Steam safety valve body, steam system and beverage processing equipment
By designing a steam safety valve body driven by differential pressure, the problems of complex structure and insensitive switching of traditional pressure relief valves are solved, and the safety and reliability of the steam system are improved.
Patent Information
- Application Number
- CN202421550107.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The pressure relief valve in traditional steam systems has the problem of complex structure and insensitive switching, which leads to safety hazards and inconvenient use.
A steam safety valve body is designed, including a valve housing, valve inner cover and valve spool member. By driving the movement of the valve spool member and valve inner cover through the pressure difference, the partitioning of the internal and external pressure of the steam boiler and rapid pressure relief is achieved.
This design simplifies the structure, improves the sensitivity of state switching, ensures the safety and reliability of the steam system, and avoids safety hazards.
Smart Images
Figure CN222669031U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field, and in particular to a steam safety valve body, a steam system and beverage cooking equipment. Background Art
[0002] In order to meet the needs of users, existing beverage preparation equipment such as coffee machines are generally pre-set with steam systems and other functional modules, each of which includes a brewing module. The steam system generally includes a steam boiler and a heating device arranged in the steam boiler. When the steam system is in a non-working state, the steam boiler is connected to the external environment; when the steam system is in a working state and the heating device is started and operated, the steam boiler must first be disconnected from the external environment and kept closed, so as to heat the cold water in the steam boiler to a preset temperature and form high-temperature steam; but when the pressure in the steam boiler gradually increases and exceeds the safety threshold, if the pressure relief treatment is not carried out in time, there is a potential safety hazard. In order to meet the above functional requirements, a pressure relief valve is generally pre-set in the existing steam system, but the existing pressure relief valve has the disadvantages of complex structure and insensitive switching when switching between the above states. Utility Model Content
[0003] The main purpose of the utility model is to provide a steam safety valve body, a steam system and a beverage cooking device, aiming to solve the problem that the pressure relief valve in the traditional steam system has a complex structure and insensitive switching.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a steam safety valve body, comprising:
[0005] The valve housing is provided with a first valve hole, a second valve hole and a valve cavity communicating with the first valve hole and the second valve hole, wherein the first valve hole is used to communicate with the air leakage port of the steam boiler;
[0006] a valve inner cover, disposed in the valve cavity and movably arranged in a first direction close to and away from the first valve hole, so as to have a first position covering the first valve hole and a second position opening the first valve hole, wherein the valve inner cover is provided with a through hole along the first direction; and
[0007] The valve core member is arranged on a side of the valve inner cover facing the first valve hole and is movably arranged along the first direction to have a third position covering the through hole and a fourth position opening the through hole.
[0008] Optionally, a pressure difference is formed between the pressure inside the steam boiler and the pressure outside the steam boiler; wherein,
[0009] When the pressure difference is not greater than a first threshold, the valve inner cover is in the first position and the valve core is in the fourth position;
[0010] When the pressure difference is greater than the first threshold value and not greater than the second threshold value, the valve inner cover is in the first position and the valve core member is driven to the third position;
[0011] When the pressure difference is greater than the second threshold, the valve core member is driven to push the valve inner cover to the second position.
[0012] Optionally, when the steam boiler is in a non-operating state, the pressure difference is not greater than the first threshold value;
[0013] When the steam boiler is in operation, the pressure difference is greater than the first threshold.
[0014] Optionally, the steam safety valve body further comprises an elastic member, wherein the elastic member is connected between the valve housing and the valve inner cover, and when the pressure difference is not greater than the second threshold value, the elastic member elastically presses the valve inner cover at the first position.
[0015] Optionally, the end surface of the valve inner cover facing away from the first valve hole is a first end surface, a mounting column is protruding from the first end surface, the elastic member is sleeved on the outside of the mounting column, and both ends of the elastic member are respectively abutted between the first end surface and the inner cavity wall of the valve cavity.
[0016] Optionally, the end surface of the valve inner cover facing the first valve hole is a second end surface, and the through hole is arranged through the second end surface;
[0017] The valve core member comprises:
[0018] a rod portion, which is inserted into the through hole, and the outer diameter of the rod portion is smaller than the hole diameter of the through hole; and
[0019] The disc portion is arranged outside the through hole and is located on a side of the valve inner cover close to the first valve hole. The outer diameter of the disc portion is larger than the aperture of the through hole. When in the third position, the disc portion is adapted to abut against the second end surface.
