Full-pressure-difference combined type high-speed intake and exhaust valve

Abstract

The utility model relates to the technical field of valves, and particularly discloses a full-pressure-difference combined type high-speed air inlet and exhaust valve. The valve comprises a main valve body, an execution mechanism and an exhaust mechanism. The main valve body is provided with a valve cavity, two ends of the valve cavity are connected with a main pipeline, and a floating ball capable of moving up and down is arranged in the valve cavity. The executing mechanism is connected with a valve rod of the floating ball through the multifunctional opening and can drive the floating ball to move. And the interior of the actuating mechanism is divided into two membrane chambers by a membrane. The exhaust mechanism comprises a first exhaust mechanism and a second exhaust mechanism which are connected with the membrane chamber through exhaust pipelines. When the air pressure of the first membrane chamber is large, the valve rod is extruded towards one end of the second membrane chamber, and the floating ball is pushed to move towards one end far away from the multifunctional opening, so that the multifunctional opening is opened; when the air pressure of the second membrane chamber is large, the valve rod is squeezed towards one end of the first membrane chamber, the floating ball is pushed to move towards one end close to the multifunctional opening, and the multifunctional opening is closed. The device can efficiently work under different pressure differences.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve technical field especially relates to a full pressure difference composite high -speed air inlet exhaust valve. BACKGROUND

[0002] The air inlet exhaust valve is a kind of air inlet exhaust automatic control device for water supply and drainage pipeline, is the breather of pipeline, is the safety guarantee device of pipeline.In general, water contains 2% dissolved air, in the process of pipeline water delivery, these air is released from water constantly, accumulates at the high point of pipeline, forms air chamber, makes water delivery difficult, and the water delivery capacity of system thus drops 5% to 15%;The main function of air inlet exhaust valve is to remove these dissolved air, and when negative pressure occurs in pipeline, air inlet exhaust valve also has air inlet function, prevents the occurrence of pipeline rupture accident.This product is suitable for being installed in water supply pipe network, long-distance pipeline to protect pipeline or improve the water delivery efficiency of system, achieves the purpose of energy saving.

[0003] However, the composite air inlet exhaust valve in the prior art only relies on the float to inlet or exhaust air, and often causes valve seal failure due to float blockage or complex water flow state in the pipeline, a large amount of liquid in the pipeline is overflowed, causing water resource waste, and more seriously, it can cause damage to surrounding facilities.Or due to the reason of low temperature freezing, the float and valve seat are adhered, cannot inlet a large amount of air when pipeline negative pressure, cause pipeline rupture.At the same time, the composite air inlet exhaust valve of prior art can only remove the gas in the first stage empty pipe when the pipeline is filled with water, and the float is closed after the large float is lifted by water.Due to internal pressure, even if a large amount of gas exists in the pipeline at this time, the large float will not open again to exhaust air, and only a small amount of exhaust air can be carried out by relying on the trace exhaust valve, reducing the exhaust efficiency.

[0004] In the patent "intake and exhaust valve float ball and the formed intake and exhaust valve" (announcement number CN210978703U, hereinafter referred to as prior art 1) discloses an intake and exhaust valve, which is provided with an adjusting mechanism in the float ball shell in prior art 1. The adjusting mechanism is a piston-like mechanism or a balloon-like mechanism arranged in the inner cavity of the float ball shell, and the balloon-like mechanism can be arranged in the inner cavity of the float ball shell, or the balloon-like mechanism arranged in the inner cavity of the float ball shell, or the balloon-like mechanism arranged in the inner cavity of the float ball shell. In addition, the counterweight is preferably arranged at the bottom of the float ball shell, and the stability of the float ball is better. In addition, a plurality of auxiliary piston mechanisms around the piston cylinder outside can also be arranged in the float ball shell, which at least includes a piston cylinder, a piston, an inner air hole on the inner side of the piston and an outer air hole on the outer side of the piston. In the existing technical field, there is a method for adjusting the pressure change by a specific setting. This method can adapt to the change of pressure to a certain extent, so as to achieve a certain adjusting effect. However, the adaptation range of this technology is limited, it can only adjust in a certain, relatively narrow pressure range. Once it encounters more diversified or different air pressure conditions beyond this range, this technology is not up to the task, and cannot quickly respond and adapt. Practical new type content

[0005] Therefore, the full pressure difference composite high-speed intake and exhaust valve is provided, which solves the problem that the prior art cannot quickly and effectively realize the switching of intake and exhaust under different air pressure conditions.

[0006] The full pressure difference composite high-speed intake and exhaust valve is provided, which solves the problem that the prior art cannot quickly and effectively realize the switching of intake and exhaust under different air pressure conditions.

[0007] Preferably, the actuator is fixed to the bonnet of the main valve body by at least one pair of fasteners; and a mesh medium for isolating external contaminants is arranged between the actuator and the bonnet.

