Combined type intake and exhaust valve

Abstract

The invention discloses a combined type air inlet and outlet valve, which relates to the technical field of air inlet and outlet valves, and comprises a valve body and a valve cover arranged at the upper part of the valve body, a floating ball is arranged in a floating ball cover, a sealing ring is arranged at the lower part of an air outlet, a clamping assembly connected with the floating ball cover is arranged outside the floating ball, and a box body with an open upper part is arranged below the floating ball cover. A one-way valve is arranged on the lower portion of the box body, a floating block is arranged in the box body, a fixing assembly used for fixing the clamping assembly is arranged on the floating block, a buffering anti-collision assembly is arranged on the fixing assembly, and a guiding anti-rotation assembly is arranged outside the floating ball. The air inlet and exhaust valve can prevent the floating ball from closing and sealing the exhaust port in the mass exhaust process, influence on mass exhaust work is avoided, influence on the closing function of the exhaust port due to normal floating of the floating ball under the action of water flow in the follow-up process is avoided, meanwhile, speed reduction can be achieved through triple buffering, and the service life of the exhaust port is prolonged. And impact damage to the floating ball and other related parts when the floating ball descends can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of intake and exhaust valves, and in particular to a composite intake and exhaust valve. Background Art

[0002] The composite inlet and exhaust valve is an inlet and exhaust control device dedicated to water supply and drainage pipes. It is widely used in pipe network systems of various water plants and various water supply fields. It is used to prevent the water output capacity of the pipeline from failing to meet the design requirements due to air blockage in the delivery pipeline, and the negative pressure in the pipeline from causing pipeline vibration or rupture. Since the inlet and exhaust valve is often installed at a higher position in the pipeline system, its purpose is to facilitate air intake and exhaust. In the field of traditional integral composite inlet and exhaust valves, it is divided into integral type and split type according to different structural forms. The traditional split-type inlet and exhaust valve includes a valve body of a vertical flow channel, a valve cover connected to the valve body, a float cover provided in the valve body, a float on the float cover, a sealing pair that cooperates with the float on the exhaust port of the valve cover, and a trace exhaust valve connected to the outside of the valve body;

[0003] When a large amount of air is generated in the pipeline, the air will continue to flow upwards. The inlet and exhaust valve is installed at the top of the pipeline and is in the open state. A large amount of air will blow into the bottom of the inlet and exhaust valve from the pipeline, pass through the inner cavity of the valve body, and be discharged to the outside from the exhaust port of the inlet and exhaust valve, thereby achieving the purpose of large-scale exhaust.

[0004] After a large amount of air in the pipeline is discharged through the above process, the water in the water pipe begins to enter the inlet and outlet valves, and the float will be floated up by the water entering and press against the sealing ring at the outlet of the exhaust port, thereby closing the outlet. In the normal water supply process, the air contained in the water accumulates at the top of the exhaust valve. As the air accumulates to a certain extent, it will be discharged to the outside by the trace exhaust valve, thereby achieving the purpose of trace exhaust.

[0005] When negative pressure is formed in the pipeline, the outside atmospheric pressure is greater than the air pressure in the pipe, so the exhaust port of the inlet and exhaust valve opens to take in air, thereby balancing the atmospheric pressure inside the pipe with that outside, to prevent the pipeline from becoming unstable and damaged due to negative pressure. At the same time, when the pipeline is emptied, it can automatically take in a large amount of air, which speeds up the drainage and shortens the water outage time.

