Delivery valve for fluids and method of operation thereof

Abstract

The present application belongs to the technical field of engineering elements, and particularly relates to a fluid delivery valve and a working method thereof. The present application provides a fluid delivery valve, comprising: a valve body; a sealing assembly which is arranged in the valve body in a lifting manner; an adjusting assembly which is sleeved on the outer wall of the sealing assembly and is threadedly matched with the valve body; and a limiting member which is arranged in the valve body in a sliding manner and is adapted to limit the sealing disc of the sealing assembly; wherein, when the sealing assembly moves downward to seal the valve body, the two limiting members are adapted to limit the sealing disc from both sides; after the adjusting assembly moves downward in a spiral manner to the lower end of the adjusting assembly and abuts against the sealing disc, the adjusting assembly is reversely rotated, and the sealing assembly moves upward synchronously with the adjusting assembly to open the valve body; and the cooperation of the sealing assembly and the adjusting assembly improves the sealing effect of the valve body.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering elements, and particularly relates to a one-way valve, especially a fluid delivery valve and a working method thereof. BACKGROUND

[0002] When fluid passes through the valve, the opening degree of the valve is suitable for adjusting the flow rate of the fluid. When the flow rate of the fluid is too fast or the pressure is too large, the impact force of the fluid on the sealing disc of the valve is large, which causes the upward moving stroke of the lifting column on the sealing disc to increase, and causes the axial force of the sealing device on the valve to increase, and finally causes the sealing performance of the valve to decrease, and causes the fluid leakage of the valve.

[0003] Therefore, how to solve the technical problem that the sealing performance is reduced due to the excessive axial force of the sealing disc is a technical problem that needs to be solved in the field.

[0004] It should be noted that the above information disclosed in the background section is only used to understand the background of the present application, and therefore, the above description is not considered to constitute the information of the prior art. SUMMARY

[0005] The present application at least provides a fluid delivery valve and a working method thereof.

[0006] In a first aspect, the present application provides a fluid delivery valve, comprising:

[0007] a valve body;

[0008] a sealing assembly, which is arranged to be lifted in the valve body;

[0009] an adjusting assembly, which is sleeved on the outer wall of the sealing assembly and is threadedly matched with the valve body;

[0010] a limiting member, which is slidably arranged in the valve body and is suitable for limiting the sealing disc of the sealing assembly;

[0011] wherein, when the sealing assembly moves downward to seal the valve body, the two limiting members are suitable for limiting the sealing disc from both sides;

[0012] the adjusting assembly is spirally moved downward, after the lower end of the adjusting assembly abuts against the sealing disc, the adjusting assembly is reversely rotated, and the sealing assembly is synchronously moved upward with the adjusting assembly to open the valve body.

[0013] In an optional embodiment, the sealing assembly comprises a sealing disc, which is in sliding sealing with the inner wall of the water outlet in the valve body.

[0014] a lifting column, which is fixed on the sealing disc and is suitable for moving up and down in the valve body.

[0015] In an alternative embodiment, the outflow channel inner wall is circumferentially fixed with a positioning ring, and the sealing disc is adapted to abut against the positioning ring.

[0016] In an alternative embodiment, the adjusting assembly comprises an outer sleeve, which is sleeved on the outer wall of the lifting column and has a threaded fit with the valve body;

[0017] An adjusting disc is fixed on the lower bottom of the outer sleeve and is arranged above the sealing disc;

[0018] A rotating disc is fixed on the upper end of the outer sleeve.

[0019] In an alternative embodiment, the outer wall of the lifting column is sleeved with a compression spring, the lower end of the compression spring is fixed on the sealing disc, and the upper end of the compression spring abuts against the bottom wall of the adjusting disc.

[0020] In an alternative embodiment, the outflow channel inner wall is fixed with a sealing ring, the sealing ring is arranged above the adjusting disc, and the adjusting disc is adapted to abut against the sealing ring.

[0021] In an alternative embodiment, the valve body is provided with an outflow pipe, and the water inlet of the outflow pipe is arranged above the positioning ring.

[0022] In an alternative embodiment, one end of the limiting piece close to the sealing disc is provided with an inclined surface, and the limiting piece is arranged between the water inlet box and the positioning ring.

[0023] In an alternative embodiment, the bottom wall of the adjusting disc is provided with a ring groove, the ring groove is arranged close to the lifting column, and the compression spring is adapted to be shrunk in the ring groove.