[0008] Preferably, the internal cavity of the actuator is further provided with an adjusting member for connecting the diaphragm and the valve stem; the second diaphragm chamber is further provided with a buffer groove; the buffer groove is internally provided with a buffer member sleeved on the valve stem; when the air pressure of the first diaphragm chamber is high, the diaphragm will press the adjusting member to one end of the second diaphragm chamber, driving the valve stem, thereby pushing the floating ball to move away from one end of the multifunctional port, so as to open the multifunctional port; when the air pressure of the second diaphragm chamber is high, the diaphragm will press the adjusting member to one end of the first diaphragm chamber, driving the valve stem, thereby pushing the floating ball to move close to one end of the multifunctional port, so as to close the multifunctional port.

[0009] Preferably, the top of the main valve body is provided with a first stop and a second stop in a stepped manner; the bonnet is connected to the main valve body through the first stop provided on the top of the main valve body; the valve cavity is internally provided with a protective member through the second stop; and the floating ball is arranged inside the protective member; wherein the outer circle of the floating ball cooperates with the inner circle of the protective member, and the floating ball can slide up and down in the inner circle of the protective member.

[0010] Preferably, the valve cavity is further provided with a second exhaust port, and the valve cavity is connected to a third exhaust mechanism through the second exhaust port; a drain valve is also arranged on the connecting pipeline of the second exhaust port and the third exhaust mechanism.

[0011] Preferably, the top of the floating ball is provided with a connecting seat, the valve stem is connected to the floating ball through the connecting seat; the connection between the valve stem and the floating ball is fastened by a compression nut; and the floating ball and the valve stem adopt a suspension joint.

[0012] Preferably, the bottom of the valve stem is provided with a limiting block; after the compression nut and the limiting block are sleeved on the valve stem, they are connected to the connecting seat through threads; a buffer pad is arranged between the valve stem and the top end of the floating ball; when the valve stem contacts the top of the floating ball, it plays a buffering role; when the multifunctional port is completely closed or completely opened, the limiting block does not contact the floating ball.

[0013] Preferably, when the main pipeline needs to discharge a large amount of gas, the gas enters the first diaphragm chamber through the first exhaust mechanism; after the air pressure overcomes the force of the buffer member, the valve stem moves away from the first diaphragm chamber, opening the multifunctional port and allowing the main valve body to discharge a large amount of gas; when the discharge of the main valve body is completed, the first exhaust mechanism is closed.

[0014] Preferably, when the main pipe is under negative pressure, the second exhaust mechanism starts to work, the one-way valve opens under the action of negative pressure, so that the second membrane chamber forms negative pressure and forms a pressure difference with the first membrane chamber, and after overcoming the force of the buffer, the valve stem moves away from the first membrane chamber, opens the multifunctional port, and makes the valve cavity and the atmosphere communicate, so that air can enter the main pipe through the valve cavity.

[0015] Preferably, the two ends of the actuator are respectively provided with a needle type vent valve; when the air in the valve cavity is less, the pressure of the main pipe does not enter the first membrane chamber, and the internal pressure is discharged through the needle type vent valve.

[0016] The full-pressure-difference composite high-speed air inlet and exhaust valve has the following beneficial effects:

[0017] The exhaust valve in the utility model adopts special ball float design and double membrane chamber structure, can effectively prevent ball instability and water leakage caused by turbulence, thereby improving the sealing performance and reliability of the system. And through the diaphragm structure and air pressure adjusting mechanism, the valve can maintain stable operation under full pressure difference, ensure the normal operation of air inlet and exhaust function, and avoid the occurrence of "air closing" phenomenon in traditional valves. Through the setting of two independent exhaust mechanisms and different exhaust pipelines, air can be quickly exhausted under different air pressure conditions, and the reaction speed and efficiency of the whole system are improved. The composite design makes the air inlet and exhaust valve adapt to more complex working environment, and can efficiently complete the air inlet and exhaust function under the condition of high pressure difference or low pressure difference. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments of the utility model will be simply introduced below, and for the ordinary skilled in the art, other drawings can also be obtained according of these drawings without creative labor, and these are within the protection scope of the utility model.

[0019] Figure 1 It is a structure schematic diagram of a full-pressure-difference composite high-speed air inlet and exhaust valve;

[0020] Figure 2 It is a control pipeline schematic diagram of a full-pressure-difference composite high-speed air inlet and exhaust valve;

[0021] Figure 3 It is an actuator and ball connection schematic diagram;

[0022] Figure 4 It is an assembly schematic diagram of a valve cover and main valve body;

[0023] Figure 5It is a valve cover structure diagram of a full differential pressure composite high-speed intake and exhaust valve;

[0024] Figure 6 It is a needle type vent valve structure diagram of a full differential pressure composite high-speed intake and exhaust valve;

[0025] Figure 7 It is a structure diagram of a pilot type exhaust valve;

[0026] Figure 8 It is a structure diagram of a micro exhaust valve;

[0027] Parts and numbers in the figure:

