force of the first elastic member 22 and restricting the deformation direction of the rubber block; the combination of the press rod 212 and the spring can ensure that the rubber block 211 stably moves along the axis when subjected to force, avoiding deflection to cause sealing failure. Under normal pressure, the elastic force of the spring presses the rubber block 211 tightly on the second connecting port through the press rod 212, and the elastic deformation of the rubber fills the interface gap to achieve sealing; when the water pressure exceeds the limit, the fluid pressure pushes the rubber block 211 to compress the spring in the direction of the press rod 212, and the rubber block 211 is separated from the second connecting port to form a pressure relief gap, through which the high-pressure fluid enters the pressure relief shell 23 and is discharged from the drain port 24; after the pressure is restored, the spring pushes the press rod 212 to reset, and the rubber block 211 reseals the connecting port.

[0046] In specific embodiments, the pressure relief assembly 2 further comprises an active pressure relief unit 25, an output end of the active pressure relief unit 25 acting on the press rod 212, which can lift the rubber block 211 through the press rod 212.

[0047] The active pressure relief unit 25 is used to trigger the pressure relief action through external control, and the output end thereof is connected to the press rod 212, which can directly exert external force to lift the press rod 212, thereby forcibly separating the rubber block 211 from the second connecting port and opening the pressure relief channel. This active pressure relief function is usually used in abnormal pressure fluctuation scenarios, such as when the system needs emergency pressure relief without reaching the preset pressure relief threshold (e.g., due to equipment failure or misoperation causing a sudden pressure rise without triggering the spring to automatically relieve pressure), or manual intervention is required for rapid pressure relief, and it can also serve as a redundant backup for the automatic pressure relief mechanism to forcibly open the pressure relief channel when the spring fails or the seal is stuck, ensuring system safety.

[0048] In specific embodiments, the active pressure relief unit 25 comprises a handle 251, a three-jaw chuck 252, and a clamping piece 253, an input end of the three-jaw chuck 252 being connected to the handle 251, an output end of the three-jaw chuck 252 acting on the press rod 212, and the clamping piece 253 being connected to the three-jaw chuck 252; the handle 251 drives the three-jaw chuck 252 to rotate, so that the three-jaw chuck 252 is located at a first position or a second position of the clamping piece 253, wherein the press rod 212 corresponding to the first position and the second position has different heights. For convenience of description, it is assumed that the second position is higher.

[0049] In the embodiment, the handle 251 is located outside the pressure relief assembly 2 as a manual operating part, and its rotation can drive the three-jaw chuck 252 connected therewith to rotate, and convert the rotary motion into the lifting action of the pressure rod 212 through mechanical transmission; the three-jaw chuck 252 serves as a transmission mechanism, and its input end is connected with the handle 251, and its output end is in contact with the pressure rod 212, and the height of the pressure rod 212 is changed through the radial expansion or axial displacement of the three-jaw structure; the clamping piece 253 cooperates with the three-jaw chuck 252, and the three-jaw chuck 252 is locked at the first position or the second position through the preset clamping groove or limiting structure, so as to ensure that the pressure rod 212 stably stays at a specific height.

[0050] When forced pressure relief is needed, the operator rotates the handle 251 to drive the three-jaw chuck 252 to rotate, and the jaw part is switched from the first position to the second position under the guidance of the clamping piece 253, at this time, the output end of the three-jaw chuck 252 pushes the pressure rod 212 to lift upward, and the pressure rod 212 drives the rubber block 211 to separate from the second connecting port of the valve body 1, so as to forcibly open the pressure relief channel; after the pressure relief is completed, the handle 251 is reversely rotated, the three-jaw chuck 252 is reset to the first position, the pressure rod 212 is retracted under the action of the spring, and the rubber block 211 reseals the second connecting port, so as to realize the precise pressure relief and reset of manual control.

[0051] In specific embodiments, the clamping piece 253 has recesses 2531 arranged at intervals in the circumferential direction, and the groove bottom of the recess 2531 has a slope; when the three-jaw chuck 252 is located at the first position with a lower slope, the rubber block 211 blocks the second connecting port, and when the three-jaw chuck 252 is located at the second position with a higher slope, the rubber block 211 is lifted and releases the second connecting port.

[0052] The specific structure of the clamping piece 253 is that a plurality of recesses 2531 are uniformly distributed around the circumference thereof, and the bottom of each recess is designed as an inclined slope, that is, the groove bottom gradually rises from one end to the other end to form a slope difference, wherein the end with a lower slope corresponds to the first position (sealing state), and the end with a higher slope corresponds to the second position (pressure relief state).

[0053] When the operator rotates the handle 251, the three-jaw chuck 252 is driven to rotate, and the jaw part is embedded in the recess 2531 of the clamping piece 253 and slides along the groove bottom slope: when the three-jaw chuck 252 rotates to the first position with a lower slope, the shallow depth of the recess keeps the jaw part at a low position, the pressure rod 212 is not lifted, and the rubber block 211 blocks the second connecting port; when the handle 251 is continuously rotated to the second position with a higher slope, the jaw part climbs along the slope, pushes the three-jaw chuck 252 to axially lift as a whole, and then lifts the rubber block 211 from the second connecting port through the pressure rod 212, so as to forcibly open the pressure relief channel. The gradual change of the slope makes the movement of the jaw part smooth and controllable, and the circumferential interval distribution of the recess 2531 provides clear positioning feedback, so as to ensure the stability of the pressure relief on-off state.

