Low-cost high-stability steam valve

Abstract

The low-cost and high-stability steam valve comprises a valve body, an air inlet part and an air outlet part are arranged in the valve body, a transition opening is formed between the air inlet part and the air outlet part, and a metal push rod is arranged in the transition opening in a penetrating mode; a first spring elastically abuts against the position between the end, close to the air inlet part, of the metal push rod and the valve body, and a first sealing ring is arranged on the metal push rod in a sleeving mode, located in the air inlet part and used for blocking the transition opening. The control switch pushes the metal push rod to move towards the air inlet part, the problem of thermal expansion and cold contraction can be avoided through the metal push rod, scraps can be avoided through the non-threaded switch mode, and due to the non-threaded connection mode, the valve body can be made of plastic parts through injection molding, so that the valve body is convenient to assemble and disassemble. And the control switch part can be injection-molded by using a plastic part, so that the cost can be greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coffee machine accessories, and in particular is a low-cost and high-stability steam valve. Background Art

[0002] With the rise of the coffee trend in China, the demand for coffee machines is also increasing. Commercial coffee machines or high-end coffee machines for personal use will have the function of outputting high-pressure steam and the effect of adjusting the amount of steam. Therefore, a steam valve with an adjustment function will be provided in the coffee machine. The steam valve currently used in coffee machines is shown in the technical solution in the public technical document "CN207544919U, a coffee machine steam valve". The adjustment method basically relies on threads. "The adjustment rod is provided with an external thread, and the steam valve body is provided with an internal thread. The adjustment rod and the steam valve body are connected to each other through the external thread and the internal thread." Hold the knob with your hand and then rotate it to make the adjustment rod leave the steam sealing ring, so that the water inlet and air inlet and the water outlet and air outlet are in a passage state.

[0003] There will be no problem when using this solution for the first time, but each rotation will cause wear on the thread. Frequent use will cause the threads to change and become loose, making it impossible to adjust accurately. Secondly, valves are basically made of metal. The friction between the rotating threads will produce metal debris, which can easily fall into the steam channel and be carried out together. If the product is exported abroad and ingested by people, it will be a major accident.

[0004] In addition, it can be seen from the above document that the figure marked 2 shows the steam input end. In the initial state, the steam input end is sealed by the sealing block 11 on the piston. The steam pressure of the sealing block 1 in this scheme is mutually opposed. However, when the threads in the control handle are worn and loose, they cannot provide locking force. This will cause the sealing block 11 to be unable to completely seal the steam input end, and then leakage problems will occur. Summary of the Invention

[0005] The object of the present invention is to provide a low-cost and high-stability steam valve to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A low-cost and high-stability steam valve comprises a valve body, wherein the valve body is provided with an air inlet portion and an air outlet portion, a transition opening is provided between the two portions, and a metal push rod is passed through the transition opening;

[0008] The first spring is elastically pressed against the valve body at one end of the metal push rod close to the air inlet, and a first sealing ring is sleeved on the metal push rod. The first sealing ring is located in the air inlet and is used to block the transition opening.

[0009] Control the switch and push the metal push rod toward the air intake.

[0010] According to a further technical solution, the valve body and the control switch are made by injection molding.

[0011] According to a further technical solution, the valve body is provided with a first limiting groove and a second limiting groove, which correspond to the two ends of the metal push rod respectively, so that they can be inserted therein, and one end of the metal push rod passes through the second limiting groove and extends to the control switch;

[0012] The metal push rod has one end close to the control switch, and a first sealing structure is provided between the metal push rod and the air outlet.

[0013] According to a further technical solution, the metal push rod is provided with a first protrusion and a second protrusion, a groove is formed between the two for fixing the first sealing ring, and the second protrusion can be placed in the air outlet portion and is provided with an adjusting cone surface.

[0014] According to a further technical solution, the control switch includes a main body, one end of which is fixedly provided with a handle, and the other end of which is provided with an adjustment inclined plane.

