Pull type safety valve and fluid system

Abstract

The invention belongs to the technical field of fluid control, and particularly discloses a pull-type safety valve and a fluid system.The pull-type safety valve comprises a valve body with an inner cavity, and the valve body is provided with a main valve port and a pressure relief port which communicate with the inner cavity; the flexible sealing piece is arranged in the inner cavity and used for achieving disconnection and communication of the main valve port and the pressure relief port. The adjusting part is used for adjusting the flexible sealing part in the axial direction of the valve body, the adjusting part is connected with the flexible sealing part and can move between a first position and a second position in the axial direction of the inner cavity, when the adjusting part is located at the first position, the flexible sealing part cuts off the main valve port and the pressure relief port, and when the adjusting part moves from the first position to the second position, the main valve port and the pressure relief port are closed. The main valve port and the pressure relief port are disconnected by the flexible sealing piece, so that the main valve port is communicated with the pressure relief port; the elastic piece elastically abuts against the adjusting piece and the valve body, so that the adjusting piece can return to the first position after moving towards the second position. The safety valve is provided with few accessories and has the advantages that faults are not prone to occurring, and interference pressure is not prone to being generated.

Description

Technical Field

[0001] The present application belongs to the field of fluid control technology, and more specifically, relates to a pull-type safety valve and a fluid system. Background Art

[0002] A safety valve is a safety device used to protect equipment or systems. When the medium pressure exceeds the set value, the safety valve opens to release the pressure, ensuring the safe operation of the equipment or system and the safety of personnel.

[0003] In the related art, the safety valve is assembled from a variety of accessories; to facilitate the operation of the safety valve, the valve body of the safety valve is often equipped with a rotatable handle; by turning the knob handle, the inclined platform on the handle lifts the sealing seat in the valve body, thereby realizing active pressure relief of the safety valve.

[0004] However, when using a safety valve with a handle, wear on the handle or ramp increases friction, risking the handle from getting stuck and causing the valve to malfunction. Furthermore, safety valves often require a rotation stop for the sealing seat to prevent it from rotating when lifted by the ramp. This increases friction on the sealing seat, affecting the pressure relief. This makes handle-adjustable safety valves not only prone to malfunction, but also requires numerous accessories and is prone to interference pressure. Summary of the Invention

[0005] In response to the defects or improvement needs of the existing technology, the present application provides a pull-type safety valve and a fluid system, aiming to improve the problems of the safety valve being prone to failure, having numerous accessories and easily generating interference pressure.

[0006] The first aspect of the present application provides a pull-type safety valve adopting the following technical solution:

[0007] A pull-type safety valve, comprising:

[0008] A valve body with an inner cavity, the valve body having a main valve port and a pressure relief port communicating with the inner cavity;

[0009] a flexible sealing member disposed in the inner cavity, for cutting off the main valve port and the pressure relief port when pressure relief is not required, and for opening the main valve port so that the main valve port and the pressure relief port are in communication when pressure relief is required;

[0010] An adjusting member is arranged to adjust the flexible sealing member along the axial direction of the valve body, and the adjusting member is connected with the flexible sealing member and is movable between a first position and a second position along the axial direction of the inner cavity. When the adjusting member is located at the first position, the flexible sealing member cuts off the main valve port and the pressure relief port. When the adjusting member moves from the first position to the second position, the flexible sealing member removes the cut-off between the main valve port and the pressure relief port, and the main valve port and the pressure relief port are connected.

[0011] An elastic member is arranged to elastically abut against the adjusting member and the valve body, so that the adjusting member can return to the first position after moving to the second position.

[0012] Compared with the prior art, the adjusting member of the above technical scheme is always arranged to pass through the valve body, and when pressure relief is needed, the user can pull the adjusting member along the axial direction, so that the adjusting member is quickly adjusted to the second position, the main valve port and the pressure relief port are connected, and the pressure relief of the safety valve is realized. Since the safety valve of the scheme adopts a pulling type structure, the inclined table and the rotation stopping structure and other accessories in the handle knob type safety valve are omitted. Compared with the handle knob type safety valve, the safety valve is not prone to failure, and the accessories are less likely to interfere with the pressure.

