Eccentric hemispherical valve and assembly method thereof

Abstract

The present invention relates to the field of valve technology, and in particular to an eccentric hemispherical valve and an assembly method thereof. An eccentric hemispherical valve comprises a valve body, an adjusting assembly and a valve seat assembly, wherein the valve seat assembly is located inside the valve body, an adjusting hole is provided on one side of the valve body, one end of the adjusting assembly is passed through the adjusting hole and connected to the valve seat assembly, and the other end is located outside the adjusting hole, and the adjusting assembly is adjusted to drive the valve seat assembly to move inside the valve body, and the valve seat assembly is sealed against the valve body. An eccentric hemispherical valve assembly method comprises the following steps: placing the valve seat assembly inside the valve body; passing one end of the adjusting assembly through the adjusting hole and connecting it to the valve seat assembly; adjusting the adjusting assembly, and driving the valve seat assembly to move inside the valve body, and sealing between the valve seat assembly and the valve body. The advantages of the present invention are: easy assembly and adjustable position of the valve seat assembly.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to an eccentric hemispherical valve and an assembling method thereof. Background Art

[0002] Eccentric hemispherical valves are usually installed on pipelines that convey fluids to control the opening / closing of the pipelines to achieve control of the flow of fluids. Existing eccentric hemispherical valves generally include valve seats, valve bodies, valve cores and other components. The valve seats are forcibly pressed into the valve body by components such as jacks, which is not only extremely inconvenient to install, but also has large errors in the valve seats after installation. It is difficult to ensure that the gaps around the valve seats and the valve body are uniform, which is not conducive to the sealing of the eccentric hemispherical valve. Summary of the invention

[0003] Based on this, it is necessary to provide an eccentric hemispherical valve with an easy and adjustable valve seat and an eccentric hemispherical valve installation method in order to solve the above technical problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An eccentric hemispherical valve comprises a valve body and a valve seat assembly, wherein the valve seat assembly is located inside the valve body and is characterized in that the eccentric hemispherical valve also comprises an adjusting assembly, an adjusting hole connected to the interior of the valve body is opened on one side of the valve body, one end of the adjusting assembly is passed through the adjusting hole and connected to the valve seat assembly, and the other end is located outside the adjusting hole, the adjusting assembly is adjusted to drive the valve seat assembly to approach or move away from the valve body, and the valve seat assembly is sealed against the valve body.

[0006] In the present application, an adjusting component is provided, so that the valve seat component is driven to move by adjusting the adjusting component to achieve the installation of the valve seat component; at the same time, the adjusting component is connected to the valve seat component, so as to have a certain limiting and guiding effect on the valve seat component, which can ensure that the gap around the valve seat component and the valve body is uniform during installation, that is, it can ensure that the axis of the valve seat component coincides with the axis of the outlet valve body, so that the installation of the valve seat component will not be offset, thereby making the overall sealing of the eccentric hemispheric valve better when it is closed; secondly, the adjusting component can drive the valve seat component to approach or move away from the valve body, so that the position of the valve seat assembly in the valve body can be adjusted, so that the valve seat assembly can better cooperate with the sealing seat of the valve body to achieve sealing, thereby avoiding leakage points in the seal of the eccentric hemispheric valve.

[0007] In one embodiment, the adjustment assembly includes an adjustment screw and a locking unit, a threaded hole is provided on the valve seat assembly, and one end of the adjustment screw is threadedly connected to the threaded hole. The locking unit of the eccentric hemispherical valve is arranged at one end of the adjustment screw outside the adjustment hole, and the locking unit locks the adjustment screw when the adjustment screw drives the valve seat assembly to move to a predetermined position. It can be understood that the setting of the locking unit can ensure that the position of the valve seat assembly remains unchanged after adjustment.

[0008] In one of the embodiments, the eccentric hemispherical valve also includes a fine-tuning rod, and a fine-tuning hole is also opened in the circumferential direction on the same side of the valve body and the adjusting hole. One end of the fine-tuning rod is passed through the fine-tuning hole and is threadedly connected to the fine-tuning hole, and the fine-tuning rod is pressed against one side of the valve seat assembly.