[0020] Optionally, the first direction is a gravity direction, and the first valve hole is provided at the bottom of the valve housing;
[0021] The steam safety valve body also includes a retaining spring, which is arranged at the top end of the valve inner cover and connected to the rod portion. The disc portion is suspended below the second end surface to drive the valve core member to be in the fourth position.
[0022] Optionally, the valve housing comprises a top shell and a bottom shell, the top shell is used to be fixed on the outer surface of the steam boiler, a part of the bottom shell is sealed and inserted into the air vent of the steam boiler, and the remaining part of the bottom shell is inserted into the top shell, the top shell and the bottom shell together enclose the valve cavity, and the bottom shell is penetrated by the first valve hole;
[0023] The steam safety valve body also includes an abutment plate made of elastic material, which is arranged on a side of the valve inner cover facing the first valve hole, and when the valve inner cover is in the first position and the valve core member is in the third position, the abutment plate is sealingly abutted against the bottom shell and the valve core member respectively.
[0024] Optionally, the end surface of the valve inner cover facing the first valve hole is a second end surface, the second end surface is provided with a groove, a convex column is partially protruded from the bottom wall of the groove, and the convex column penetrates the through hole;
[0025] The abutment plate is disposed around the outer side of the boss and is at least partially received in the groove;
[0026] The valve core component includes a rod portion passing through the through hole, and a disc portion located outside the through hole. The disc portion has an end surface facing the valve inner cover and an annular rib protruding from the periphery of the convex column corresponding to the convex column. When in the third position, the annular rib abuts against the abutment plate, and the convex column abuts against the inner ring position of the annular rib.
[0027] In addition, to achieve the above-mentioned purpose, the utility model also provides a steam system, including a steam boiler and the steam safety valve body as described above, wherein the steam boiler is provided with an air leak port, and the steam safety valve body is connected to the air leak port.
[0028] In addition, to achieve the above-mentioned purpose, the utility model also provides a beverage preparation device, including a casing and the steam system as described above, wherein the steam system is arranged in the casing.
[0029] In the technical solution provided by the utility model, when the steam system is in a non-working state, the valve inner cover is in the first position and the valve core is in the fourth position. At this time, the first valve hole is covered but the through hole is opened, and the steam boiler and the external environment are connected through the through hole and the second valve hole, ensuring that the pressures of the two are roughly the same, which is helpful for the daily maintenance of the steam boiler; when the steam system is in a working state and the heating device in the steam boiler starts to run, the pressure in the steam boiler gradually increases, first driving the valve core to move to the third position. At this time, the first valve hole is still covered and the through hole is also covered, and the steam boiler is connected. The steam boiler is isolated from the external environment, ensuring that the steam boiler remains closed and basically meets the vacuum boosting requirements; then when the pressure in the steam boiler continues to rise to exceed the safety threshold, the pressure continues to drive the valve core to move and push the valve cover to move to the second position. At this time, the first valve hole is opened and the through hole remains covered. The steam boiler is connected to the external environment through the first valve hole and the second valve hole. Since the flow area of the first valve hole is larger than that of the through hole, it ensures that the airflow in the steam boiler can flow out at a larger flow rate and flow rate, achieving rapid pressure relief, which helps to improve the safety of the steam system. The switching between the above-mentioned states does not require additional driving force or control by additional electrical signals. The movement process of the valve core and the valve cover is directly driven by the pressure in the steam boiler, which helps to simplify the structure of the whole machine and the sensitive state switching, and helps to improve the reliability of the steam system. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0031] Figure 1 A three-dimensional schematic diagram of an embodiment of a steam system provided by the utility model;
[0032] Figure 2 for Figure 1 Schematic diagram of the assembly of the steam safety valve body and the shell wall to be installed;
[0033] Figure 3 for Figure 2 Schematic diagram of the main structure of the steam safety valve body in the first perspective;
[0034] Figure 4 for Figure 2 Schematic diagram of the main structure of the steam safety valve body in the second perspective;
[0035] Figure 5 for Figure 2 Schematic diagram of the top view of the steam safety valve body;
[0036] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure at AA in the middle, wherein the valve inner cover is in the first position and the valve core member is in the fourth position;
[0037] Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure at AA in the middle, wherein the valve inner cover is in the first position and the valve core member is in the third position;
[0038] Figure 8 for Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle, wherein the valve inner cover is in the second position and the valve core is in the third position.