[0013] As a further preferred, the flexible sealing member comprises: a sealing portion for cutting off the main valve port and the pressure relief port, a first flange portion for forming a connection with the valve body, and a flexible connection portion for connecting the sealing portion and the first flange portion.

[0014] As a further preferred, the inner wall of the main valve port is formed with a first protrusion in the circumferential direction, and the first protrusion is located between the main valve port and the pressure relief port. When the adjusting member is located at the first position, the first protrusion and the sealing portion form an abutting seal to cut off the main valve port and the pressure relief port.

[0015] As a further preferred, the end surface of the sealing portion is provided with a first groove, and when the adjusting member is located at the first position, the first protrusion is abutted into the first groove.

[0016] As a further preferred, the adjusting member is adapted to be coupled to the flexible connection portion.

[0017] As a further preferred, the first flange portion is sealingly connected with the valve body in the circumferential direction along the inner wall of the valve body.

[0018] As a further preferred, the valve body comprises a main body and a valve cover, the main body has a mounting port for mounting the adjusting member and the flexible sealing member; the valve cover is detachably connected with the main body at the mounting port and can confine the adjusting member and the flexible sealing member in the valve cover and the main body.

[0019] As a further preferred, when the main body and the valve cover are connected with each other, a clamping cavity for clamping the first flange portion is formed at the joint of the main body and the valve cover.

[0020] As a further preferred, a locking protrusion is arranged at the inner wall of the clamping cavity, the locking protrusion prevents the first flange portion from being separated from the clamping cavity when the first flange portion is clamped.

[0021] As a further preferred, the adjusting member is provided with a handle portion, the handle portion always penetrates out of the valve body.

[0022] The second aspect of the present application provides a fluid system adopting the following technical scheme:

[0023] A fluid system comprises any one of the pull-type safety valve of the first aspect.

[0024] Overall, compared with the prior art, the above technical scheme conceived by the present application mainly has the following technical advantages:

[0025] 1. When pressure relief is needed, the user can pull the adjusting member in the axial direction, so that the adjusting member is quickly adjusted to the second position, realizing the communication between the main valve port and the pressure relief port, i.e. the pressure relief of the safety valve; this design omits the inclined table and the rotation-stopping structure and other accessories in the handle knob type safety valve on the basis of guaranteeing the original pressure relief function of the safety valve, so that the safety valve of the present design is not only less likely to fail, but also has fewer accessories and is less likely to interfere with the pressure.

[0026] 2. The flexible sealing member is composed of a sealing portion, a first flange portion and a flexible connecting portion, which not only can realize the on-off adjustment between the main valve port and the pressure relief port, but also can separate the inner cavity of the valve body, so that other functional components (such as the adjusting member and the elastic member) in the safety valve remain independent of the main valve port and the pressure relief port, to avoid the erosion of the medium in the safety valve to the built-in functional elements of the safety valve, thereby effectively prolonging the service life of the safety valve.

[0027] 3. By disassembling the main body and the valve cover, the installation or replacement of the adjusting member, the elastic member and the flexible sealing member can be realized, so that the assembly operation of the safety valve is convenient, and the internal components of the valve body are easy to replace. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1is a schematic diagram of an overall structure of a pull-type safety valve provided by an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of a sectional structure of the pull-type safety valve when an adjusting member is in a first position, provided by an embodiment of the present application;

[0030] Figure 3 is a schematic diagram of a sectional structure of the pull-type safety valve when the adjusting member is in a second position, provided by an embodiment of the present application;

[0031] Figure 4 is an exploded view of the pull-type safety valve, provided by an embodiment of the present application;

[0032] Figure 5 is a schematic diagram of a sectional structure of a flexible sealing member, provided by an embodiment of the present application;