[0015] According to a further technical solution, a first groove and a second groove are respectively provided at both ends of the adjusting slope, and the ends of the metal push rod can be placed therein respectively.

[0016] According to a further technical solution, a limiting cavity is provided in the valve body, a movable block is provided in the limiting cavity, and a second spring is elastically supported between the movable block and the limiting cavity;

[0017] A third groove and a fourth groove are provided at one end of the main body close to the adjusting inclined surface. The main body is rotated so that the third groove and the fourth groove can correspond to the movable block respectively, and the movable block extends out and is inserted into the third groove and the fourth groove.

[0018] According to a further technical solution, the valve body includes a first shell and a second shell, which are detachably connected, the air inlet is located in the first shell, and the air outlet is located in the second shell.

[0019] According to a further technical solution, the first shell and the second shell are connected by threads or screws.

[0020] According to a further technical solution, a second sealing structure and a positioning structure are provided between the first shell and the second shell.

[0021] Beneficial effects of the present invention:

[0022] The present invention adopts a metal push rod to avoid the problem of thermal expansion and contraction. Secondly, it adopts a non-threaded switch method to avoid the generation of debris. Since a non-threaded connection method is adopted, the valve body can be injection molded by plastic parts, and the control switch part can also be injection molded by plastic parts, which can greatly reduce costs.

[0023] Even if the control switch is loose when the steam valve is in the closed state, there will be no leakage. It can continuously maintain a high and stable sealing performance, which is unmatched by current coffee steam valves.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : A three-dimensional structural diagram of the present invention.

[0026] Figure 2 : Disassembly diagram of the present invention.

[0027] Figure 3 : The second shell structure of the present invention Figure 1 .

[0028] Figure 4 : The second shell structure of the present invention Figure 2 .

[0029] Figure 5 : Cross-sectional closed structure diagram of the present invention.

[0030] Figure 6 : The cross-section of the present invention is opened structural diagram.

[0031] Figure 7 : Structural diagram of the control switch of the present invention.

[0032] Figure numerals: 1-valve body, 11-air inlet, 12-air outlet, 13-transition opening, 14-first limiting groove, 15-second limiting groove, 16-first shell, 17-second shell, 18-second sealing structure, 19-positioning structure, 21-metal push rod, 22-first spring, 23-first sealing ring, 24-first protrusion, 25-second protrusion, 26-adjusting cone, 27-sealing structure, 3-control switch, 31-main body, 32-handle, 33-adjusting inclined surface, 34-first groove, 35-second groove, 36-third groove, 37-fourth groove, 41-limiting cavity, 42-movable block, 43-second spring, 5-end cover. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] Please refer to Figure 1-7 ;

[0035] The steam valve of the present invention provides an adjustment method different from the prior art, which can maintain rotary adjustment without generating impurities such as metal chips, thus avoiding accidents, and has better sealing performance than the existing steam valves; specifically, it comprises a valve body 1, wherein the valve body 1 is provided with an air inlet portion 11 and an air outlet portion 12, and a transition opening 13 is provided between the two, wherein the air inlet portion 11 is used to connect with an air inlet pipe of steam, and the air outlet portion is used to connect with an external component or an air outlet pipe, the air inlet portion 11 forms a first cavity in the valve body 1, and the air outlet portion 12 forms a second cavity in the valve body 1, and the two cavities are connected through the transition opening 13, and a metal push rod 21 is passed through the transition opening 13, and an end of the metal push rod 21 close to the air inlet portion 11 is elastically pressed against a first spring 22 between the valve body 1, and a first sealing ring 23 is sleeved on the metal push rod 21, and the first sealing ring 23 is located on one side of the air inlet portion 11 and is used to block the transition opening 13;