[0009] It is understandable that by providing a fine-tuning rod, the position of the valve seat assembly can be fine-tuned to reduce the error in installing the valve seat assembly; at the same time, the fine-tuning rod and the adjustment assembly cooperate with each other to make the installation of the valve seat assembly more convenient and quick.

[0010] In one embodiment, the number of the adjustment holes and the fine-tuning holes are respectively multiple, each of the adjustment holes corresponds to an adjustment component, each of the fine-tuning holes corresponds to a fine-tuning rod, the multiple adjustment holes and the multiple fine-tuning holes are respectively distributed along the circumference of one side of the valve body, and at least one fine-tuning hole is provided between two adjacent adjustment holes.

[0011] In one embodiment, the valve seat assembly includes a mounting seat, a sealing seat and a retaining ring, the sealing seat is sealingly mounted on the mounting seat, the adjusting assembly is connected to the mounting seat, and the mounting seat can be sealingly connected to the valve body, the sealing seat has a limiting step on its outer surface, and the retaining ring can cooperate with the limiting step to limit the sealing seat from axial movement and separation from the mounting seat.

[0012] It is understandable that the retaining ring is provided to prevent the sealing seat from being forced to separate from the mounting seat, thereby preventing the occurrence of sealing failure and the like.

[0013] In one embodiment, a mounting groove is provided on the inner wall of the valve body, and the retaining ring is rotatably fixed in the mounting groove.

[0014] In one of the embodiments, the eccentric hemispherical valve further includes a valve stem and a valve core, wherein the valve stem is installed inside the valve body, and the axis of the valve stem is perpendicular to the medium flow direction in the eccentric hemispherical valve, the valve core is vertically installed on the valve stem, and the valve core can rotate relative to the valve stem from a vertical direction toward the medium flow direction to cooperate with the valve seat assembly to seal the eccentric hemispherical valve.

[0015] In one of the embodiments, the eccentric hemispherical valve further includes a limit member, which is installed inside the valve body and located below the movement trajectory of the valve core so as to contact the valve core and limit the movement of the valve core when the valve core rotates and seals with the valve seat assembly.

[0016] It can be understood that the setting of the limit member can limit the movement of the valve core assembly, thereby preventing the eccentric hemispheric valve from being over-closed and causing damage to the sealing surfaces on the valve core assembly and / or the valve seat assembly, ensuring that the sealing gap is uniform up and down, and preventing the seal from failing when under pressure; secondly, when the eccentric hemispheric valve is closed, the limit member can play a certain supporting role on the valve core assembly, thereby preventing the connection point between the valve core assembly and the valve body from being deformed due to force.

[0017] The present invention also provides the following technical solutions:

[0018] An eccentric hemispherical valve assembly method, wherein the eccentric hemispherical valve adopts the eccentric hemispherical valve described above; the assembly method comprises the following steps:

[0019] placing the valve seat assembly into the valve body;

[0020] Pass one end of the adjusting assembly through the adjusting hole and connect it to the valve seat assembly; and

[0021] The adjusting assembly is adjusted to drive the valve seat assembly to approach or move away from the valve body, and the valve seat assembly and the valve body are sealed.

[0022] It can be understood that the above assembly method can realize the installation of the valve seat assembly and the adjustment of the position of the valve seat assembly through the adjustment assembly, which is not only convenient for installation but also has a better sealing effect of the eccentric hemispheric valve.

[0023] In one embodiment, the eccentric hemispherical valve further includes a retaining ring, and a mounting groove is provided on the inner wall of the valve body; after the step of placing the valve seat assembly into the valve body, the eccentric hemispherical valve assembly method further includes the following steps:

[0024] Put the retaining ring into the valve body;

[0025] The retaining ring is rotated to make the retaining ring snap into the installation groove.

