Safety valve and steam sterilization pot

Abstract

The utility model discloses a safety valve and a steam sterilization pot, and belongs to the technical field of safety valves. The valve comprises a valve seat and a valve body, the valve seat is arranged on the lower portion of the valve body and detachably connected with the valve body, a medium inlet is formed in the valve seat, a medium outlet is formed in the valve body, and when the valve seat is connected with the valve body, the medium inlet and the medium outlet penetrate through a valve cavity with a sealing gasket to be communicated with each other. The safety valve further comprises an adjusting screw, an elastic piece, a valve rod and a valve clack. According to the safety valve and the steam sterilization pot, a traditional integrated design of the valve seat and the valve body is changed into a detachable design, and the contact part of the valve seat and the valve body with the sealing gasket is designed, so that the problem that the sealing gasket is easy to deform due to unstable opening pressure and closing pressure of the safety valve is avoided; meanwhile, the ring part is arranged at the bottom of the valve clack of the valve rod, and equipment needing to be protected can be better protected through the recoil effect of the ring part.

Description

Technical Field

[0001] This utility model belongs to the field of safety valve technology, and more specifically, relates to a safety valve and a steam sterilizer. Background Technology

[0002] A steam safety valve is an automatic valve that opens and closes automatically. It plays a safety protection role in pressure systems. When the system pressure exceeds the valve's set pressure, the valve automatically opens to release some gas or other fluids from the system. When the system pressure returns to normal, the valve automatically closes, repeating this process to ensure the system pressure never exceeds the specified value, thus preventing accidents caused by excessive pressure. Existing sterilizer safety valves have the following drawbacks:

[0003] 1. Safety valves are small in overall size, and the valve seat and valve body are integral. It is difficult to achieve the required precision in machining the sealing surface, which leads to problems such as unstable pressure when opening and closing, affecting the performance of the safety valve.

[0004] 2. The valve disc seal does not have a backflow mechanism, and the opening height of the safety valve is insufficient when it is opened, resulting in a reduced discharge capacity and failure to promptly discharge the medium to reduce pressure.

[0005] Therefore, the existing technology still needs further improvement. Summary of the Invention

[0006] The problem to be solved

[0007] To address the problem of unstable pressure during the opening and closing of safety valves in existing technologies, which affects the poor performance of safety valves, this utility model provides a safety valve and a steam sterilizer.

[0008] Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A safety valve includes a valve seat and a valve body. The valve seat is disposed at the lower part of the valve body and is detachably connected to the valve body. The valve seat has a medium inlet, and the valve body has a medium outlet. When the valve seat and the valve body are connected to each other, the medium inlet and the medium outlet communicate with each other through a valve cavity with a sealing gasket. The safety valve further includes:

[0011] The adjusting screw is located on the upper part of the valve body and can be adjusted vertically relative to the valve cavity.

[0012] An elastic element and a valve stem and valve disc are disposed within the valve cavity. The elastic element is disposed between the adjusting screw and the valve stem and valve disc, so that the valve stem and valve disc press against the sealing gasket, allowing the sealing gasket to contact and seal with the valve seat and the valve stem and valve disc respectively.

[0013] Preferably, the bottom of the valve body has an inwardly recessed limiting portion, and the upper part of the valve seat has a limiting head that can be fitted and accommodated in the limiting portion, and the limiting portion of the valve body and the limiting head of the valve seat are threadedly engaged.

[0014] Preferably, the surface of the valve seat facing the sealing gasket is a first plane, the first plane including a portion that is in close contact with the valve stem and valve disc and a portion that is in close contact with the sealing gasket;

[0015] The first plane has one or more outwardly protruding first protrusions on the portion of the first plane that is in close contact with the sealing gasket. When the valve seat is pressed against the sealing gasket, the first protrusions on the first plane press tightly against the sealing gasket.

