High-temperature one-way valve

Abstract

The utility model relates to a high-temperature one-way valve which comprises an inlet valve body, an outlet valve body and a switch assembly, the inlet valve body is detachably connected with the outlet valve body, the switch assembly is arranged between the inlet valve body and the outlet valve body, and one end of the switch assembly and the inlet valve body are hermetically arranged in an abutting mode. The other opposite end and the outlet valve body are arranged in a compressible mode, a through hole convenient for gas to pass through is machined in the switch assembly, and the through hole is communicated with the outlet valve body; one-way circulation of gas flow is achieved, switching between gas feeding and gas stopping can be flexibly controlled, smooth gas feeding can be guaranteed, reliability after closing can be guaranteed, and the whole valve is small in opening pressure, compact in structure, good in reverse sealing performance in the high-temperature environment and capable of being suitable for various industrial gas environments such as argon and natural gas.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial gas components, in particular to a high-temperature one-way valve applicable to various industrial gas environments such as argon gas and natural gas. Background Art

[0002] A one-way valve is a valve body that only allows the medium (such as water, oil, gas, etc.) to flow in one direction, and does not allow the medium to flow back / backward / backward, that is, it only allows the medium to flow in from the inlet and out from the outlet, and does not allow the medium to flow in from the outlet and out from the inlet. The most common one-way valve is a spring-loaded one-way valve, which consists of a valve body, a valve core, a spring, and a sealing ring. Under the action of external pressure, the spring is compressed, the valve core opens, the one-way valve is in a conducting state, and the medium can pass through the one-way valve; when the external pressure disappears, the spring resets, the valve core closes, the one-way valve is in a closed state, and the medium cannot pass through; when the external pressure acts on the spring in the opposite direction, the spring is not compressed, the valve core cannot open, the one-way valve remains closed, and the medium cannot pass through.

[0003] In order to meet the transportation of high-temperature gaseous media, the high-temperature one-way valve is designed as a multi-layer sealing body to avoid contact with high-temperature media. This not only has a complex structure but also has a large opening resistance, which affects the versatility of the valve. After high-temperature baking, the reverse flow coefficient is greater than 0.1% of the forward flow system, and the sealing performance on site is relatively low. Secondly, the opening pressure of the high-temperature valve in the prior art is around 0.2MPa, and the opening pressure is relatively high. The valve body cannot be fully opened at a low pressure of 0.05MPa, which easily leads to a low flow rate in the near future. Thirdly, the existing high-temperature one-way valve is limited by its structural characteristics and can only be installed vertically or horizontally. The scenarios in which it is used cannot meet the needs of multi-directional use.

[0004] In the prior art, improved structural forms have been proposed for the structure of the high-temperature one-way valve body, but there are still problems with difficult sealing and instability. In the patent with patent number 202021818053.1, entitled A pipeline cleaning liquid injection device for a heat pump water heater, a specific structure of the pipeline of a heat pump water heater is provided, in which a valve core ball is arranged in the valve cavity to form a sealing fit with the end of the first water inlet hole, thereby achieving a one-way seal. Although the one-way valve body structure with this structure overcomes the defect that the traditional one-way valve is restricted by the installation position, because the valve core ball only relies on the spring to achieve sealing fit, under greater pressure, the valve core ball is easily subjected to uneven force, resulting in spring instability, which directly affects the sealing of the valve core ball and the first water inlet hole. There is still a defect that the stability and reliability of the valve body seal are difficult to be effectively guaranteed.

[0005] In view of this, there is an urgent need for a high-temperature one-way valve that can flexibly control the switching between ventilation and air cutoff during operation, which can ensure both smooth ventilation and reliability after closure. The whole valve has a small opening pressure, a compact structure, and good reverse sealing performance in high-temperature environments. It can be used in a variety of industrial gas environments such as argon and natural gas. Summary of the invention

[0006] In order to solve the above technical problems, the utility model provides a high-temperature one-way valve that can be used in various industrial gas environments such as argon and natural gas. It can flexibly control the switching between ventilation and shut-off during operation, which can ensure both smooth ventilation and reliability after closure. The whole valve has a small opening pressure and a compact structure. It has good reverse sealing performance in high temperature environments and can be used in various industrial gas environments such as argon and natural gas.