[0026] Compared with the prior art, the eccentric hemispheric valve is provided with an adjusting component, thereby using the adjusting component to drive the valve seat component to move so as to achieve the installation of the valve seat component; at the same time, the adjusting component is connected to the valve seat component, so as to have a certain limiting and guiding effect on the valve seat component, which can ensure that the gap around the valve seat component and the valve body is uniform during installation, that is, it can ensure that the axis of the valve seat component coincides with the axis of the outlet, so that the installation of the valve seat component will not be offset, thereby making the overall sealing of the eccentric hemispheric valve better when it is closed; secondly, the adjusting component can drive the valve seat component to approach or move away from the valve body, thereby adjusting the position of the valve seat component in the valve body, so that the valve seat component can better cooperate with the sealing seat of the valve body to achieve sealing, thereby avoiding leakage points in the sealing of the eccentric hemispheric valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A one-view cross-sectional view of an eccentric hemispherical valve provided in the present application;

[0028] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0029] Figure 3 A structural schematic diagram of the eccentric hemispherical valve provided in this application from another perspective;

[0030] Figure 4 for Figure 1 A partial enlarged view of point B in the middle;

[0031] Figure 5 A schematic diagram of the structure of the retaining ring provided in this application being placed in the valve body;

[0032] Figure 6 A schematic diagram of the structure provided in this application, which is rotated 90 degrees and installed on the valve body;

[0033] Figure 7 A step diagram of the eccentric hemispherical valve assembly method provided in this application.

[0034] In the figure, an eccentric hemispheric valve 100, a valve body 10, an inlet 11, an outlet 12, a valve cavity 13, a mounting groove 131, an adjusting hole 14, a valve cover 15, a lifting ring 151, a fine-tuning hole 16, a valve seat assembly 20, a mounting seat 21, a mounting step 211, a valve port 212, a sealing seat 22, a limiting step 221, a supporting portion 222, a retaining ring 23, an adjusting assembly 30, an adjusting screw 31, a locking unit 32, a locking piece 321, a gasket 322, a fine-tuning rod 40, a valve core assembly 50, a valve stem 51, a valve core 52, a limiting piece 60, and an eccentric hemispheric valve assembly method 200 are shown. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0038] like Figure 1 As shown, the present invention provides an eccentric hemispherical valve 100, which is installed on a pipeline and is used to open / close the pipeline to control the flow of the fluid in the pipeline. Here, the fluid can be water, gas, etc.

[0039] Specifically, the eccentric hemispheric valve 100 includes a valve body 10, a valve seat assembly 20 and an adjusting assembly 30. The valve seat assembly 20 is located inside the valve body 10. An adjusting hole 14 communicating with the interior of the valve body 10 is opened on one side of the valve body 10. One end of the adjusting assembly 30 is passed through the adjusting hole 14 and connected to the valve seat assembly 20, and the other end is located outside the adjusting hole 14. The adjusting assembly 30 is adjusted to drive the valve seat assembly 20 inside the valve body 10 and make the valve seat assembly 20 sealingly abut against the valve body 10.

[0040] It can be understood that the adjusting component 30 is used to drive the valve seat component 20 to move so as to achieve the installation of the valve seat component 20; at the same time, the adjusting component 30 is connected to the valve seat component 20, so as to have a certain limiting and guiding effect on the valve seat component 20, which can ensure that the gap around the valve seat component 20 and the valve body 10 is uniform during installation, that is, it can ensure that the axis of the valve seat component 20 coincides with the axis of the outlet valve body 10, so that the installation of the valve seat component 20 will not be offset, so that the overall sealing of the eccentric hemispheric valve is better when it is closed; secondly, the adjusting component 30 can drive the valve seat component 20 to approach or move away from the valve body 10, so as to adjust the position of the valve seat component 20 in the valve body 10, so that the valve seat component 20 can better cooperate with the sealing seat of the valve body 10 to achieve sealing, and avoid leakage points in the sealing of the eccentric hemispheric valve.