[0036] It should be noted that even if the product has good quality, it will not have a market if the cost is high, which means that the product is a failure. In the existing coffee machine accessories market, prices are quite transparent, with a steam valve selling for around 3 yuan. Therefore, there is a market only if the product has good quality and low cost. Taking the public technical document "CN222026310U, Steam Valve Structure for Coffee Machine" as an example, referring to paragraphs 0023-0024 of its specification, we can know the relationship and specific principles between the movable parts and the rotating parts. Currently, the movable parts and the rotating parts are mostly made of plastic. However, in After the steam valve has been used repeatedly, the temperature inside the valve body 1 rises sharply. Thermal expansion and contraction will slightly increase the volume of the moving parts and rotating parts, squeezing the sealing ring and the threaded part, thus causing difficulty in rotation or abnormal noise. Assuming that the moving parts and rotating parts are made of metal, the external valve body 1 should also be made of metal. Due to the use of a threaded connection, metal chips will be generated after long-term use and will be output with the steam, which is harmful to human health. It is very dangerous, especially for the strict standards of overseas markets. Therefore, they need to be replaced regularly, but this will also increase the cost of use.

[0037] The metal push rod 21 of the present invention can avoid the problem of thermal expansion and contraction. Secondly, the non-threaded switch method can avoid the generation of debris. Due to the non-threaded connection method, the valve body 1 can be injection molded by plastic parts, and the control switch 3 can also be injection molded by plastic parts, which can greatly reduce costs.

[0038] In the initial state, the metal push rod 21 is pushed out toward the air outlet 12 under the action of the first spring 22, so that the first sealing ring 23 closes the transition opening 13. At this time, high-pressure steam cannot be input from the air inlet 11 to the air outlet 12. When it is needed, the control switch 3 is triggered to push the metal push rod 21 toward the air inlet 11, so that the first sealing ring 23 is separated from the transition opening 13, that is, the transition opening 13 is opened. At this time, high-pressure steam can enter the air outlet 12 from the transition opening 13 and be continuously output. After resetting the control switch 3, the metal push rod 21 is pushed out toward the air outlet 12 under the action of the first spring 22, so that the first sealing ring 23 closes the transition opening 13 here. At this time, high-pressure steam cannot be input from the air inlet 11 to the air outlet 12, that is, the steam valve is in a closed state.

[0039] In one embodiment, assuming that there is no high-pressure steam, the action of the first spring 22 pushes the metal push rod 21 out toward the air outlet 12, causing the first sealing ring 23 to close the transition opening 13. At this time, there is a small gap between the control switch 3 and the end of the metal push rod 21. It can be understood that the end of the metal push rod 21 does not contact the control switch 3 at this time, that is, in this state, the control switch 3 does not restrict the metal push rod 21. It should be noted that the user experience is also very important, mainly manifested in whether the control switch 3 is practical and convenient, that is, whether it is easy to push the metal push rod 21. Although a spring with a larger elastic force can improve the sealing, it requires a greater force to trigger the control switch 3. Therefore, using the special structure of the present application, when the air inlet 11 continues to pass high-pressure steam, the air inlet 11 maintains a high-pressure state. The resulting pressure will be applied to the surface of the first sealing ring 23, which is superimposed with the thrust of the first spring 22 to squeeze it, thereby improving the sealing. That is, the first spring 22 can be selected with a reduced elastic force, which can make it relatively easy to trigger the outlet control switch 3.

[0040] Of course, since the gap between the control switch 3 and the end of the metal push rod 21 is very small, after the high-pressure steam is continuously passed, if the first sealing ring 23 is squeezed and slightly deformed, the metal push rod 21 is pushed forward slightly, and the end of the metal push rod 21 can be brought into contact with the switch.

[0041] In other words, even if the control switch is loose when the steam valve is in the closed state, there will be no leakage. It can continue to maintain a high and stable sealing performance, which is unmatched by the current coffee steam valve.

