Eccentric C-shaped ball valve and installation method of valve seat

Abstract

The invention relates to the technical field of valves, and discloses an eccentric C-shaped ball valve and a mounting method of a valve seat, the eccentric C-shaped ball valve comprises a valve body and the valve seat, the valve body is integrally arranged and is provided with a valve cavity, the valve body is further provided with a fluid channel communicated with the valve cavity, the valve body is provided with a mounting part, and the mounting part is arranged on one side in the valve cavity and surrounds the fluid channel; the valve seat is suitable for being arranged in the mounting part under the action of external force, the valve seat is provided with a first abutting surface, a second abutting surface and a sealing surface, when the valve seat is mounted in the mounting part, the first abutting surface and the second abutting surface abut against the two side wall surfaces of the mounting part respectively, and the sealing surface is suitable for abutting against the ball sealing surface of the hemisphere so as to block the fluid channel; the whole valve only has two theoretical leakage points, the situation that the valve has more than two medium leakage points is avoided, and the reliability of the valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to an eccentric C-type ball valve and a method for installing a valve seat. Background Art

[0002] The eccentric C-type ball valve (also known as the "eccentric hemispherical valve") is a valve in which the center axis of the valve shaft is eccentric to the center line of the hemispherical body (C-type ball), and a plugging pair is only provided on one side of the valve body. Its typical structure is: a single valve seat is located downstream of the valve, and the valve relies on the torque transmitted by the valve stem to achieve plugging.

[0003] In the prior art, the ball seat sealing surface of the eccentric C-type ball valve is in a non-contact (disengaged) state during most of the valve switching stroke, so the valve seat must be installed and fixed in a reliable manner. At present, the common eccentric C-type ball valve is mainly hard-sealed, which is achieved by installing the valve seat on a metal mounting part, and then installing the mounting part on the valve body, so that the valve seat is installed on the valve body, and the valve is sealed by the contact between the valve seat and the hemisphere. However, since the valve seat is installed on the valve body through the mounting part, there will be a gap between the valve seat and the mounting part. When the valve seat is installed on the valve body through the mounting part, there will be more leakage points between the valve seat and the hemisphere and the valve body, resulting in low reliability of the valve. Summary of the invention

[0004] In view of this, the present invention provides an eccentric C-type ball valve to solve the problem that when the valve seat is installed on the valve body through a mounting member, there will be a gap between the valve seat and the mounting member, resulting in more leakage points between the valve seat and the hemisphere and the valve body, leading to lower valve reliability.

[0005] In a first aspect, the present invention provides an eccentric C-type ball valve, comprising:

[0006] A valve body, wherein the valve body is integrally provided and has a valve cavity, the valve body also has a fluid passage connected to the valve cavity, and the valve body is provided with a mounting portion, the mounting portion is provided on one side of the valve cavity and is provided around the fluid passage;

[0007] A valve seat, wherein the valve seat is suitable for being arranged in the mounting portion under the action of an external force, and the valve seat has a first abutting surface, a second abutting surface and a sealing surface. When the valve seat is installed in the mounting portion, the first abutting surface and the second abutting surface abut against two side wall surfaces of the mounting portion respectively, and the sealing surface is suitable for abutting against the spherical sealing surface of the hemisphere to block the fluid channel.

[0008] Beneficial effect: By directly installing the valve seat in the mounting portion opened in the valve cavity of the valve body, the medium leakage points between the valve seat and the valve body can be effectively reduced. The medium leakage point is specifically the gap between the first abutting surface of the valve seat and one of the side wall surfaces of the mounting portion, and the medium leakage point of the valve as a whole also includes the gap between the sealing surface of the valve seat and the spherical sealing surface of the hemisphere. Therefore, by directly installing the valve seat in the mounting portion, the entire valve can have only two theoretical leakage points. In this way, it is avoided that when the valve seat is first installed on the mounting part and then the mounting part is installed on the valve body, the valve has more than two medium leakage points due to the gap between the valve seat and the mounting part, which is beneficial to improving the reliability of the valve.

