Stop valve and working method thereof

Abstract

The invention belongs to the technical field of engineering elements, and particularly relates to a valve, in particular to a stop valve and a working method thereof. The stop valve comprises a valve body which is internally provided with a containing cavity, and the two ends of the valve body are provided with inlet and outlet flow channels communicating with the containing cavity correspondingly; the valve clack is arranged in the containing cavity in a lifting mode; the valve seat is arranged on the bottom wall of the containing cavity, located below the valve clack and used for being communicated with the inlet and outlet flow channel. A plurality of guide through holes are formed in the valve seat in the radial direction; the adjusting sealing assembly is located below the valve clack and comprises an adjusting piece arranged in the guide through hole in a sliding mode. When the valve clack moves upwards to open the valve body, the adjusting piece slides outwards so that the inner wall of the valve seat can be in a concave shape. When the valve clack moves downwards to close the valve body, all the adjusting pieces move inwards to hoop the outer wall of the valve clack. By adjusting the matching of the sealing assembly and the valve clack, the impact of fluid on the valve clack can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering components, specifically relates to valves, and particularly relates to a globe valve and its working method. Background Art

[0002] As an extremely important cut-off valve, the sealing of a globe valve is achieved by applying torque to the valve stem. The valve stem applies pressure to the valve disc in the axial direction, causing the sealing surfaces of the valve disc and the valve seat to closely fit together, preventing the medium from leaking along the gap between the sealing surfaces.

[0003] The force applied when the globe valve is closed is greater than the force applied when it is opened. Therefore, for convenient use, a driving device is generally provided on the globe valve to drive the axial lifting movement of the valve stem. However, during the opening process of the globe valve, when the fluid in the valve body flows through the valve disc, the vibration and torque fluctuations generated by the fluid impacting the valve disc will be transmitted to the driving device through the valve stem. In particular, the transmission components (such as gears and worm gears) in the driving device will be accelerated in wear due to high-frequency vibration.

[0004] Therefore, how to reduce the vibration and torque fluctuations of the valve disc is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information on related technologies. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide a globe valve and its working method.

[0007] In a first aspect, the embodiments of the present disclosure provide a globe valve, including: A valve body, which is provided with an accommodation cavity inside, and the two ends of the valve body are respectively provided with inlet and outlet channels communicating with the accommodation cavity; A valve seat, which is arranged on the bottom wall of the accommodation cavity, and the valve seat is provided with a plurality of guiding through holes along the radial direction; A valve disc, which is arranged to move up and down in the accommodation cavity and is used to open and close the valve seat; An adjusting and sealing assembly, which is located below the valve disc and includes adjusting pieces slidably arranged in each guiding through hole; Wherein, when the valve disc moves upward to open the valve body, each of the adjusting pieces slides outward to make the inner wall of the valve seat concave; When the valve disc moves downward to close the valve body, each adjusting piece moves inward to tighten the outer wall of the valve disc.

[0008] In an optional embodiment, the valve seat is provided with a fixed annular groove along the axial direction, and the fixed annular groove communicates with the guiding through holes.

[0009] In an alternative embodiment, the adjusting and sealing assembly includes a sealing ring, which is vertically arranged in the fixed ring groove and has its upper end protruding from the valve seat; A plurality of the adjusting pieces are arranged circumferentially along the sealing ring, and the lower end of the sealing ring is adapted to be inserted into the arc grooves of the adjusting pieces; Wherein, when the valve flap opens, the sealing ring moves upward, and each adjusting piece slides outward to make the inner wall of the valve seat concave; When the valve flap closes, the sealing ring pushes each adjusting piece to slide inward until the inner end walls of the adjusting pieces clamp the outer wall of the valve flap; The outer ends of the adjusting pieces contract into the guiding through holes to increase the space in the accommodating cavity.

[0010] In an alternative embodiment, a plurality of limiting blocks are evenly distributed on the outer wall of the sealing ring, and the limiting blocks are arranged along the axial direction of the sealing ring; A plurality of limiting grooves adapted to the limiting blocks are formed on the inner wall of the fixed ring groove; A return spring is arranged in the limiting groove, and two ends of the return spring respectively abut against the bottom wall of the limiting block and the bottom wall of the limiting groove, and the return spring is adapted to push the sealing ring to move upward.

[0011] In an alternative embodiment, the slot width of the arc groove in the radial direction of the adjusting piece is greater than the thickness of the sealing ring, and the lower end of the sealing ring is adapted to be inserted into the arc groove.

