Control valve and valve body core assembly therefor

Abstract

A control valve comprises a valve body (10), a valve body core (20), a valve stem (30) and a valve flap (40). The valve body has a valve cavity (11) and an installation port (12) connected to the valve cavity (11). The valve body core is detachably inserted into the valve body through the installation port and divides the valve cavity into a first channel (111) and a second channel (112). The valve body core comprises a valve seat portion (22), and the valve seat portion has a shut-off port (223) connected to the first channel and the second channel. The valve stem is movably inserted into the valve body core from the installation port. The valve flap is connected to one end of the valve stem and can abut against the valve seat portion to close the shut-off port under the drive of the valve stem. The control valve can facilitate the maintenance of the pipeline. In addition, a valve body core assembly for the control valve is also provided.

Description

Technical Field

[0001] The present invention relates to a control valve, and more particularly to a control valve facilitating pipeline maintenance and a valve body core assembly for the control valve. Background Art

[0002] A control valve is used to change the flow rate of a medium in a pipeline. The control valve drives a valve flap to move through a valve stem to change the effective flow area between the valve core and the valve seat of the control valve. After long-term use, the part where the valve seat and the valve flap cooperate wears, affecting the cut-off effect of the control valve. In the existing control valve, the valve seat protrudes and is formed on the inner wall of the valve body. When it wears, the entire valve seat needs to be replaced, which is not convenient for pipeline maintenance. Summary of the Invention

[0003] The object of the present invention is to provide a control valve that is convenient for pipeline maintenance, especially when the valve seat of the control valve wears, it is convenient for pipeline maintenance. Another object of the present invention is to provide a valve body core assembly for a control valve, which can facilitate pipeline maintenance.

[0004] The present invention provides a control valve, which includes a valve body, a valve body core, a valve stem, and a valve flap. The valve body has a valve cavity and an installation port communicating with the valve cavity. The valve body core is detachably inserted into the valve body through the installation port and divides the valve cavity into a first channel and a second channel. The valve body core includes a valve seat portion, and the valve seat portion has a throttling port communicating the first channel and the second channel. The valve stem is movably inserted into the valve body core through the installation port. One end of the valve flap is connected to the valve stem and can abut against the valve seat portion under the drive of the valve stem to close the throttling port.

[0005] The valve seat portion of the valve body core of the control valve cooperates with the valve flap to cut off the fluid flowing through the throttling port, and the entire valve body core can be removed from the valve body. When the valve seat portion wears, the entire valve body core can be directly removed from the installation port and replaced with a new valve body core. This replacement does not require disconnecting the connection between the valve body and the adjacent pipeline, thereby facilitating pipeline maintenance.

[0006] In another illustrative embodiment of the control valve, the valve body core has a longitudinal axis parallel to its insertion direction and a transverse axis perpendicular to the longitudinal axis. The valve body core also has a first circumferential direction and a second circumferential direction. The axis of the first circumferential direction is the longitudinal axis, and the axis of the second circumferential direction is the transverse axis. The valve body core is inserted into the valve body such that the valve body surrounds the part of the valve body core inserted into the valve cavity along the second circumferential direction, thereby separating the first channel and the second channel. This helps to simplify the structure of the valve body.

[0007] In yet another schematic embodiment of the control valve, the control valve further includes a strip-shaped seal, which is wound around the part of the valve body core inserted into the valve cavity along the second circumferential direction, and is pressed between the valve body core and the inner surface of the valve cavity to seal and isolate the first channel and the second channel, thereby improving the sealing performance of the control valve.

[0008] In yet another schematic embodiment of the control valve, the valve body core further includes a limiting ridge, which is arranged on the outer surface of the valve body core along the second circumferential direction. A limiting groove capable of being inserted and matched with the limiting ridge is formed on the inner surface of the valve body. The strip-shaped seal is pressed between the limiting ridge and the groove wall of the limiting groove. Thereby, the valve body core can be prevented from rotating relative to the valve body during use.

[0009] In yet another schematic embodiment of the control valve, the control valve further includes an annular seal, which is sleeved on the valve body core along the first circumferential direction and fits the inner surface of the valve body at the installation port. The two ends of the strip-shaped seal are respectively connected to the two radially opposite sides of the annular seal. To prevent the fluid in the valve cavity from leaking through the gap between the installation port and the valve body core.