[0009] In an optional embodiment, the mounting portion is a mounting groove, an abutment edge is formed between the mounting portion and the fluid channel, and a side wall surface of the mounting portion is formed on the abutment edge so that the abutment edge abuts against the second abutment surface.

[0010] Beneficial effect: By setting the mounting portion as a mounting groove, since the valve seat is an overall circular ring structure, when the valve seat is installed in the mounting groove, the valve seat can be installed as a whole in the mounting groove. In addition, the mounting groove is specifically arranged on the circumferential side of the fluid channel, so that a contact edge is formed between the mounting groove and the fluid channel. The contact edge is specifically a side wall of the mounting groove close to the fluid channel, and one of the side wall surfaces of the mounting groove is formed on the contact edge. Therefore, when the valve seat is installed in the mounting groove, the contact edge can contact with the second contact surface of the valve seat, thereby stably installing the valve seat in the mounting groove.

[0011] In an optional embodiment, the valve seat further has a third abutting surface formed on one side of the second abutting surface, and the third abutting surface and the second abutting surface are staggered to form a step between the second abutting surface and the third abutting surface;

[0012] Under the action of external force, the abutting edge is adapted to deform so as to be buckled onto the step and abut against the second abutting surface and the third abutting surface at the same time, thereby fixing the valve seat.

[0013] Beneficial effect: by setting the valve seat to also have a third abutting surface, the third abutting surface is specifically formed on one side of the second abutting surface on the valve seat, and at the same time, the third abutting surface and the second abutting surface are staggered, so that a step can be formed between the second abutting surface and the third abutting surface, and when under the action of external force, the abutting edge can be deformed and snapped on the step, and at the same time, the abutting edge can also abut against the third abutting surface, so that the abutting edge can abut against the second abutting surface, the third abutting surface and the step at the same time, so that the abutting edge can fix the valve seat in the mounting portion, thereby avoiding the situation where the valve seat is displaced under the action of the medium pressure, which is beneficial to further improve the reliability of the valve.

[0014] In an optional embodiment, the valve seat further has a limiting surface, and when the valve seat is installed in the mounting portion, the limiting surface is suitable for contacting with the bottom surface of the mounting portion to limit the valve seat.

[0015] Beneficial effect: By setting the valve seat also having a limiting surface, the limiting surface is specifically formed between the first abutting surface and the second abutting surface. When the valve seat is installed in the mounting portion, the limiting surface can abut against the bottom surface of the mounting portion. In this way, the valve seat can be limited by the limiting surface, and it indicates that the valve seat is installed in place.

[0016] In an optional embodiment, the valve body further has a mounting opening connected to the valve cavity, and the valve seat is suitable for extending into the valve cavity through the mounting opening so as to be mounted in the mounting portion.

[0017] Beneficial effect: By arranging the valve body to also have an installation port connected to the valve cavity, the installation port can connect the valve cavity and the outside, so that the valve seat can extend into the valve cavity through the installation port and be installed in the installation part in the valve cavity.

[0018] In a second aspect, the present invention further provides a method for installing a valve seat for the above-mentioned eccentric C-type ball valve, characterized in that it comprises the following steps: providing a first tool to apply an external force for installing the valve seat in the installation portion, and providing a second tool to apply an external force causing the abutment edge to deform;

[0019] Firstly, the valve seat is extended into the valve cavity through the installation opening, and then the valve seat is inserted into the installation portion, so that the first abutting surface and the second abutting surface of the valve seat are respectively abutted against two side wall surfaces of the installation portion;

[0020] Firstly, the first tool is extended into the valve cavity through the fluid channel, and then the first tool is brought into contact with the valve seat, so that an external force is applied to the valve seat through the first tool, and the limiting surface of the valve seat is brought into contact with the bottom surface of the mounting portion;

[0021] First, the first tool is withdrawn from the valve cavity through the fluid channel, and then the second tool is extended into the valve cavity through the fluid channel, and then the second tool is abutted against the abutting edge, so that an external force is applied to the abutting edge through the second tool, and the abutting edge is deformed and buckled on the step on the valve seat and abuts against the second abutting surface and the third abutting surface at the same time;

[0022] The second tool is withdrawn from the valve cavity through the fluid passage.