[0039] Description of Figure Numbers:
[0040] 100 steam boiler; 110 shell wall to be installed; 200 steam safety valve body; 210 valve shell; 210a valve cavity; 211 top shell; 211a second valve hole; 212 bottom shell; 212a first valve hole; 220 valve inner cover; 220a through hole; 221 first end face; 221a mounting column; 222 second end face; 222a groove; 222b convex column; 230 valve core member; 231 rod portion; 232 disc portion; 232a annular convex rib; 240 elastic member; 250 retaining spring; 260 abutment plate.
[0041] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0045] See also Figures 1 to 8 The utility model provides a steam safety valve body 200, which can be used in a steam boiler. The steam boiler generally includes a boiler body 100. The boiler body 100 has a shell wall 110 to be installed, and a gas leakage port connecting the internal environment and the external environment is opened on the shell wall 110 to be installed. The steam safety valve body 200 is fixed on the shell wall 110 to be installed and installed at the gas leakage port.
[0046] It can be understood that the air vent can be provided at any outer surface of the boiler body 100, that is, the shell wall 110 to be installed can refer to any outer surface of the boiler body 100. For example, when the boiler body 100 is substantially cylindrical, the shell wall 110 to be installed can be at any end surface or any area of the side surface of the boiler body 100. Figure 1 As shown, the shell wall 110 to be installed mainly refers to at least a partial area of the upper end surface of the boiler body 100 .
[0047] Steam boilers can be used in steam systems. And the steam system can be used in beverage preparation equipment according to actual needs. The specific type of beverage preparation equipment is not limited, and it can be but not limited to coffee machines, soy milk machines, food processors, etc., which can be used to process raw materials such as coffee beans and soybeans to finally obtain beverages such as coffee liquid and soy milk. Among them, the processing process can be but not limited to grinding, brewing and extraction. The beverage preparation equipment generally also includes a casing and a functional module arranged in the casing. The functional module can be set as, for example, a brewing module, a grinding module, a milk supply module, etc. according to actual needs. The steam system is at least partially arranged in the casing.
[0048] Since the main inventive point of the utility model is to improve the steam safety valve body 200, the structure of the steam safety valve body will be mainly described below in conjunction with the accompanying drawings.
[0049] First, please combine Figure 3 to Figure 4The steam safety valve body 200 provided by the utility model includes a valve housing 210 , a valve inner cover 220 and a valve core member 230 . Among them, the valve housing 210 is respectively provided with a first valve hole 212a, a second valve hole 211a and a valve cavity 210a connecting the first valve hole 212a and the second valve hole 211a, and the first valve hole 212a is used to connect the air leakage port connected to the boiler body 100; the valve inner cover 220 is arranged in the valve cavity 210a, and is movably arranged in a first direction close to and away from the first valve hole 212a, so as to have a first position H1 covering the first valve hole 212a, and a second position H2 opening the first valve hole 212a, and the valve inner cover 220 is penetrated by a through hole 220a along the first direction; the valve core member 230 is arranged on the side of the valve inner cover 220 facing the first valve hole 212a, and is movably arranged along the first direction, so as to have a third position H1 covering the through hole 220a, and a fourth position H0 opening the through hole 220a.
[0050] In the technical solution provided by the utility model, when the steam system is in a non-working state, the valve inner cover 220 is in the first position H1 and the valve core member 230 is in the fourth position H0. At this time, the first valve hole 212a is covered but the through hole 220a is opened. The boiler body 100 and the external environment are connected through the through hole 220a and the second valve hole 211a, ensuring that the pressures of the two are roughly the same, which is helpful for the daily maintenance of the boiler body 100; when the steam system is in a working state and the heating device in the boiler body 100 starts to run, the pressure in the boiler body 100 gradually increases, first driving the valve core member 230 to move to the third position H1, at which time the first valve hole 212a is still covered and the through hole 220a is also covered, and the boiler body 100 is opened. The boiler body 100 is isolated from the external environment, ensuring that the boiler body 100 remains closed and basically meets the vacuum pressure increase requirements; then when the pressure in the boiler body 100 continues to rise to exceed the safety threshold, the pressure continues to drive the valve core 230 to move and push the valve inner cover 220 to move to the second position H2, at which time the first valve hole 212a is opened and the through hole 220a remains covered, and the boiler body 100 and the external environment are connected through the first valve hole 212a and the second valve hole 211a, and because the flow area of the first valve hole 212a is larger than that of the through hole 220a, it is ensured that the airflow in the boiler body 100 can flow outward at a larger flow rate and flow rate, achieving rapid pressure relief, which helps to improve the safety of the steam system. And the switching between the above-mentioned states does not require additional driving force or control by additional electrical signals. The movement process of the valve core 230 and the valve inner cover 220 is directly driven by the pressure in the boiler body 100, which helps to simplify the structure of the whole machine and switch the state sensitively, and helps to improve the reliability of the steam system.