[0024] In an alternative embodiment, the bottom wall of the sealing disc is in the shape of a circular arc, and the sealing disc is adapted to push the limiting piece to move outward when moving downward.

[0025] In an alternative embodiment, the upper top wall of the adjusting disc is in the shape of a circular arc, and the adjusting disc is adapted to push the limiting piece to move outward when moving upward.

[0026] In a second aspect, the embodiments of the present disclosure further provide a working method of a delivery valve, comprising: when the valve body needs to be sealed, the sealing assembly moves downward to seal the valve body, and the two limiting pieces are adapted to limit the sealing disc from both sides to improve the sealing performance of the valve body;

[0027] After the sealing assembly moves upward above the limiting piece, the fluid in the valve body is adapted to push the sealing disc to move upward.

[0028] The beneficial effects of the present application are that the present application provides a fluid conveying valve, through the arrangement of the sealing assembly and the adjusting assembly, when the valve body is closed, the sealing disc abuts against the positioning ring, and the limiting piece limits the sealing disc from both sides to prevent it from moving upward, thereby improving the sealing effect of the valve body. When the valve body is in an open state, the cooperation of the adjusting disc and the sealing disc can slow down the impact force received by the sealing disc, thereby improving the service life of the valve body. Other features and advantages of the present application will be described in the subsequent specification, and some will become apparent from the specification, or will be understood by those skilled in the art through implementation of the present application. The purposes and other advantages of the present application are achieved and obtained by the structure specifically pointed out in the specification, claims and drawings.

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, a preferred embodiment is described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0031] Figure 1 A perspective view of the fluid conveying valve provided by the embodiment of the present disclosure is shown in the figure.

[0032] Figure 2 A cross-sectional view of the valve body provided by the embodiment of the present disclosure is shown in the figure.

[0033] Figure 3 A perspective view of the sealing assembly and the adjusting assembly provided by the embodiment of the present disclosure is shown in the figure.

[0034] Figure 4 A schematic view of the abutting state of the adjusting disc and the positioning ring provided by the embodiment of the present disclosure is shown in the figure.

[0035] Figure 5 A schematic view of the abutting state of the adjusting disc and the sealing disc provided by the embodiment of the present disclosure is shown in the figure.

[0036] In the figure:

[0037] 1, valve body; 10, water outlet; 11, positioning ring; 12, sealing ring; 13, water outlet pipe;

[0038] 2, sealing assembly; 20, sealing disc; 21, lifting column; 22, limiting pin;

[0039] 3. adjustment assembly; 31. outer sleeve; 32. adjustment disc; 33. rotating disc; 34. compression spring; 35. ring groove;

[0040] 4. stopper; 40. inclined surface. DETAILED DESCRIPTION

[0041] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings, obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0042] In this document, when it is mentioned that a first component is located on a second component, it can mean that the first component can be directly formed on the second component, or a third component can be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0043] In this document, example 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... " when following a list of elements modifies the entire list of elements and not the individual elements of the list. For example, the expression "at least one of a, b, and c" should be understood as including 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.

[0044] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular articles "a," "an," and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps can be employed.

[0045] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0046] Research has revealed the following drawbacks of existing technologies: When fluid passes through a valve, the valve opening is suitable for regulating the fluid flow rate. However, when the fluid flow rate is too fast or the pressure is too high, the fluid exerts a greater impact force on the valve's sealing disc. This causes the lifting column on the sealing disc to move upward more, resulting in increased axial force on the valve's sealing device. Ultimately, this leads to a reduction in the valve's sealing performance and causes fluid leakage.

[0047] Therefore, how to solve the technical problem of reduced sealing performance caused by excessive axial force on the sealing disc is a technical problem that urgently needs to be solved in this field.

[0048] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0051] like Figures 1 to 5 As shown, in some embodiments, a fluid delivery valve is provided, including: a valve body 1; both ends of the valve body 1 are respectively connected to pipelines, and the fluid flows through the left side of the valve body 1 and then flows to the right side of the pipeline.

