An exhaust valve

Abstract

The present invention provides an exhaust valve, which belongs to the field of valve technology. It solves the problem of inconvenient assembly of existing exhaust valves. The exhaust valve includes a valve body, a valve cover, a valve seat and a lever. The head end and tail end of the lever are respectively connected to a valve core and a float. The valve core is installed in the valve seat and the lever can drive the valve core to move. A cover plate is clamped and fixed between the valve body and the valve cover. The cover plate is provided with an exhaust hole that cooperates with the valve core. The lower surface of the cover plate is provided with protruding clamping feet and hinged ears on both sides of the exhaust hole. The valve seat is embedded between the clamping feet and clamped and fixed. A through slot is provided on the outer surface of the valve seat, and the upper side of the slot also penetrates the upper end surface of the valve seat upward. The head end of the lever passes through the slot and is hinged to the hinged ear. The upper end of the valve core passes through the lever to block the exhaust hole. The exhaust valve is stable in operation and easy to assemble.

Description

Technical Field

[0001] The invention belongs to the technical field of valves and relates to an exhaust valve. Background Art

[0002] A valve is a mechanical device with a movable mechanism used to control the flow of media within a pipeline. An exhaust valve is a type of valve, primarily installed in pipelines or equipment to release air. It is commonly used in heating systems, boilers, central air conditioners, and water heaters. Because water contains a certain amount of air, and its solubility decreases with increasing temperature, air gradually separates from the water as it flows through a pipeline, gathering to form large bubbles or even air columns. If this air is not promptly exhausted from the pipeline, the pressure within the pipeline will rise, compromising its safety.

[0003] Exhaust valves include automatic exhaust valves and manual exhaust valves, with automatic exhaust valves being the most widely used. For example, a Chinese patent document discloses an automatic exhaust valve [Application Number: CN201921582389.X, Publication Number: CN 210531726 U], which includes a valve body, a float, a lever, an elastic seal, and a valve cover. The valve body is a top-opening structure with an interface for connecting to a fluid pipeline at its bottom. The float is disposed within the valve body. One end of the lever is hinged to the float and the other end is connected to the elastic seal. The valve cover is disposed above the top opening of the valve body and has an air outlet formed on the valve cover. The elastic seal is disposed within the valve body and corresponds to the position below the air outlet. Under normal conditions, the elastic seal elastically rises and blocks the air outlet. When pressure within the valve body increases, the float floats downward, pulling the lever to cause the elastic seal to slide downward, opening the air outlet.

[0004] The exhaust valve is generally installed at the highest point of the pipeline. When there is air in the pipeline, the air enters the upper part of the valve body. The air in the upper part of the valve body presses down the liquid in the valve body, causing the liquid to drop. The drop of the liquid causes the float set in the valve body to drop as well. The drop of the float drives the elastic seal to drop through the lever, opening the air outlet and allowing the air to be discharged from the air outlet. After that, the air pressure in the upper part of the valve body drops, the liquid in the valve body rises, and the elastic seal elastically rises to block the air outlet. Among them, the elastic seal and the lever are both installed in the inner cavity of the valve body, and the valve body is often small in size and has limited installation and operation space. In addition, because the lever is above the float, the float needs to be hinged to the lever first, and then the float and lever are placed together in the valve body. The presence of the float will also interfere with the hinged operation of the lever and the valve body, making the installation of the elastic seal and the lever inconvenient. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose an exhaust valve, the technical problem to be solved is how to facilitate the assembly of the exhaust valve.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] 2. The unclamping method of claim 1, wherein the unclamping method is to make the unclamping method use the unclamping method to determine the valve size of the exhaust valve in an orderly manner. The unclamping method is to make the unclamping method use the unclamping method to determine the valve size of the exhaust valve in an orderly manner.

[0008] When the exhaust valve is installed in a pipeline, air in the pipeline accumulates in the valve body. The increased air pressure causes the liquid level in the valve body to drop. The lowering of the float causes the lever to rotate downward. The lever's head drives the valve core downward, opening the exhaust hole. The air is then discharged through the exhaust hole. The air pressure in the valve body drops, the liquid level rises, and the float rises. The lever rotates upward, and the valve core re-seals the exhaust hole, ending the exhaust. Air then continues to accumulate, and when the air pressure in the valve body increases, the exhaust hole opens again, achieving automatic exhaust.