[0051] In such Figures 1 to 8In the illustrated embodiment, when the steam safety valve body 200 is disposed on the upper end surface of the steam boiler, the first direction is approximately the up-down direction. Based on this, the valve housing 210 is disposed approximately upwardly protruding on the shell wall 110 to be installed, and is cylindrical. The lower end surface of the valve housing 210 can be directly supported on the shell wall 110 to be installed, and the two can be detachably connected; or when the outer diameter of the lower section of the valve housing 210 is small, the lower section of the valve housing 210 can be inserted and connected with the air release port.
[0052] Specific as Figure 3 to Figure 4 As shown, the valve housing 210 includes a top housing 211 and a bottom housing 212. The top housing 211 is used to be fixed on the outer surface of the steam boiler and can be connected to the shell wall 110 to be installed in a contact or non-contact manner. The lower section of the bottom housing 212 is sealed and plugged into the air vent of the boiler body 100, and the remaining part of the bottom housing 212 is plugged into the top housing 211. The top housing 211 and the bottom housing 212 together enclose a valve cavity 210a. The bottom housing 212 is provided with a first valve hole 212a, and the top housing 211 is provided with a second valve hole 211a.
[0053] The bottom shell 212 may be specifically a cylindrical sealing structure, which may be made of a rigid material or an elastic material with a certain strength, so as to simultaneously seal and connect the top shell 211 and the shell wall 110 to be installed. The specific method of sealing connection is not limited, and may be achieved by interference fit through size design, or by means of a sealing structure such as a sealing ring.
[0054] By designing a detachable connection between the bottom shell 212 and the shell wall 110 to be installed, the steam safety valve body 200 as a whole can be disassembled and replaced according to actual needs, which is convenient for daily maintenance. By designing a detachable connection between the bottom shell 212 and the top shell 211, the components contained in the valve cavity 210a, such as the valve inner cover 220 and the valve core 230, can be disassembled and replaced according to actual needs.
[0055] As can be seen from the above, the bottom shell 212 is generally a cylindrical sealing structure, which is provided with a connecting channel connecting the valve cavity 210a and the first valve hole 212a. The valve inner cover 220 can be movably arranged at any position of the connecting channel, for example, at two channel openings of the connecting channel, or at any channel section of the connecting channel between the two channel openings. However, in order to make the structure of the valve inner cover 220 simple and easy to disassemble and assemble, in the example Figures 6 to 8 In the structure shown, the valve inner cover 220 is mainly movably arranged at a channel opening of the connecting channel away from the first valve hole 212a, and has a first position H1 abutting against the bottom shell 212 to close the connecting channel, and a second position H2 separated from the bottom shell 212 to open the connecting channel.
[0056] The valve inner cover 220 has a first end face 221 (i.e., the upper end surface) facing away from the first valve hole 212a / bottom shell 212, and a second end face 222 (i.e., the lower end surface) facing the first valve hole 212a / bottom shell 212. The valve inner cover 220 penetrates the first end face 221 and the second end face 222 in the up and down directions to form a through hole 220a.