[0028] 100-main valve body, 110-valve cavity, 111-multifunctional port, 112-valve port, 113-floating ball, 114-connection seat, 115-pressing nut, 116-limiting block, 117-cushion pad, 118-first exhaust port, 119-second exhaust port, 120-exhaust pipeline, 121-drain valve, 130-valve cover, 131-valve seat, 132-sealing element, 133-mounting bolt, 141-first stop port, 142-second stop port, 143-protection element;

[0029] 211-main pipeline, 212-net-shaped medium;

[0030] 300-actuator, 310-valve rod, 320-diaphragm, 330-regulating element, 341-first membrane chamber, 342-second membrane chamber, 343-buffer groove, 344-buffering element, 345-fixing element, 346-needle type vent valve, 347-needle valve body, 348-sealing ring, 349-valve needle;

[0031] 410-first exhaust mechanism, 420-second exhaust mechanism, 421-one-way valve, 430-third exhaust mechanism;

[0032] 500-pilot type exhaust valve, 511-armature, 512-iron core winding, 513-first spring, 514-second spring, 515-plunger, 516-pilot hole, 517-septum, 518-valve body, 521-first air cavity, 522-second air cavity, 523-plunger cavity, 524-first membrane hole, 525-second membrane hole, 526-communication port;

[0033] 610-valve main body, 611-third air cavity, 612-inlet port, 613-outlet port, 614-elastic valve rod, 615-valve core, 616-valve pipe. DETAILED DESCRIPTION

[0034] For the purpose, technical scheme and advantages of the embodiments of the utility model, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. It should be noted that in this article, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. In the description of the utility model, it should be understood that the orientation or positional relationship indicated by terms such as center, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner and outer is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the utility model. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the elements. If not conflicting, the embodiments of the utility model and various features in the embodiments can be combined with each other, and are all within the protection scope of the utility model.

[0035] Embodiment 1

[0036] Please see Figure 1 The utility model embodiments provide a full pressure difference composite high speed air inlet and outlet valve, this air inlet and outlet valve mainly by main valve body 100, actuating mechanism 300 and exhaust mechanism three big parts constitute. In daily water conveying process, usually the water conveyed contains about 2% dissolved air. With the flow of water in the pipeline, the air dissolved in water will gradually release, and gather at the high point position of the pipeline system, form air cavity. The existence of these air cavities can significantly increase the difficulty of water conveying, cause the efficiency of the whole water conveying system to reduce, and the specific performance is that the water conveying capacity decreases, and the amplitude is about 5% to 15%. In order to solve this problem, the air inlet and outlet valve of the utility model is specially designed and installed at the high point position in the water conveying pipeline system. Its main function is to timely and effectively remove the air dissolved in water, thereby avoiding the formation of air cavity, guaranteeing the smoothness of the water conveying process. In addition, the air inlet and outlet valve also has an important auxiliary function, that is, when negative pressure occurs in the pipeline, the air inlet and outlet valve can be quickly opened, allowing external air to enter the pipeline to balance the pressure, preventing the pipeline from being broken due to excessive negative pressure.

[0037] Referring to Figure 1 In this embodiment, a full differential pressure composite high-speed air intake and exhaust valve is provided. The inside of the delivery main valve body 100 is provided with a valve cavity 110 structure for containing fluid. At both ends of the valve cavity 110, a plurality of multifunctional ports 111 and valve ports 112 are provided; the multifunctional ports 111 have the function of discharging air and fluid in the main pipeline 211, and at the same time it can also introduce air from the external environment when the main pipeline 211 is in a negative pressure state, to ensure the normal operation of the system. In addition, the valve ports 112 enable the main valve body 100 to be effectively connected with the main pipeline 211, ensuring the smooth operation and control of the entire system. In order to realize the control of the fluid inside the valve body, a floating ball 113 that can move up and down at least is also provided in the valve cavity 110, and the up and down movement of the floating ball 113 enables the multifunctional ports 111 to be opened or closed. The movement of the floating ball 113 is according to the change of fluid pressure. Through this setting, the full differential pressure composite high-speed air intake and exhaust valve can quickly respond to pressure changes during work, thereby realizing high-speed and precise air intake and exhaust control.

[0038] Referring to Figure 1 In this embodiment, a valve rod 310 connected with the floating ball 113 extends out of the actuator 300 through the multifunctional port 111. This valve rod 310 can effectively drive the floating ball 113 to move, to realize the function of opening or closing the multifunctional port 111. Inside the actuator 300, the internal cavity is divided into two independent membrane chambers, i.e. the first membrane chamber 341 and the second membrane chamber 342, by a diaphragm 320.

[0039] Referring to Figure 1 and Figure 2 The design of the exhaust mechanism includes two parts, i.e. the first exhaust mechanism 410 and the second exhaust mechanism 420. The two exhaust mechanisms are connected with the first membrane chamber 341 and the second membrane chamber 342 through different exhaust pipelines 120, so that different air intake and exhaust effects are produced by supplying air to different membrane chambers.