[0009] When assembling the exhaust valve, you can first install the valve core into the valve seat, then insert the head end of the lever into the slot from the upper opening of the valve seat, pass the upper end of the valve core through the lever, and then insert the valve seat between the clamping feet to fix it, and then hinge the head end of the lever to the hinge ear, and then connect the float to the lever. After placing the float into the valve body, clamp the cover plate and fix it between the valve body and the valve cover.

[0010] The cover plate is independently provided, and the valve seat, lever, and valve core are all mounted on the cover plate. This allows the lever, valve core, and valve seat to be installed outside the valve body before being installed inside the valve body. The operating space for the valve seat, lever, and valve core during installation on the cover plate is unrestricted, and the float can be connected after the lever and cover plate are hinged. This also avoids interference from the float on the hinged lever, making assembly of the lever, valve core, and valve seat easy. The provision of the clamping pins allows the valve seat to be embedded between the clamping pins, thus completing the fixation to the cover plate and facilitating assembly. The provision of the hinged ears facilitates the hinged connection of the lever head end to the cover plate. The slot limits the lever, facilitating positioning during assembly. The upper end of the valve core passes through the lever, and the lever is used to position the valve core during assembly, making assembly of the valve core easy. Therefore, this exhaust valve is easy to assemble.

[0011] The clips clip onto both sides of the valve seat, facilitating assembly of the valve seat on the cover plate and ensuring stable positioning. The hinged lugs articulate the lever's two sides with the cover plate, ensuring uniform force distribution and stable rotation. The slots limit the lever's position, ensuring stable swinging within the valve seat after assembly, ensuring stable operation of the exhaust valve. The upper end of the valve core passes through the lever, guiding the movement of the valve core during operation and ensuring stable operation. Therefore, the interaction between the valve core, lever, valve core, and cover plate not only facilitates assembly of this exhaust valve, but also ensures stable operation.

[0012] In the above-mentioned exhaust valve, a snap-fit portion is provided on the side surface of the valve seat opposite to the clamping foot, and the clamping foot has a counter-locking portion corresponding to the snap-fit portion. The counter-locking portion is located below the snap-fit portion and rests on the snap-fit portion. The upper end surface of the valve seat rests on the lower surface of the cover plate, and the upper end surface of the snap-fit portion is tilted downward.

[0013] The abutment between the buckle portion and the bracket portion, as well as the abutment between the upper end surface of the valve seat and the lower surface of the cover plate, positions the valve seat vertically on the cover plate, thereby securing the valve seat on the cover plate and facilitating stable operation of the exhaust valve. When assembling the valve seat, the valve seat is inserted between the clamping pins from bottom to top. The upper end surface of the buckle portion is tilted downward, guiding the buckle portion as the valve seat is inserted between the clamping pins, facilitating the buckle portion to slide under the buckle portion and form abutment, thus facilitating easy assembly of the exhaust valve.

[0014] In the above-mentioned exhaust valve, a positioning groove is further provided on the side of the valve seat opposite to the clamping foot, the upper side of the positioning groove passes through the upper end surface of the valve seat, the clamping foot is embedded in the positioning groove, and the buckle part is provided on the lower side of the positioning groove.

[0015] When assembling the valve seat, insert it from the bottom up between the retaining pins, with the retaining pins inserted from the upper side of the locating groove. The locating groove guides the retaining pins during assembly, aligning the snap-fit portion with the bracket, facilitating easy assembly of the exhaust valve. After assembly, the locating groove prevents the valve seat from rotating and stabilizes it between the retaining pins, ensuring stable operation of the exhaust valve.

[0016] In the above-mentioned exhaust valve, a positioning hole is further provided on the lower surface of the cover plate, and a protruding positioning boss is provided on the upper end surface of the valve seat, and the positioning boss is embedded in the positioning hole.

[0017] When assembling the valve seat, the valve seat is inserted from bottom to top between the clamping feet, and the positioning boss is then inserted into the positioning hole, making assembly easy. The combination of the positioning hole and the positioning boss further circumferentially locates the valve seat, further preventing the valve seat from rotating and facilitating stable exhaust valve operation.