[0012] In an alternative embodiment, a plurality of adjusting grooves are axially formed on the bottom wall of the sealing ring, and the adjusting grooves are located between adjacent adjusting pieces; Wherein, when the sealing ring pushes each adjusting piece to slide inward until it clamps the outer wall of the valve flap, the top wall in the adjusting groove abuts against the surface of the adjusting piece.

[0013] In an alternative embodiment, the circumferential slot length of the arc groove is not less than the arc length between adjacent adjusting grooves, so as to facilitate the sealing ring to push the adjusting piece to move inward after being inserted into the arc groove.

[0014] In an alternative embodiment, a first inclined surface is arranged on the side wall of the arc groove close to the axis of the valve seat; A second inclined surface is arranged on the bottom wall of the sealing ring, and the inclination angle and inclination direction of the second inclined surface are the same as those of the first inclined surface; Wherein, when the sealing ring moves downward, the second inclined surface abuts against the first inclined surface to push each adjusting piece to slide inward.

[0015] In an alternative embodiment, a sealing groove is formed on the outer wall of the upper part of the valve flap, and the sealing ring is adapted to be inserted into the sealing groove.

[0016] In an alternative embodiment, a sealing spring piece is sleeved and fixed on the outer wall of the valve flap, and the outer wall of the sealing spring piece is fixed on the inner wall of the accommodating cavity.

[0017] In a second aspect, an embodiment of the present disclosure further provides a working method for a globe valve, and the working method includes: When the valve flap moves upward to open the valve body, the adjusting piece slides outward to make the inner wall of the valve seat concave; When the valve flap moves downward to close the valve body, each adjusting piece moves inward to tighten the outer wall of the valve flap, so as to seal between the valve flap and the valve seat.

[0018] The beneficial effect of the present invention is that the present invention provides a globe valve and a working method thereof. By adjusting the cooperation of the sealing assembly, the valve seat and the valve flap, when the valve flap opens the valve seat, each adjusting piece moves outward to make the inner wall of the valve seat concave, so as to slow down the flow rate of the fluid passing through the valve seat and reduce the impact force of the fluid on the valve flap.

[0019] Other features and advantages of the present invention will be described in the following description of the specification, and part of them will be obvious from the description of the specification, or will be understood by implementing the present invention. The purpose and other advantages of the present invention are achieved and obtained by the structure specifically pointed out in the description and the drawings.

[0020] To make the above objects, features and advantages of the present invention more obvious and understandable, specific preferred embodiments are given herein, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 An internal perspective view of the globe valve provided by the embodiment of the present disclosure; Figure 2 A perspective view of the adjusting and sealing assembly provided by the embodiment of the present disclosure; Figure 3 A sectional perspective view of the adjusting and sealing assembly provided by the embodiment of the present disclosure; Figure 4 A front view of the valve flap in the open state provided by the embodiment of the present disclosure; Figure 5 A front view of the valve flap in the closed state provided by the embodiment of the present disclosure.

[0023] In the figure: 1. Valve body; 10. Accommodating cavity; 2. Valve seat; 20. Guide through-hole; 21. Fixed ring groove; 22. Limit groove; 3. Valve flap; 30. Sealing groove; 31. Sealing spring piece; 4. Adjusting and sealing assembly; 40. Adjusting piece; 41. Sealing ring; 42. Limit block; 44. Return spring; 45. Arc groove; 46. Adjusting groove; 47. First inclined surface; 48. Second inclined surface. Detailed implementation mode

[0024] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] In this document, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, for the purpose of effectively describing the technical content, the thickness of the components may be exaggerated or reduced.

[0026] In this document, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terms used in this document are only for describing specific exemplary configurations and are not intended to be restrictive. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless clearly stated otherwise in this context. The terms "comprising", "including", and "having" are inclusive, and thus specify the presence of features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described in this document should not be construed as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as the order of execution. Additional or alternative steps may be employed.

[0028] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after the phrase can be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0029] It has been found through research that in the related art, the force applied when the globe valve is closed is greater than the force applied when it is opened. Therefore, in order to improve efficiency, a driving device is often provided on the globe valve to drive the valve stem to move axially up and down. However, during the opening process of the globe valve, when the fluid in the valve body flows through the valve disc, the vibration and torque fluctuations generated by the fluid impacting the valve disc will be transmitted to the driving device through the valve stem. In particular, the transmission components (such as gears, worm gears) in the driving device will be accelerated in wear due to high-frequency vibration.

[0030] Therefore, how to mitigate the fluid impact on the valve disc is a technical problem urgently to be solved in the art.

[0031] Regarding the defects of the above solutions and the reasons for their occurrence, they are all the results obtained by the inventors through practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by the present disclosure in this article for the above problems should be the contributions made by the inventors to the present disclosure during the process of the present disclosure.