[0006] A composite inlet and exhaust valve disclosed in a patent document with a prior art publication number of "CN 118030859 B" includes components such as an air valve housing, a filter device, a floating device, a sealing device, a buffer device, and a guide mechanism. Although the inlet and exhaust valve can adjust the buffering strength and achieve buffering treatment of airflows of different strengths within a certain range, thereby effectively improving the buffering and noise reduction treatment of the airflow by the buffer device, when the inlet and exhaust valve and the traditional inlet and exhaust valve exhaust a large amount of air through the exhaust port, due to the excessively fast speed of the airflow being discharged upward and the large impact force, the float ball may sometimes be blown upward and the exhaust port may be sealed and blocked, which will inevitably affect the large amount of exhaust work. In addition, in the process of exhausting air due to negative pressure in the valve body, the air flow velocity is also large in the initial stage of inward exhaust, and after acting on the falling float ball, the float ball impacts the float ball cover downward, and due to the large impact force, the float ball and the float ball cover and other components may be damaged, affecting the service life of the entire inlet and exhaust valve. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a compound intake and exhaust valve, which solves the problems raised in the background technology.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a compound intake and exhaust valve, comprising a valve body and a valve cover arranged on the upper part of the valve body, a float cover is arranged inside the valve body, a float is arranged inside the float cover, an exhaust port is opened on the valve cover, a sealing ring is arranged at the lower part of the exhaust port, a clamping assembly connected to the float cover is arranged on the outside of the float, a box body with an open upper part is arranged below the float cover, a one-way valve is arranged at the lower part of the box body, and a float is arranged in the box body, a fixing assembly for fixing the clamping assembly is arranged on the float block, a buffer and anti-collision assembly is arranged on the fixing assembly, the buffer and anti-collision assembly is located between the float and the float and connected to the float, and a guide anti-rotation assembly is arranged on the outside of the float.

[0011] Preferably, a through groove is provided on the outside of the float cover, and a connecting hole is provided on the lower part of the float cover. The connecting hole is rectangular and vertically penetrates the lower wall of the float cover. The clamping assembly and the fixing assembly are both vertically inserted into the interior of the connecting hole.

[0012] Preferably, the clamping assembly includes two elastic sheets and two clamping blocks, the two elastic sheets are symmetrically distributed and vertically penetrate the connecting hole, the upper ends of the two elastic sheets are fixedly connected to the float, the two clamping blocks are symmetrically fixed to the lower sides of the two elastic sheets, and the upper and lower parts of the clamping blocks are both inclined.

[0013] Preferably, the fixing assembly includes a bracket and a stopper, wherein the bracket is fixedly connected to the floating block and vertically penetrates and is inserted into the connecting hole, and the stopper is connected to the bracket and is located between two elastic sheets.

[0014] Preferably, the buffer and anti-collision component includes a connecting rod and a spring, the connecting rod is vertically inserted into the fixing component, and the spring is connected between the fixing component and the connecting rod.

[0015] Preferably, the buffer and anti-collision assembly also includes a sealing plate and a through hole opened on the floating block, the through hole vertically penetrates the floating block, and the number of through holes is several, and the sealing plate is connected to the lower part of the connecting rod and abuts against the lower end openings of the several through holes.

[0016] Preferably, the lower portion of the outer circumferential surface of the floating block is inclined and is provided with a side groove, and the side groove connects the upper surface and the lower surface of the floating block.

[0017] Preferably, the box body is in an inverted cone shape, and a gap is left between the upper opening of the box body and the lower surface of the float cover.

[0018] Preferably, the guide anti-rotation assembly includes a guide sleeve and a guide column, the guide column is a polygonal column and is fixedly connected to the float, a guide hole matching the guide column is opened inside the guide sleeve, the guide column slides through the guide hole, and the guide sleeve is fixedly connected to the valve cover.

[0019] Preferably, it also includes a bypass pipeline arranged outside the valve body and a filter screen cover arranged above the valve cover, a pressure cover is provided above the filter screen cover, a trace exhaust valve is provided on the bypass pipeline, the trace exhaust valve is connected to the interior of the valve body through the bypass pipeline, and a ball valve is provided on the bypass pipeline between the trace exhaust valve and the valve body.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a composite intake and exhaust valve, which has the following beneficial effects:

[0022] 1. During the process of large-scale exhaust, even when the air flow rate is too high, the cooperation between the connecting hole, the clamping assembly and the fixing assembly can limit the upward movement of the float, thereby preventing the float from continuing to move upward to the sealing ring at the bottom of the exhaust port, thereby preventing the float from closing and sealing the exhaust port, and further preventing the exhaust port from being closed by the float in advance during the process of large-scale exhaust, avoiding affecting the large-scale exhaust work, thereby ensuring that a large amount of gas can be smoothly discharged to the outside of the intake and exhaust valve, and ensuring the normal large-scale exhaust work and water flow delivery work, thereby improving the protection ability of the intake and exhaust valve to the delivery pipeline.