[0041] It should be explained that the error in the installation of the valve seat assembly 20 is the key point to ensure the sealing effect of the eccentric semi-ball valve 100, because the valve seat assembly 20 cooperates with the valve core assembly in the eccentric semi-ball valve 100 to achieve the sealing of the eccentric semi-ball valve 100. If the gap around the valve seat assembly 20 and the valve body 10 is uneven, it is easy for the valve core assembly and the valve seat assembly 20 to be relatively offset when they cooperate to seal, thereby causing the sealing failure of the eccentric semi-ball valve 100.

[0042] Furthermore, the valve body 10 has an inlet 11, an outlet 12 and a valve cavity 13, the valve cavity 13 is located at the inlet 11 and the outlet 12, the valve seat assembly 20 is accommodated in the valve cavity 13 and is located at the outlet 12, the adjustment hole 14 is located on the side wall at the outlet 12 of the valve body 10, and is connected to the valve cavity 13, the adjustment assembly 30 drives the valve seat assembly 20 to approach or move away from the inlet or outlet 12, and makes the valve seat assembly 20 sealingly abut against the valve body 10.

[0043] Optionally, the axis of the regulating hole 14 is arranged in parallel with the axis of the valve body 10. In this embodiment, the axis of the valve body 10 is coincident with or parallel to the axis of the inlet 11 or the axis of the outlet 12, that is, the axis of the regulating hole 14 is parallel to the axis of the inlet 11 or the axis of the outlet 12. Of course, in other embodiments, the axis of the regulating hole 14 may not be parallel to the axis of the valve body 10, and its specific arrangement can be set according to actual installation conditions or requirements.

[0044] Preferably, the outlet 12 of the valve body 10 has a step 14 , and the valve seat assembly 20 is disposed at the step 14 .

[0045] Furthermore, a valve cover 15 is provided at one end of the valve body 10, and the valve cover 15 is sealedly covered on the valve body 10 and forms the valve cavity 13 with the valve body 10. Preferably, the valve cover 15 is connected to the valve body 10 through a plurality of screws.

[0046] Optionally, a hanging buckle 151 is connected to the valve cover 15 , and the hanging buckle 151 is used to cooperate with external lifting equipment to achieve the transportation of the eccentric hemispherical valve 100 .

[0047] like Figure 2 As shown, the valve seat assembly 20 includes a mounting seat 21 and a sealing seat 22 . The sealing seat 22 is sealingly mounted on the mounting seat 21 . The adjustment assembly 30 is connected to the mounting seat 21 , and the mounting seat 21 can be sealingly connected to the valve body 10 .

[0048] Preferably, the mounting seat 21 is located at the step 14 , and a seal (not marked in the figure) is provided on the mounting seat 21 , and the seal is used to seal with the step surface of the step 14 to achieve a sealed connection between the mounting seat 21 and the valve body 10 .

[0049] Furthermore, the mounting seat 21 has a mounting step 211 , the sealing seat 22 is annular, and the inner ring of the sealing seat 22 is sealingly sleeved on the mounting step 211 .

[0050] Preferably, the mounting seat 21 has a valve port 212 , and the valve port 212 is connected to the inlet 11 or the outlet 12 . The eccentric hemispherical valve 100 controls the connection or closing between the inlet 11 and the outlet 12 by controlling the opening and closing of the valve port 212 .

[0051] Furthermore, the valve seat assembly 20 also includes a retaining ring 23 . The outer surface of the sealing seat 22 has a limiting step 221 . The retaining ring 23 can cooperate with the limiting step 221 to limit the sealing seat 22 from axial movement and separation from the mounting seat 21 .

[0052] It can be understood that the setting of the limiting step 221 forms a supporting portion 222 on the outer surface of the sealing seat 22, and the supporting portion 222 can abut against the retaining ring 23 to block or limit the movement of the sealing seat 22 along the axial direction of the inlet 11, thereby preventing the sealing seat 22 from being separated from the mounting seat 21 due to the pipeline pressure, resulting in sealing failure and the like.