[0010] In yet another schematic embodiment of the control valve, the strip-shaped seal and the annular seal are integrally formed, and the plane where the annular seal is located is perpendicular to the plane where the strip-shaped seal is located. Thereby, the strip-shaped seal and the annular seal can be assembled on the valve body core as a whole to improve the stability.

[0011] In yet another schematic embodiment of the control valve, the valve body core protrudes to form an annular flange arranged along the first circumferential direction. The flange has a first abutting surface perpendicular to the longitudinal axis. The valve body has a second abutting surface arranged opposite to the first abutting surface. The annular seal is pressed between the first abutting surface and the second abutting surface. Through the clamping of the first abutting surface and the second abutting surface, the sealing effect of the annular seal can be improved.

[0012] In yet another schematic embodiment of the control valve, the valve body core has an inner cavity, and the valve seat portion divides the inner cavity into a first sub-cavity and a second sub-cavity along the longitudinal axis. The throttling port communicates the first sub-cavity and the second sub-cavity. The valve body core is open to form a first opening on the side of the first sub-cavity facing the first channel, and is open to form a second opening on the side of the second sub-cavity facing the second channel. This structure is beneficial to the stability of the valve body core.

[0013] In yet another schematic embodiment of the control valve, the valve body core includes a main body portion and an end portion. The main body portion extends along the longitudinal axis and is cylindrical. The end portion is hemispherical and is connected to one end of the main body portion on the longitudinal axis. The main body portion and the end portion jointly enclose the inner cavity. The end portion and a part of the main body portion are located in the valve cavity. Thereby, it is convenient for the assembly of the valve body and the valve body core.

[0014] In yet another illustrative embodiment of the control valve, the valve seat portion is provided at the connection between the main body portion and the end portion. The first subchamber is located in the main body portion, and the second subchamber is located in the end portion. This facilitates the machining of the valve body core.

[0015] In yet another illustrative embodiment of the control valve, the control valve further includes a fastener that is threadedly connected to the inner surface of the valve body at the mounting port and is capable of abutting against the valve body core to fix it to the valve body. This facilitates the fixing of the valve body core.

[0016] In yet another illustrative embodiment of the control valve, the valve stem connected to the valve flap can be inserted into the valve body core through an insertion port of the valve body core. The fastener can cover the insertion port. The valve stem is movably inserted through the fastener. Thus, when assembling the control valve, the valve flap and the valve stem can be fixed first, and then the whole can be inserted into the valve body core, which facilitates the assembly of the control valve.

[0017] In yet another illustrative embodiment of the control valve, the control valve further includes a flexible sealing sleeve that wraps around the valve flap and one end of the fastener covering the insertion port to seal and isolate the valve flap, the valve stem, and the fastener from the valve chamber. This can prevent the corrosion of the valve flap, the valve stem, and the fastener by the fluid.

[0018] In yet another illustrative embodiment of the control valve, the valve body core is integrally formed of a plastic material, which is convenient for machining.

[0019] The present invention also provides a valve body core assembly for a control valve, which includes a valve body core. The valve body core has a longitudinal axis and a transverse axis perpendicular to the longitudinal axis. The valve body core also has a first circumferential direction and a second circumferential direction. The axis of the first circumferential direction is the longitudinal axis, and the axis of the second circumferential direction is the transverse axis. The valve body core can be inserted into the valve chamber of the valve body of a control valve along its longitudinal axis, and its shape is adapted to be surrounded by the valve body along the second circumferential direction for the part inserted into the valve chamber, thereby separating the valve chamber into a first channel and a second channel. The valve body core has an inner cavity and includes a valve seat portion, a first opening, and a second opening. The valve seat portion is provided in the inner cavity and divides the inner cavity into a first subcavity and a second subcavity along the longitudinal axis. The valve seat portion has a throttling port communicating the first subcavity and the second subcavity. The first opening communicates with the first subcavity. The second opening communicates with the second subcavity. The first opening and the second opening are respectively located on opposite sides of the valve body core along the transverse axis.