[0023] 2. When a large amount of water in the exhaust pipe flows into the inlet and exhaust valve after the exhaust is completed, the floating block and the fixed component can be used to release the restrictions of the clamping component and the connecting hole on the floating block, thereby achieving the purpose of automatically releasing the restrictions by relying on the water flow. Therefore, the subsequent normal floating of the float under the action of the water flow will not affect the closing function of the exhaust port, thereby ensuring the normal operation of the inlet and exhaust valve.

[0024] 3. In the process of extracting air through the exhaust port due to negative pressure in the conveying pipeline, the connecting holes, clamping components, fixing components, buffer and anti-collision components, and floating blocks will cooperate to achieve triple buffer deceleration, which can effectively reduce the descent speed of the float, thereby effectively reducing the impact force when the float descends, thereby protecting the float, the float cover and other related components to a certain extent, and avoiding impact damage to the float itself and other related components when the float descends to a certain extent, thereby ensuring the service life of the entire intake and exhaust valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the front view of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention;

[0027] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0028] Figure 4 This is a schematic diagram of the explosion three-dimensional structure of the floating ball cover of the present invention;

[0029] Figure 5 This is a schematic diagram of the cross-sectional structure of the floating ball cover of the present invention;

[0030] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0031] Figure 7 This is a schematic diagram of the front view of the three-dimensional structure of the floating block of the present invention;

[0032] Figure 8 It is a schematic diagram of the front cross-sectional structure of the floating block of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the floating block of the present invention when viewed from above.

[0034] In the figure: 1. valve body; 2. float cover; 201. through groove; 202. connecting hole; 3. float; 4. box body; 5. snap-on assembly; 501. elastic sheet; 502. clamping block; 6. fixing assembly; 601. bracket; 602. block; 7. buffer and anti-collision assembly; 701. connecting rod; 702. spring; 703. sealing plate; 8. guide anti-rotation assembly; 801. guide sleeve; 802. guide column; 9. one-way valve; 10. valve cover; 1001. exhaust port; 11. sealing ring; 12. filter screen cover; 13. pressure cover; 14. bypass line; 15. trace exhaust valve; 16. ball valve; 17. float; 1701. through hole; 1702. side groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] Example:

[0040] The present invention provides a composite intake and exhaust valve: Figure 1 and Figure 2 As shown, the valve body 1 and the valve cover 10 arranged on the upper part of the valve body 1, the interior of the valve body 1 is provided with a float cover 2, the interior of the float cover 2 is provided with a float 3, the valve cover 10 is provided with an exhaust port 1001, the exhaust port 1001 is used for large-scale exhaust work, the lower part of the exhaust port 1001 is provided with a sealing ring 11, the sealing ring 11 is used to cooperate with the float 3 to seal the exhaust port 1001, and also includes a bypass pipeline 14 installed on the outside of the valve body 1 and a filter screen cover 12 installed above the valve cover 10, the filter screen cover 12 is used to filter the external gas when the intake and exhaust valves are inlet and outlet, so as to prevent When external impurities enter the inlet and outlet valves, a gland 13 is installed above the filter screen cover 12, and a trace exhaust valve 15 is provided on the bypass line 14. The trace exhaust valve 15 is connected to the inside of the valve body 1 through the bypass line 14. After the float 3 seals the exhaust port 1001, the trace exhaust valve 15 can discharge the gas separated from the water to the outside, and a ball valve 16 is provided on the bypass line 14 between the trace exhaust valve 15 and the valve body 1. The ball valve 16 is used to open and close the bypass line 14, so that the trace exhaust valve 15 can be easily inspected after closing the bypass line 14;

[0041] like Figures 2 to 6 As shown, a clamping assembly 5 connected to the float cover 2 is provided on the outside of the float 3, and a guide anti-rotation assembly 8 is provided on the outside of the float 3;