[0052] The sealing assembly 2 is arranged in the valve body 1 in a lifting manner; when the sealing disc 20 moves downward to abut against the positioning ring 11, the sealing assembly 2 is adapted to seal the valve body 1 to prevent the fluid in the pipeline from passing through the valve body 1. The adjusting assembly 3 is sleeved on the outer wall of the sealing assembly 2 and is threadedly connected with the valve body 1; the adjusting assembly 3 is adapted to rotate circumferentially relative to the valve body 1. The limiting member 4 is arranged in the valve body 1 in a sliding manner and is adapted to limit the sealing disc 20 of the sealing assembly 2; a fixed block is fixed on the outer wall of the valve body 1, the fixed block is hollow inside, and the limiting member 4 is arranged in the fixed block in a sliding manner; optionally, a liquid inlet pipe is communicated with the side wall of the fixed block, the liquid inlet pipe is adapted to deliver lye into the fixed block, and when the limiting member 4 is pushed to move into the fixed block, the lye in the fixed block is adapted to flow into the valve body 1. A flow channel is formed in the limiting member 4 along the length direction, and a one-way valve is arranged in the flow channel; the lye in the flow channel is adapted to flow into the water outlet channel 10 through the one-way valve. The lye in the fixed block is always kept in a normal pressure state. When the limiting member 4 is extruded to move into the fixed block, the limiting member 4 extrudes the lye in the fixed block to flow into the water outlet channel 10 through the one-way valve. When the sealing assembly 2 moves downward to seal the valve body 1, the two limiting members 4 are adapted to limit the sealing disc 20 from both sides; the arrangement of the limiting member 4 avoids the situation that the sealing disc 20 is pushed upward by the fluid in the valve body 1, and improves the sealing effect between the sealing disc 20 and the positioning ring 11. When the adjusting assembly 3 is screwingly moved downward to abut against the sealing disc 20, the sealing assembly 2 and the adjusting assembly 3 are linked, that is, when the outer sleeve 31 is screwingly moved upward, the lifting column 21 can be synchronously moved upward. When the adjusting assembly 3 is reversely rotated, the sealing assembly 2 is synchronously moved upward with the adjusting assembly 3 to open the valve body 1. When the sealing disc 20 is separated from the positioning ring 11, the water flow in the valve body 1 is adapted to push the sealing disc 20 to move upward and downward relative to the adjusting disc 32 to realize the effect of automatically adjusting the fluid pressure in the valve body 1. When the sealing disc 20 abuts against the positioning ring 11, the valve body 1 is closed, the limiting member 4 delivers lye into the water outlet channel 10, and the lye and the acidic fluid remaining in the valve body 1 are neutralized to reduce the corrosion of the adjusting disc 32 and the compression spring 34 by the pickling fluid.

[0053] Reference is made to the accompanying drawings Figure 2The sealing assembly 2 comprises a sealing disc 20 which is in sliding sealing with the inner wall of the water outlet channel 10 in the valve body 1; the sealing disc 20 is adapted to move vertically in the water outlet channel 10; a lifting column 21 is fixed on the sealing disc 20 and is adapted to move up and down in the valve body 1. The upper end of the lifting column 21 protrudes from the adjusting assembly 3 and is adapted to move vertically relative to the adjusting assembly 3. Optionally, a containing groove is formed in the sidewall of the lifting column 21 in a radial direction, and a limiting pin 22 is slidingly arranged in the containing groove; the limiting pin 22 is in abutment with the inner wall of the outer sleeve 31; when the outer sleeve 31 moves downward spirally until the adjusting disc 32 is in abutment with the sealing disc 20, the limiting pin 22 protrudes from the containing groove and is in abutment with the upper surface of the rotating disc 33; at this time, when the outer sleeve 31 moves upward spirally, the lifting column 21 is adapted to move upward synchronously.

[0054] Further, a positioning ring 11 is fixed circumferentially on the inner wall of the water outlet channel 10, and the sealing disc 20 is adapted to be in abutment with the positioning ring 11. The inner diameter of the positioning ring 11 is smaller than the diameter of the sealing disc 20; when the lifting column 21 moves downward to drive the sealing disc 20 to move downward until the sealing disc 20 is in abutment with the positioning ring 11, the sealing disc 20 is adapted to seal the water outlet channel 10.