[0023] Beneficial effect: When the valve seat is installed on the valve body using the above-mentioned valve seat installation method, the medium leakage points between the valve seat and the valve body can be effectively reduced, and the situation that the valve has more than two medium leakage points due to the gap between the valve seat and the mounting part when the valve seat is first installed on the mounting part and then the mounting part is installed on the valve body is avoided, which is beneficial to improving the reliability of the valve.

[0024] In an optional embodiment, the first tooling includes an extension section, a pressure section and a guide section. When external force is applied through the first tooling, the extension section is suitable for driving the guide section to extend into the valve cavity through the fluid channel and re-extend into the fluid channel, and the pressure section is suitable for abutting against the valve seat to apply external force to the valve seat.

[0025] Beneficial effect: by setting the first tooling to include an extension section, a pressure section and a guide section, wherein the pressure section is set between the extension section and the guide section, and the extension section can drive the guide section to extend from the fluid channel into the valve cavity, and make the guide section re-extend into the fluid channel, so that the movement of the guide section in the fluid channel can guide the movement of the entire first tooling, and the pressure section can abut against the valve seat, so that the pressure section can apply external force to the valve seat, and then the limiting surface of the valve seat can abut against the bottom surface of the mounting portion, so that the valve seat can be installed in place in the mounting portion.

[0026] In an optional embodiment, the extended section is an extended cylinder, the pressing section is a pressing cylinder, and the guide section is a guiding cylinder. The cross-sectional dimension of the pressing section is greater than or equal to the total cross-sectional dimension of the mounting portion, the abutting edge and the fluid channel, and the cross-sectional dimension of the guide section is equal to the cross-sectional dimension of the fluid channel.

[0027] Beneficial effect: By setting the extended section as an extended cylinder, the pressure section as a pressure cylinder and the guide section as a guide cylinder, such design is due to the fact that the cross-sectional shape of the flow channel on the valve body is circular, so that the guide section can extend into the valve cavity through the fluid channel and conform to the fluid channel. In addition, the cross-sectional size of the pressure section is greater than or equal to the total cross-sectional size of the mounting portion, the abutting edge and the fluid channel, so that the pressure section can completely cover a portion of the valve seat installed in the mounting portion, and then the pressure section can apply external force to the valve seat, and the cross-sectional size of the guide section is equal to the cross-sectional size of the fluid channel, so that the guide section extending into the fluid channel can guide the movement of the first tooling.

[0028] In an optional embodiment, the second tooling includes an extension section and an extrusion section. When an external force is applied through the second tooling, the extension section is suitable for driving the extrusion section to extend into the valve cavity through the fluid channel, and the extrusion section is suitable for abutting the abutment edge to apply external force to the abutment edge and deform the abutment edge.

[0029] Beneficial effect: By setting the second tooling including an extension section and an extrusion section, wherein the extension section can drive the extrusion section to extend into the valve cavity through the fluid channel, and make part of the extrusion section re-extend into the fluid channel, and make another part of the extrusion section abut against the abutment edge, so that the extrusion section can apply external force to the abutment edge, so that the abutment edge can be deformed and snapped onto the step on the valve seat under the action of external force, and then the abutment edge can fix the valve seat on the mounting portion to avoid displacement of the valve seat.