[0018] In the above-mentioned exhaust valve, a sliding hole is provided on the head end of the lever, and the sliding hole extends along the length direction of the lever to form a strip hole. The upper end of the valve core passes through the sliding hole, and a hinge hole is provided on the hinge ear. Both sides of the head end of the lever have hinge shafts corresponding to the hinge hole, and a notch is provided on the side of the hinge ear facing away from the clamping foot. The notch extends toward the hinge hole and passes through the hole wall of the hinge hole, and the hinge shaft can be embedded into the hinge hole from the notch.

[0019] When assembling the lever, first install the valve core into the valve seat, then embed the lever into the slot of the valve seat, and the upper end of the valve core passes through the sliding hole. At this time, the lever can move in the length direction because the sliding hole is a strip-shaped hole. Then the valve seat is clamped and fixed between the clamping feet. After that, move the lever so that the hinge shaft is embedded in the hinge hole through the notch. The lever and the hinge ear form a hinge, which makes the assembly operation convenient, making the exhaust valve easy to assemble.

[0020] In the aforementioned exhaust valve, a relief groove is defined on the side of the valve seat facing the hinge shaft, with a portion of the hinge shaft positioned within the relief groove. This relief groove prevents rotational interference between the hinge shaft and the valve seat, thus facilitating stable operation of the exhaust valve. Furthermore, the relief groove serves as a marker, preventing the valve seat from being installed in the wrong direction.

[0021] In the above exhaust valve, there is a gap between the lower end of the hinged ear and the clamping foot located on the same side of the exhaust hole.

[0022] The cover plate is generally made of plastic, and the clamping foot and the hinged ear have a certain degree of rigidity and elasticity. The setting of the gap facilitates the elastic deformation of the clamping foot during assembly to form a clamping connection with the valve seat, and facilitates the elastic deformation of the hinged ear to allow the hinge shaft to smoothly pass through the gap and embed into the hinged hole, which is conducive to convenient assembly of the exhaust valve.

[0023] In the exhaust valve, a reinforcement portion is integrally connected between the upper end of the hinged ear and the clamping foot located on the same side of the exhaust hole. The reinforcement portion has the function of increasing the structural strength, which is conducive to the stable operation of the exhaust valve.

[0024] In the above-mentioned exhaust valve, the valve core includes a rod-shaped core body and a spring, and a retaining ring is provided on the outer surface of the core body. The upper end of the core body passes through the sliding hole and is inserted into the exhaust hole. The retaining ring is located below the lever and stops on the lever, and the spring elastically rests on the lower end surface of the retaining ring.

[0025] When the lever is rotated downward, the core body can be driven downward by the retaining ring to open the exhaust hole. After the lever is rotated upward, the core body can be reset under the action of the spring to close the exhaust hole, which is conducive to the stable operation of the exhaust valve.

[0026] In the above-mentioned exhaust valve, a mounting groove is provided on the lower side of the slot, and a penetrating guide hole is provided on the bottom surface of the mounting groove. The lower end of the core body passes through the mounting groove and then enters the guide hole. The spring is installed in the mounting groove and the lower end of the spring rests on the bottom surface of the mounting groove.

[0027] The setting of the installation groove enables the valve core to be installed stably in the valve seat, and the guide hole has a guiding function, so that the core body can slide up and down stably.

[0028] In the exhaust valve, a sealing ring is fixed at the lower end of the exhaust hole, and the upper end of the core body has a conical sealing head, which abuts against the sealing ring and forms a seal. The cooperation between the sealing head and the sealing ring makes the exhaust hole sensitive to opening and closing.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] The valve seat is clipped and fixed between the cover plate's clip pins. The lever is inserted into the valve seat's slot and hinged to the cover plate's hinged lug. The valve core passes through the lever and is inserted into the exhaust hole. The interaction between the valve seat, lever, valve core, and cover plate ensures easy assembly and stable operation of the exhaust valve. The lever's sliding hole is a strip-shaped hole, and the hinged lug is notched, allowing the hinge shaft on the lever to fit through the notch into the hinge hole, facilitating assembly of the exhaust valve. The coordination between the positioning groove and the clip pins, as well as the snap and snap parts, ensures easy assembly and stable operation of the exhaust valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional diagram of the first embodiment of the exhaust valve;