[0032] It should be noted that: like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0034] As Figures 1 to 5As shown, at least one embodiment provides a globe valve, comprising: a valve body 1, within which there is a receiving cavity 10, and flow channels for inflow and outflow communicating with the receiving cavity 10 are respectively formed at two ends of the valve body 1; the valve body 1 is a globe valve; preferably, a driving device is arranged at the upper end of the valve body 1, a valve disc 3 is fixed on a valve stem, the valve stem is fixed at the movable end of the driving device, and the driving device drives the valve disc 3 to move vertically up and down through the valve stem to open or close a valve seat 2. The valve seat 2 is arranged at the bottom wall of the receiving cavity 10 and is used for communicating the inflow and outflow channels; after the fluid flows into the valve body 1 through the inflow channel, it flows towards the outflow channel after passing through the valve seat 2. The valve disc 3 is arranged to be movable up and down within the receiving cavity 10 and is used for opening and closing the valve seat 2; a plurality of guiding through holes 20 are formed in the valve seat 2 in the radial direction; the adjusting piece 40 is in sliding seal with the guiding through holes 20, that is, when the adjusting piece 40 slides horizontally within the guiding through holes 20, the fluid within the valve seat 2 will not flow outwards through the gap between the inner wall of the guiding through holes 20 and the outer wall of the adjusting piece 40. An adjusting and sealing assembly 4 is located below the valve disc 3 and comprises an adjusting piece 40 slidably arranged within the guiding through holes 20; wherein, when the valve disc 3 moves upwards to open the valve body 1, the adjusting piece 40 slides and retracts outwards along the guiding through holes 20 to make the inner wall of the valve seat 2 concave; the inner wall of the valve seat 2 through which the fluid flows is concave. Compared with the valve seat 2 with a smooth inner wall, the flow rate of the fluid flowing through the concave shape will decrease, and the decrease in the flow rate can slow down the impact force of the fluid on the valve disc 3, thereby reducing the vibration of the valve disc 3. When the adjusting piece 40 moves outwards and inserts into the valve body 1, the stability of the valve body 1 is improved. When the valve disc 3 moves downwards to close the valve body 1, each adjusting piece 40 moves inwards to clamp the outer wall of the valve disc 3. Through the cooperation of the adjusting and sealing assembly 4, the valve seat 2 and the valve disc 3, when the valve disc 3 opens the valve seat 2, each adjusting piece 40 moves outwards to make the inner wall of the valve seat 2 concave, so as to slow down the flow rate of the fluid passing through the valve seat 2 and reduce the impact force of the fluid on the valve disc 3. In this embodiment, the globe valve only needs to achieve quick opening and closing, and there is no flow control, so the opening degree of the globe valve does not need to be considered, that is, the globe valve in this embodiment has only two working conditions: fully open and fully closed.

[0035] Refer to the attached Figure 1 As shown, an annular fixing groove 21 is formed in the valve seat 2 in the axial direction, and the annular fixing groove 21 communicates with the guiding through holes 20. The width of the opening of the annular fixing groove 21 in the radial direction of the valve seat 2 is the same as the thickness of a sealing ring 41, and the sealing ring 41 is in sliding seal with the annular fixing groove 21.

[0036] Refer to the attached Figure 2, the adjusting and sealing assembly 4 includes: a sealing ring 41 which is arranged to be lifted and lowered in the fixed ring groove 21 and has its upper end protruding from the valve seat 2; the sealing ring 41 is arranged below the valve flap 3; a sealing groove 30 is formed on the outer wall of the upper part of the valve flap 3, and the sealing ring 41 is adapted to be inserted into the sealing groove 30. When the valve flap 3 moves downward to close the valve seat 2, the upper end of the sealing ring 41 is inserted into the sealing groove 30, and the sealing ring 41 is pushed downward by the valve flap 3. The insertion of the sealing ring 41 into the sealing groove 30 can improve the sealing performance of the valve flap 3. A plurality of adjusting pieces 40 are evenly distributed along the circumferential direction of the sealing ring 41, and the lower end of the sealing ring 41 is adapted to be inserted into the arc groove 45 of the adjusting piece 40; further, an arc groove 45 is formed on the adjusting piece 40, and the width of the arc groove 45 in the radial direction of the adjusting piece 40 is greater than the thickness of the sealing ring 41, and the sealing ring 41 is adapted to be inserted into the arc groove 45. Refer to the attached Figure 4 , Figure 4 The arrow direction in shows the water flow direction. Among them, when the valve flap 3 is opened, the sealing ring 41 moves upward, and each adjusting piece 40 slides outward to make the inner wall of the valve seat 2 concave; when the valve flap 3 is opened, the fluid flows into the valve seat 2 through the inflow channel, and under the action of the water flow pressure, each adjusting piece 40 is pushed outward to move until the outer wall of the adjusting piece 40 abuts against the inner wall of the accommodating cavity 10. Since the adjusting piece 40 moves outward, the inner wall of the valve seat 2 becomes concave, so that when the fluid flows through the valve seat 2, the flow rate of the water flow is slowed down. When the valve flap 3 is closed, the valve flap 3 pushes the sealing ring 41 downward, and each adjusting piece 40 is pushed by the sealing ring 41 to slide inward to tightly hold the outer wall of the valve flap 3; each adjusting piece 40 clamps and tightly holds the valve flap 3 from all around, and at the same time each adjusting piece 40 can share the static pressure of the fluid on the valve flap 3. The outer end of the adjusting piece 40 contracts into the guiding through hole 20 to increase the space in the accommodating cavity 10. At this time, the space in the accommodating cavity 10 increases, and the water flow flowing towards the outflow channel can be negatively adsorbed towards the accommodating cavity 10 to prevent liquid from dripping outwards at the outflow channel of the valve body 1.