[0020] The valve seat portion of the valve body core of the valve body core assembly can cooperate with the valve flap of the control valve to cut off the fluid flow through the throttling port, and the whole valve body core can be removed from the valve body. When the valve seat portion is worn, the whole valve body core can be directly removed from the valve body and replaced with a new valve body core. This replacement does not require disconnecting the connection between the valve body and the adjacent pipeline, thereby facilitating the maintenance of the pipeline.

[0021] In another schematic embodiment of the valve body core assembly, the valve body core assembly further includes a strip-shaped seal, which is wound around the part of the valve body core that can be inserted into the valve cavity along the second circumferential direction. Thereby, the strip-shaped seal can be pressed between the valve body core and the inner surface of the valve cavity to improve the sealing performance.

[0022] In yet another schematic embodiment of the valve body core assembly, the valve body core further includes a limiting ridge, which is arranged on the outer surface of the valve body core along the second circumferential direction. The strip-shaped seal is arranged on the limiting ridge. The limiting ridge can be inserted and matched with a limiting groove formed by the inner surface of the valve body to prevent the valve body core from rotating relative to the valve body during use.

[0023] In still another schematic embodiment of the valve body core assembly, the valve body core assembly further includes an annular seal, which is sleeved on the valve body core along the first circumferential direction. Two ends of the strip-shaped seal are respectively connected to two radially opposite sides of the annular seal. Thereby, the sealing between the valve body core and the mounting opening of the valve body can be realized.

[0024] In still another schematic embodiment of the valve body core assembly, the strip-shaped seal and the annular seal are integrally formed. Thereby, the strip-shaped seal and the annular seal can be assembled on the valve body core as a whole to improve the stability.

[0025] In still another schematic embodiment of the valve body core assembly, the valve body core forms an annular flange arranged along the first circumferential direction, and the flange has a first abutting surface perpendicular to the longitudinal axis. The annular seal is arranged on the first abutting surface. Thereby, the annular seal can be clamped by the first abutting surface and a second abutting surface of the valve body arranged opposite to the first abutting surface to improve the sealing effect of the annular seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings only schematically illustrate and explain the present invention and do not limit the scope of the present invention.

[0027] Figure 1 It is a cross-sectional view of a schematic embodiment of a control valve.

[0028] Figure 2 For Figure 1 A schematic structural view of the valve body core of the control valve shown.

[0029] Figure 3 It is a cross-sectional view of another schematic embodiment of a control valve.

[0030] Figure 4 For Figure 3 A schematic structural view of the valve body core and the seal of the control valve shown.

[0031] Figure 5 For Figure 3 A schematic structural view of the seal of the control valve shown.

[0032] Description of Reference Numerals

[0033] 10 Valve body

[0034] 11 Valve cavity

[0035] 111 First channel

[0036] 112 Second channel

[0037] 12 Mounting port

[0038] 122 Second abutting surface

[0039] 13 Limit groove

[0040] 14 Fluid port

[0041] 20 Valve body core

[0042] 201 Main body part

[0043] 202 End part

[0044] 21 Inner cavity

[0045] 211 First sub-cavity

[0046] 212 Second sub-cavity

[0047] 22 Valve seat part

[0048] 223 Throttling port

[0049] 23 First opening

[0050] 24 Second opening

[0051] 25 Limit ridge

[0052] 26 Positioning groove

[0053] 27 Flange

[0054] 271 First abutting surface

[0055] 28 Insertion port

[0056] 30 Valve stem

[0057] 31 Abutting part

[0058] 40 Valve flap

[0059] 51 Annular seal

[0060] 52 Strip seal

[0061] 60 Fastener

[0062] 70 Sealing sleeve

[0063] 80 Return spring.

[0064] X horizontal axis

[0065] Y vertical axis

[0066] C1 First circumferential direction

[0067] C2 Second circumferential direction Detailed implementation manners

[0068] For a clearer understanding of the technical features, objectives, and effects of the invention, the detailed implementation manners of the present invention will now be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote components having the same or similar structures but the same functions.

[0069] In this document, "schematic" means "serving as an example, instance, or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or more advantageous technical solution.

[0070] Figure 1 This is a cross-sectional view of a schematic implementation manner of a control valve proposed by the present invention. As Figure 1 shown, the control valve includes a valve body 10, a valve body core 20, a valve stem 30, and a valve flap 40. The valve body 10 has a valve chamber 11, an installation port 12 communicating with the valve chamber 11, and two fluid ports 14. The valve body 10 is, for example, the main body part of a two-way valve.