[0042] In an embodiment of the present invention, a first limiting groove 14 and a second limiting groove 15 are provided in the valve body 1, which correspond to the two ends of the metal push rod 21 respectively, so that they are inserted therein respectively, and one end of the metal push rod 21 passes through the second limiting groove 15 and extends to the control switch 3. The moving position of the push rod is limited by the first limiting groove 14 and the second limiting groove 15, and one end of the metal push rod 21 close to the control switch 3 is provided with a first sealing structure 27 between the air outlet part 12, which can prevent high-pressure steam from leaking from the second limiting groove 15 and the metal push rod 21.

[0043] In addition, a first protrusion 24 and a second protrusion 25 are provided on the metal push rod 21, and a slot is formed between the two for fixing the first sealing ring 23. The second protrusion 25 can be placed in the air outlet portion 12 and is provided with an adjusting cone 26. It should be noted that the part of the air inlet portion 11 located in the valve body 1 is similar to a "channel", and the second protrusion 25 is placed in the "channel". The maximum outer diameter of the second protrusion 25 is smaller than the inner diameter of the "channel", and the function of the adjusting cone 26 is that when the metal push rod 21 is pushed toward the air inlet portion 11, the second protrusion 25 is gradually pushed out of the "channel" and moves to the air inlet portion 11. In this process, the gap component between the adjusting cone 26 and the transition opening 13 increases. This process can be used to adjust the air intake volume, allowing the user to select the amount of steam to be output.

[0044] The present invention relates to an embodiment of the control switch 3, in which one implementation method is that the control switch 3 can be a push-type, that is, the control switch 3 is equivalent to a button, and the metal push rod 21 is pushed by pressing. However, although the opening and closing functions can be realized, the moving position of the metal push rod 21 cannot be controlled more accurately, that is, it is difficult to adjust the amount of output steam, so it is still necessary to rely on a rotation type. Specifically, the control switch 3 includes a main body 31, and the main body 31 is rotatably connected to the valve body 1. A handle 32 is fixed at one end of the main body 31 and extends out of the valve body 1, and an adjustment bevel 33 is provided at the other end. Of course, the adjustment bevel 33 is distributed along the end surface of the main body 31; the adjustment bevel 33 is displaced by rotating the main body 31, and then the metal push rod 21 is pushed or an avoidance position is formed to allow the metal push rod 21 to extend, thereby realizing the switching function. In addition, a non-threaded rotation method is adopted, so no debris will be generated, which is safer.

[0045] The valve body 31 further includes an end cover 5 , which is sleeved on the main body 31 and fixedly connected to the valve body 1 .

[0046] Preferably, the two ends of the adjusting bevel 33 are respectively provided with a first groove 34 and a second groove 35, in which the ends of the metal push rod 21 can be placed respectively. The first groove 34 and the second groove 35 are arc surfaces, and the end of the metal push rod 21 is also an arc surface, so it will not get stuck and can be disengaged by rotating the main body 31.

[0047] In the embodiment of the present invention, a limiting cavity 41 is provided in the valve body 1, and a movable block 42 is provided in the limiting cavity 41. A second spring 43 is elastically supported between the movable block 42 and the limiting cavity 41. The opening of the limiting cavity 41 corresponds to the end of the main body 31. Under the action of the second spring 43, the movable block 42 is pushed out so that its end face contacts the end face of the main body 31. A third groove 36 and a fourth groove 37 are provided at one end of the main body 31 close to the adjusting inclined surface 33. The main body 31 is rotated so that the two can correspond to the movable block 42 respectively, and the movable block 42 extends out and is inserted into them. Similarly, the third groove 36 and the fourth groove 37 are arc surfaces, and the end of the movable block 42 is also an arc surface. The third groove 36 and the fourth groove 37 correspond to the open and closed states respectively, mainly providing feedback to the user to let the user know the current state of the steam valve.