[0057] Similarly to the above, the valve core member 230 can be movably arranged at any opening of the through hole 220a, or at any hole section of the through hole 220a between two openings. According to actual needs, the valve core member 230 can be arranged in any suitable shape such as a plate, a sheet, a sphere, etc. Figures 6 to 8 In the structure shown, the valve core member 230 includes a rod portion 231 and a disc portion 232. The rod portion 231 extends approximately in the up-down direction and is movably disposed in the through hole 220a in the up-down direction. The outer diameter of the rod portion 231 is smaller than the aperture of the through hole 220a so that an assembly gap can be formed between the outer wall of the rod portion 231 and the inner wall of the through hole 220a. The disc portion 232 is disposed outside the through hole 220a and is located on one side (i.e., the lower side) of the valve inner cover 220 close to the first valve hole 212a, and can be specifically located in the connecting channel. The outer diameter of the disc 232 is larger than the aperture of the through hole 220a. Thus, when the valve core 230 is in the third position H1, the disc 232 is adapted to abut against the second end face 222. On the one hand, the continued movement of the valve core 230 can be stopped and limited by the second end face 222, and on the other hand, the valve core 230 can completely block the assembly gap of the through hole 220a. When the valve core 230 is in the fourth position H0, the disc 232 is separated from the second end face 222, and the gas in the first valve hole 212a can flow to the second valve hole 211a through the assembly gap and finally be discharged to the external environment.
[0058] It should be noted that the second end face 222 can be set to a flat surface or a concave-convex surface with a concave-convex structure at least partially formed thereon, and the shape of the abutment between the valve core member 230 and the second end face 222 and the shape of the connection between the second end face 222 and the bottom shell 212 are adapted, so that when the valve inner cover 220 is in the first position H1 and the valve core member 230 is in the third position H1, the valve inner cover 220 and the bottom shell 212, and the valve core member 230 and the valve inner cover 220 are tightly connected and completely cut off the communication between the first valve hole 212a and the second valve hole 211a.
[0059] When the valve inner cover 220 is in the first position H1 and the valve core 230 is in the third position H1, the valve inner cover 220 may directly abut against the bottom shell 212, and / or the valve inner cover 220 may directly abut against the valve core 230. Figures 6 to 8As shown, in one embodiment, the steam safety valve body 200 further includes an abutment plate 260 made of an elastic material, which is arranged on the side of the valve inner cover 220 facing the first valve hole 212a, and when the valve inner cover 220 is in the first position H1 and the valve core member 230 is in the third position H1, the abutment plate 260 is sealed against the bottom shell 212 and the valve core member 230 respectively. In this way, on the one hand, it is helpful to make the abutment between the valve inner cover 220 and the bottom shell 212, and between the valve inner cover 220 and the valve core member 230 elastic abutment, which helps to reduce the wear generated when abutting each other and reduce the abutment noise; on the other hand, it is helpful to make the abutment between the valve inner cover 220 and the bottom shell 212, and between the valve inner cover 220 and the valve core member 230 tighter and almost without gaps through the force deformation of the abutment plate 260.
[0060] Specifically, in one embodiment, a groove 222a is formed on the second end surface 222 of the valve inner cover 220, a boss 222b is partially protruded from the bottom wall of the groove 222a, and a through hole 220a is penetrated by the boss 222b; the abutment plate 260 is arranged in a ring shape around the outer side of the boss 222b and is at least partially accommodated in the groove 222a. Among them, the end surface of the abutment plate 260 facing the first valve hole 212a can be set to be flush with the second end surface 222 of the valve inner cover 220, or the end surface of the abutment plate 260 facing the first valve hole 212a can be set to be lower than the second end surface 222 to form a drop, so that when the abutment plate 260 and the bottom shell 212, and the abutment plate 260 and the valve core member 230 abut, even if there is an abutment gap, the path of the abutment gap is relatively tortuous and longer, which helps to increase the difficulty of gas circulation, thereby further increasing the abutment tightness between the abutment plate 260 and the bottom shell 212, and between the abutment plate 260 and the valve core member 230.
[0061] Next, when the valve core member 230 includes the rod portion 231 and the disc portion 232 as described above, an annular rib 232a is protruded from the outer periphery of the convex column 222b corresponding to the end surface of the disc portion 232 facing the valve inner cover 220. When in the third position H1, the annular rib 232a abuts against the abutment plate 260, and the convex column 222b abuts against the inner ring position of the annular rib 232a. Similarly, it helps to increase the tortuosity and extension length of the abutment gap.