[0071] The valve body core 20 is detachably inserted into the valve body 10 through the installation port 12, and divides the valve chamber 11 into a first channel 111 and a second channel 112. The first channel 111 and the second channel 112 respectively correspond to a fluid port 14. When the control valve is applied to a pipeline, the first channel 111 and the second channel 112 can communicate with the pipeline through their respective corresponding fluid ports 14. The "detachable" connection manner between the valve body 10 and the valve body core 20 facilitates the replacement of the valve body core 20 after damage.

[0072] The valve body core 20 includes a valve seat portion 22 which has a throttling port 223 communicating the first channel 111 and the second channel 112. The valve stem 30 is movably inserted into the valve body core 20 from the mounting port 12. One end of the valve stem 30 located outside the valve body core 20 extends out of the control valve and is used for connecting an actuator, and the actuator can drive the valve stem 30 to move (in this illustrative embodiment, along the Y direction in the figure). The valve flap 40 is connected to one end of the valve stem 30 located inside the valve body core 20 and can, under the drive of the valve stem 30, abut against the valve seat portion 22 to close the throttling port 223. The valve flap 40 and the valve stem 30 can be integrally formed or can be connected together by assembly. In this illustrative embodiment, the valve stem 30 moves in a straight line, but is not limited thereto. In other illustrative embodiments, the valve stem can be rotatably inserted into the valve body core and can drive the valve flap to rotate by rotation to close or open the throttling port.

[0073] In this illustrative embodiment, the material of the valve body core 20 needs to be hard plastic for hard sealing, but is not limited thereto. In other illustrative embodiments, the valve body core 20 can also be wrapped with a flexible material for sealing.

[0074] In this embodiment, the valve seat portion 22 of the valve body core 20 cooperates with the valve flap 40 to cut off the fluid flowing through the throttling port, and the entire valve body core 20 can be removed from the valve body 10. When the valve seat portion 22 is worn, the entire valve body core 20 can be directly removed from the mounting port 12 and replaced with a new valve body core 20. This replacement does not require disconnecting the connection between the valve body 10 and the adjacent pipeline, thereby facilitating the maintenance of the pipeline.

[0075] The valve body core 20 has a longitudinal axis Y parallel to its insertion direction and a transverse axis X perpendicular to the longitudinal axis Y. The valve body core 20 also has a first circumferential direction C1 and a second circumferential direction C2. The axis of the first circumferential direction C1 is the longitudinal axis Y, and the axis of the second circumferential direction C2 is the transverse axis X. In the illustrative embodiment, the valve body core 20 is inserted into the valve body 10 such that the valve body 10 wraps around the portion of the valve body core 20 inserted into the valve cavity 11 along the second circumferential direction C2, thereby separating the first channel 111 and the second channel 112. This helps to simplify the structure of the valve body 10.

[0076] Figure 2 For Figure 1 The structural schematic diagram of the valve body core of the control valve shown. As Figure 1 and Figure 2As shown, in the illustrative embodiment, the valve body core 20 has a lumen 21. The valve seat portion 22 divides the lumen 21 into a first sub-lumen 211 and a second sub-lumen 212 along the longitudinal axis Y. The throttling port 223 communicates the first sub-lumen 211 and the second sub-lumen 212. The valve body core 20 forms a first opening 23 on the side of the first sub-lumen 211 facing the first channel 111 and forms a second opening 24 on the side of the second sub-lumen 212 facing the second channel 112. This structure is beneficial to the stability of the valve body core 20. Preferably, the valve body core 20 is completely open on the side of the first sub-lumen 211 facing the first channel 111 to form the first opening 23, and is completely open on the side of the second sub-lumen 212 facing the second channel 112 to form the second opening 24, thereby facilitating the reduction of fluid resistance.

[0077] In the illustrative embodiment, the valve body core 20 includes a main body portion 201 and an end portion 202. The main body portion 201 extends along the longitudinal axis Y and is cylindrical. The end portion 202 is hemispherical and is connected to one end of the main body portion 201 on the longitudinal axis Y. The main body portion 201 and the end portion 202 together enclose the lumen 21. The end portion 202 and a part of the main body portion 201 are located within the valve cavity 11. This facilitates the assembly of the valve body 10 and the valve body core 20.