[0032] Figure 2 is a cross-sectional view of the first embodiment of the exhaust valve;

[0033] Figure 3 yes Figure 2 A partial enlarged view of the upper part;

[0034] Figure 4 This is a three-dimensional diagram of the valve core, valve seat, lever, float and cover plate after assembly in Example 1 of the exhaust valve;

[0035] Figure 5 is a three-dimensional diagram of the valve seat in the first embodiment of the exhaust valve;

[0036] Figure 6 It is the three-dimensional structure of the cover plate in the first embodiment of the exhaust valve. Figure 1 ;

[0037] Figure 7 It is the three-dimensional structure of the cover plate in the first embodiment of the exhaust valve. Figure 2 ;

[0038] Figure 8It is the three-dimensional structure of the cover plate in the first embodiment of the exhaust valve. Figure 3 ;

[0039] Figure 9 is a three-dimensional diagram of the lever in the first embodiment of the exhaust valve;

[0040] Figure 10 It is a three-dimensional diagram of the float in the first embodiment of the exhaust valve.

[0041] In the figure, 1, valve body; 2, valve cover; 2a, exhaust channel; 3, valve seat; 3a, slot; 3b, buckle portion; 3c, positioning groove; 3d, positioning boss; 3e, avoidance groove; 3f, installation groove; 3g, guide hole; 4, lever; 4a, edge rib; 4b, sliding hole; 4c, hinge shaft; 4d, hanging rod; 4e, reinforcement rib; 4f, limit protrusion; 5, valve core; 5a, core body; 5a1, retaining ring; 5a2, sealing head; 5b , spring; 6, float; 7, cover plate; 7a, exhaust hole; 7b, card foot; 7b1, buckle part; 7b2, card slot; 7c, hinge ear; 7c1, hinge hole; 7c2, notch; 7d, reinforcement part; 7e, gap; 7f, positioning hole; 7g, give way groove; 7h, guide ring; 7k, guide plate; 7j, reinforcement plate; 8, partition; 9, positioning rod; 10, water flow body; 11, filter screen; 12, hook; 13, sealing ring. DETAILED DESCRIPTION

[0042] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0043] Example 1

[0044] like Figure 1-Figure 3 As shown, an exhaust valve includes a valve body 1, a valve cover 2, a valve seat 3, a lever 4, a valve core 5 and a float 6. The valve core 5 is installed in the valve seat 3 and the lever 4 can drive the valve core 5 to move. The lower end of the valve body 1 is the water inlet end, and a partition 8 is fixed in the water inlet end. The partition 8 is provided with several small water holes. The lever 4 and the float 6 are located in the valve body 1, and the float 6 is provided with a center hole. A positioning rod 9 is fixed on the partition 8, and the positioning rod 9 is inserted into the center hole. A water flow body 10 is also fixed on the water inlet end, and a filter screen 11 for generating microbubbles is installed in the water flow body 10. The water outlet connector and the water inlet connector of the water flow body 10 can be arranged perpendicular to each other or coaxially.

[0045] A cover plate 7 is clamped and fixed between the valve body 1 and the valve cover 2. The cover plate 7 is disc-shaped, with its outer edge clamped between the upper end of the valve body 1 and the lower end of the valve cover 2. The outer edge of the lower end of the valve cover 2 features a downwardly protruding connecting tube, which fits over the upper end of the valve body 1 and forms a threaded connection. A sealing gasket is fixed to the outer edge of the cover plate 7, which rests against the upper end of the valve body 1 to form a seal. An exhaust channel 2a is defined in the center of the valve cover 2, facilitating installation of the valve cover 2 and ensuring the exhaust valve's overall aesthetics.

[0046] The cover plate 7 is provided with a vent hole 7a that mates with the valve core 5 and communicates with the exhaust passage 2a. The valve seat 3 is separately fixed to the lower surface of the cover plate 7 and positioned below the vent hole 7a. A slot 3a extends through the outer surface of the valve seat 3, with the upper portion of the slot 3a extending upward through the upper end surface of the valve seat 3. The leading end of the lever 4 passes through the slot 3a and is hingedly connected to the cover plate 7. The upper end of the valve core 5 passes through the lever 4 and is inserted into the vent hole 7a. A hook 12 is fixed to the float 6, the upper end of which is hooked to the trailing end of the lever 4.