[0033] Figure 6 is Figure 3 is an enlarged view of A in FIG. 6;

[0034] Figure 7 is a schematic diagram of a sectional structure of an adjusting member, provided by an embodiment of the present application;

[0035] Figure 8 is a sectional view showing a cover body part of a valve cover and an adjusting part, provided by an embodiment of the present application. In all the drawings, the same reference signs are used to indicate the same elements or structures, wherein:

[0036] 1, valve body; 1-1, main body; 1-2, valve cover; 1-21, cover body part; 1-22, adjusting part; 2, adjusting member; 2-1, rod part; 2-2, end head part; 2-3, second flange part; 2-4, handle part; 3, flexible sealing member; 3-1, sealing part; 3-2, flexible connecting part; 3-3, first flange part; 4, elastic member; 5, first protrusion; 6, second protrusion; 7, external connection structure; 10, main valve port; 20, pressure relief port; 30, mounting port; 40, through hole; 50, first groove; 60, second groove; 70, sink groove. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0038] The present application is further described below with reference to the drawings and embodiments. Figures 1-8 The present application is further described below with reference to the drawings and embodiments.

[0039] An embodiment of the present application discloses a pull-type safety valve. With reference to Figures 1-3The pull type safety valve comprises a valve body 1, an adjusting member 2, a flexible sealing member 3 and an elastic member 4. The valve body 1 is provided with an inner cavity, and the valve body 1 is provided with a main valve port 10 and a pressure relief port 20 which are communicated with the inner cavity. The flexible sealing member 3 is arranged in the inner cavity, and the flexible sealing member 3 is used to cut off the main valve port 10 and the pressure relief port 20 when pressure relief is not needed, and the flexible sealing member 3 is used to open the main valve port 10 to make the main valve port 10 and the pressure relief port 20 communicated when pressure relief is needed. The adjusting member 2 is used to adjust the flexible sealing member 3 along the axial direction of the valve body 1, and the adjusting member 2 is connected with the flexible sealing member 3 and can move between a first position and a second position in the axial direction of the inner cavity. When the adjusting member 2 is located at the first position, the flexible sealing member 3 cuts off the main valve port 10 and the pressure relief port 20. When the adjusting member 2 moves from the first position to the second position, the flexible sealing member 3 removes the cut-off between the main valve port 10 and the pressure relief port 20 to make the main valve port 10 and the pressure relief port 20 communicated. The elastic member 4 elastically abuts against the adjusting member 2 and the valve body 1 to make the adjusting member 2 return to the first position after moving to the second position.

[0040] Further, referring to Figures 2-4 For the convenience of assembling the safety valve, the valve body 1 in the safety valve comprises a main body 1-1 and a valve cover 1-2. The related pressure relief port 20 and the main valve port 10 are arranged on the main body 1-1, and the main body 1-1 is further provided with a mounting port 30 for mounting the adjusting member 2 and the flexible sealing member 3. The valve cover 1-2 is located at the mounting port 30 and is detachably connected with the main body 1-1, and the valve cover 1-2 is further provided with a through hole 40 for the one end of the adjusting member 2 to pass through. After the valve cover 1-2 is assembled on the main body 1-1, the adjusting member 2 and the flexible sealing member 3 are limited in the valve cover 1-2 and the main body 1-1, and are combined together to form a stable safety valve.

[0041] It should be noted that the assembly mode between the main body 1-1 and the valve cover 1-2 includes but is not limited to threaded mounting, screw mounting, buckle mounting and the like. For the convenience of understanding, Figure 2 A threaded mounting mode is shown to realize the detachable mounting of the main body 1-1 and the valve cover 1-2.