[0037] Refer to the attached Figure 1 and Figure 2 , in order to improve the stability of the lifting movement of the sealing ring 41, a plurality of limiting blocks 42 are evenly distributed on the outer wall of the sealing ring 41, and the limiting blocks 42 are arranged along the axial direction of the sealing ring 41; a plurality of limiting grooves 22 adapted to the limiting blocks 42 are formed on the inner wall of the fixed ring groove 21; the length of the opening of the limiting groove 22 is greater than the length of the limiting block 42, and here the length refers to the length of the limiting block 42 in the axial direction. A return spring 44 is arranged in the limiting groove 22, and the two ends of the return spring 44 respectively abut against the bottom wall of the limiting block 42 and the bottom wall of the limiting groove 22, and the return spring 44 is adapted to push the sealing ring 41 upward. When the valve flap 3 is in the open state, the return spring 44 pushes the sealing ring 41 upward to make the lower end of the sealing ring 41 disengage from the adjusting groove 46.

[0038] Continuing to refer to the attached Figure 2 , an adjustment groove 46 is provided on the bottom wall of the sealing ring 41, and the adjustment groove 46 is located between two adjacent adjustment pieces 40; wherein, when the sealing ring 41 pushes each adjustment piece 40 to slide inward to tightly hoop the outer wall of the valve flap 3, the inner top wall of the adjustment groove 46 abuts against the surface of the adjustment piece 40. The grooving length of the circular arc groove 45 in the circumferential direction is not less than the circular arc length between two adjacent adjustment grooves 46, so as to facilitate the sealing ring 41 to push the adjustment piece 40 to move inward after being inserted into the circular arc groove 45. The setting of the adjustment groove 46 enables the lower end of the sealing ring 41 to be inserted into the circular arc groove 45 when the sealing ring 41 moves downward.

[0039] Referring to the attached Figure 3 , a first inclined surface 47 is provided on the side wall of the circular arc groove 45 close to the axis of the valve seat 2; a second inclined surface 48 is provided on the bottom wall of the sealing ring 41, and the inclined angles and directions of the second inclined surface 48 and the first inclined surface 47 are the same; wherein, when the sealing ring 41 moves downward, the second inclined surface 48 abuts against the first inclined surface 47 to push each adjustment piece 40 to slide inward.

[0040] Referring to the attached Figure 1 , a sealing elastic sheet 31 is sleeved and fixed on the outer wall of the valve flap 3, and the outer wall of the sealing elastic sheet 31 is fixed on the inner wall of the accommodating cavity 10.

[0041] At least one embodiment provides a working method of a globe valve, and the working method includes: When the valve flap 3 moves upward to open the valve body 1, the adjustment piece 40 slides outward to make the inner wall of the valve seat 2 concave; when the valve flap 3 moves downward to close the valve body 1, each adjustment piece 40 moves inward to tightly hoop the outer wall of the valve flap 3, so as to seal between the valve flap 3 and the valve seat 2.