[0062] Based on any of the above embodiments, it can be understood that the valve inner cover 220 and the valve core member 230 are both movable in the up and down direction. And wherein, the driving force for the valve inner cover 220 to move from the first position H1 to the second position H2 and the valve core member 230 to move from the fourth position H0 to the third position H1 comes from the pressure difference formed between the boiler body 100 and the external environment. Specifically define the pressure difference as the pressure of the boiler body 100 minus the pressure of the external environment. Wherein, when the pressure difference is not greater than the first threshold, the valve inner cover 220 is in the first position H1 and the valve core member 230 is in the fourth position H0; when the pressure difference is greater than the first threshold and not greater than the second threshold, the valve inner cover 220 is in the first position H1 and the valve core member 230 is driven to the third position H1; when the pressure difference is greater than the second threshold, the valve core member 230 is driven and pushes the valve inner cover 220 to the second position H2.
[0063] Specifically, after being applied in a steam system, when the steam boiler is in a non-working state, the pressure difference is not greater than the first threshold value, which helps to achieve daily maintenance of the boiler body 100; when the steam boiler is in a working state, the pressure difference is greater than the first threshold value and can be switched between the first threshold value and the second threshold value.
[0064] Obviously, the first threshold is less than the second threshold. The first threshold and the second threshold can be determined comprehensively according to actual needs, such as the specifications of the boiler body 100 in actual application, the power of the heating device set in the boiler body 100, the target demand value of steam, etc. The first threshold and the second threshold can be fixed values or range values. Among them, the first threshold can be any illustrative value less than zero, equal to zero or greater than zero; the second threshold is a value greater than zero.
[0065] Next, in one embodiment, the steam safety valve body 200 further includes an elastic member 240, which is connected between the valve housing 210 and the valve inner cover 220, and when the pressure difference is not greater than the second threshold, the elastic member 240 elastically presses the valve inner cover 220 at the first position H1. That is, the elastic member 240 can at least provide a driving force for the valve inner cover 220 to reset from the second position H2 to the first position H1, so that the valve inner cover 220 can repeatedly switch between the first position H1 and the second position H2.
[0066] The type of the elastic member 240 is not limited, and may be, but not limited to, a spring member, a metal spring sheet, a rubber block, etc. Among them, when the elastic member 240 is arranged in a cylindrical shape, in a further scheme, the end surface of the valve inner cover 220 facing away from the first valve hole 212a is the first end surface 221, and the first end surface 221 is convexly provided with a mounting column 221a, and the elastic member 240 is sleeved on the outside of the mounting column 221a, and the two ends of the elastic member 240 are respectively abutted between the first end surface 221 and the inner cavity wall of the valve cavity 210a. The mounting column 221a can radially limit the elastic member 240 to prevent the elastic member 240 from being displaced between the first end surface 221 and the inner cavity wall of the valve cavity 210a, causing the elastic member 240 to be detached.
[0067] Of course, the driving force when the valve core member 230 is reset from the third position H1 to the fourth position H0 can also be provided by the same elastic member 240 or another elastic structure as described above. Or in one embodiment, the first direction is the gravity direction, and the first valve hole 212a is arranged at the bottom of the valve housing 210; the steam safety valve body 200 also includes a retaining spring 250, which is arranged at the top of the valve inner cover 220 and connected to the rod 231, and the disc 232 is suspended below the second end surface 222, so that the valve core member 230 is in the fourth position H0. It can be understood that the valve core member 230 is made of a material with a certain weight, such as a metal material. When the above-mentioned pressure difference is less than or equal to the first threshold value, for example, when the pressure in the boiler body 100 is not greater than the pressure of the external environment, the valve core member 230 is basically not subjected to an upward force. At this time, at least under the influence of the gravity of the valve core member 230 itself, the valve core member 230 moves downward relative to the valve cover to the fourth position H0.
[0068] The retaining spring 250 can be specifically connected to the rod portion 231, and the outer diameter of the retaining spring 250 is larger than the aperture of the through hole 220a, so that when the retaining spring 250 is driven by the rod portion 231 and moves downward to abut the first end surface 221 of the valve inner cover 220, the valve core member 230 will not continue to move downward but hang in the air and maintain at the fourth position H0.