[0078] In the illustrative embodiment, the valve seat portion 22 is provided at the connection between the main body portion 201 and the end portion 202. The first sub-lumen 211 is located in the main body portion 201, and the second sub-lumen 212 is located in the end portion 202. This facilitates the machining of the valve body core 20.

[0079] Figure 3 It is a cross-sectional view of another illustrative embodiment of the control valve. The similarities and differences between the control valve of this illustrative embodiment and the Figure 1 control valve shown are not elaborated here. The differences are that the control valve further includes a strip-shaped seal 52. The three-dimensional structure of the strip-shaped seal 52 is shown in Figure 4 and Figure 5 . The strip-shaped seal 52 is wound around the part of the valve body core 20 inserted into the valve cavity 11 along the second circumferential direction C2 and is pressed between the valve body core 20 and the inner surface of the valve cavity 11 to seal and isolate the first channel 111 and the second channel 112, preventing the fluids in the first channel 111 and the second channel 112 from communicating through the gap between the valve body core 20 and the inner surface of the valve body 10, so that the fluids in the first channel 111 and the second channel 112 can only communicate through the throttling port 223. The strip-shaped seal 52 is made of an elastic material such as rubber, for example.

[0080] In addition to being able to achieve Figure 1In addition to the effects of the control valve shown, the sealing between the valve body 10 and the valve body core 20 is further strengthened by a strip seal 52, and the strip seal 52 has a simple structure and can be conveniently assembled on the valve body core 20 during the assembly of the control valve.

[0081] In the illustrative embodiment, the valve body core 20 further includes a limiting ridge 25 which is disposed on the outer surface of the valve body core 20 along the second circumferential direction C2. A limiting groove 13 capable of being inserted and fitted with the limiting ridge 25 is formed on the inner surface of the valve body 10. The strip seal 52 is pressed between the limiting ridge 25 and the groove wall of the limiting groove 13. Thereby, the valve body core 20 can be prevented from rotating relative to the valve body 10 during use.

[0082] In the illustrative embodiment, a positioning groove 26 is formed on the limiting ridge 25, and the strip seal 52 is embedded in the positioning groove 26. Thereby, the strip seal 52 can be accurately positioned during the assembly of the control valve and is not easily displaced.

[0083] In the illustrative embodiment, the control valve further includes an annular seal 51 which is sleeved on the valve body core 20 along the first circumferential direction C1 and fits against the inner surface of the valve body 10 at the mounting port 12. The purpose is to achieve the sealing between the valve body core 20 and the mounting port 12 and prevent the fluid in the valve cavity 11 from leaking out through the gap between the mounting port 12 and the valve body core 20. The two ends of the strip seal 52 are respectively connected to the radially opposite sides of the annular seal 51. The annular seal 51 is made of an elastic material such as rubber, for example.

[0084] In the illustrative embodiment, the strip seal 52 and the annular seal 51 are integrally formed, and the plane where the annular seal 51 is located is perpendicular to the plane where the strip seal 52 is located. Thereby, the strip seal 52 and the annular seal 51 can be assembled on the valve body core 20 as a whole to improve the stability.

[0085] In the illustrative embodiment, the valve body core 20 protrudes to form an annular flange 27 which is disposed along the first circumferential direction C1. The flange 27 has a first abutting surface 271 perpendicular to the longitudinal axis Y. The valve body 10 has a second abutting surface 122 which is disposed opposite to the first abutting surface 271. The annular seal 51 is pressed between the first abutting surface 271 and the second abutting surface 122. By the clamping of the first abutting surface 271 and the second abutting surface 122, the sealing effect of the annular seal 51 can be improved.

[0086] In the illustrative embodiment, the control valve further includes a fastener 60 which is threadedly connected to the inner surface of the valve body 10 at the mounting port 12 and can abut against the valve body core 20 to fix it to the valve body 10. Thereby, the fixing of the valve body core 20 is facilitated.

[0087] In a schematic embodiment, a valve stem 30 connected to a valve flap 40 can be inserted into a valve body core 20 through an insertion port 28 of the valve body core 20. A fastener 60 can cover the insertion port 28. The valve stem 30 is movably disposed through the fastener 60. Thereby, when assembling the control valve, the valve flap 40 and the valve stem 30 can be fixed first, and then the whole can be inserted into the valve body core 20, which facilitates the assembly of the control valve.