[0007] To achieve the above purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0008] A high-temperature one-way valve comprises an inlet valve body, an outlet valve body and a switch assembly, wherein the inlet valve body is detachably connected to the outlet valve body, the switch assembly is arranged between the inlet valve body and the outlet valve body, one end of the switch assembly is sealed against the inlet valve body, and the other end of the switch assembly is compressible with the outlet valve body, the switch assembly is processed with a through hole for gas to pass through, and the through hole is connected to the outlet valve body; the one-way flow of air is realized, and the switching between ventilation and air cut-off can be flexibly controlled, which can ensure both smooth ventilation and reliability after closing. The whole valve has a small opening pressure and a compact structure, and has good reverse sealing performance in a high-temperature environment, and can be suitable for a variety of industrial gas environments such as argon and natural gas.

[0009] Furthermore, in order to ensure the reliability of the unidirectional flow of the airflow, the switch assembly includes a sealing end and an elastic member, one end of the elastic member abuts against the outlet valve body, and the other end relatively arranged is housed in the end of the sealing end away from the inlet valve body, and the sealing end is arranged to be retractably compressed by the elastic member and the outlet valve body.

[0010] Furthermore, at least two coaxial stepped cavities with different inner diameters are processed inside the outlet valve body, and the sealing end can be movably received in the inner cavity of the outlet valve body, and can resist the sealing arrangement relative to the inlet valve body.

[0011] Furthermore, an open internal cavity is processed at one end of the sealing end away from the inlet valve body, the elastic member is a spring that rests in the internal cavity of the sealing end, and the other end that is oppositely arranged rests on the inner cavity of the outlet valve body, and the elastic member is coaxially arranged with the sealing end.

[0012] Furthermore, the end side surface of the sealing end close to the inlet valve body is processed into an outwardly convex spherical arc surface.

[0013] Furthermore, the switch assembly also includes a cone sleeve adapted to the sealing end, and the cone sleeve is arranged and embedded in the interior of the outlet valve body, and is located at one end of the inlet valve body close to the sealing end.

[0014] Furthermore, the inner cavity of the contact end of the cone sleeve and the sealing end is processed into a concave arc surface.

[0015] Furthermore, there are at least two through holes, which are evenly distributed along the arc surface of the sphere at the sealing end.

[0016] Furthermore, it also includes an inlet joint connected to the inlet valve body, wherein the inlet joint is located at the end side of the inlet valve body away from the outlet valve body and is detachably connected to the inlet valve body.

[0017] Furthermore, it also includes an outlet connector connected to the outlet valve body, wherein the outlet connector is located at an end side away from the outlet valve body and is detachably connected to the outlet valve body.

[0018] The high-temperature one-way valve provided in the above embodiment can ensure that the sealing end can stably run along a preset trajectory by setting a cavity with different inner diameters inside the outlet valve body and accommodating and restricting the sealing end in the cavity with different inner diameters; by setting the elastic member as a spring and setting the sealing end coaxially, it is ensured that the sealing end can smoothly reciprocate along its axial direction under the action of the pressure difference; the tapered sleeve can ensure convenient sealing with the sealing end, thereby further improving the sealing between the switch assembly and the inlet valve body. By processing the concave arc surface, the contact area with the arc surface of the spherical body at the sealing end can be larger, and the effective sealing area is significantly increased, which ensures the reliability of airtightness and improves the flexibility of contact sealing. The fault tolerance of the sealing surface is improved with the help of the arc surface, and the sealing end can be sealed to the inlet valve body more efficiently and stably; by setting a plurality of through holes, the resistance in the flow process can be effectively reduced, and the vibration caused by the uneven force of the spring in the flow process can be eliminated, thereby ensuring the stability of the entire one-way valve body during operation, thereby overcoming the limitation that the one-way valve suitable for high-temperature gas in the prior art can only be installed vertically or horizontally, and expanding the use conditions of the one-way valve provided by the present invention, which can meet multi-directional use requirements; it realizes the one-way flow of airflow, and can flexibly control the switching between ventilation and air cut-off, which can ensure both smooth ventilation and reliability after closure. The whole valve has a small opening pressure and a compact structure, and has good reverse sealing performance under high temperature environment, and can be suitable for various industrial gas environments such as argon and natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a high-temperature one-way valve. DETAILED DESCRIPTION

[0020] 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.

[0021] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly. In addition, if the embodiments of the present invention involve descriptions of "first, second", "S1, S2", "step one, step two", etc., then such descriptions are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that everything that does not violate the gist of the invention under the technical concept of the invention should be included in the protection scope of the present invention.

[0022] As described in the background technology, the existing high-temperature one-way valve is based on a specific operating environment. Due to the limitations of the existing structure of the high-temperature one-way valve, it cannot meet the needs of actual projects, let alone ultra-high temperatures, such as operating environments with temperatures exceeding 600°C. In view of this, the utility model patent proposes a one-way valve structure that can meet temperatures exceeding 600°C.