[0047] like Figure 4-Figure 7As described, the lower surface of the cover plate 7 is provided with protruding feet 7b and hinged ears 7c on either side of the vent 7a. These feet 7b and hinged ears 7c are integrally formed with the cover plate 7. The feet 7b and hinged ears 7c have a certain degree of rigidity and elastic deformation capability. The cover plate 7 is generally made of plastic. The two feet 7b are symmetrically arranged, and the two hinged ears 7c are symmetrically arranged. A reinforcement portion 7d is integrally connected between the upper ends of the hinged ears 7c and the feet 7b on the same side of the vent 7a. A gap 7e is defined between the lower ends of the hinged ears 7c and the feet 7b on the same side of the vent 7a. The valve seat 3 is inserted between the two feet 7b and secured in place. The valve seat 3 is rectangular and symmetrical. A step is provided on the side of the valve seat 3 opposite the feet 7b, with the step facing downward. This step reduces the material required for the valve seat 3 below the step and also acts as a reinforcing rib, thereby enhancing the structural strength of the valve seat 3. The side of the valve seat 3 opposite the foot 7b is provided with a latch portion 3b. The foot 7b has a corresponding latch portion 7b1, which is located below and abuts against the latch portion 3b. The upper end surface of the valve seat 3 abuts against the lower surface of the cover plate 7, and the upper end surface of the latch portion 3b is tilted downward. A positioning groove 3c is also provided on the side of the valve seat 3 opposite the foot 7b. The upper side of the positioning groove 3c extends through the upper end surface of the valve seat 3, and the foot 7b is embedded in the positioning groove 3c. The latch portion 3b is located below the lower side of the positioning groove 3c. The lower end surface of the latch portion 3b is flush with the stepped surface of the step, facilitating processing and forming. The opposing sides of the foot 7b are the inner sides of the foot 7b. The width of the foot 7b is the distance between the two side surfaces of the foot 7b opposite the two side surfaces of the positioning groove 3c. The width of the foot 7b gradually decreases from top to bottom. The lower end surface of the foot 7b is a convex arc-shaped cylindrical surface, and a chamfer is provided between the lower end surface of the foot 7b and the inner side surface of the foot 7b. This facilitates insertion of the foot 7b into the positioning groove 3c from the upper side of the positioning groove 3c and facilitates the passage of the interlocking portion 7b1 through the interlocking portion 3b. The inner side surface of the foot 7b has a slot 7b2 above the interlocking portion 7b1, and the interlocking portion 3b is located within the slot 7b2. The inner side surface of the upper end of the foot 7b has an upwardly inclined surface that extends to the lower surface of the cover plate 7. This inclined surface enhances the outward elastic deformation capability of the foot 7b, facilitating the insertion of the valve seat 3 between the two foot 7b. The lower surface of the cover plate 7 also has a positioning hole 7f. The upper end surface of the valve seat 3 has a protruding positioning boss 3d that engages with the positioning hole 7f. There are several positioning holes 7f arranged around the exhaust hole 7a, and there are several positioning bosses 3d, each corresponding to each positioning hole 7f. The upper ends of the positioning bosses 3d are conical, making it easier to insert the positioning bosses 3d into the positioning holes 7f. The number of positioning holes 7f is generally two, three, or four.

[0048] like Figure 3 、 Figure 4 and Figure 9 As shown, the lever 4 is flat and long, with raised edge ribs 4a on both sides of its upper surface. These ribs 4a enhance its structural strength and ensure stable operation. A sliding hole 4b is defined at the head end of the lever 4, extending along its length to form a strip-shaped hole. The upper end of the valve core 5 passes through the sliding hole 4b. A hinge lug 7c defines a hinge hole 7c1. A hinge shaft 4c corresponding to each hinge hole 7c1 is provided on either side of the head end of the lever 4. The hinge shafts 4c are rotatably inserted into the hinge holes 7c1. A notch 7c2 is defined on the side of the hinge lug 7c facing away from the foot 7b. The notch 7c2 extends toward and through the wall of the hinge hole 7c1, allowing the hinge shaft 4c to be inserted into the hinge hole 7c1 through the notch 7c2. The width of the notch 7c2 is the distance between its upper and lower sides. The upper side of the notch 7c2 is tilted upward, while the lower side is tilted downward, maximizing the width of the notch 7c2's entrance, facilitating the insertion of the hinge shaft 4c into the hinge hole 7c1 through the notch 7c2. A relief groove 3e is defined on the side of the valve seat 3 facing the hinge shaft 4c, with a portion of the hinge shaft 4c positioned within the relief groove 3e.