[0042] Further, as shown in Figures 2-3 The main body 1-1 is provided with a first protrusion 5 which is formed at the inner wall of the main valve port 10 and protrudes in the circumferential direction. The first protrusion 5 is located between the main valve port 10 and the pressure relief port 20. When the adjusting member 2 is located at the first position, the first protrusion 5 abuts against the adjusting member 2 to realize the cut-off of the main valve port 10 and the pressure relief port 20. When the adjusting member 2 is located at the second position, the first protrusion 5 is separated from the adjusting member 2 to realize the communication between the main valve port 10 and the pressure relief port 20.

[0043] It should be noted that the abutting seal between the first protrusion 5 and the adjusting member 2 can be an end face seal or a circumferential seal.

[0044] Further, as shown in Figure 5 , the flexible seal 3 comprises a sealing part 3-1, a flexible connecting part 3-2 and a first flange part 3-3 connected in sequence, the sealing part 3-1 is used to cut off the main valve port 10 and the pressure relief port 20, the first flange part 3-3 is used to form a connection with the valve body 1, and the flexible connecting part 3-2 can be bent during use.

[0045] When the sealing part 3-1 and the first protrusion 5 adopt a face seal form, a boss is arranged at the center of the end face of the sealing part 3-1 away from the adjusting part 2, and a first groove 50 is arranged on the end face of the sealing part 3-1. The first groove 50 is preferably an annular groove, and the annular groove is centered on the boss. When the adjusting part 2 is in the first position, the first protrusion 5 is in contact with the first groove 50 to form a stable face seal.

[0046] Further, when the main body 1-1 and the valve cover 1-2 are connected to each other, a clamping cavity for clamping the first flange part 3-3 of the flexible seal 3 is formed at the joint of the main body 1-1 and the valve cover 1-2. When the main body 1-1 and the valve cover 1-2 are assembled and locked, the main body 1-1 and the valve cover 1-2 clamp the first flange part 3-3 of the flexible seal 3 to realize the connection of the main body 1-1, the valve cover 1-2 and the flexible seal 3.

[0047] Further, as shown in Figure 6 , a locking protrusion 70 is arranged in the clamping cavity, the locking protrusion 70 is preferably an annular protrusion, and the locking protrusion 70 is preferably integrally formed at the inner stepped surface edge of the main body 1-1. In addition, a groove corresponding to the locking protrusion 70 is arranged on the surface of the first flange part 3-3. When the first flange part 3-3 is clamped, the locking protrusion 70 and the first flange 3-3 are engaged with each other to prevent the first flange part 3-3 from being separated from the clamping cavity.

[0048] In addition, under this design, when the main body 1-1 and the valve cover 1-2 are connected to each other, the first flange part 3-3 is sealed and connected to the valve body 1 along the circumferential wall of the valve body 1, so that other functional components (such as the adjusting part 2 and the elastic part 4) in the safety valve are independent and separated from the main valve port 10 and the pressure relief port 20, so as to avoid the erosion of the medium in the safety valve to the built-in functional elements of the safety valve, which effectively prolongs the service life of the safety valve.

[0049] It should be noted that in other embodiments, the flexible seal 3 and the valve body 1 can be connected by thread connection or other detachable connection modes.

[0050] Further, as shown in Figure 7As shown, the adjusting member 2 comprises a stem portion 2-1, a head portion 2-2, a second flange portion 2-3 and a handle portion 2-4. The stem portion 2-1 is arranged along the axial direction of the valve body 1, and is integrally connected with the head portion 2-2 at one end close to the main valve port 10, and is integrally connected with the handle portion 2-4 at the other end. In addition, the second flange portion 2-3 is connected to the circumferential edge of the head portion 2-2 and extends away from the main valve port 10, so that the second flange portion 2-3, the head portion 2-2 and the stem portion 2-1 can form a containing cavity for containing the elastic member 4. In addition, the circumferential surface of the handle portion 2-4 is provided with a third groove for facilitating the user to pull the handle portion 2-4. In other embodiments, the third groove can also be replaced by a thread, a protrusion, a stripe or the like structure. It should be noted that when the safety valve is assembled, the handle portion 2-4 always penetrates through the valve body 1.