[0040] The first exhaust mechanism 410 is used when the main pipeline 211 needs to be operated with a large amount of exhaust, and it can effectively handle the gas accumulation in the main pipeline 211, ensuring the normal operation of the system. The second exhaust mechanism 420 is used when the system inside the main pipeline 211 produces negative pressure due to a large amount of water discharge or a sudden burst pipe event, and its role is to quickly supplement the pressure in the main pipeline 211, prevent further damage caused by negative pressure, and thus protect the safety and stability of the entire system.

[0041] Further referring to Figure 7The first exhaust mechanism 410 is arranged as a pilot exhaust mechanism, and a pilot exhaust valve is arranged on the pipeline, so that the valve cavity 110 can be preferentially entered from the first exhaust mechanism 410 at a specific time, thereby starting the first exhaust mechanism 410 to perform the exhaust operation.

[0042] Please refer to Figure 7 The pilot exhaust valve 500 comprises an armature 511, a core winding 512, a first spring 513, a second spring 514, a plunger 515, a pilot hole 516, a diaphragm 517, and a valve body 518. The valve body 518 is internally provided with cavities through which gas passes, including a first gas cavity 521, a plunger cavity 522, and a second gas cavity 523. The diaphragm 517 is arranged between the first gas cavity 521 and the second gas cavity 523, and a gap is arranged between the first gas cavity 521 and the plunger cavity 522 and communicates therebetween. The first spring 513 is arranged inside the plunger 515 to help the plunger 515 be at a preset position. The plunger cavity 522 communicates with the second gas cavity 523 through the pilot hole 516. The first gas cavity 521 functions to introduce gas, the second gas cavity 523 functions to exhaust gas, and the plunger cavity 522 functions to communicate the first gas cavity 521 and the second gas cavity 523 and enable the plunger 515 to move in the plunger cavity 522 after the armature 511 and the core winding 512 are started. The diaphragm 517 is respectively provided with a first membrane hole 524 and a second membrane hole 525 at two ends thereof. The second spring 514 connects the diaphragm 517 with the bottom of the first gas cavity 521 at two ends thereof and enables the diaphragm 517 to close the communication port 526 between the first gas cavity 521 and the second gas cavity 523.

[0043] When a large amount of gas enters, the gas first enters the first gas cavity 521, enters the other end of the first gas cavity 521 through the first membrane hole 524, and enters the plunger cavity 522 through the gap between the first gas cavity 521 and the plunger cavity 522, so that the plunger 515 overcomes the resistance of the first spring 513 and moves in the plunger cavity 522, so that the pilot hole 516 is completely opened. The gas enters the second gas cavity 523 through the second membrane hole 525, at this time, the pressure of the first gas cavity 521 is reduced, the pressure in the second gas cavity 523 is increased, the diaphragm 517 overcomes the resistance of the second spring 514, and the communication port 526 between the first gas cavity 521 and the second gas cavity 523 is opened, so that the gas can directly enter the second gas cavity 523 from the first gas cavity 521, and the gas introduction is completed. When the gas pressure in the main pipeline 211 is balanced or is small, the armature 511 and the core winding 512 stop working, so that the pilot hole 516 is closed, at this time, the pressure in the first gas cavity 521 is increased, the diaphragm 517 closes the communication port 526, and the pilot exhaust valve 500 stops working.

[0044] The working process of this pilot-operated exhaust valve 500 is generally divided into power-on state and power-off state:

[0045] In the de-energized state (initial state), when the pilot-operated exhaust valve 500 is de-energized (no current flows through the core winding 512), the first spring 513 is compressed, providing a restoring force that pushes the armature 511 and plunger 515 back to their original positions, normally closing the valve opening and preventing gas flow. At this point, the plunger 515 presses against the valve body 518, sealing the gas passage and placing the valve in a closed state.

[0046] Power-on status:

[0047] When current flows through the iron core winding 512, it generates a magnetic field. This magnetic field acts on the armature 511, attracting it toward the center of the iron core winding 512. This attraction causes the armature 511 to move the plunger 515 downward or upward, compressing the first spring 513 and opening the valve to allow gas to pass. The armature 511 and plunger 515 are connected by the first spring 513. The movement of the armature 511 pushes the plunger 515 to move accordingly, opening or closing the valve.

[0048] Recovery status:

[0049] When the current is disconnected, the magnetic field disappears, and the first spring 513 provides a restoring force, pushing the armature 511 and plunger 515 back to their original positions, and the valve closes again. Due to the action of the first spring 513, the armature 511 is pushed back to its original position, and the plunger 515 closes the valve port, blocking the gas passage and the valve closing again.

[0050] An exhaust pipe 120 is provided in the valve chamber 110 of the actuator 300 through the first exhaust port 118. A steam trap 121 is also installed on the exhaust pipe 120 to prevent liquid from entering during the exhaust process, thereby ensuring the normal operation of the exhaust mechanism.

[0051] When the amount of gas in main line 211 is excessive, it enters valve chamber 110 through valve port 112. The gas then passes through first exhaust port 118, through steam trap 121, and into first exhaust mechanism 410. Upon receiving the gas, first exhaust mechanism 410 drives valve stem 310, causing float 113 to move. The movement of float 113 causes multi-function port 111 to open, thereby exhausting the excess air. This entire process is automated, ensuring stable system operation and enabling timely processing of excess gas, avoiding potential safety risks.