[0016] Preferably, the surface of the valve stem valve disc opposite to the first plane is a second plane, and a second protrusion is formed on the second plane. The second protrusion extends from the end of the second plane and extends longitudinally at the side end of the valve stem valve disc in the opposite direction to the main body of the valve stem valve disc, forming a ring at the bottom end of the valve stem valve disc.

[0017] When the valve seat and valve body are connected to each other, the limiting head of the valve seat extends into the ring and abuts against the valve stem, valve disc and sealing gasket.

[0018] Preferably, the elastic element is a compression spring, and the two ends of the compression spring are respectively connected to the adjusting screw and the valve stem valve disc.

[0019] Preferred options also include:

[0020] The lock nut is fitted onto the adjusting screw and engages with the screw's thread.

[0021] Preferably, the valve body has an engagement portion on its outer periphery.

[0022] In another aspect of this application, a steam sterilizer is also provided, comprising a pot body and a safety valve as described in any of the above claims, wherein the medium inlet is connected to the pot body and communicates with the pot cavity of the pot body.

[0023] Beneficial effects

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] (1) The safety valve provided by this utility model, when faced with the problem of easy deformation of the sealing gasket caused by the instability of the opening pressure and closing pressure of the safety valve, does not seek to improve the processing accuracy of the sealing gasket, but starts from the valve seat and valve body, changing the valve seat and valve body from the traditional integrated design to a detachable design, and at the same time designing the contact part between the valve seat and valve body and the sealing gasket, ultimately avoiding the problem of easy deformation of the sealing gasket caused by the instability of the opening pressure and closing pressure of the safety valve;

[0026] (2) The safety valve provided by this utility model has a valve seat and a valve body threadedly connected. An adjusting screw is threadedly connected to the valve body. The adjusting screw is adjusted downward to press the elastic element, thereby pressing the valve stem and valve disc, and then pressing the sealing gasket. The first plane of the valve seat is provided with a first protrusion in close contact with the sealing gasket. The first protrusion can cause the sealing gasket to deform slightly, forming a main seal between the sealing gasket and the valve seat. At the same time, since the valve stem and valve disc can also be in close contact with the valve seat, a secondary seal can also be formed between the lower plane of the valve stem and valve disc and the valve seat. This main and secondary sealing structure can effectively solve the problem of easy deformation of the sealing gasket caused by the unstable opening and closing pressure of the safety valve.

[0027] (3) This utility model provides a second protrusion on the second plane of the valve stem and valve disc. The second protrusion extends longitudinally at the side end of the valve stem and valve disc in the opposite direction to the main body of the valve stem and valve disc, forming a ring at the bottom end of the valve stem and valve disc. At this time, the limiting head of the valve seat extends into the ring and abuts against the valve stem, valve disc and sealing gasket. The lower plane of the ring is lower than the first plane of the valve seat. At this time, the ring has a back-flush effect. When the safety valve is opened, the medium can quickly push the valve stem and valve disc to the standard height, so that the medium can be discharged quickly, increasing the discharge volume and better protecting the equipment to be protected. Attached Figure Description

[0028] Figure 1 This is a perspective view of the safety valve in one specific embodiment of the present utility model;

[0029] Figure 2 This is a cross-sectional view of the safety valve in one specific embodiment of the present invention;

[0030] Figure 3 for Figure 2 A magnified view of part A shown in the diagram;

[0031] In the diagram: 100, valve seat; 110, first protrusion; 200, valve body; 300, sealing gasket; 400, adjusting screw; 500, elastic element; 600, valve stem and valve disc; 610, second protrusion; 700, locking nut. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Existing safety valves are small in overall size, with the valve seat and valve body being a single unit. The sealing surface is difficult to machine with the required precision, which leads to problems such as unstable pressure during opening and closing, affecting the performance of the safety valve.

[0037] To address the aforementioned technical issues, one implementation method does not seek to improve the machining precision of the sealing gasket. Instead, it focuses on the valve seat and valve body, changing the traditional integrated design of the valve seat and valve body to a detachable design. At the same time, it designs the contact parts between the valve seat / valve body and the sealing gasket, ultimately avoiding the problem of easy deformation of the sealing gasket caused by unstable opening and closing pressures of the safety valve.