[0051] Further, the adjusting member 2 is adapted to be coupled to the flexible connecting portion 3-2. As preferred, the circumferential surface of one of the adjusting member 2 and the flexible connecting portion 3-2 is provided with a second protrusion 6, and the other of the adjusting member 2 and the flexible connecting portion 3-2 is provided with a second groove 60 for embedding the second protrusion 6.

[0052] As preferred, the second groove 60 is opened in the circumferential direction of the head portion 2-2 of the adjusting member 2, and the second protrusion 6 is protruded inside the flexible connecting portion 3-2 of the flexible sealing member 3.

[0053] It should be noted that when assembling the safety valve, the flexible sealing member 3 is first installed into the main body 1-1 through the installation port 30 of the main body 1-1, and then the adjusting member 2 is installed into the main body 1-1 through the installation port 30, so that the second groove 60 on the adjusting member 2 and the second protrusion 6 between the flexible sealing member 3 form an assembly relationship. Then the elastic member 4 is installed, so that the elastic member 4 abuts against the adjusting member 2; and then the valve cover 1-2 is threadedly assembled to the main body 1-1, so that the first flange portion 3-3 of the flexible sealing member 3 is tightly locked at the joint of the main body 1-1 and the valve cover 1-2, and so that the end of the elastic member 4 away from the flexible sealing member 3 abuts against the inner wall of the valve cover 1-2, and so that the handle portion 2-4 in the adjusting member 2 is located outside the valve cover 1-2, thereby completing the assembly. When the user needs to actively release the pressure of the safety valve, only needs to pull the handle portion 2-4 of the adjusting member 2 along the axial direction, so as to achieve active pressure release.

[0054] Further, in order to facilitate the installation of the safety valve into the fluid system, such as Figure 1 As shown, the valve body 1 is provided with a ring groove in the circumferential direction at the outer end of the main valve port 10, and a plurality of ring grooves are arranged along the axial direction of the valve body 1. In addition, the valve body 1 is provided with an external connecting structure 7 at the outer end of the pressure relief port 20 for connecting an external extension member.

[0055] In the embodiment, the external connection structure 7 is an external thread arranged on the outer periphery of the valve body 1. In other embodiments, the external connection structure 7 can be a flange or other connection structure capable of forming a connection relationship between the valve body 1 and an external structure.

[0056] It should be noted that in some embodiments, some components of the pull-type safety valve can be made of plastic, brass or other materials. For example, the valve body 1 can be made of brass or plastic, and the adjusting component 2 can be made of plastic.

[0057] In addition, as shown in Figure 8 In some other embodiments, the valve cover 1-2 in the valve body 1 includes a cover body part 1-21 and an adjusting part 1-22. A threaded hole is arranged at the center of the end face of the cover body part 1-21. The adjusting part 1-22 is threadedly connected to the cover body part 1-21 along the threaded hole, and the adjusting part 1-22 can be axially displaced on the cover body part 1-21.

[0058] In addition, the through hole 40 in the valve cover 1-2 is located on the adjusting part 1-22, and the adjusting component 2 and the elastic component 4 are in contact with the adjusting part 1-22. During use, the user can adjust the position of the adjusting part 1-22 by screwing to adjust the compression degree of the elastic component 4, so as to actively control the pressure relief threshold of the safety valve.

[0059] The embodiments of the present application also disclose a fluid system, which includes any one of the pull-type safety valves described above.

[0060] Specifically, the fluid system can be a boiler system (such as a wall-hanging stove system), an oil and gas pipeline system, a water treatment system, etc. For example, when the fluid system is a wall-hanging stove system, the wall-hanging stove system includes a wall-hanging stove main body, a hot water circulation module, a control module, a hot water circulation pump, and a pull-type safety valve, etc. In this system, the pull-type safety valve is preferably installed on the high-pressure side of the system, and is used to release pressure when the system pressure is too high, so as to protect the system from damage.