[0042] A through groove 201 is provided on the outside of the float cover 2, which is used to connect the inner cavity of the float cover 2 with the inner cavity of the valve body 1, which is conducive to the flow of gas and water in the valve body 1, and a connecting hole 202 is provided at the lower part of the float cover 2. The connecting hole 202 is rectangular and vertically penetrates the lower wall of the float cover 2. The clamping assembly 5 and the fixing assembly 6 are both vertically penetrated and inserted into the interior of the connecting hole 202;

[0043] The clamping assembly 5 includes two elastic sheets 501 and two clamping blocks 502. The two elastic sheets 501 are symmetrically distributed and vertically penetrate the connecting hole 202. The upper ends of the two elastic sheets 501 are fixedly connected to the floating ball 3. The two clamping blocks 502 are symmetrically fixed to the lower sides of the two elastic sheets 501 respectively. The upper and lower parts of the clamping blocks 502 are both inclined. In the initial state, the distance between the outermost sides of the two elastic sheets 501 in the horizontal direction is smaller than the width of the connecting hole 202, and the clamping block 502 is located below the connecting hole 202, and the distance between the outermost sides of the two clamping blocks 502 in the horizontal direction is greater than the width of the connecting hole 202.

[0044] like Figures 4 to 7As shown, a box body 4 with an open top is provided below the float cover 2, and a one-way valve 9 is provided at the bottom of the box body 4. The drainage direction of the one-way valve 9 is from top to bottom, so when the water level in the valve body 1 drops, the one-way valve 9 can slowly discharge the water entering the box body 4 downward, and a floating block 17 is provided in the box body 4, and a fixing component 6 for fixing the clamping component 5 is provided on the floating block 17;

[0045] The fixing assembly 6 includes a bracket 601 and a stopper 602 . The bracket 601 is fixedly connected to the floating block 17 and vertically penetrates and is inserted into the connecting hole 202 . The stopper 602 is connected to the bracket 601 and is located between the two elastic sheets 501 .

[0046] Working principle: When the air inlet and outlet valve exhausts a large amount of air in the delivery pipeline, the air in the delivery pipeline will first enter the valve body 1 from the bottom, and part of the air will flow upward through the gap between the inner surface of the valve body 1 and the float cover 2, and another part of the air will enter the float cover 2 through the through groove 201, and flow upward through the gap between the inner surface of the float cover 2 and the float 3, and finally be discharged upward to the outside through the exhaust port 1001;

[0047] During the exhaust process, when the air velocity is too high, the air flowing into the float cover 2 will blow the float 3 upwards and make the float 3 move upwards. At the same time, the float 3 will also drive the elastic sheet 501 and the block 502 to move upwards synchronously. Since the opening of the box body 4 faces upwards and the one-way valve 9 has a backflow prevention function, the flowing air will not enter the box body 4, nor will it blow the float 17 upwards. Therefore, the bracket 601 and the block 602 installed on the float 17 will not move upwards. At this time, the block 602 is still at the connection hole 202.

[0048] In the above case, although the float 3 moves up, when the block 502 moves up to the lower edge of the connecting hole 202 along with the elastic sheet 501 and the float 3, since the width distance between the outermost sides of the two blocks 502 is greater than the width distance of the connecting hole 202, the connecting hole 202 will block the two blocks 502. At the same time, the block 602 located between the two elastic sheets 501 will also block the two elastic sheets 501 to prevent the two elastic sheets 501 from elastically bending inwardly, thereby preventing the block 502 from passing through the connecting hole 202 due to the inward bending of the elastic sheets 501. Therefore, when the float 3 is moved up by the airflow, the float 3 can be pulled under the blocking effect of the connecting hole 202 and the block 502, preventing the float 3 from continuing to move upward to the sealing ring 11 at the lower part of the exhaust port 1001, thereby preventing the exhaust port 1001 from being blocked and sealed, thereby ensuring the normal operation of a large amount of exhaust work.

[0049] After a large amount of gas is discharged, the water in the pipeline also starts to flow upward into the valve body 1, and flows into the float cover 2 through the through groove 201. At this time, the float 3 can float upward under the action of the buoyancy of the water flow, and drive the elastic sheet 501 and the block 502 to move upward. At the same time, the inflowing water will also flow into the box body 4 through the upper opening of the box body 4. The water entering the box body 4 can float the float 17 upward, and drive the bracket 601 and the block 602 to move upward and gradually away from the connecting hole 202.