[0038] like Figures 1 to 3 As shown, in one specific embodiment, the safety valve includes a valve seat 100 and a valve body 200. The valve seat 100 is disposed at the lower part of the valve body 200 and is detachably connected to the valve body 200.

[0039] Specifically, the bottom of the valve body 200 has an inwardly recessed limiting portion, and the upper part of the valve seat 100 has a limiting head that can be accommodated in the limiting portion. The limiting portion of the valve body 200 and the limiting head of the valve seat 100 are threadedly engaged.

[0040] The valve seat 100 has a medium inlet, and the valve body 200 has a medium outlet. When the valve seat 100 and the valve body 200 are connected to each other, the medium inlet and the medium outlet communicate with each other through the valve cavity with a sealing gasket 300. The safety valve also includes an adjusting screw 400, an elastic element 500, and a valve stem and valve disc 600.

[0041] The adjusting screw 400 is located on the upper part of the valve body 200 and can be adjusted vertically relative to the valve cavity. Specifically, the main function of the adjusting screw 400 is to provide a certain prestress to the sealing gasket 300 when the safety valve is not yet in operation. The prestress provided by the adjusting screw 400 needs to be greater than the pressure generated by the internal pressure of the boiler on the safety valve under normal operating conditions.

[0042] Specifically, the safety valve also includes a locking nut 700, which is sleeved on the adjusting screw 400 and threadedly engaged with the adjusting screw 400.

[0043] The valve body 200 is provided with a meshing part on its outer periphery. When it is necessary to adjust the position of the adjusting screw 400 in the valve cavity, a tool can be used to mesh the meshing part of the valve body 200, and then the position of the adjusting screw 400 can be adjusted by screwing the locking nut 700.

[0044] In a preferred embodiment, after the adjusting screw 400 is adjusted to the specified position, the adjusting screw 400 is locked with the locking nut 700 to prevent the adjusting screw 400 from loosening. Then, the locking nut 700 is locked to the valve body 200 with a lead seal and steel wire to prevent personnel from disassembling it without authorization.

[0045] The elastic element 500 and the valve stem and valve disc 600 are both disposed in the valve cavity. The elastic element 500 is disposed between the adjusting screw 400 and the valve stem and valve disc 600 so that the valve stem and valve disc 600 press against the sealing gasket 300, so that the sealing gasket 300 can contact and seal with the valve seat 100 and the valve stem and valve disc 600 respectively.

[0046] More specifically, the elastic element 120 is a compression spring, and the two ends of the compression spring are respectively connected to the adjusting screw 400 and the valve stem valve disc 600.

[0047] Furthermore, the surface of the valve seat 100 facing the sealing gasket 300 is a first plane, which includes a portion that is in close contact with the valve stem and valve disc 600 and a portion that is in close contact with the sealing gasket 300. One or more outwardly protruding first protrusions 110 are provided on the portion of the first plane that is in close contact with the sealing gasket 300. When the valve seat 100 abuts against the sealing gasket 300, the first protrusions 110 on the first plane press tightly against the sealing gasket 300.

[0048] In this embodiment, the valve seat is threadedly connected to the valve body, and the adjusting screw is also threadedly connected to the valve body. The adjusting screw is adjusted downwards to tighten the elastic element, thereby tightening the valve stem and valve disc, and then tightening the sealing gasket. The first plane of the valve seat has a first protrusion on the part that is in close contact with the sealing gasket. The first protrusion can cause slight deformation of the sealing gasket, forming a primary seal between the sealing gasket and the valve seat. At the same time, since the valve stem and valve disc can also be in close contact with the valve seat, a secondary seal can also be formed between the lower plane of the valve stem and valve disc and the valve seat. This primary and secondary sealing structure can effectively solve the problem of easy deformation of the sealing gasket caused by the unstable opening and closing pressures of the safety valve.