[0053] Specifically, Figure 5 and Figure 6 As shown, the inner wall of the valve cavity 13 has a mounting groove 131, and the retaining ring 23 is rotatably inserted into the mounting groove 131 and fixed by a positioning member. Here, the positioning member can be a bolt, a screw or the like.

[0054] Preferably, in this embodiment, the retaining ring 23 is rotated 90 degrees to fit into the mounting groove 131. It is understandable that the retaining ring 23 is installed by rotation, which is not only convenient for installation but also easy for disassembly; at the same time, the mounting groove 131 is used for limiting to prevent the sealing seat 22 from falling out, and the structure is simple.

[0055] like Figure 2 As shown, the adjusting components 30 can be multiple groups, and each group of adjusting components 30 corresponds to an adjusting hole 14, that is, the number of the adjusting holes 14 is multiple, and the multiple adjusting holes are evenly distributed along the circumference of one side of the valve body 10, and the multiple groups of adjusting components 30 are inserted into the adjusting holes 14 one by one and connected to the valve seat assembly 20.

[0056] Preferably, the number of the adjusting components 30 may be 4, 6, 8, etc. The specific number may be set according to the actual size of the valve body 10 or the installation requirements of the valve seat component 20, which will not be described in detail here.

[0057] Furthermore, each group of the adjusting components 30 includes an adjusting screw 31 , and a threaded hole 23 is formed on the valve seat component 20 . One end of the adjusting screw 31 extends into the adjusting hole 14 and is threadedly connected to the threaded hole 23 .

[0058] Preferably, the threaded hole 23 is located on a side of the mounting seat 21 away from the sealing seat 22 .

[0059] Furthermore, the adjusting assembly 30 also includes a locking unit 32, which is arranged at one end of the adjusting screw 31 outside the adjusting hole 14. When the adjusting screw 31 drives the valve seat assembly 20 to move to a predetermined position, the locking unit 32 locks the adjusting screw 31 to ensure that the position of the valve seat assembly 20 remains unchanged after adjustment.

[0060] Specifically, the locking unit 32 includes a locking member 321 and a gasket 322. The gasket 322 is sleeved on the adjusting screw 31 and abuts against the valve body 10. The locking member 321 is threadedly connected to the adjusting screw 31 and abuts against the gasket 322 when locking the adjusting screw 31. It can be understood that the gasket 33 can provide a force for locking the locking member 32, prevent the locking member 32 from being separated from the adjusting screw 31, and improve the reliability of the locking of the locking member 32.

[0061] Of course, in other embodiments, the locking unit 32 may also adopt other structures as long as it can lock the adjusting screw 31 .

[0062] like Figure 3 and Figure 4As shown, the eccentric hemispherical valve 100 further includes a fine-adjustment rod 40, and a fine-adjustment hole 16 is also opened in the circumferential direction of the valve body 10 on one side of the adjustment hole 14, one end of the fine-adjustment rod 40 is passed through the fine-adjustment hole 16 and is threadedly connected to the fine-adjustment hole 16, and the fine-adjustment rod 40 presses against one side of the valve seat assembly 20. , so that the position of the valve seat assembly 20 can be fine-adjusted to reduce the installation error of the valve seat assembly 20; at the same time, the fine-adjustment rod 40 cooperates with the adjustment assembly 30, making the installation of the valve seat assembly 20 more convenient and quick.

[0063] Furthermore, there may be multiple fine-tuning rods 40, each of which corresponds to a fine-tuning hole 16, that is, there are multiple fine-tuning holes 16, and the multiple fine-tuning holes 16 are evenly distributed along the circumference of one side of the valve body 10, and multiple groups of fine-tuning rods 40 are inserted into the fine-tuning holes 16 one by one and abut against the valve seat assembly 20.

[0064] Preferably, the fine-tuning rod 40 is a screw rod.

[0065] There is at least one fine-tuning hole 16 between two adjacent adjustment holes 14, that is, at least one fine-tuning rod 40 is provided between two adjacent groups of adjustment components 30. It can be understood that by arranging the adjustment components 30 and the fine-tuning rod 40 in the above manner, the adjustment accuracy of the valve seat assembly 20 can be further improved.