[0023] like Figure 1As shown, a high-temperature one-way valve according to some exemplary embodiments includes an inlet valve body 10, an outlet valve body 20 and a switch assembly 30, wherein the inlet valve body 10 is detachably connected to the outlet valve body 20, and the switch assembly 30 is arranged between the inlet valve body 10 and the outlet valve body 20, with one end being a sealing arrangement that can contact the inlet valve body 10, and the other end being relatively arranged and compressible with the outlet valve body 20, and the switch assembly 30 is processed with a through hole 311 for facilitating the passage of gas, and the through hole 311 is arranged to communicate with the outlet valve body 20. Therefore, due to the sealable connection between the switch assembly 30 and the inlet valve body 10, the sealing of the inlet valve body 10 can be achieved. When the gas pressure inside the inlet valve body 10 is large enough, the switch assembly 30 can be pushed, so that a gap appears between the switch assembly 30 and the inlet valve body 10, thereby forming a channel for the internal high-temperature gas to circulate, and then enter the through hole 311 and enter the outlet valve body 20, thereby achieving the high-temperature gas entering from the inlet valve body 10, flowing through the switch assembly 30, and then flowing out from the outlet valve body 20. When the pressure of the gas inside the inlet valve body 10 is lower than the pressure of the gas inside the outlet valve body 20, at this time, under the action of the gas inside the outlet valve body 20, due to the existing pressure difference, the switch assembly 30 is sealed with the inlet valve body 10, thereby preventing the gas inside the outlet valve body 20 from flowing back directly into the inlet valve body 10, thereby ensuring that the gas can only have a one-way flow path from the inlet valve body 10 to the outlet valve body 20, realizing the one-way flow of the airflow, and being able to flexibly control the switching between ventilation and air cut-off, which can ensure both smooth ventilation and reliability after closing. The whole valve has a small opening pressure and a compact structure, and has good reverse sealing performance under high temperature environment, and can be suitable for various industrial gas environments such as argon and natural gas.

[0024] In the preferred embodiment of the present application, Figure 1 As shown, in order to ensure the reliability of the unidirectional flow of the airflow, the switch assembly 30 includes a sealing end 31 and an elastic member 32, one end of the elastic member 32 abuts against the outlet valve body 20, and the other end of the elastic member 32 is relatively arranged and received at the end of the sealing end 31 away from the inlet valve body 10, and the sealing end is arranged to be retractably compressed by the elastic member 32 and the outlet valve body 20. Preferably, at least two stepped cavities with different inner diameters and coaxial lines are processed inside the outlet valve body 20, and the sealing end 31 is movably received in the internal cavity of the outlet valve body 20, and can resist the sealing arrangement relative to the inlet valve body 10. Therefore, by arranging cavities with different inner diameters inside the outlet valve body 20, and accommodating and limiting the sealing end in cavities with different inner diameters, it can be ensured that the sealing end 31 can stably run along a preset trajectory.

[0025] Specifically, the sealing end 31 is processed with an open internal cavity at one end away from the inlet valve body 10, and the elastic member 32 is a spring that abuts against the internal cavity of the sealing end 31 and the other end of the spring abuts against the inner cavity of the outlet valve body 20, and the elastic member 32 is coaxial with the sealing end 31. Thus, it is ensured that the sealing end 31 can smoothly reciprocate along its axis under the action of the pressure difference.

[0026] Optionally, in order to improve the sealing between the inlet valve body 10 and the switch assembly 30 , the end side surface of the sealing end 31 close to the inlet valve body 10 is processed into an outwardly convex spherical arc surface.

[0027] Preferably, the switch assembly 30 further comprises a cone sleeve 33 adapted to the sealing end 31, and the cone sleeve 33 is arranged and embedded in the outlet valve body 20, and is located at one end of the inlet valve body 10 close to the sealing end 31. Thus, the cone sleeve 33 can ensure convenient sealing with the sealing end 31, and further improve the sealing performance between the switch assembly 30 and the inlet valve body 10. Optionally, in order to better improve the sealing performance of the gas, especially the high-temperature gas, the inner cavity of the contact end of the cone sleeve 33 and the sealing end 31 is processed into a concave arc surface, thereby, the concave arc surface can be processed to better contact the spherical arc surface of the sealing end 31, and the effective sealing area is significantly increased, which ensures the reliability of airtightness and improves the flexibility of contact sealing. With the help of the arc surface, the fault tolerance of the sealing surface is improved, and the sealing of the sealing end 31 to the inlet valve body 10 can be achieved more efficiently and stably.