[0054] In specific embodiments, the exhaust assembly 3 comprises an exhaust casing 31, a float 32, a swing lever 33 and a second elastic member 34 in the exhaust casing 31, the exhaust casing 31 has an exhaust port 35 on one side, the swing lever 33 is inserted into the float 32, and the second elastic member 34 is sleeved on the swing lever 33; under the action of buoyancy, the swing lever 33 can block the exhaust port 35; under the action of gas pressure and / or the second elastic member 34, the swing lever 33 can move downward to release the exhaust port 35.

[0055] The exhaust casing 31 serves as the shell of the exhaust assembly 3, has an exhaust port 35 on one side, and contains the float 32, the swing lever 33 and the second elastic member 34 sleeved on the swing lever inside. The float 32 is placed inside the casing and senses the gas accumulation state through buoyancy.

[0056] When the pipeline is filled with liquid, the float 32 is lifted by buoyancy, which drives the swing lever 33 connected thereto to move upward, and the swing lever 33 blocks the exhaust port 35 at the top. In this process, the restoring force of the second elastic member 34 assists the swing lever 33 to return to the sealing position. When gas enters the exhaust casing 31, the float 32 sinks due to the loss of buoyancy, and at the same time, the gas pressure pushes the swing lever 33 to compress the second elastic member 34 downward, so that the swing lever 33 is separated from the exhaust port 35, and the gas is discharged through the exhaust port; after the gas is discharged, the liquid flows back to make the float 32 float again, and the swing lever 33 is reset under the action of buoyancy and the second elastic member 34, and the exhaust port 35 is resealed, realizing the cycle control of automatic exhaust and sealing.

[0057] In addition, the top of the exhaust casing 31 is provided with a gland 37.

[0058] In specific embodiments, the exhaust casing 31 comprises a first casing 311, a second casing 312 and a connecting member 313, the first casing 311 and the second casing 312 are arranged opposite to each other, the connecting member 313 is sleeved on the first casing 311 and the second casing 312, and one end of the connecting member 313 acts on the first casing 311 and the other end acts on the second casing 312. The connecting member 313 is a live joint.

[0059] The exhaust shell 31 is designed in a split type with the first shell 311 and the second shell 312, and is fixed by a joint connector 313. The two-section structure is first reflected in the convenience of assembly. When assembling the float 32, the swing rod 33 and the second elastic member 34, the first shell 311 and the second shell 312 can be separated, and the components can be pre-assembled in any shell. Then the two shells are quickly connected through the joint, avoiding the difficulty in installing the integrated shell due to the limited internal space. Secondly, the joint allows the first shell 311 and the second shell 312 to rotate relative to the axis, so as to flexibly adjust the circumferential angle of the exhaust port 35. For example, when the exhaust port 35 is oriented to interfere with other equipment components, the connector 313 is loosened and the shell is rotated to the target angle and then locked again. In this way, the layout requirements of different customers can be met without changing the overall installation position, which significantly improves the versatility of the structure design.

[0060] In specific embodiments, the first connecting port of the valve body 1 is connected to the pipeline through a joint 4.

[0061] The joint 4 allows axial rotation adjustment between the valve body 1 and the pipeline, so that the connection can be quickly completed and the layout deviation of the pipeline can be adapted without strict alignment of threads or fixed angles. When the valve body is maintained or replaced, the joint 4 can be easily disassembled, avoiding cutting the pipeline or damaging the original structure, which significantly reduces the disassembly cost. In addition, the sealing structure (such as rubber gasket or compression seal) of the joint can still maintain reliable sealing during adjustment, reducing the risk of leakage caused by repeated adjustment.

[0062] In specific embodiments, a filter screen is provided at the first connecting port; and / or a pressure sensor is provided at the first connecting port; and / or a pressure switch is provided at the first connecting port.

[0063] The filter screen at the first connecting port is located at the connection inlet of the pipeline and the valve body 1. Its function is to intercept impurities (such as sand and debris) in the fluid through the mesh structure, prevent foreign matter from entering the valve body to cause blockage or wear of the pressure relief assembly 2 or the exhaust assembly 3, and ensure the stability of the system operation. The pressure sensor is integrated into the inner wall or adjacent area of the first connecting port, which is used to monitor the pressure value in the pipeline in real time, and convert the data into an electrical signal to transmit to the external control system, to realize dynamic monitoring and early warning of the pressure state. The pressure switch is also provided near the first connecting port, which controls the on-off of the circuit by presetting the pressure threshold (such as the maximum safe pressure). When the detected pressure exceeds the set value, the power is automatically cut off or other equipment is linked (such as the water pump is turned off), so as to quickly cut off the pressure source or start the protection mechanism to avoid the risk of system overpressure. The three complement each other in function, and improve the reliability and safety of the system from the three dimensions of physical protection, real-time monitoring and active control.