[0050] When the block 502 moves up to the connection hole 202 with the float 3 and contacts the lower edge of the connection hole 202, since the block 602 has moved up and away from the connection hole 202 at this time, the block 602 will no longer block the position of the elastic sheet 501 close to the connection hole 202. Therefore, as the float 3 floats up, the float 3 will pull the elastic sheet 501 and the block 502 to move up, and under the pressure of the connection hole 202 on the block 502, the elastic sheet 501 undergoes elastic deformation to bend inward, so that the block 502 slides upward through the connection hole 202 with the float 3. Therefore, there is no blocking restriction of the connection hole 202 and the clamping assembly 5 on the float 3, so that the float 3 can continue to be floated upward by the upward water flow until it contacts the sealing ring 11, and the exhaust port 1001 can be closed.

[0051] Therefore, with the cooperation of the connecting hole 202, the clamping assembly 5, the float 17 and the fixing assembly 6, the float 3 can be restricted to a certain extent when a large amount of exhaust is discharged, thereby preventing the float 3 from being flushed upward by the large amount of exhaust airflow and causing the exhaust port 1001 to be closed. When the large amount of exhaust is completed and the water in the delivery pipeline flows into the inlet and exhaust valves, the restriction on the float 17 can be released by the float 17 and the fixing assembly 6. Therefore, the subsequent normal floating of the float 3 under the action of the water flow will not affect the closing function of the exhaust port 1001, thereby ensuring the normal operation of the inlet and exhaust valves.

[0052] like Figure 3 As shown, the guide anti-rotation assembly 8 includes a guide sleeve 801 and a guide column 802. The guide column 802 is a polygonal column and is fixedly connected to the float 3. A guide hole matching the guide column 802 is opened inside the guide sleeve 801. The guide column 802 slides through the guide hole, and the guide sleeve 801 is fixedly connected to the valve cover 10.

[0053] When the float 3 is floated upward by the water flow, the float 3 will also drive the guide column 802 to slide upward on the guide sleeve 801. During this process, the movement of the float 3 can be guided by the cooperation of the guide column 802 and the guide sleeve 801 to prevent the float 3 from being offset during the upward movement and causing a poor closure. Moreover, the guide holes of the guide column 802 and the guide sleeve 801 are both polygonal. Therefore, during the guiding process, the float 3 and the snap-on assembly 5 can be prevented from being deflected or offset when floating up or down, thereby ensuring the normal cooperation between the snap-on assembly 5, the fixing assembly 6 and the connecting hole 202.

[0054] like Figure 4 , Figure 5 as well as Figure 7 As shown, the box body 4 is an inverted cone, and a gap is left between the upper opening of the box body 4 and the lower surface of the float cover 2. The lower part of the outer circumferential surface of the float block 17 is an inclined surface and is provided with a side groove 1702. The side groove 1702 connects the upper surface and the lower surface of the float block 17. Therefore, when the water flow flowing into the intake and exhaust valve enters the box body 4, the water flow can flow into the lower position of the float block 17 more quickly through the side groove 1702, so that the float block 17 can float more easily, and thus the float block 17 can be floated upward more quickly, thereby improving the response speed of the fixed component 6, and then to a certain extent, improving the speed of releasing the restriction on the float ball 3, and ensuring the smoothness and reliability of the linkage between the various components and parts.

[0055] like Figure 4 and Figure 5 As shown, a buffer and anti-collision component 7 is provided on the fixing component 6, and the buffer and anti-collision component 7 is located between the floating ball 3 and the floating block 17 and is connected to the floating block 17;

[0056] like Figure 6 and Figure 7 As shown, the buffer and anti-collision assembly 7 includes a connecting rod 701 and a spring 702. The connecting rod 701 is inserted into the stopper 602 along the vertical direction, and the spring 702 is connected between the stopper 602 and the connecting rod 701.