[0028] Optionally, the through holes 311 are at least 2 and are evenly distributed along the spherical arc surface of the sealing end 31. By processing the through holes 311 into multiple holes, it is ensured that the gas from the inlet valve body 10 is subjected to uniform force when it breaks through the sealing end 31 under pressure and enters the outlet valve body 20 through the through holes 311, which can effectively reduce the resistance in the flow process and eliminate the vibration caused by the uneven force of the spring during the flow process, thereby ensuring the stability of the entire one-way valve body during the operation process, thereby avoiding the reliability and stability defects of the sealing due to the instability of the one-way valve body in the prior art caused by the sphere under pressure during the compression of the spring, expanding the use conditions of the one-way valve provided by the present invention, and being able to meet the use requirements of multiple directions. Furthermore, in another preferred embodiment of the present invention, the through holes 311 are 6 and are evenly distributed along the spherical arc surface of the sealing end 31, further improving the smoothness and stability of the high-pressure airflow after flowing through the through holes, and avoiding the deviation of the spring compression process caused by uneven acceptance.

[0029] In summary, the switch assembly provided by the present invention has an elastic member that is a spring, and the sealing end is coaxially arranged, thereby ensuring that the sealing end can smoothly reciprocate along its axial direction under the action of the pressure difference; the tapered sleeve can ensure convenient sealing with the sealing end, further improving the sealing between the switch assembly and the inlet valve body. By processing the concave arc surface, the area of ​​contact with the spherical arc surface of the sealing end can be larger, and the effective sealing area is significantly increased, ensuring the reliability of airtightness, and also improving the flexibility of contact sealing. With the help of the arc surface, the fault tolerance of the sealing surface is improved, and the sealing of the sealing end to the inlet valve body can be achieved more efficiently and stably.

[0030] In a preferred embodiment of the utility model, in order to ensure the stability and sealing of the connection of the inlet valve body 10, an inlet joint 40 connected to the inlet valve body 10 is also included, and the inlet joint 40 is located at the end side of the inlet valve body 10 away from the outlet valve body 20, and is detachably connected to the inlet valve body 10. Specifically, an inlet nut 41 is also included, which is sleeved on the inlet joint 40 and detachably fastened to the inlet valve body 10. Further, in order to increase the sealing contact area between the inlet joint 40 and the inlet valve body 10 and ensure the reliability of the seal, the inner surface of the end side of the inlet valve body 10 in contact with the inlet joint 40 is processed into a concave arc surface. Preferably, the single-sided outer peripheral surface of the inlet joint 40 in contact with the inlet valve body 10 is processed into a convex spherical arc surface.

[0031] Optionally, the inlet joint 40 is processed with a protruding step on the outer peripheral side surface close to the inlet valve body 10, and after the inlet valve body 10 is sleeved on the inlet joint 40, the inlet valve body 10 is detachably fastened to the inlet valve body 10 through the step processed on the inlet valve body 10.

[0032] Based on the same purpose, it also includes an outlet joint 50 connected to the outlet valve body 20, and the outlet joint 50 is located at the end side away from the outlet valve body 20 and is detachably connected to the outlet valve body 20. Specifically, it also includes an outlet nut 51 that is sleeved on the outlet joint 50 and is detachably fastened to the outlet valve body 20. Further, in order to increase the sealing contact area between the outlet joint 50 and the outlet valve body 20 and ensure the reliability of the seal, the inner surface of the end side of the outlet valve body 20 that contacts the outlet joint 50 is processed into a concave arc surface. Preferably, the single-side outer peripheral surface of the outlet joint 50 that contacts the outlet valve body 20 is processed into a convex spherical arc surface.

[0033] Optionally, the outlet connector 50 is processed with a protruding step on the outer peripheral side surface close to the outlet valve body 20 , and after the outlet valve body 20 is sleeved on the outlet connector 50 , the outlet valve body 20 is detachably fastened to the outlet valve body 20 through the step processed on the outlet valve body 20 .

[0034] In addition, the inlet nut 41 is connected to the inlet valve body 10 through threads, and by tightening the inlet, the end face seal between the inlet joint 40 and the inlet valve body 10 is ensured to be more reliable.

[0035] In addition, the outlet nut 51 is connected to the outlet valve body 20 via threads, and by tightening the inlet, a more reliable end face seal between the outlet joint 50 and the outlet valve body 20 is ensured.