[0042] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Thus, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0044] Based on the above enlightenment of the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A globe valve, characterized in that, Comprising: A valve body (1) with an accommodation cavity (10) formed therein, and flow inlets and outlets communicating with the accommodation cavity (10) are respectively formed at both ends of the valve body (1); A valve seat (2) disposed on the bottom wall of the accommodation cavity (10), and a plurality of guiding through holes (20) are radially formed in the valve seat (2) from its outer wall to its inner wall; A valve flap (3) is vertically arranged in the accommodation cavity (10) for opening and closing the valve seat (2); An adjusting and sealing assembly (4) located below the valve flap (3), including adjusting pieces (40) slidably arranged in the respective guiding through holes (20); Wherein, when the valve flap (3) moves upward to open the valve body (1), the respective adjusting pieces (40) slide outward and retract along the guiding through holes (20) to make the inner wall of the valve seat (2) concave; When the valve flap (3) moves downward to close the valve body (1), the respective adjusting pieces (40) slide inward along the guiding through holes (20) to clamp the outer wall of the valve flap (3).

2. The globe valve according to claim 1, characterized in that The valve seat (2) is axially provided with a fixing annular groove (21) communicating with the guiding through holes (20).

3. The globe valve according to claim 2, characterized in that The adjusting and sealing assembly (4) further includes a sealing ring (41) vertically arranged in the fixing annular groove (21) with its upper end protruding from the valve seat (2); A plurality of the adjusting pieces (40) are circumferentially and evenly distributed along the sealing ring (41), and the lower end of the sealing ring (41) is adapted to be inserted into an arc groove (45) of the adjusting piece (40); Wherein, when the valve flap (3) is opened, the sealing ring (41) moves upward and the respective adjusting pieces (40) slide outward to make the inner wall of the valve seat (2) concave; When the valve flap (3) is closed, the sealing ring (41) pushes the respective adjusting pieces (40) to slide inward until the inner end walls of the adjusting pieces (40) clamp the outer wall of the valve flap (3); The outer ends of the adjusting pieces (40) retract into the guiding through holes (20) to increase the space in the accommodation cavity (10).

4. The globe valve according to claim 3, characterized in that A plurality of limiting blocks (42) are evenly distributed on the outer wall of the sealing ring (41) and arranged axially along the sealing ring (41); Limiting grooves (22) adapted to the limiting blocks (42) are formed in the inner wall of the fixing annular groove (21); A return spring (44) is arranged in the limiting groove (22), and two ends of the return spring (44) are respectively in contact with the bottom wall of the limiting block (42) and the bottom wall of the limiting groove (22), and the return spring (44) is adapted to push the sealing ring (41) upward.

5. The globe valve according to claim 3, characterized in that The width of the arc groove (45) in the radial direction of the adjusting piece (40) is greater than the thickness of the sealing ring (41), and the lower end of the sealing ring (41) is adapted to be inserted into the arc groove (45).

6. The globe valve according to claim 3, characterized in that A plurality of adjusting grooves (46) are axially formed in the bottom wall of the sealing ring (41) and located between adjacent adjusting pieces (40); When the sealing ring (41) pushes each adjusting piece (40) to slide inwards until tightly clamping the outer wall of the valve flap (3), the inner top wall of the adjusting groove (46) abuts against the surface of the adjusting piece (40).

7. The globe valve according to claim 5, wherein the grooving length of the arc groove (45) in the circumferential direction is not less than the arc length between two adjacent adjusting grooves (46), so as to facilitate the sealing ring (41) to push the adjusting piece (40) to move inwards after being inserted into the arc groove (45).

8. The globe valve according to claim 5, wherein a first inclined surface (47) is provided on the side wall of the arc groove (45) close to the axis of the valve seat (2); a second inclined surface (48) is provided on the bottom wall of the sealing ring (41), and the inclination angle and inclination direction of the second inclined surface (48) are the same as those of the first inclined surface (47); when the sealing ring (41) moves downwards, the second inclined surface (48) abuts against the first inclined surface (47) to push each adjusting piece (40) to slide inwards.

9. The globe valve according to claim 3, wherein a sealing groove (30) is circumferentially formed on the upper outer wall of the valve flap (3), and the sealing ring (41) is adapted to be inserted into the sealing groove (30).

10. The globe valve according to claim 3, wherein a sealing spring piece (31) is sleeved and fixed on the outer wall of the valve flap (3), and the outer wall of the sealing spring piece (31) is fixed on the inner wall of the accommodating cavity (10).

11. A working method of a globe valve, characterized in that, Using the globe valve according to any one of claims 1-10, the working method includes: when the valve flap (3) moves upwards to open the valve body (1), the adjusting piece (40) slides outwards to make the inner wall of the valve seat (2) concave; when the valve flap (3) moves downwards to close the valve body (1), each adjusting piece (40) moves inwards to tightly clamp the outer wall of the valve flap (3), so as to seal between the valve flap (3) and the valve seat (2).

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