[0064] The exhaust pressure relief structure provided by the embodiment has both exhaust and pressure relief functions. When gas is mixed in the water pipeline, the structure can effectively exhaust the gas. When the water pressure suddenly rises above a predetermined pressure value, the structure can drain water and relieve pressure, reducing the water pressure below the predetermined pressure value. When gas is mixed in the water pipeline and the pressure rises above the predetermined value, the structure can simultaneously and efficiently exhaust the gas and drain the water. The exhaust pressure relief structure provided by the embodiment has both exhaust and pressure relief functions, but only has one threaded connection point, so that the assembly is efficient and fast, and the processing cost is lower. In addition, because there is only one threaded connection point, the risk of water leakage is lower, and the quality is more reliable.

[0065] In addition, in other embodiments, a sealing cap 36 can also be arranged at the exhaust port 35. When the structure is assembled in the water pipeline, if some special situation occurs, and the user wants to seal the entire water pipeline, the sealing cap can be tightened to place the entire system in a closed state.

[0066] In summary, those skilled in the art can easily understand that the above advantageous technical features can be freely combined and superimposed without conflict.

[0067] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. An exhaust pressure relief structure, characterized by, The exhaust pressure relief structure comprises a valve body, a pressure relief assembly and an exhaust assembly, the valve body has a first connecting port, a second connecting port and a third connecting port, the first connecting port, the second connecting port and the third connecting port are communicated inside the valve body, the valve body is connected with a pipeline through the first connecting port, the pressure relief assembly is connected with the second connecting port, and the exhaust assembly is connected with the third connecting port.

2. The exhaust pressure relief structure according to claim 1, characterized by, The pressure relief assembly comprises a blocking unit and a first elastic member, one end of the blocking unit is directed to the second connecting port, and the first elastic member is located at the other end of the blocking unit; under the action of water pressure in the pipeline, the first elastic member has a first state of moving the blocking unit away from the second connecting port and a second state of tightly matching the blocking unit with the second connecting port.

3. The exhaust pressure relief structure according to claim 2, characterized by, The pressure relief assembly further comprises a pressure relief shell, and a drain port is formed in the pressure relief shell; when the first elastic member is in the first state, the second connecting port is communicated with the drain port.

4. The exhaust pressure relief structure according to claim 2, characterized by, The blocking unit comprises a rubber block with one end being open, the closed end of the rubber block is directed to the second connecting port, a pressing rod is arranged in the open end of the rubber block, and the first elastic member is sleeved on the pressing rod.

5. The exhaust pressure relief structure according to claim 4, characterized by, The pressure relief assembly further comprises a positive pressure relief unit, and an output end of the positive pressure relief unit acts on the pressing rod, and the positive pressure relief unit can lift the rubber block through the pressing rod.

6. The exhaust pressure relief structure according to claim 5, characterized by, The positive pressure relief unit comprises a handle, a three-jaw chuck and a clamping piece, an input end of the three-jaw chuck is connected with the handle, an output end of the three-jaw chuck acts on the pressing rod, and the clamping piece is connected with the three-jaw chuck; the handle drives the three-jaw chuck to rotate, so that the three-jaw chuck is located at a first position or a second position of the clamping piece, wherein the pressing rod has different heights corresponding to the first position and the second position.

7. The exhaust pressure relief structure according to claim 6, characterized by, The clamping piece has grooves arranged at intervals in the circumferential direction, and the groove bottoms of the grooves have slopes; when the three-jaw chuck is located at the first position with a lower slope, the rubber block blocks the second connecting port, and when the three-jaw chuck is located at the second position with a higher slope, the rubber block is lifted and releases the second connecting port.

8. The exhaust pressure relief structure according to claim 1, characterized by, The exhaust assembly comprises an exhaust shell, a float, a swing rod and a second elastic member arranged in the exhaust shell, one side of the exhaust shell has an exhaust port, the swing rod is inserted into the float, and the second elastic member is sleeved on the swing rod; under the action of buoyancy, the swing rod can block the exhaust port. Under the action of gas pressure and / or the second elastic member, the swing rod can move downward to release the exhaust port.

9. The exhaust pressure relief structure according to claim 8, characterized by, The exhaust shell comprises a first shell, a second shell and a connecting piece, the first shell and the second shell are arranged oppositely, the connecting piece is sleeved on the first shell and the second shell, one end of the connecting piece acts on the first shell, and the other end of the connecting piece acts on the second shell.

10. The exhaust pressure relief structure according to claim 1, characterized by, The first connecting port of the valve body is connected with the pipeline through a loose joint.

11. The exhaust pressure relief structure according to any one of claims 1 to 10, characterized by, The first connecting port is provided with a filter screen; and / or the first connecting port is provided with a pressure sensor; and / or the first connecting port is provided with a pressure switch. The first connecting port is provided with a filter screen; and / or the first connecting port is provided with a pressure sensor; and / or the first connecting port is provided with a pressure switch.

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