[0061] It should be understood that the expressions such as "include" and "may include" used in the present application represent the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In the present application, terms such as "include" and / or "have" can be interpreted to represent a specific feature, number, operation, constituent element, component or combination thereof, but cannot be interpreted to exclude the existence or addition of one or more other features, numbers, operations, constituent elements, components or combinations thereof.

[0062] It should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0063] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0064] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] Those skilled in the art can understand that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pull-to-open safety valve, characterized in that The utility model relates to a valve, comprising: a valve body (1) with an inner cavity, the valve body (1) has a main valve port (10) and a pressure relief port (20) which communicate with the inner cavity; a flexible seal (3) arranged in the inner cavity, used to cut off the main valve port (10) and the pressure relief port (20) when pressure relief is not needed, and open the main valve port (10) to make the main valve port (10) communicate with the pressure relief port (20) when pressure relief is needed; an adjusting member (2) used to adjust the flexible seal (3) along the axial direction of the valve body (1), the adjusting member (2) is connected with the flexible seal (3) and can move between a first position and a second position in the axial direction of the inner cavity, when the adjusting member (2) is at the first position, the flexible seal (3) cuts off the main valve port (10) and the pressure relief port (20), when the adjusting member (2) moves from the first position to the second position, the flexible seal (3) removes the cut-off between the main valve port (10) and the pressure relief port (20) to make the main valve port (10) and the pressure relief port (20) communicate; a resilient member (4) which elastically abuts against the adjusting member (2) and the valve body (1) to make the adjusting member (2) return to the first position after moving to the second position.

2. The pull safety valve of claim 1, wherein, The flexible seal (3) comprises a sealing part (3-1) used to cut off the main valve port (10) and the pressure relief port (20), a first flange part (3-3) used to form a connection with the valve body (1), and a flexible connecting part (3-2) used to connect the sealing part (3-1) and the first flange part (3-3).

3. The pull safety valve of claim 2, wherein, A first protrusion (5) is formed on the inner wall of the main valve port (10) and protrudes in the circumferential direction, the first protrusion (5) is located between the main valve port (10) and the pressure relief port (20), and when the adjusting member (2) is at the first position, the first protrusion (5) forms an abutting seal with the sealing part (3-1) to cut off the main valve port (10) and the pressure relief port (20).

4. The pull safety valve of claim 3, wherein, A first groove (50) is arranged on the end face of the sealing part (3-1), and when the adjusting member (2) is at the first position, the first protrusion (5) abuts into the first groove (50).

5. The pull safety valve of claim 2, wherein, The adjusting member (2) is adapted to be coupled to the flexible connecting part (3-2).

6. The pull safety valve of claim 2, wherein, The first flange part (3-3) is in sealing connection with the valve body (1) in the circumferential direction of the inner wall of the valve body (1).

7. The pull safety valve of claim 2, wherein, The valve body (1) comprises a main body (1-1) and a valve cover (1-2), the main body (1-1) has a mounting port (30) used to mount the adjusting member (2) and the flexible seal (3); The valve cover (1-2) is detachably connected with the main body (1-1) at the mounting port (30) and can limit the adjusting member (2) and the flexible seal (3) in the valve cover (1-2) and the main body (1-1).

8. The pull safety valve of claim 7, wherein, When the main body (1-1) and the bonnet (1-2) are connected to each other, a clamping cavity for clamping the first flange portion (3-3) is formed at the joint of the main body (1-1) and the bonnet (1-2).

9. The pull safety valve of claim 8, wherein, A locking protrusion is arranged at the inner wall of the clamping cavity, and when the first flange portion (3-3) is clamped, the locking protrusion prevents the first flange portion (3-3) from being separated from the clamping cavity.

10. A pull type safety valve according to any one of claims 1 to 9, wherein The adjusting member (2) is provided with a handle portion (2-4) which always penetrates out of the valve body (1).

11. A fluid system characterized by, A pull-type safety valve comprising the valve body (1) as claimed in any one of claims 1-10.

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