[0055] Reference is made to the accompanying drawings Figure 2 The adjusting assembly 3 comprises an outer sleeve 31 which is sleeved on the outer wall of the lifting column 21 and is in sliding sealing with the lifting column 21; the outer wall of the outer sleeve 31 is threadedly adapted with the valve body 1; the outer sleeve 31 is adapted to move upward or downward spirally relative to the valve body 1. An adjusting disc 32 is fixed on the lower bottom of the outer sleeve 31 and is arranged above the sealing disc 20; the adjusting disc 32 is adapted to be in abutment with the sealing disc 20. A rotating disc 33 is fixed on the upper end of the outer sleeve 31; when the rotating disc 33 is rotated, the outer sleeve 31 is adapted to be driven to rotate spirally; and the rotating disc 33 is arranged at the upper end of the valve body 1.

[0056] A compression spring 34 is sleeved on the outer wall of the lifting column 21; the lower end of the compression spring 34 is fixed on the sealing disc 20, and the upper end of the compression spring 34 is in abutment with the bottom wall of the adjusting disc 32. A ring groove 35 is formed in the bottom wall of the adjusting disc 32; the ring groove 35 is arranged at the position of the adjusting disc 32 which is close to the lifting column 21; and the compression spring 34 is adapted to be contracted in the ring groove 35. When the sealing disc 20 and the adjusting disc 32 are in abutment, the compression spring 34 is adapted to be contracted in the ring groove 35. At this time, when the outer sleeve 31 drives the adjusting disc 32 to move upward, the adjusting disc 32 is adapted to push the two limiting members 4 to move outward in the process of moving upward; and the sealing disc 20 and the lifting column 21 move upward synchronously with the adjusting disc 32.

[0057] Further, in order to improve the sealing of the valve body 1, a sealing ring 12 is fixed to the inner wall of the water outlet 10, and the inner ring of the sealing ring 12 is in abutment with the outer wall of the outer sleeve 31. The outer wall of the outer sleeve 31 in abutment with the sealing ring 12 is smooth. The sealing ring 12 is arranged above the adjusting disc 32, and the adjusting disc 32 is adapted to abut against the sealing ring 12. The adjusting disc 32 is moved upward to abut against the sealing ring 12, and the sealing ring 12 is adapted to limit the adjusting disc 32.

[0058] Further, the valve body 1 is provided with a water outlet pipe 13, and the water inlet of the water outlet pipe 13 is arranged above the positioning ring 11. The water outlet of the water outlet pipe 13 is arranged on the right side of the water outlet 10.

[0059] Reference is made to the accompanying drawings Figure 3 One end of the limiting piece 4 close to the sealing disc 20 is provided with a slope 40, and the limiting piece 4 is arranged between the water inlet box and the positioning ring 11. When the sealing disc 20 is moved downward to abut against the slope 40, the sealing disc 20 continues to move downward, and is adapted to push the limiting piece 4 to shrink into the fixed block, and at the same time, the lye in the fixed block is adapted to flow into the water outlet 10, and the lye can neutralize the acid in the water outlet 10.

[0060] Further, the bottom wall of the sealing disc 20 is in a circular arc shape, and the sealing disc 20 is adapted to push the limiting piece 4 to move outward when the sealing disc 20 is moved downward. The upper top wall of the adjusting disc 32 is in a circular arc shape, and the adjusting disc 32 is adapted to push the limiting piece 4 to move outward when the adjusting disc 32 is moved upward. When the adjusting disc 32 abuts against the sealing disc 20, and the adjusting disc 32 is moved upward, the sealing disc 20 is moved upward synchronously, and the adjusting disc 32 is adapted to push the two limiting pieces 4 to shrink into the fixed block, so that the sealing disc 20 is moved above the limiting piece 4.

[0061] Some embodiments provide a working method of a delivery valve, comprising:

[0062] When the sealing valve body 1 is needed, the sealing assembly 2 is moved downward to seal the valve body 1, and the two limiting pieces 4 are adapted to limit the sealing disc 20 from both sides to improve the sealing of the valve body 1.

[0063] After the sealing assembly 2 is moved upward above the limiting piece 4, the fluid in the valve body 1 is adapted to push the sealing disc 20 to move upward.

[0064] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, 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] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, terms such as "first", "second" and other numerical terms are used herein, unless otherwise explicitly indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0066] Spatially relative terms, such as "inner", "outer", "below", "below", "lower", "above", "upper", and the like, can be used herein to facilitate the description of the relationship of one element or feature to another element or feature as illustrated in the drawings. In addition to the orientation depicted in the drawings, the spatially relative terms can be intended to cover different orientations of the device in use or operation. For example, if the device in the drawing is turned over, the element described as "below" or "under" the other element or feature will be oriented "above" the other element or feature. Therefore, the example term "below" can cover the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0067] In the above discussion, unless otherwise stated, the terms "about", "approximately", "substantially" and the like mean a + / - 10% variation of the value when used to describe numerical values.