[0049] like Figure 3 As shown, the valve core 5 comprises a rod-shaped core 5a and a spring 5b. The outer surface of the core 5a includes a retaining ring 5a1. The upper end of the core 5a passes through the sliding hole 4b and is inserted into the exhaust hole 7a. The retaining ring 5a1 is located below the lever 4 and stops on the lever 4. The upper end of the spring 5b abuts the lower end of the retaining ring 5a1. The lower side of the slot 3a defines a mounting groove 3f. The bottom surface of the mounting groove 3f defines a through guide hole 3g. The lower end of the core 5a passes through the mounting groove 3f and enters the guide hole 3g. The spring 5b is mounted in the mounting groove 3f and the lower end of the spring 5b abuts the bottom surface of the mounting groove 3f. A sealing ring 13 is fixed to the lower end of the exhaust hole 7a. The upper end of the core 5a includes a conical sealing head 5a2, which abuts the sealing ring 13 to form a seal.

[0050] like Figure 4 、 Figure 9 and Figure 10 As shown, the tail end of the lever 4 has a hanging rod 4d, and both ends of the hanging rod 4d have limiting protrusions 4f, which protrude upwards. The upper end of the hook 12 is hooked on the hanging rod 4d and is located between the two limiting protrusions 4f. A hanging hole is provided at the tail end of the lever 4, and the hanging hole is close to the side wall of the tail end surface of the lever 4 to form a hanging rod 4d. The upper surface of the tail end of the lever 4 is also provided with a reinforcing rib 4e near the hanging hole, and the reinforcing rib 4e can improve the structural strength of the lever 4. The hook 12 is formed by bending a steel wire, and the upper end of the hook 12 is two R-shaped hook structures. The lower end of the hook 12 is inserted into the float 6 and fixed. As shown Figure 3 and Figure 4As shown, a clearance groove 7g is also provided on the lower surface of the cover plate 7, and the clearance groove 7g is opposite to the upper end of the hook 12. Figure 8 As shown, the upper surface of the cover plate 7 has a protruding guide ring 7h and several guide plates 7k. The exhaust hole 7a and guide plates 7k are located outside the guide ring 7h. The guide ring 7h is arranged around the exhaust channel 2a and has a guide notch adjacent to the exhaust hole 7a. The upper surface of the cover plate 7 also has a protruding boss. The upper end of the exhaust hole 7a extends through the upper end surface of the boss. An air outlet is formed on the side of the boss facing away from the guide notch and is connected to the exhaust hole 7a. Between the inner side of the guide ring 7h and the upper surface of the cover plate 7 are reinforcement plates 7j. There are several reinforcement plates 7j evenly spaced along the circumference. The guide ring 7h, guide plates 7k, and reinforcement plates 7j not only increase the structural strength of the cover plate 7 but also guide and mitigate the impact of gas discharged through the exhaust hole 7a, allowing the gas to be discharged smoothly from the exhaust channel 2a on the valve cover 2, ensuring stable operation of the exhaust valve.

[0051] When the exhaust valve is installed in a pipeline, air in the pipeline accumulates in the valve body 1. The increased air pressure causes the liquid level in the valve body 1 to drop. The float 6 descends, causing the lever 4 to rotate downward. The head end of the lever 4 abuts against the retaining ring 5a1 of the core 5a, causing the core 5a to move downward, opening the exhaust hole 7a. The air is then discharged through the exhaust hole 7a and the exhaust channel 2a. The air pressure in the valve body 1 decreases, the liquid level rises, and the float 6 rises. The lever 4 rotates upward. Under the action of the spring 5b, the sealing head 5a2 of the core 5a abuts against the sealing ring 13, forming a seal and completing the exhaust. The air then continues to accumulate, and when the air pressure in the valve body 1 increases, the exhaust hole 7a opens again, achieving automatic exhaust.