[0049] In a preferred embodiment, the surface of the valve stem valve disc 600 opposite to the first plane is a second plane. The second plane has a second protrusion 610, which extends from the end of the second plane and extends longitudinally at the side end of the valve stem valve disc 600 in a direction opposite to the main body of the valve stem valve disc 600, forming a ring at the bottom end of the valve stem valve disc 600.

[0050] By providing a second protrusion on the second plane of the valve stem and valve disc, the second protrusion extends longitudinally at the side end of the valve stem and valve disc in the opposite direction to the main body of the valve stem and valve disc, forming a ring at the bottom end of the valve stem and valve disc. At this time, the limiting head of the valve seat extends into the ring and abuts against the valve stem, valve disc and sealing gasket. The lower plane of the ring is lower than the first plane of the valve seat. At this time, the ring has a back-flush effect. When the safety valve is opened, the medium can quickly push the valve stem and valve disc to the standard height, so that the medium can be discharged quickly, increasing the discharge volume and better protecting the equipment to be protected.

[0051] The examples described herein are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the design concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A safety valve, comprising a valve seat (100) and a valve body (200), characterized in that: The valve seat (100) is disposed at the lower part of the valve body (200) and is detachably connected to the valve body (200). The valve seat (100) has a medium inlet, and the valve body (200) has a medium outlet. When the valve seat (100) and the valve body (200) are connected to each other, the medium inlet and the medium outlet communicate with each other through a valve cavity with a sealing gasket (300). The safety valve further includes: The adjusting screw (400) is located on the upper part of the valve body (200) and can be adjusted vertically relative to the valve cavity. An elastic element (500) and a valve stem valve disc (600) are disposed in the valve cavity. The elastic element (500) is disposed between the adjusting screw (400) and the valve stem valve disc (600) so that the valve stem valve disc (600) presses against the sealing gasket (300) so that the sealing gasket (300) can contact and seal with the valve seat (100) and the valve stem valve disc (600) respectively.

2. The safety valve according to claim 1, characterized in that: The bottom of the valve body (200) has an inwardly recessed limiting portion, and the upper part of the valve seat (100) has a limiting head that can be fitted into the limiting portion. The limiting portion of the valve body (200) and the limiting head of the valve seat (100) are threadedly engaged.

3. The safety valve according to claim 2, characterized in that: The surface of the valve seat (100) facing the sealing gasket (300) is a first plane, which includes a portion that is in close contact with the valve stem and valve disc (600) and a portion of the sealing gasket (300). The first plane is provided with one or more outwardly protruding first protrusions (110) on the part of the first plane that is in close contact with the sealing gasket (300). When the valve seat (100) is pressed against the sealing gasket (300), the first protrusions (110) on the first plane press the sealing gasket (300).

4. The safety valve according to claim 3, characterized in that: The surface of the valve stem valve disc (600) opposite to the first plane is a second plane. The second plane has a second protrusion (610). The second protrusion (610) extends from the end of the second plane and extends longitudinally at the side end of the valve stem valve disc (600) in the opposite direction to the main body of the valve stem valve disc (600), forming a ring at the bottom end of the valve stem valve disc (600). When the valve seat (100) and the valve body (200) are connected to each other, the limiting head of the valve seat (100) extends into the ring and abuts against the valve stem valve disc (600) and the sealing gasket (300).

5. The safety valve according to claim 1, characterized in that: The elastic element (500) is a compression spring, and the two ends of the compression spring are respectively connected to the adjusting screw (400) and the valve stem valve disc (600).

6. The safety valve according to claim 1, characterized in that: Also includes: The locking nut (700) is fitted onto the adjusting screw (400) and engages with the thread of the adjusting screw (400).

7. The safety valve according to claim 1, characterized in that: The valve body (200) has an engagement part on its outer periphery.

8. A steam sterilizer, characterized in that, It includes a pot body and a safety valve as described in any one of claims 1-7, wherein the medium inlet is connected to the pot body and communicates with the pot cavity of the pot body.

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