[0048] As for accessories, recycling can also reduce costs. Most of the current steam valves are one-piece or non-detachable structures, which will result in defective products being unable to be repaired or recycled. The valve body 1 of this embodiment adopts a split structure, including a first shell 16 and a second shell 17, which are detachably connected. The air inlet 11 is located in the first shell 16, and the air outlet 12 is located in the second shell 17. After the two are disassembled, a larger space will be revealed, and the metal push rod 21 can be pulled out from it, which is convenient for maintenance and recycling. The first shell 16 and the second shell 17 are connected by threads or screws, which can have better pressure bearing capacity and are also easy to disassemble. A second sealing structure 18 and a positioning structure 19 are provided between the first shell 16 and the second shell 17 to facilitate positioning installation and prevent steam leakage.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-cost, high-stability steam valve, comprising a valve body (1), wherein the valve body (1) is provided with an air inlet (11) and an air outlet (12), and characterized in that: A transition opening (13) is provided between the two, and a metal push rod (21) is passed through the transition opening (13); The metal push rod (21) is elastically supported between one end of the metal push rod (21) close to the air inlet portion (11) and the valve body (1) against a first spring (22). A first sealing ring (23) is sleeved on the metal push rod (21). The first sealing ring (23) is located in the air inlet portion (11) and is used to block the transition opening (13). Control the switch (3) to push the metal push rod (21) toward the air inlet (11); In the initial state, there is a gap between the control switch and the metal push rod. When the high-pressure steam is continuously output, the air intake part maintains a high-pressure state, and cooperates with the superimposed thrust of the first spring to continuously apply pressure to the first sealing ring to improve the sealing performance.

2. A low-cost, high-stability steam valve according to claim 1, characterized in that: The valve body (1) and the control switch (3) are injection molded.

3. The low-cost and high-stability steam valve according to claim 1, characterized in that: The valve body (1) is provided with a first limiting groove (14) and a second limiting groove (15), which correspond to the two ends of the metal push rod (21) so that they can be inserted therein. One end of the metal push rod (21) passes through the second limiting groove (15) and extends to the control switch (3); A first sealing structure (27) is provided between one end of the metal push rod (21) close to the control switch (3) and the air outlet portion (12).

4. The low-cost, high-stability steam valve according to claim 1, characterized in that: The metal push rod (21) is provided with a first protrusion (24) and a second protrusion (25), a slot being formed between the two for fixing the first sealing ring (23), and the second protrusion (25) can be placed in the air outlet portion (12) and is provided with an adjusting cone surface (26).

5. The low-cost and high-stability steam valve according to claim 1, characterized in that: The control switch (3) comprises a main body (31), one end of the main body (31) is fixedly provided with a handle (32), and the other end is provided with an adjusting inclined surface (33).

6. The low-cost and high-stability steam valve according to claim 5, characterized in that: The two ends of the adjusting inclined surface (33) are respectively provided with a first groove (34) and a second groove (35), in which the ends of the metal push rod (21) can be placed.

7. The low-cost, high-stability steam valve according to claim 5, characterized in that: A limiting cavity (41) is provided in the valve body (1), a movable block (42) is provided in the limiting cavity (41), and a second spring (43) is elastically supported between the movable block (42) and the limiting cavity (41); A third groove (36) and a fourth groove (37) are provided at one end of the main body (31) close to the adjusting inclined surface (33). The main body (31) is rotated so that the third groove (36) and the fourth groove (37) can correspond to the movable block (42) respectively, and the movable block (42) extends out and is inserted into the third groove (36) and the fourth groove (37) can be inserted into the fourth groove (37).

8. The low-cost, high-stability steam valve according to claim 1, characterized in that: The valve body (1) comprises a first shell (16) and a second shell (17), which are detachably connected. The air inlet (11) is located in the first shell (16), and the air outlet (12) is located in the second shell (17).

9. The low-cost and high-stability steam valve according to claim 8, characterized in that: The first shell (16) and the second shell (17) are connected by threads or screws.

10. The low-cost and high-stability steam valve according to claim 8, characterized in that: A second sealing structure (18) and a positioning structure (19) are provided between the first shell (16) and the second shell (17).

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