[0052] When assembling the exhaust valve, the core 5a and spring 5b can be installed into the mounting groove 3f of the valve seat 3 first, and then the head end of the lever 4 can be inserted into the slot 3a from the upper opening of the slot 3a. The upper end of the core 5a passes through the sliding hole 4b of the lever 4. Since the sliding hole 4b is a strip-shaped hole, the lever 4 can move along the length direction. Then, the valve seat 3 is inserted from bottom to top between the two clamping feet 7b, and the clamping feet 7b are inserted into the corresponding positioning grooves 3c. The positioning boss 3d is inserted into the positioning hole 7f, and the buckle portion 7b1 abuts against the lower end surface of the buckle portion 3b. The upper end surface of the valve seat 3 rests on the lower surface of the cover plate 7, and the valve seat 3 and the cover plate 7 are fixed. Then move the lever 4 so that the hinge shaft 4c is embedded in the hinge hole 7c1 from the notch 7c2, so that the head end of the lever 4 is hinged on the hinge ear 7c, and then hook the float 6 on the lever 4 through the hook 12. The float 6 is placed in the valve body 1, and the positioning rod 9 is inserted into the center hole of the float 6. Finally, place the cover plate 7 on the upper end surface of the valve body 1, and put the valve cover 2 on the upper end of the valve body 1 and tighten it so that the cover plate 7 is clamped and fixed between the valve body 1 and the valve cover 2.

[0053] Because the cover plate 7 is independently provided, and the valve seat 3, lever 4, and valve core 5 are all mounted on the cover plate 7, the lever 4, valve core 5, and valve seat 3 can be installed outside the valve body 1 before being installed inside the valve body 1. This allows for unrestricted access during installation of the valve seat 3, lever 4, and valve core 5 on the cover plate 7, facilitating assembly of the lever 4, valve core 5, and valve seat 3. Furthermore, the float 6 can be attached after the lever 4 and cover plate 7 are hinged, preventing interference from the float 6 during the hinged connection of the lever 4 and facilitating assembly of the lever 4, valve core 5, and valve seat 3. The slot 3a acts as a limiter for the lever 4, facilitating positioning during assembly and ensuring stable movement of the assembled lever 4 within the valve seat 3, ensuring stable operation of the exhaust valve. The strip-shaped sliding hole 4b on the lever 4 not only positions the valve core 5 but also provides mounting clearance for the lever 4 to be hinged to the hinge lug 7c. This also provides room for rotation of the lever 4, facilitating assembly of the lever 4 and ensuring stable operation of the lever 4 and valve core 5. The corresponding structure of the locking pin 7b and the valve seat 3 not only facilitates the installation and positioning of the valve seat 3, but also ensures a stable fixation. The float 6 can be hooked onto the lever 4 via the hook 12, making the connection convenient. Therefore, the interaction between the valve seat 3, lever 4, valve core 5, and cover plate 7 ensures stable operation and easy assembly of the exhaust valve.

[0054] Example 2

[0055] Hinge shaft 4c is not integrally formed with lever 4, and hinge lug 7c lacks notch 7c2. Instead, hinge shaft 4c is a pin that passes through the head end of lever 4, with both ends of the pin inserted into hinge lug 7c. The remaining structure is identical to that of Example 1. During installation, the pin is sequentially inserted into one hinge lug 7c, the head end of lever 4, and the other hinge lug 7c.

[0056] Example 3

[0057] The connection structure between the hook 12 and the lever 4 is different from that of the first embodiment, and the other structures are the same as those of the first embodiment. The tail end of the lever 4 has a protruding lug with a hanging hole, and the upper end of the hook 12 is hooked and hung in the hanging hole.

[0058] Example 4

[0059] A guide post protrudes from the upper end surface of the sealing head 5a2 of the core 5a. The guide post is inserted into the exhaust hole 7a to ensure stable upward and downward sliding of the core 5a. A clearance is provided between the outer side of the guide post and the wall of the exhaust hole 7a. The other structures are the same as those in the first embodiment.