[0052] In actual application, when the air pressure inside the first membrane chamber 341 reaches a higher level, this pressure will act on the valve stem 310, causing the valve stem 310 to move in the direction of the second membrane chamber 342 under the force, and then exert pressure on the floating ball 113. This pressure will make the floating ball 113 move in the direction away from the multifunctional port 111, thus causing the multifunctional port 111 to open, so that the gas can be discharged through the multifunctional port 111.

[0053] Conversely, when the air pressure inside the second membrane chamber 342 increases significantly, this increased pressure will act on the valve stem 310 in the opposite direction, pushing the valve stem 310 to move in the direction of the first membrane chamber 341. This movement will cause the floating ball 113 to be acted upon by the force, and then move in the direction close to the multifunctional port 111, ultimately causing the multifunctional port 111 to close. In this way, the flow of gas is blocked, thus achieving the purpose of controlling the pressure in the main pipe 211.

[0054] Referring to Figure 1 In this embodiment, the actuator 300 is firmly fixed to the valve cover 130 of the main valve body 100 by at least one pair of fixing members 345. The actuator 300 is installed at the top position of the main valve body 100, and a certain interval distance is maintained between the two. This design is to ensure that there is enough displacement space for the valve stem 310 when it is desired to open the multifunctional port 111. However, such a design also poses a potential risk that contaminants may enter the valve cavity 110 through this gap and contaminate the fluid inside the main pipe 211. In order to prevent this from happening, a mesh medium 212 that isolates external contaminants, i.e. a protective mesh, is provided. The protective mesh blocks and filters out contaminants that may enter the inside of the main valve body 100 through the gap, thereby protecting the fluid inside the main pipe from contamination and ensuring the clean and safe operation of the entire water delivery.

[0055] Referring to Figure 5 Further, the internal structure of the valve cover 130 includes a valve seat 131, and the valve seat 131 is provided with sealing members 132, which are formed by vulcanization process. During installation, the sealing members 132 on the valve seat 131 are fastened to the valve seat 131 itself through installation bolts 133, ensuring the firm combination between the sealing members 132 and the valve seat 131, and thus ensuring the sealing performance of the entire valve system.

[0056] Referring to Figure 1 and Figure 2In the inner cavity of the actuator 300, a regulating member 330 is provided to connect the diaphragm 320 and the valve stem 310, ensuring that they can work effectively together. In addition, a buffer groove 343 is provided in the second membrane chamber 342, which is designed to accommodate and fix a buffer member 344, which is usually a spring. The presence of the buffer groove 343 allows the spring to be sleeved on the valve stem 310 and to stretch and contract in the expected track, thereby providing the necessary support and buffering effect for the valve stem 310. When the valve stem 310 is not subjected to any external force, the presence of the spring ensures that the valve stem 310 can be stably maintained in the preset position, so that the float ball 113 can effectively close the multifunctional port 111. Only when the external applied pressure is large enough to overcome the resistance provided by the spring, the valve stem 310 will be driven to change the position of the float ball 113, allowing gas to pass through the multifunctional port 111. This design not only improves the response sensitivity of the actuator 300, but also enhances its stability and reliability under different working conditions.

[0057] In use, when the gas pressure in the first membrane chamber 341 is relatively high, the diaphragm 320 will be subjected to pressure from the first membrane chamber 341, thereby extruding the regulating member 330 in the direction of the second membrane chamber 342. This extrusion action will drive the valve stem 310 connected to the regulating member 330, overcoming the resistance exerted by the buffer member 344 opposite to the valve stem 310. With the movement of the valve stem 310, the float ball 113 connected to the valve stem 310 will also move accordingly, moving away from the multifunctional port 111. The result of this series of actions is that the originally closed multifunctional port 111 is opened, allowing gas or fluid to pass through.

[0058] Conversely, when the gas pressure in the second membrane chamber 342 is relatively high, the diaphragm 320 will be subjected to pressure in the opposite direction, thereby extruding the regulating member 330 in the direction of the first membrane chamber 341. Similarly, this extrusion action will drive the valve stem 310, and the movement of the valve stem 310 will push the float ball 113 to move towards the multifunctional port 111. This movement of the float ball 113 causes the multifunctional port 111 to close, preventing gas or fluid from passing through. The entire process is controlled by the displacement of the diaphragm 320 under different gas pressures to control the movement of the valve stem 310 and the float ball 113, thereby achieving precise control of the opening and closing of the multifunctional port 111.

[0059] Please refer to Figure 4In this embodiment, the top of the main valve body 100 is designed in a stepped manner, and the steps are set as two stops, i.e. a first stop 141 and a second stop 142. The main function of the two stops is to provide a guide during the installation of the valve cover 130 and the protective piece 143, ensuring that the installation components can be accurately combined with the main valve body 100. At the same time, the stops also undertake the support and support of the valve cover 130 and the protective piece 143 to ensure the stability and reliability after installation. After the first stop 141 is installed with the valve cover 130, it is compressed by bolts, and the protective piece 143 is also compressed with the main valve body 100 to fix the protective piece 143.