[0057] like Figure 8 and Fig. 9 As shown, the buffer and anti-collision component 7 also includes a sealing plate 703 and a through hole 1701 opened on the floating block 17. The through hole 1701 vertically penetrates the floating block 17, and the number of through holes 1701 is several. The sealing plate 703 is connected to the lower part of the connecting rod 701 and abuts against the lower end openings of several through holes 1701.

[0058] Working principle: When negative pressure appears in the delivery pipeline, the water level in the float 3 and the inlet and outlet valves will drop because the outside atmospheric pressure is greater than the air pressure in the delivery pipeline. Therefore, the exhaust port 1001 on the valve cover 10 will open to intake air, thereby balancing the atmospheric pressure in the delivery pipeline with that outside. At the moment of intake, the air velocity flowing downward will also be relatively large, and the float 3 will drop rapidly by acting on it.

[0059] During the rapid descent of the above-mentioned float 3, since the speed of the one-way valve 9 to drain water downward is not as fast as the speed of the water level drop in the valve body 1, water is still stored in the box body 4, and therefore the float 17, the bracket 601 and the stopper 602 are still in a relatively high position, and the elastic sheet 501 and the block 502 will descend with the float 3, and the block 502 on the elastic sheet 501 will first contact the upper edge of the connecting hole 202. Since the stopper 602 is still in a high position above the connecting hole 202 at this time, it will not block the position of the elastic sheet 501 close to the connecting hole 202. Therefore, when the elastic sheet 501 and the clamping block 502 descend to that position, the elastic sheet 501 will be elastically deformed to bend inwards under the pressure of the connecting hole 202 on the clamping block 502, and then the floating ball 3 will continue to descend and the clamping block 502 can be pushed downward through the connecting hole 202 by the elastic sheet 501. In this process, the rebound force generated by the elastic deformation of the elastic sheet 501 and the upward friction force caused by the inner surface of the connecting hole 202 on the clamping block 502 will buffer the rapid downward movement of the floating ball 3 to a certain extent, thereby achieving the purpose of buffering and decelerating the rapid descent of the floating ball 3;

[0060] During the above-mentioned buffering and deceleration process, the descent of the float 3 will also press the upper end of the connecting rod 701 downward, thereby pressing the connecting rod 701 downward, so that the connecting rod 701 slides downward on the stopper 602. During this process, the connecting rod 701 and the stopper 602 can compress the spring 702 to a certain extent. The upward rebound force generated by the compression of the spring 702 can again buffer the rapidly descending float 3 to a certain extent, and can also achieve the purpose of buffering and decelerating the rapid descent of the float 3.

[0061] In addition, when the floating ball 3 presses the connecting rod 701 downward to slide downward, the buoyancy of the water retained in the box body 4 can make the floating block 17 descend less than the connecting rod 701. Therefore, the sliding connecting rod 701 can press the sealing plate 703 downward to separate the sealing plate 703 from the floating block 17, thereby opening the lower end opening of the through hole 1701. In this process, the squeezed spring 702 will also squeeze the stopper 602 downward, and the stopper 602 will then transmit the downward pressure from the spring 702 to the floating block 17 through the bracket 601. At this time, the upper and lower openings of the through hole 1701 on the floating block 17 are both open. State, at this time, when the float 17 is subjected to downward pressure, the water at the lower part can flow to the upper part of the float 17 through the through hole 1701, so the float 17 is easier to sink into the water retained in the box body 4 than in the initial state (the sealing plate 703 is against the lower end opening of the through hole 1701 in the initial state), and therefore the downward pressure from the spring 702 can push the float 17 downward and make the float 17 sink into the water in the box body 4. In this process, the water in the box body 4 will also exert an upward buoyancy on the float 17, and the buoyancy can also buffer the descending float 3 to a certain extent, and therefore can also achieve the purpose of buffering and decelerating the rapid descent of the float 3;

[0062] Through the above three buffer decelerations, the descending speed of the float 3 can be effectively reduced, so the impact force of the float 3 when it descends can be effectively reduced, and to a certain extent, the impact damage to the float 3 itself and other related parts when it descends can be avoided.