[0060] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. An exhaust valve, comprising a valve body (1), a valve cover (2), a valve seat (3) and a lever (4), wherein the head end and the tail end of the lever (4) are respectively connected to a valve core (5) and a float (6), the valve core (5) is installed in the valve seat (3) and the lever (4) can drive the valve core (5) to move, characterized in that: A cover plate (7) is clamped and fixed between the valve body (1) and the valve cover (2), and an exhaust hole (7a) cooperating with the valve core (5) is provided on the cover plate (7), and a clamping foot (7b) and a hinged ear (7c) are protruded on both sides of the exhaust hole (7a) on the lower surface of the cover plate (7), and the valve seat (3) is embedded between the clamping feet (7b) and clamped and fixed. A through slot (3a) is provided on the outer side of the valve seat (3), and the upper side of the slot (3a) also penetrates the upper end surface of the valve seat (3) upwards. The head end of the rod (4) passes through the slot (3a) and is hinged to the hinge ear (7c). The upper end of the valve core (5) passes through the lever (4) and blocks the exhaust hole (7a). A buckle portion (3b) is provided on the side of the valve seat (3) opposite to the clamping foot (7b). The clamping foot (7b) has a buckle portion (7b1) corresponding to the buckle portion (3b). The buckle portion (7b1) is located below the buckle portion (3b) and abuts against the buckle portion (3b). The upper end surface of the valve seat (3) abuts against the lower surface of the cover plate (7).

2. The exhaust valve according to claim 1, characterized in that The upper end surface of the buckle portion (3b) is arranged to be tilted downward.

3. The exhaust valve according to claim 2, characterized in that A positioning groove (3c) is further provided on the side of the valve seat (3) opposite to the clamping foot (7b), the upper side of the positioning groove (3c) passes through the upper end surface of the valve seat (3), the clamping foot (7b) is embedded in the positioning groove (3c), and the buckle portion (3b) is provided on the lower side of the positioning groove (3c).

4. The exhaust valve according to claim 2, characterized in that A positioning hole (7f) is also provided on the lower surface of the cover plate (7), and a protruding positioning boss (3d) is provided on the upper end surface of the valve seat (3), and the positioning boss (3d) is embedded in the positioning hole (7f).

5. The exhaust valve according to any one of claims 1 to 4, characterized in that: A sliding hole (4b) is provided on the head end of the lever (4), and the sliding hole (4b) extends along the length direction of the lever (4) to form a strip-shaped hole. The upper end of the valve core (5) passes through the sliding hole (4b). A hinge hole (7c1) is provided on the hinge ear (7c). Both sides of the head end of the lever (4) respectively have hinge shafts (4c) corresponding to the hinge hole (7c1). A notch (7c2) is provided on the side of the hinge ear (7c) facing away from the clamping foot (7b). The notch (7c2) extends toward the hinge hole (7c1) and penetrates the hole wall of the hinge hole (7c1). The hinge shaft (4c) can be embedded into the hinge hole (7c1) through the notch (7c2).

6. The exhaust valve according to claim 5, characterized in that An avoidance groove (3e) is provided on the side of the valve seat (3) facing the hinge shaft (4c), and a part of the hinge shaft (4c) is located in the avoidance groove (3e).

7. The exhaust valve according to any one of claims 1 to 4, characterized in that: There is a gap (7e) between the lower end of the hinge ear (7c) and the clamping foot (7b) located on the same side of the exhaust hole (7a).

8. The exhaust valve according to any one of claims 1 to 4, characterized in that: A reinforcement portion (7d) is integrally connected between the upper end of the hinged ear (7c) and the clamping foot (7b) located on the same side of the exhaust hole (7a).

9. The exhaust valve according to claim 5, characterized in that The valve core (5) comprises a rod-shaped core body (5a) and a spring (5b). The outer surface of the core body (5a) is provided with a retaining ring (5a1). The upper end of the core body (5a) passes through the sliding hole (4b) and is inserted into the exhaust hole (7a). The retaining ring (5a1) is located below the lever (4) and stops at the lever (4). The spring (5b) elastically rests on the lower end surface of the retaining ring (5a1).

10. The exhaust valve according to claim 9, characterized in that A mounting groove (3f) is provided on the lower side of the slot (3a), a penetrating guide hole (3g) is provided on the bottom surface of the mounting groove (3f), the lower end of the core (5a) passes through the mounting groove (3f) and then into the guide hole (3g), the spring (5b) is installed in the mounting groove (3f) and the lower end of the spring (5b) rests on the bottom surface of the mounting groove (3f).

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