[0060] Further, the protective piece 143 is provided with a plurality of air and fluid through holes. In general use, both fluid and gas enter the valve cavity 110 from the valve port 112. When there is less gas, the fluid will lift the floating ball 113 by buoyancy and block the multifunctional port 111; when there is more gas in the fluid, the gas will float up, the fluid level will drop, and the position of the floating ball will also drop, and the gas will be discharged from the multifunctional port 111.

[0061] The connection between the valve cover 130 and the main valve body 100 is realized through the first stop 141 in the stepped structure at the top of the main valve body 100. This design not only ensures the close combination between the valve cover 130 and the main valve body 100, but also makes the installation process more convenient and accurate through the guiding effect of the stop.

[0062] Please refer to Figure 1 and Figure 3 In the valve cavity 110, a protective piece 143 is arranged through the second stop 142. The arrangement of this protective piece 143 is to protect the internal floating component (floating ball 113). The floating ball 113 is arranged to freely slide up and down inside the protective piece 143, and the outer circle is in sliding fit with the inner circle of the protective piece 143, which ensures smooth movement of the floating ball 113 during operation, and also prevents damage to the floating ball 113 under extreme working conditions, thereby improving the performance and life of the entire valve system.

[0063] Please refer to Figure 3In this embodiment, the upper end of the float ball 113 is provided with a connecting seat 114 for connecting the valve stem 310 with the float ball 113. To ensure the stability of the connection, the connecting part of the valve stem 310 and the float ball 113 is fastened by a compression nut 115. In addition, the connection between the float ball 113 and the valve stem 310 adopts a suspension joint technology, which not only ensures the flexibility of the connection, but also adapts to the needs of different working environments. The top end of the float ball 113 is firmly connected with the connecting seat 114 by welding, ensuring the stability and reliability of the overall structure.

[0064] Please refer to Figure 3 At the lower end of the valve stem 310, a limiting block 116 is provided, which functions to limit the movement range of the valve stem 310 under certain conditions. The compression nut 115 and the limiting block 116 are sleeved into the valve stem 310 and connected with the connecting seat 114 through threads, thereby ensuring the close combination between the limiting block 116 and the connecting seat 114. Between the valve stem 310 and the top end of the float ball 113, a buffer pad 117 is also provided, which mainly functions to buffer when the valve stem 310 contacts the top of the float ball 113, reducing the damage caused by direct collision. In addition, when the multifunctional port 111 is in a fully closed or fully open state, the limiting block 116 will not contact the float ball 113, thereby avoiding possible interference and ensuring the normal operation of the equipment.

[0065] In the case where the main pipeline 211 needs to be discharged in large quantities, and the fluid pressure is large enough to cause the liquid level to drop, the gas will first enter the first membrane chamber 341 through the first exhaust mechanism 410. When the gas pressure reaches a certain level, it is enough to overcome the force of the buffer 344, and the gas moves away from the first membrane chamber 341 through the valve stem 310, thereby opening the multifunctional port 111, so that the main valve body 100 can be discharged in large quantities. When the discharge in the main valve body 100 is completed, the first exhaust mechanism 410 is automatically closed, at this time the pipeline pressure does not enter the first membrane chamber 341, and the internal pressure is discharged through the needle type vent valve 346 in the following embodiment. Under the action of the buffer 344, the valve moves upward, driving the float ball 113 to float, and closing the multifunctional port 111.

[0066] When the negative pressure occurs in the main pipe 211, the first exhaust mechanism 410 is in the state of stopping operation, and the second exhaust mechanism 420 starts to work. Under the action of the negative pressure, the one-way valve 421 is opened, so that the second membrane chamber 342 forms a negative pressure state. At this time, a pressure difference is formed between the second membrane chamber 342 and the first membrane chamber 341, and the pressure difference is sufficient to overcome the force of the buffer 344, so that the valve rod 310 moves away from the first membrane chamber 341, thereby opening the multifunctional port 111. The multifunctional port 111 after being opened makes the valve cavity 110 communicate with the atmosphere, and air can smoothly pass through the valve cavity 110 into the main pipe 211, thereby balancing the negative pressure state in the main pipe 211.

[0067] Embodiment 2

[0068] Please see Figure 1 The utility model embodiment provides a full pressure difference composite high speed exhaust valve. The first exhaust and second exhaust mechanism 420 that can carry out a large amount of exhaust and negative pressure suction is provided in embodiment 1. But when the gas in the valve cavity 110 is less, it is also possible to exhaust through the main valve body 100, or a small amount of gas cannot be exhausted, which will also lead to the decline of water delivery capacity. Therefore, the third exhaust mechanism 430 is provided in the embodiment to exhaust a small amount of gas in the valve cavity 110.