[0088] In a schematic embodiment, the control valve further includes a flexible sealing sleeve 70 that wraps the valve flap 40 and one end of the fastener 60 covering the insertion port 28 to seal and isolate the valve flap 40, the valve stem 30, and the fastener 60 from the valve cavity 11. Thereby, corrosion of the valve flap 40, the valve stem 30, and the fastener 60 by the fluid can be prevented. The sealing sleeve 70 is made of an elastic material such as rubber, for example.

[0089] In a schematic embodiment, one end of the valve stem 30 located outside the valve body 10 has a abutting portion 31. The control valve further includes a return spring 80 that is sleeved on the valve stem 30 and abuts against the abutting portion 31 and the fastener 60 at both ends respectively. Thereby, the external force required for opening the control valve is reduced.

[0090] The present invention also provides a valve body core assembly for the above control valve. As Figure 1 and Figure 2 shown, in a schematic embodiment, the valve body core assembly includes a valve body core 20. The valve body core 20 has a longitudinal axis Y and a transverse axis X perpendicular to the longitudinal axis Y. The valve body core 20 further has a first circumferential direction C1 and a second circumferential direction C2. The axis of the first circumferential direction C1 is the longitudinal axis Y, and the axis of the second circumferential direction C2 is the transverse axis X. The valve body core 20 can be inserted into the valve cavity 11 of a valve body 10 of a control valve along its longitudinal axis Y, and its shape is adapted to be surrounded by the valve body 10 along the second circumferential direction C2 for the part inserted into the valve cavity 11, thereby separating the valve cavity 11 into a first channel 111 and a second channel 112. The valve body core 20 has an inner cavity 21 and includes a valve seat portion 22, a first opening 23, and a second opening 24.

[0091] The valve seat portion 22 is disposed in the inner cavity 21 and divides the inner cavity 21 into a first sub-cavity 211 and a second sub-cavity 212 along the longitudinal axis Y. The valve seat portion 22 has a throttling port 223 communicating the first sub-cavity 211 and the second sub-cavity 212. The first opening 23 communicates with the first sub-cavity 211. The second opening 24 communicates with the second sub-cavity 212. The first opening 23 and the second opening 24 are respectively located on opposite sides of the valve body core 20 in the transverse axis X.

[0092] The application of the valve body core assembly to the control valve is as described above and will not be elaborated here. The valve seat portion 22 of the valve body core 20 of the valve body core assembly can cooperate with the valve flap 40 of the control valve to cut off the fluid flowing through the throttling port, and the entire valve body core 20 can be removed from the valve body 10. When the valve seat portion 22 is worn, the entire valve body core 20 can be directly removed from the valve body 10 and replaced with a new valve body core 20. This replacement does not require disconnecting the connection between the valve body 10 and the adjacent pipeline, thereby facilitating the maintenance of the pipeline.

[0093] Figures 3 to 5 Another schematic embodiment of the valve body core assembly is shown. In this schematic embodiment, the valve body core assembly further includes a strip-shaped seal 52, which is wound around the portion of the valve body core 20 that can be inserted into the valve cavity 11 along the second circumferential direction C2 and can be pressed between the valve body core 20 and the inner surface of the valve cavity 11 to improve the sealing performance.

[0094] In the schematic embodiment, the valve body core 20 further includes a limiting ridge 25, which is arranged on the outer surface of the valve body core 20 along the second circumferential direction C2. The strip-shaped seal 52 is arranged on the limiting ridge 25. The limiting ridge 25 can be inserted and matched with a limiting groove 13 formed on the inner surface of the valve body 10 to prevent the valve body core 20 from rotating relative to the valve body 10 during use.

[0095] In the schematic embodiment, the valve body core assembly further includes an annular seal 51, which is sleeved on the valve body core 20 along the first circumferential direction C1 to achieve the seal between the valve body core 20 and the mounting port 12 of the valve body 10. The two ends of the strip-shaped seal 52 are respectively connected to the two radially opposite sides of the annular seal 51.

[0096] In the schematic embodiment, the strip-shaped seal 52 and the annular seal 51 are integrally formed. Thereby, the strip-shaped seal 52 and the annular seal 51 can be assembled on the valve body core 20 as a whole to improve the stability.