[0068] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined by the scope of the claims.

Claims

1. A delivery valve for a fluid, characterized by The utility model relates to a fluid delivery valve, including: The fixed block side wall is communicated with a liquid inlet pipe, and the liquid inlet pipe is suitable for conveying lye into the fixed block; Sealing assembly (2) is lifted and is arranged in the valve body (1); Adjusting assembly (3) is sleeved in the outer wall of sealing assembly (2), and is suitable for the screw thread of valve body (1); Limiting piece (4) is slidably arranged in the communication channel of valve body (1) and fixed block, and is suitable for limiting sealing disc (20) of sealing assembly (2); The limiting piece (4) is provided with a flow channel along the length direction, and a one-way valve is arranged in the flow channel, and the lye in the flow channel is suitable for flowing into the valve body (1) after passing through the one-way valve; The adjusting assembly (3) includes: sleeve (31) is sleeved in the outer wall of lifting column (21), and the outer wall is suitable for the screw thread of valve body (1); Adjusting disc (32) is fixed in the lower bottom of sleeve (31), and is arranged above sealing disc (20); Rotary disc (33) is fixed in the upper end of sleeve (31); The bottom wall of sealing disc (20) is circular arc, and sealing disc (20) is suitable for pushing limiting piece (4) to move outward when moving downward; The upper top wall of adjusting disc (32) is circular arc, and adjusting disc (32) is suitable for pushing limiting piece (4) to move outward when moving upward; When sealing assembly (2) moves downward to sealing valve body (1), the two limiting pieces (4) are suitable for limiting sealing disc (20) from both sides; After adjusting assembly (3) is spirally moved downward to the lower end of adjusting assembly (3) and sealing disc (20) abuts, the adjusting assembly (3) is reversely rotated, and sealing assembly (2) is synchronously moved upward with adjusting assembly (3) to open valve body (1).

2. The fluid delivery valve of claim 1, wherein The sealing assembly (2) comprises: Sealing disc (20) is slidably sealed with the inner wall of the water outlet channel (10) in the valve body (1); Lifting column (21) is fixed on the sealing disc (20), and is suitable for moving up and down in the valve body (1).

3. The fluid delivery valve of claim 2, wherein The inner wall of the water outlet channel (10) is circumferentially fixed with a positioning ring (11), and the sealing disc (20) is suitable for abutting against the positioning ring (11).

4. The fluid delivery valve of claim 3, wherein The outer wall of the lifting column (21) is sleeved with a compression spring (34), the lower end of the compression spring (34) is fixed on the sealing disc (20), and the upper end of the compression spring (34) abuts against the bottom wall of the adjusting disc (32).

5. The fluid delivery valve of claim 4, wherein The inner wall of the water outlet channel (10) is fixed with a sealing ring (12), the sealing ring (12) is arranged above the adjusting disc (32), and the adjusting disc (32) is suitable for abutting against the sealing ring (12).

6. The fluid delivery valve of claim 5, wherein ​ The valve body (1) is provided with a water outlet pipe (13), and the water inlet of the water outlet pipe (13) is arranged above the positioning ring (11).

7. The fluid delivery valve of claim 6, wherein, The limiting piece (4) is provided with an inclined surface (40) at one end close to the sealing disc (20), and the limiting piece (4) is arranged between the water inlet and the positioning ring (11).

8. The fluid delivery valve of claim 7, wherein, The adjusting disc (32) is provided with a ring groove (35) in the bottom wall, the ring groove (35) is arranged at the adjusting disc (32) close to the lifting column (21), and the compression spring (34) is adapted to be contracted in the ring groove (35).

9. A method of operating a delivery valve using a delivery valve for fluids as claimed in any one of claims 1 to 8, characterized in that Including: When the sealing valve body (1) is needed, the sealing assembly (2) is moved downward to the sealing valve body (1), and the two limiting pieces (4) are adapted to limit the sealing disc (20) from both sides to improve the sealing performance of the valve body (1); After the sealing assembly (2) is moved upward above the limiting piece (4), the fluid in the valve body (1) is adapted to push the sealing disc (20) to move upward.

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