[0069] In the embodiment, in addition to the original exhaust function, the second exhaust port 119 is additionally arranged in the structure design of the valve cavity 110. The second exhaust port 119 is connected with the third exhaust mechanism 430 to form an additional exhaust channel. In order to ensure that the exhaust efficiency is not affected by the condensation of water vapor during the exhaust process, the drain valve 121 is also arranged on the connecting pipeline. The third exhaust mechanism 430 is designed as a trace exhaust valve, which allows it to effectively exhaust when a small amount of gas accumulates in the main valve body 100. The design consideration is to reduce the frequent entry and exit of gas during the opening and closing of the main valve body 100, thereby reducing the wear and fatigue of the main valve body 100. In this way, the service life of the main valve body 100 can be significantly increased, and the stable operation of the whole system and the extension of the maintenance period can be ensured.

[0070] Further, please see Figure 8The micro exhaust valve comprises a valve body 610, a third air cavity 611, an air inlet 612, an air outlet 613, an elastic valve rod 614, a valve core 615 and a valve pipe 616. The third air cavity 611 is a cavity in the valve body 610, and gas enters the third air cavity 611 from the air inlet 612 at the bottom of the third air cavity 611 and is discharged from the air outlet at the top of the third air cavity 611. The air outlet 613 is provided with a rubber valve, which is elastic and can be attached to the inlet of the air outlet 613. When the valve pipe 616 is inserted into the air nozzle, the valve pipe 616 pushes open the rubber valve to form a channel to allow gas to be discharged from the third air cavity 611. When the valve pipe 616 is withdrawn, the rubber valve will rebound due to its elasticity and attach to the inlet of the air outlet 613 to seal the gas outlet channel. The air outlet 613 is in a normally closed state. An articulated elastic valve rod 614 is arranged on the lower side of the air outlet 613, one end of the elastic valve rod 614 is connected to the top of the third air cavity 611, the other end is fixedly connected with the valve core 615, and the elastic valve rod 611 is further provided with the valve pipe 616. When the elastic valve rod 614 is not subjected to external force, it is in a released state, and the valve core 615 blocks the air inlet 612. When gas enters the air inlet 612, the valve core 615 is lifted by the gas, the elastic valve rod 614 is in a contracted state, and the gas is stored in the third air cavity 611; when the gas in the third air cavity 611 is relatively large or reaches the valve pipe 616 of the elastic valve rod 614 and connects with the air outlet 613, the gas is discharged from the air outlet 613; when the elastic valve pipe 614 loses external force, it is in a released state, and the valve core 615 continues to block the air inlet 613.

[0071] Embodiment 3

[0072] See Figure 1 and Figure 6 The utility model embodiment provides a full pressure difference composite high speed exhaust and inlet valve. In embodiment 1, the first exhaust and second exhaust mechanism 420 can perform a large amount of exhaust and negative pressure suction.

[0073] However, in the process of performing the exhaust operation, the valve rod 310 will encounter resistance of the buffer 344, which can cause the moving speed to become slow, or in the case of high pressure, the moving speed can become too fast, so that effective adjustment cannot be performed.

[0074] In view of this, in the embodiment, a component capable of adjusting the up-down movement speed of the valve rod 310 in the actuating mechanism 300 is arranged.

[0075] In the embodiment, in order to realize the function, a needle type vent valve 346 is arranged at the upper and lower ends of the actuator 300 respectively; when the air quantity in the valve cavity 110 is reduced to a certain extent, the pressure of the main pipeline 211 will not enter the first membrane chamber 341, at this time the internal pressure can be discharged through the needle type vent valve 346.

[0076] The needle type vent valve 346 is composed of a needle valve body 347, a sealing ring 348 and a valve needle 349, wherein the upper end of the valve needle 349 is designed as an internal hexagonal groove structure, which allows the use of an internal hexagonal wrench for operation. By adjusting the opening of the valve needle 349, the speed of the up and down movement of the valve rod 310 of the actuator 300 can be effectively changed, and then the opening or closing speed of the composite intake and exhaust valve is controlled to achieve the expected adjustment effect.

[0077] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A full pressure differential composite high-speed intake and exhaust valve, comprising a main valve body (100), an actuator (300) and an exhaust mechanism; characterized in that: A valve cavity (110) is provided in the main valve body (100); multifunctional ports (111) and valve ports (112) are provided at both ends of the valve cavity (110); the main valve body (100) is connected to the main pipeline (211) through the valve port (112); a floating ball (113) that can at least move up and down is provided in the valve cavity (110); A valve stem (310) connected to the float (113) is provided in the actuator (300) through the multifunctional port (111), and the valve stem (310) can drive the float (113) to move; the actuator (300) divides the internal cavity into a first membrane chamber (341) and a second membrane chamber (342) through a diaphragm (320); the exhaust mechanism includes a first exhaust mechanism (410) and a second exhaust mechanism (420); the valve cavity (110) is provided with an exhaust pipe (120) through the first exhaust port (118), and a steam trap (121) is provided on the exhaust pipe (120); the first exhaust mechanism (410) and the second exhaust mechanism (420) are respectively connected to the first membrane chamber (341) and the second membrane chamber (342) through different exhaust pipes (120); When the air pressure in the first membrane chamber (341) is high, the valve stem (310) is squeezed toward one end of the second membrane chamber (342), pushing the float (113) to move toward the end away from the multifunctional port (111), so that the multifunctional port (111) is opened; when the air pressure in the second membrane chamber (342) is high, the valve stem (310) is squeezed toward one end of the first membrane chamber (341), pushing the float (113) to move toward the end close to the multifunctional port (111), so that the multifunctional port (111) is closed.