[0063] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite intake and exhaust valve, comprising a valve body (1) and a valve cover (10) arranged on the upper part of the valve body (1), a float cover (2) being arranged inside the valve body (1), a float (3) being arranged inside the float cover (2), an exhaust port (1001) being opened on the valve cover (10), a sealing ring (11) being arranged below the exhaust port (1001), characterized in that: The outside of the float (3) is provided with a clamping assembly (5) connected to the float cover (2); a box body (4) with an open top is provided below the float cover (2); a one-way valve (9) is provided at the bottom of the box body (4); a floating block (17) is provided inside the box body (4); a fixing assembly (6) for fixing the clamping assembly (5) is provided on the floating block (17); a buffering and anti-collision assembly (7) is provided on the fixing assembly (6); the buffering and anti-collision assembly (7) is located between the float (3) and the float (17) and is connected to the float (17); and a guiding and anti-rotation assembly (8) is provided outside the float (3).

2. A compound intake and exhaust valve according to claim 1, characterized in that: The outside of the float cover (2) is provided with a through groove (201), and the lower part of the float cover (2) is provided with a connecting hole (202), the connecting hole (202) is rectangular and vertically penetrates the lower wall of the float cover (2), and the clamping assembly (5) and the fixing assembly (6) are both vertically penetrated and inserted into the interior of the connecting hole (202).

3. A compound intake and exhaust valve according to claim 2, characterized in that: The clamping assembly (5) comprises two elastic sheets (501) and two clamping blocks (502); the two elastic sheets (501) are symmetrically distributed and vertically penetrate the connecting hole (202); the upper ends of the two elastic sheets (501) are fixedly connected to the floating ball (3); the two clamping blocks (502) are symmetrically fixed to the lower sides of the two elastic sheets (501), and the upper and lower parts of the clamping blocks (502) are both inclined.

4. A compound intake and exhaust valve according to claim 3, characterized in that: The fixing assembly (6) comprises a bracket (601) and a stopper (602); the bracket (601) is fixedly connected to the floating block (17) and vertically penetrates and is inserted into the connecting hole (202); the stopper (602) is connected to the bracket (601) and is located between the two elastic sheets (501).

5. A compound intake and exhaust valve according to claim 1, characterized in that: The buffer and anti-collision component (7) comprises a connecting rod (701) and a spring (702); the connecting rod (701) vertically penetrates and is inserted into the fixing component (6); and the spring (702) is connected between the fixing component (6) and the connecting rod (701).

6. A compound intake and exhaust valve according to claim 5, characterized in that: The buffer and anti-collision component (7) also includes a sealing plate (703) and a through hole (1701) opened on the floating block (17), wherein the through hole (1701) vertically penetrates the floating block (17), and the number of the through holes (1701) is several, and the sealing plate (703) is connected to the lower part of the connecting rod (701) and abuts against the lower end openings of the several through holes (1701).

7. A compound intake and exhaust valve according to claim 1, characterized in that: The lower part of the outer circular surface of the floating block (17) is inclined and is provided with a side groove (1702), and the side groove (1702) connects the upper surface and the lower surface of the floating block (17).

8. A compound intake and exhaust valve according to claim 1, characterized in that: The box body (4) is in an inverted cone shape, and a gap is left between the upper opening of the box body (4) and the lower surface of the floating ball cover (2).

9. A compound intake and exhaust valve according to claim 1, characterized in that: The guide anti-rotation assembly (8) comprises a guide sleeve (801) and a guide column (802); the guide column (802) is a polygonal column and is fixedly connected to the float (3); a guide hole matching the guide column (802) is provided inside the guide sleeve (801); the guide column (802) passes through and slides in the guide hole; and the guide sleeve (801) is fixedly connected to the valve cover (10).

10. A compound intake and exhaust valve according to claim 1, characterized in that: The invention also comprises a bypass pipeline (14) arranged outside the valve body (1) and a filter screen cover (12) arranged above the valve cover (10); a pressure cover (13) is arranged above the filter screen cover (12); a trace exhaust valve (15) is arranged on the bypass pipeline (14); the trace exhaust valve (15) is connected to the inside of the valve body (1) through the bypass pipeline (14); and a ball valve (16) is arranged on the bypass pipeline (14) between the trace exhaust valve (15) and the valve body (1).

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