[0036] The high temperature one-way valve provided in the above embodiment of the present application has at least the following characteristics:

[0037] The high-temperature one-way valve provided in the embodiment of the present application can ensure that the sealing end can stably run along a preset trajectory by setting a cavity with different inner diameters inside the outlet valve body and accommodating and restricting the sealing end in the cavity with different inner diameters; by setting the elastic member as a spring and setting the sealing end coaxially, it is ensured that the sealing end can smoothly reciprocate along its axial direction under the action of the pressure difference; the tapered sleeve can ensure convenient sealing with the sealing end, further improving the sealing between the switch assembly and the inlet valve body. By processing the concave arc surface, the contact area with the arc surface of the spherical body at the sealing end can be larger, and the effective sealing area is significantly increased, which ensures the reliability of airtightness and improves the flexibility of contact sealing. The fault tolerance of the sealing surface is improved with the help of the arc surface, and the sealing end can be sealed to the inlet valve body more efficiently and stably; by setting a plurality of through holes, the resistance in the flow process can be effectively reduced, and the vibration caused by the uneven force of the spring in the flow process can be eliminated, thereby ensuring the stability of the entire one-way valve body during operation, thereby overcoming the limitation that the one-way valve suitable for high-temperature gas in the prior art can only be installed vertically or horizontally, and expanding the use conditions of the one-way valve provided by the present invention, which can meet multi-directional use requirements; it realizes the one-way flow of airflow, and can flexibly control the switching between ventilation and air cut-off, which can ensure both smooth ventilation and reliability after closure. The whole valve has a small opening pressure and a compact structure, and has good reverse sealing performance under high temperature environment, and can be suitable for various industrial gas environments such as argon and natural gas.

[0038] The above description is only a specific implementation mode of the present utility model. The technical features of the above-mentioned embodiments can be arbitrarily combined. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high temperature one-way valve, characterized in that: The invention comprises an inlet valve body (10), an outlet valve body (20) and a switch assembly (30), wherein the inlet valve body (10) is detachably connected to the outlet valve body (20), the switch assembly (30) is arranged between the inlet valve body (10) and the outlet valve body (20), one end of the switch assembly (30) is provided with a sealing arrangement capable of contacting the inlet valve body (10), and the other end of the switch assembly (30) is provided with a compressible arrangement capable of contacting the outlet valve body (20), and the switch assembly (30) is provided with a through hole (311) for facilitating the passage of gas, and the through hole (311) is provided in communication with the outlet valve body (20).

2. The high temperature one-way valve according to claim 1, characterized in that: The switch assembly (30) comprises a sealing end (31) and an elastic member (32); one end of the elastic member (32) abuts against the outlet valve body (20), and the other end arranged oppositely is received at the end of the sealing end (31) away from the inlet valve body (10); the sealing end is arranged to be retractably compressed by the elastic member (32) and the outlet valve body (20).

3. The high temperature one-way valve according to claim 2, characterized in that: The outlet valve body (20) is internally processed with at least two coaxial stepped cavities with different inner diameters, and the sealing end (31) is movably received in the internal cavity of the outlet valve body (20) and can resist the sealing arrangement relative to the inlet valve body (10).

4. The high temperature one-way valve according to claim 2 or 3, characterized in that: An open internal cavity is processed at one end of the sealing end (31) away from the inlet valve body (10), and the elastic member (32) is a spring that abuts against the internal cavity of the sealing end (31) and the other end of the spring abuts against the inner cavity of the outlet valve body (20), and the elastic member (32) and the sealing end (31) are coaxially arranged.

5. The high temperature one-way valve according to claim 4, characterized in that: The end side surface of the sealing end (31) close to the inlet valve body (10) is processed into an outwardly convex spherical arc surface.

6. The high temperature one-way valve according to claim 4, characterized in that: The switch assembly (30) further comprises a cone sleeve (33) adapted to the sealing end (31); the cone sleeve (33) is arranged and embedded in the interior of the outlet valve body (20) and is located at one end of the inlet valve body (10) close to the sealing end (31).

7. The high temperature one-way valve according to claim 6, characterized in that: The inner cavity of the contact end of the cone sleeve (33) and the sealing end (31) is processed into a concave arc surface.

8. The high temperature one-way valve according to claim 5, characterized in that: There are at least two through holes (311) which are evenly distributed along the spherical arc surface of the sealing end (31).

9. The high temperature one-way valve according to claim 1, characterized in that: It also comprises an inlet joint (40) which is arranged in communication with the inlet valve body (10); the inlet joint (40) is located at the end side of the inlet valve body (10) away from the outlet valve body (20) and is detachably connected to the inlet valve body (10).

10. The high temperature one-way valve according to claim 2, characterized in that: It also comprises an outlet joint (50) which is arranged in communication with the outlet valve body (20); the outlet joint (50) is located at the end side away from the outlet valve body (20) and is detachably connected to the outlet valve body (20).

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