[0066] In this embodiment, there is a fine-tuning hole 16 between two adjacent adjustment holes 14, that is, each fine-tuning hole 16 is arranged adjacent to two adjustment holes 14. Of course, in other embodiments, 2 or 3 fine-tuning holes 16 may be arranged between two adjacent adjustment holes 14 according to actual conditions.

[0067] like Figure 3 and Figure 4 As shown, the eccentric semi-ball valve 100 further includes a valve core assembly 50 , which is rotatably installed in the valve cavity 13 and can be sealed and matched with the valve seat assembly 20 to control the opening / closing of the eccentric semi-ball valve 100 .

[0068] Preferably, the valve core assembly 50 cooperates with the sealing seat 22 to seal the valve port 212 , thereby controlling the opening and closing of the valve port 212 , thereby achieving the purpose of controlling the opening / closing of the eccentric hemispherical valve 100 .

[0069] Specifically, the valve core assembly 50 includes a valve stem 51 and a valve core 52. The valve stem 51 is installed inside the valve body 10, and the axis of the valve stem 51 is perpendicular to the medium flow direction in the eccentric hemispherical valve. The valve core 52 is vertically installed on the valve stem 51, and the valve core 52 can rotate relative to the valve stem 51 from the vertical direction to the medium flow direction to cooperate with the valve seat assembly 20 to seal the eccentric hemispherical valve 100, that is, to control the opening / closing of the eccentric hemispherical valve 100.

[0070] Please continue reading Figure 4 The eccentric hemispheric valve 100 also includes a limit member 60, which is installed inside the valve body 10 and is located below the movement trajectory of the valve core 52, so as to contact the valve core 52 and limit the movement of the valve core 52 when the valve core 52 rotates and seals with the valve seat assembly 20.

[0071] It can be understood that the setting of the limit member 60 can limit the movement of the valve core assembly 50, thereby preventing the eccentric hemispherical valve from being over-closed and causing damage to the sealing surface of the valve core assembly 50 and / or the valve seat assembly 20, ensuring that the sealing gap is uniform up and down, and preventing the seal from failing when under pressure; secondly, when the eccentric hemispherical valve is closed, the limit member 60 can play a certain supporting role on the valve core assembly 50, thereby preventing the connection point between the valve core assembly 50 and the valve body 10 from being deformed due to force.

[0072] like Figure 7 As shown, the present invention further provides an eccentric hemispherical valve assembly method 200, which is implemented based on the structure of the eccentric hemispherical valve 100, and the assembly method 100 includes the following steps:

[0073] S1: placing the valve seat assembly 20 into the valve body 10;

[0074] S2: passing one end of the adjustment assembly 30 through the adjustment hole 14 and connecting it to the valve seat assembly 20; and

[0075] S3 adjusts the adjusting assembly 30 , drives the valve seat assembly 20 to move in the valve body 10 , and seals the valve seat assembly 20 and the valve body 10 .

[0076] It can be understood that the above-mentioned assembly method 200 can not only accurately install the valve seat assembly 20 in the valve body 10 under the action of the adjusting assembly 30, ensuring a uniform gap between the valve seat assembly 20 and the valve body 10, thereby reducing the difficulty of assembly; moreover, the position of the valve seat assembly 20 in the valve body 10 can be adjusted by the adjusting assembly 30. When performing a pressure test on an eccentric hemispherical valve for leakage, the displacement of the valve seat assembly 20 in the valve body 10 can be adjusted by the adjusting assembly 30, thereby sealing the leakage point.