[0097] In the schematic embodiment, the valve body core 20 is formed with an annular flange 27 arranged along the first circumferential direction C1, and the flange 27 has a first abutting surface 271 perpendicular to the longitudinal axis Y. The annular seal 51 is arranged on the first abutting surface 271. Thereby, the annular seal 51 can be clamped by the first abutting surface 271 and a second abutting surface 122 of the valve body 10 arranged opposite to the first abutting surface 271 to improve the sealing effect of the annular seal 51.

[0098] It should be understood that although this specification is described according to various embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0099] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or change made without departing from the technical spirit of the present invention, such as the combination, division, or repetition of features, should be included in the protection scope of the present invention.

Claims

1. A control valve, characterized in that: include: A valve body (10) having two fluid ports (14), a valve cavity (11) extending between the two fluid ports (14), and a mounting port (12) communicating with the valve cavity (11); a valve body core (20) which is detachably inserted into the valve body (10) via the mounting opening (12) and divides the valve cavity (11) into a first channel (111) and a second channel (112) respectively corresponding to the two fluid ports (14), wherein the valve body core (20) comprises a valve seat portion (22), and the valve seat portion (22) has a shutoff port (223) communicating with the first channel (111) and the second channel (112); a valve stem (30) which is movably inserted into the valve body core (20) from the installation opening (12); and a valve flap (40) connected to one end of the valve stem (30) and capable of abutting against the valve seat portion (22) to close the intercepting port (223) under the drive of the valve stem (30); The valve body core (20) has a longitudinal axis (Y) parallel to its insertion direction and a transverse axis (X) perpendicular to the longitudinal axis (Y), and the valve body core (20) also has a first circumferential direction (C1) and a second circumferential direction (C2), the axis of the first circumferential direction (C1) being the longitudinal axis (Y), and the axis of the second circumferential direction (C2) being the transverse axis (X); the valve body core (20) is inserted into the valve body (10), so that the valve body (10) surrounds the part of the valve body core (20) inserted into the valve cavity (11) along the second circumferential direction (C2), thereby separating the first channel (111) and the second channel (112).

2. The control valve according to claim 1, characterized in that It also includes a strip seal (52), which is arranged along the second circumferential direction (C2) around the portion of the valve body core (20) inserted into the valve cavity (11) and is pressed between the inner surface of the valve body core (20) and the valve cavity (11) to seal and isolate the first channel (111) and the second channel (112).

3. The control valve according to claim 2, characterized in that The valve body core (20) further comprises a limiting ridge (25) which is arranged on the outer surface of the valve body core (20) along the second circumferential direction (C2); the inner surface of the valve body (10) forms a limiting groove (13) which can be plugged into and fit with the limiting ridge (25); and the strip seal (52) is pressed between the limiting ridge (25) and the groove wall of the limiting groove (13).

4. The control valve according to claim 2, characterized in that It also includes an annular seal (51) which is sleeved on the valve body core (20) along the first circumferential direction (C1) and fits against the inner surface of the valve body (10) at the installation opening (12), and the two ends of the strip seal (52) are respectively connected to two radially opposite sides of the annular seal (51).

5. The control valve according to claim 4, characterized in that The strip seal (52) and the annular seal (51) are integrally formed, and the plane where the annular seal (51) is located is perpendicular to the plane where the strip seal (52) is located.

6. The control valve according to claim 5, characterized in that The valve body core (20) is formed with an annular flange (27) protruding along the first circumferential direction (C1), and the flange (27) has a first abutment surface (271) perpendicular to the longitudinal axis (Y); the valve body (10) has a second abutment surface (122) arranged opposite to the first abutment surface (271), and the annular seal (51) is pressed between the first abutment surface (271) and the second abutment surface (122).

7. The control valve according to any one of claims 1 to 6, characterized in that: The valve body core (20) has an inner cavity (21); the valve seat portion (22) divides the inner cavity (21) into a first sub-cavity (211) and a second sub-cavity (212) on the longitudinal axis (Y); the shut-off port (223) connects the first sub-cavity (211) and the second sub-cavity (212); the valve body core (20) is open on a side of the first sub-cavity (211) facing the first channel (111) to form a first opening (23); and is open on a side of the second sub-cavity (212) facing the second channel (112) to form a second opening (24).