2. A full pressure differential compound high-speed intake and exhaust valve according to claim 1, characterized in that: The actuator (300) is fixed to the valve cover (130) of the main valve body (100) via at least one pair of fixing members (345); and a mesh medium (212) is provided between the actuator (300) and the valve cover (130) to isolate external pollutants.

3. A full pressure differential compound high-speed intake and exhaust valve according to any one of claims 1-2, characterized in that: The internal cavity of the actuator (300) is further provided with an adjusting member (330) for connecting the diaphragm (320) and the valve stem (310); a buffer groove (343) is further provided in the second diaphragm chamber (342); a buffer member (344) sleeved on the valve stem (310) is provided inside the buffer groove (343); When the air pressure in the first membrane chamber (341) is high, the membrane (320) presses the regulating member (330) toward one end of the second membrane chamber (342), driving the valve stem (310), thereby pushing the float (113) toward the end away from the multifunctional port (111), thereby opening the multifunctional port (111); When the air pressure in the second membrane chamber (342) is high, the membrane (320) squeezes the regulating member (330) toward one end of the first membrane chamber (341), driving the valve stem (310), thereby pushing the float (113) toward one end close to the multifunctional port (111), thereby closing the multifunctional port (111).

4. A full pressure differential compound high-speed intake and exhaust valve according to claim 2, characterized in that: The top of the main valve body (100) is provided with a first stop (141) and a second stop (142) in a stepped manner; The valve cover (130) is engaged with the main valve body (100) through a first stop (141) provided on the top of the main valve body (100); A protective member (143) is provided inside the valve cavity (110) through the second stop (142), and the float (113) is provided inside the protective member (143); The outer circle of the floating ball (113) matches the inner circle of the protective member (143), and the floating ball (113) can slide up and down in the inner circle of the protective member (143).

5. The full pressure differential compound high-speed intake and exhaust valve according to claim 1, characterized in that: The valve chamber (110) is further provided with a second exhaust port (119), and the valve chamber (110) is connected to a third exhaust mechanism (430) via the second exhaust port (119); a drain valve (121) is also provided on the connecting pipe between the second exhaust port (119) and the third exhaust mechanism (430).

6. The full pressure differential compound high-speed intake and exhaust valve according to claim 3, characterized in that: A connecting seat (114) is provided on the top of the float (113), and the valve stem (310) is connected to the float (113) via the connecting seat (114); the connection between the valve stem (310) and the float (113) is fastened via a compression nut (115); and a hanging joint is adopted between the float (113) and the valve stem (310).

7. The full pressure differential compound high-speed intake and exhaust valve according to claim 6, characterized in that: A limit block (116) is provided at the bottom of the valve stem (310); after the compression nut (115) and the limit block (116) are inserted into the valve stem (310), they are connected to the connecting seat (114) through threads, and a buffer pad (117) is provided between the valve stem (310) and the top of the float (113); when the valve stem (310) contacts the top of the float (113), it plays a buffering role; when the multi-function port (111) is fully closed or fully opened, there is no contact between the limit block (116) and the float (113).

8. The full pressure differential compound high-speed intake and exhaust valve according to claim 3, characterized in that: When the main line (211) needs to exhaust a large amount of gas, the gas enters the first membrane chamber (341) through the first exhaust mechanism (410). After the gas pressure overcomes the force of the buffer member (344), the gas moves away from the first membrane chamber (341) through the valve stem (310), opens the multi-function port (111), and exhausts a large amount of gas from the main valve body (100); when the exhaust in the main valve body (100) is completed, the first exhaust mechanism (410) is closed.

9. The full pressure differential compound high-speed intake and exhaust valve according to claim 6, characterized in that: When the main line (211) is under negative pressure, the second exhaust mechanism (420) starts to work, and the one-way valve (421) of the second exhaust mechanism (420) opens under the action of the negative pressure, so that the second membrane chamber (342) forms a negative pressure and forms a pressure difference with the first membrane chamber (341). After overcoming the force of the buffer member (344), the valve stem (310) moves away from the first membrane chamber (341), opens the multifunctional port (111), and connects the valve cavity (110) to the atmosphere, so that air can enter the main line (211) through the valve cavity (110).

10. The full pressure differential compound high-speed intake and exhaust valve according to claim 6, characterized in that: A needle-type vent valve (346) is provided at each end of the actuator (300); when there is less air in the valve chamber (110), the pressure of the main line (211) does not enter the first membrane chamber (341), and the internal pressure is discharged through the needle-type vent valve (346).

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