[0030] In an optional embodiment, the extension section is an extension cylinder, the extrusion section is an extrusion cone, and the cross-sectional size of the extrusion section gradually increases in a direction away from the extension section to close to the extension section;

[0031] The cross-sectional dimension of the end of the extrusion section away from the extension section is smaller than the cross-sectional dimension of the fluid channel, and the cross-sectional dimension of the end of the extrusion section close to the extension section is larger than the cross-sectional dimension of the fluid channel.

[0032] Beneficial effect: By setting the extension section as an extension cylinder and setting the extrusion section as an extrusion cone, the extension section can drive the extrusion section to extend into the valve cavity through the fluid channel. In addition, in the direction from away from the extension section to close to the extension section, the cross-sectional size of the extrusion section gradually increases, and the cross-sectional size of the end of the extrusion section away from the extension section is smaller than the cross-sectional size of the fluid channel, and the cross-sectional size of the end of the extrusion section close to the extension section is larger than the cross-sectional size of the fluid channel, so that the end of the extrusion section away from the extension section can extend into the fluid channel driven by the extension section, and the extrusion section can abut against the abutting edge, and then the extrusion section can apply external force to the abutting edge, so that the abutting edge is deformed and fits on the step of the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a schematic structural diagram of an eccentric C-type ball valve according to an embodiment of the present invention;

[0035] Figure 2 It is a cross-sectional schematic diagram of a valve seat of an eccentric C-type ball valve according to an embodiment of the present invention;

[0036] Figure 3 It is a cross-sectional schematic diagram of a valve body of an eccentric C-type ball valve according to an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of installing a valve seat of an eccentric C-type ball valve according to an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of a valve seat of an eccentric C-type ball valve according to an embodiment of the present invention being installed in place;

[0039] Figure 6 for Figure 5 Detailed diagram of point A in the middle;

[0040] Figure 7 A schematic diagram of deformation of the abutting edge of an eccentric C-type ball valve according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the deformation completion of the abutment edge of an eccentric C-type ball valve according to an embodiment of the present invention;

[0042] Fig. 9 for Figure 8 Detailed diagram of point B in the middle;

[0043] Fig.10 is a side view schematic diagram of a first tooling according to an embodiment of the present invention;

[0044] Fig.11 It is a side view schematic diagram of the second tooling according to an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1-valve body; 11-valve cavity; 12-fluid channel; 13-installation portion; 14-installation opening; 15-abutment edge;

[0047] 2-valve seat; 21-first abutting surface; 22-second abutting surface; 23-sealing surface; 24-third abutting surface; 25-step; 26-limiting surface;

[0048] 3-first tooling; 31-extension section; 32-pressing section; 33-guiding section;

[0049] 4-second tooling; 41-extension section; 42-extrusion section. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0051] Combine the following Figures 1 to 11 , describing an embodiment of the present invention.

[0052] According to an embodiment of the present invention, on the one hand, an eccentric C-type ball valve is provided, such as Figures 1 to 11 As shown, it includes a valve body 1 and a valve seat 2. The valve body 1 is integrated and has a valve cavity 11. The valve body 1 also has a fluid channel 12 connected to the valve cavity 11. A mounting portion 13 is provided on the valve body 1. The mounting portion 13 is provided on one side of the valve cavity 11 and is arranged around the fluid channel 12. The valve seat 2 is suitable for being arranged in the mounting portion 13 under the action of an external force. The valve seat 2 has a first abutting surface 21, a second abutting surface 22 and a sealing surface 23. When the valve seat 2 is installed in the mounting portion 13, the first abutting surface 21 and the second abutting surface 22 respectively abut against two side wall surfaces of the mounting portion 13, and the sealing surface 23 is suitable for abutting against the spherical sealing surface 23 of the hemisphere to block the fluid channel 12.