8. The control valve according to claim 7, characterized in that The valve body core (20) comprises: a main body portion (201) extending along the longitudinal axis (Y) and having a cylindrical shape; and An end portion (202) is hemispherical and connected to one end of the main body (201) on the longitudinal axis (Y), the main body (201) and the end portion (202) together enclosing the inner cavity (21); the end portion (202) and a portion of the main body (201) are located in the valve cavity (11).

9. The control valve according to claim 8, characterized in that The valve seat portion (22) is arranged at the connection between the main body portion (201) and the end portion (202); the first sub-chamber (211) is located in the main body portion (201), and the second sub-chamber (212) is located in the end portion (202).

10. The control valve according to claim 1, characterized in that It also includes a fastener (60) which is threadedly connected to the inner surface of the valve body (10) at the installation opening (12) and can abut against the valve body core (20) to be fixed to the valve body (10).

11. The control valve according to claim 10, characterized in that The valve stem (30) connected to the valve flap (40) can be inserted into the valve body core (20) through an insertion port (28) of the valve body core (20); the fastener (60) can cover the insertion port (28); and the valve stem (30) can be movably inserted into the fastener (60).

12. The control valve according to claim 11, characterized in that It also includes a flexible sealing sleeve (70) that wraps the valve flap (40) and the fastener (60) to cover one end of the insertion port (28) so as to seal and isolate the valve flap (40), the valve stem (30) and the fastener (60) from the valve chamber (11).

13. The control valve according to claim 1, characterized in that The valve body core (20) is integrally formed from a plastic material.

14. A valve body core assembly for a control valve according to any one of claims 1 to 13, characterized in that: include: A valve body core (20) having a longitudinal axis (Y) and a transverse axis (X) perpendicular to the longitudinal axis (Y), the valve body core (20) also having a first circumferential direction (C1) and a second circumferential direction (C2), the axis of the first circumferential direction (C1) being the longitudinal axis (Y), and the axis of the second circumferential direction (C2) being the transverse axis (X); the valve body core (20) can be inserted into a valve cavity (11) of a valve body (10) of a control valve along its longitudinal axis (Y), and its shape is suitable for being surrounded by the valve body (10) along the second circumferential direction (C2) and the part inserted into the valve cavity (11); thereby the valve cavity (11) is divided into a first channel (111) and a second channel (112) corresponding to the two fluid ports (14) respectively; the valve body core (20) has an inner cavity (21), and comprises: a valve seat portion (22) disposed in the inner cavity (21) and dividing the inner cavity (21) into a first sub-cavity (211) and a second sub-cavity (212) on the longitudinal axis (Y), the valve seat portion (22) having a shutoff port (223) communicating with the first sub-cavity (211) and the second sub-cavity (212); a first opening (23) communicating with the first sub-chamber (211); A second opening (24) is connected to the second sub-chamber (212); the first opening (23) and the second opening (24) are respectively located on two opposite sides of the valve body core (20) on the transverse axis (X).

15. The valve body core assembly according to claim 14, characterized in that: It also includes a strip seal (52) which is arranged along the second circumferential direction (C2) around a portion of the valve body core (20) that can be inserted into the valve cavity (11).

16. The valve body core assembly according to claim 15, characterized in that: The valve body core (20) further comprises a limiting ridge (25) which is arranged on the outer surface of the valve body core (20) along the second circumferential direction (C2); the strip sealing element (52) is arranged on the limiting ridge (25).

17. The valve body core assembly according to claim 15, characterized in that: It also comprises an annular sealing member (51) which is sleeved on the valve body core (20) along the first circumferential direction (C1), and the two ends of the strip sealing member (52) are respectively connected to two radially opposite sides of the annular sealing member (51).

18. The valve body core assembly according to claim 17, characterized in that: The strip-shaped sealing component (52) and the annular sealing component (51) are integrally formed.

19. The valve body core assembly according to claim 18, characterized in that: The valve body core (20) is formed with an annular flange (27) arranged along the first circumferential direction (C1), the flange (27) having a first abutment surface (271) perpendicular to the longitudinal axis (Y); the annular seal (51) is arranged on the first abutment surface (271).

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