[0069] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A steam safety valve body, characterized in that: include: The valve housing is provided with a first valve hole, a second valve hole and a valve cavity communicating with the first valve hole and the second valve hole, wherein the first valve hole is used to communicate with the air leakage port of the steam boiler; a valve inner cover, disposed in the valve cavity and movably arranged in a first direction close to and away from the first valve hole, so as to have a first position covering the first valve hole and a second position opening the first valve hole, wherein the valve inner cover is provided with a through hole along the first direction; and The valve core member is arranged on a side of the valve inner cover facing the first valve hole and is movably arranged along the first direction to have a third position covering the through hole and a fourth position opening the through hole.
2. The steam safety valve body according to claim 1, characterized in that: A pressure difference is formed between the pressure inside the steam boiler and the pressure outside the steam boiler; wherein, When the pressure difference is not greater than a first threshold, the valve inner cover is in the first position and the valve core is in the fourth position; When the pressure difference is greater than the first threshold value and not greater than the second threshold value, the valve inner cover is in the first position and the valve core member is driven to the third position; When the pressure difference is greater than the second threshold, the valve core member is driven to push the valve inner cover to the second position.
3. The steam safety valve body according to claim 2, characterized in that: When the steam boiler is in a non-operating state, the pressure difference is not greater than the first threshold value; When the steam boiler is in operation, the pressure difference is greater than the first threshold.
4. The steam safety valve body according to claim 2, characterized in that: The steam safety valve body further comprises an elastic member, which is connected between the valve housing and the valve inner cover, and when the pressure difference is not greater than the second threshold value, the elastic member elastically presses the valve inner cover at the first position.
5. The steam safety valve body according to claim 4, characterized in that: The end surface of the valve inner cover facing away from the first valve hole is a first end surface, and a mounting column is convexly provided on the first end surface. The elastic member is sleeved on the outside of the mounting column, and the two ends of the elastic member are respectively abutted between the first end surface and the inner cavity wall of the valve cavity.
6. The steam safety valve body according to claim 1, characterized in that: The end surface of the valve inner cover facing the first valve hole is a second end surface, and the through hole is arranged through the second end surface; The valve core member comprises: a rod portion, which is inserted into the through hole, and the outer diameter of the rod portion is smaller than the hole diameter of the through hole; and The disc portion is arranged outside the through hole and is located on a side of the valve inner cover close to the first valve hole. The outer diameter of the disc portion is larger than the aperture of the through hole. When in the third position, the disc portion is adapted to abut against the second end surface.
7. The steam safety valve body according to claim 6, characterized in that: The first direction is the direction of gravity, and the first valve hole is provided at the bottom of the valve housing; The steam safety valve body also includes a retaining spring, which is arranged at the top end of the valve inner cover and connected to the rod portion. The disc portion is suspended below the second end surface to drive the valve core member to be in the fourth position.
8. The steam safety valve body according to claim 1, characterized in that: The valve housing comprises a top shell and a bottom shell, the top shell is used to be fixed on the outer surface of the steam boiler, a part of the bottom shell is sealed and inserted into the air vent of the steam boiler, and the remaining part of the bottom shell is inserted into the top shell, the top shell and the bottom shell together enclose the valve cavity, and the bottom shell is penetrated by the first valve hole; The steam safety valve body also includes an abutment plate made of elastic material, which is arranged on a side of the valve inner cover facing the first valve hole, and when the valve inner cover is in the first position and the valve core member is in the third position, the abutment plate is sealingly abutted against the bottom shell and the valve core member respectively.
9. The steam safety valve body according to claim 8, characterized in that: The end surface of the valve inner cover facing the first valve hole is a second end surface, the second end surface is provided with a groove, a convex column is partially protruded on the bottom wall of the groove, and the convex column penetrates the through hole; The abutment plate is disposed around the outer side of the boss and is at least partially received in the groove; The valve core component includes a rod portion passing through the through hole, and a disc portion located outside the through hole. The disc portion has an end surface facing the valve inner cover and an annular rib protruding from the periphery of the convex column corresponding to the convex column. When in the third position, the annular rib abuts against the abutment plate, and the convex column abuts against the inner ring position of the annular rib.
10. A steam system, characterized in that: It comprises a steam boiler and a steam safety valve body as claimed in any one of claims 1 to 9, wherein the steam boiler is provided with an air leak port, and the steam safety valve body is connected to the air leak port.
11. A beverage preparation device, characterized in that: It comprises a casing and the steam system as claimed in claim 10, wherein the steam system is arranged in the casing.