[0053] The eccentric C-type ball valve of the above structure is provided with a valve seat 2 on a valve body 1, wherein the valve body 1 is provided in an integrated manner, and the valve body 1 has a valve cavity 11 and a fluid passage 12 connected to the valve cavity 11, and at the same time, a mounting portion 13 is provided on the valve body 1, and the mounting portion 13 is a mounting groove in this embodiment, and the mounting portion 13 is specifically provided on one side of the valve cavity 11, and the mounting portion 13 is provided around the fluid passage 12, and the valve seat 2 can be installed in the mounting portion 13 under the action of an external force, and the valve seat 2 has a first abutting surface 21, a second abutting surface 22 and a sealing surface 23, wherein the first abutting surface 21 and the second abutting surface 22 are provided opposite to each other, and the sealing surface 23 is provided on the first abutting surface 21. The valve seat 2 is provided between the first abutting surface 21 and the second abutting surface 22 and toward the valve cavity 11. When the valve seat 2 is installed in the mounting portion 13, the first abutting surface 21 and the second abutting surface 22 of the valve seat 2 can respectively abut against the two side wall surfaces of the mounting portion 13, so that the valve seat 2 can be stably installed in the mounting portion 13, and the sealing surface 23 of the valve seat 2 can abut against the spherical sealing surface 23 of the hemisphere rotatably arranged in the valve cavity 11, so that the fluid channel 12 can be blocked by the spherical sealing surface 23 of the sphere, and when the sealing surface 23 of the valve seat 2 is separated from the spherical sealing surface 23 of the hemisphere, the hemisphere can avoid the fluid channel 12, thereby allowing the fluid channel 12 to normally transport the medium.

[0054] In addition, by directly installing the valve seat 2 in the mounting portion 13 opened in the valve cavity 11 of the valve body 1, the medium leakage points between the valve seat 2 and the valve body 1 can be effectively reduced. The medium leakage point is specifically the gap between the first abutting surface 21 of the valve seat 2 and one of the side wall surfaces of the mounting portion 13, and the medium leakage point of the valve as a whole also includes the gap between the sealing surface 23 of the valve seat 2 and the spherical sealing surface 23 of the hemisphere. Therefore, by directly installing the valve seat 2 in the mounting portion 13, the entire valve can have only two theoretical leakage points. In this way, it is avoided that when the valve seat 2 is first installed on the mounting part and then the mounting part is installed on the valve body 1, there is also a gap between the valve seat 2 and the mounting part, which makes the valve have more than two medium leakage points, which is beneficial to improving the reliability of the valve.

[0055] In one embodiment, Figure 3 As shown, the mounting portion 13 is a mounting groove, and an abutting edge 15 is formed between the mounting portion 13 and the fluid channel 12 . A side wall of the mounting portion 13 is formed on the abutting edge 15 so that the abutting edge 15 abuts against the second abutting surface 22 .

[0056] The eccentric C-type ball valve of the above structure is configured such that the mounting portion 13 is formed as a mounting groove. This is because the valve seat 2 is an overall circular ring structure. Therefore, when the valve seat 2 is installed in the mounting groove, the valve seat 2 can be installed as a whole in the mounting groove. In addition, the mounting groove is specifically arranged around the circumference of the fluid channel 12, so that a contact edge 15 is formed between the mounting groove and the fluid channel 12. The contact edge 15 is specifically a side wall of the mounting groove close to the fluid channel 12, and one of the side wall surfaces of the mounting groove is formed on the contact edge 15. Therefore, when the valve seat 2 is installed in the mounting groove, the contact edge 15 can contact with the second contact surface 22 of the valve seat 2, thereby stably installing the valve seat 2 in the mounting groove.

[0057] In one embodiment, Figure 2 As shown, the valve seat 2 also has a third abutting surface 24 formed on one side of the second abutting surface 22, and the third abutting surface 24 and the second abutting surface 22 are staggered to form a step 25 between the second abutting surface 22 and the third abutting surface 24; under the action of external force, the abutting edge 15 is suitable for deformation to fit on the step 25 and abut with the second abutting surface 22 and the third abutting surface 24 at the same time, and fix the valve seat 2.