[0077] Furthermore, between step S1 and step S2, the assembly method 100 further includes the following steps:

[0078] S11: placing the retaining ring 23 into the valve body 10;

[0079] S12: rotating the retaining ring 23 to insert the retaining ring 23 into the installation groove 131.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An eccentric hemispherical valve, comprising a valve body and a valve seat assembly, wherein the valve seat assembly is located inside the valve body, and is characterized in that: The eccentric hemispherical valve further comprises an adjusting assembly, an adjusting hole communicating with the interior of the valve body is opened on one side of the valve body, one end of the adjusting assembly is passed through the adjusting hole and connected to the valve seat assembly, and the other end is located outside the adjusting hole, the adjusting assembly is adjusted to drive the valve seat assembly to move within the valve body, and the valve seat assembly is sealed against the valve body; The valve seat assembly includes a mounting seat, a sealing seat and a retaining ring. The sealing seat is sealingly mounted on the mounting seat. The adjusting assembly is connected to the mounting seat, and the mounting seat can be sealingly connected to the valve body. A limiting step is provided on the outer surface of the sealing seat, and the retaining ring can cooperate with the limiting step to limit the sealing seat from axial movement and separation from the mounting seat.

2. The eccentric hemispherical valve according to claim 1, characterized in that: The adjusting assembly includes an adjusting screw and a locking unit. A threaded hole is opened on the valve seat assembly. One end of the adjusting screw extending into the adjusting hole is threadedly connected to the threaded hole. The locking unit is arranged at one end of the adjusting screw located outside the adjusting hole. The locking unit is used to lock the adjusting screw when the adjusting screw drives the valve seat assembly to move to a predetermined position.

3. The eccentric hemispherical valve according to claim 1 or 2, characterized in that: The eccentric hemispherical valve also includes a fine-tuning rod. The valve body is provided with a fine-tuning hole in the circumferential direction on one side of the adjustment hole. One end of the fine-tuning rod is passed through the fine-tuning hole and is threadedly connected to the fine-tuning hole, and the fine-tuning rod is pressed against one side of the valve seat assembly.

4. The eccentric hemispherical valve according to claim 3, characterized in that: The number of the adjustment holes and fine-tuning holes is respectively multiple, each of the adjustment holes corresponds to an adjustment component, each of the fine-tuning holes corresponds to a fine-tuning rod, the multiple adjustment holes and the multiple fine-tuning holes are respectively distributed along the circumference of one side of the valve body, and at least one fine-tuning hole is provided between two adjacent adjustment holes.

5. The eccentric hemispherical valve according to claim 1, characterized in that: An installation groove is provided on the inner wall of the valve body, and the retaining ring is rotatably fixed in the installation groove.

6. The eccentric hemispherical valve according to claim 1, characterized in that: The eccentric hemispherical valve also includes a valve stem and a valve core. The valve stem is installed inside the valve body, and the axis of the valve stem is perpendicular to the medium flow direction in the eccentric hemispherical valve. The valve core is vertically installed on the valve stem, and the valve core can rotate relative to the valve stem from the vertical direction to the medium flow direction to cooperate with the valve seat assembly to seal the eccentric hemispherical valve.

7. The eccentric hemispherical valve according to claim 6, characterized in that: The eccentric hemispherical valve also includes a limiter installed inside the valve body and located below the movement trajectory of the valve core so as to contact the valve core and limit the movement of the valve core when the valve core rotates and seals with the valve seat assembly.

8. An eccentric hemispherical valve assembly method, wherein the eccentric hemispherical valve is the eccentric hemispherical valve according to claim 1; the assembly method comprises the following steps: placing the valve seat assembly into the valve body; Pass one end of the adjusting assembly through the adjusting hole and connect it to the valve seat assembly; and The adjusting assembly is adjusted to drive the valve seat assembly to move in the valve body and seal the valve seat assembly with the valve body.

9. The eccentric hemispherical valve assembly method according to claim 8, wherein the eccentric hemispherical valve further comprises a retaining ring, and an inner wall of the valve body is provided with a mounting groove; after the step of placing the valve seat assembly into the valve body, the eccentric hemispherical valve assembly method further comprises the following steps: Put the retaining ring into the valve body; The retaining ring is rotated to make the retaining ring snap into the installation groove.

Images