[0058] The eccentric C-type ball valve of the above structure also has a third abutting surface 24 by setting the valve seat 2. The third abutting surface 24 is specifically formed on one side of the second abutting surface 22 on the valve seat 2. At the same time, the third abutting surface 24 and the second abutting surface 22 are staggered, so that a step 25 can be formed between the second abutting surface 22 and the third abutting surface 24. When an external force is applied, the abutting edge 15 can be deformed and snapped onto the step 25. At the same time, the abutting edge 15 can also abut against the third abutting surface 24. In this way, the abutting edge 15 can abut against the second abutting surface 22, the third abutting surface 24 and the step 25 at the same time, so that the abutting edge 15 can fix the valve seat 2 in the mounting portion 13, thereby avoiding the displacement of the valve seat 2 under the action of the medium pressure, which is beneficial to further improve the reliability of the valve.

[0059] In one embodiment, Figure 2 and Figure 5 As shown, the valve seat 2 further has a limiting surface 26 . When the valve seat 2 is installed in the mounting portion 13 , the limiting surface 26 is adapted to contact with the bottom surface of the mounting portion 13 to limit the valve seat 2 .

[0060] The eccentric C-type ball valve of the above structure also has a limiting surface 26 by setting the valve seat 2. The limiting surface 26 is specifically formed between the first abutting surface 21 and the second abutting surface 22. When the valve seat 2 is installed in the mounting portion 13, the limiting surface 26 can abut against the bottom surface of the mounting portion 13. In this way, the valve seat 2 can be limited by the limiting surface 26, indicating that the valve seat 2 is installed in place.

[0061] In one embodiment, Figure 1 As shown, the valve body 1 further has a mounting opening 14 communicating with the valve cavity 11 , and the valve seat 2 is adapted to extend into the valve cavity 11 through the mounting opening 14 so as to be mounted in the mounting portion 13 .

[0062] The eccentric C-type ball valve of the above structure is provided with a valve body 1 and also has an installation port 14 connected to the valve cavity 11. The installation port 14 can connect the valve cavity 11 with the outside, so that the valve seat 2 can extend into the valve cavity 11 through the installation port 14 and be installed in the installation part 13 in the valve cavity 11.

[0063] According to an embodiment of the present invention, on the other hand, a method for installing a valve seat 2 is also provided, which is used for the above-mentioned eccentric C-type ball valve. Figures 1 to 11 As shown, the following steps are included: providing a first tool 3 to apply an external force to install the valve seat 2 in the installation portion 13, and a second tool 4 to apply an external force to cause the abutment edge 15 to deform;

[0064] First, extend the valve seat 2 into the valve cavity 11 through the installation opening 14, and then insert the valve seat 2 into the installation portion 13, so that the first abutting surface 21 and the second abutting surface 22 of the valve seat 2 abut against the two side wall surfaces of the installation portion 13 respectively;

[0065] First, the first fixture 3 is extended into the valve cavity 11 through the fluid channel 12, and then the first fixture 3 is brought into contact with the valve seat 2, so that an external force is applied to the valve seat 2 through the first fixture 3, and the limiting surface 26 of the valve seat 2 is brought into contact with the bottom surface of the mounting portion 13;

[0066] First, the first fixture 3 is withdrawn from the valve cavity 11 through the fluid channel 12, and then the second fixture 4 is extended into the valve cavity 11 through the fluid channel 12, and then the second fixture 4 is abutted against the abutting edge 15, so that the second fixture 4 applies an external force to the abutting edge 15, and the abutting edge 15 is deformed and buckled on the step 25 on the valve seat 2 and abuts against the second abutting surface 22 and the third abutting surface 24 at the same time;

[0067] The second tooling 4 is withdrawn from the valve chamber 11 through the fluid passage 12 .

[0068] In the above-mentioned installation method of the valve seat 2, when the valve seat 2 is extended into the valve cavity 11 through the installation opening 14, the valve seat 2 can be first installed in the installation portion 13 on the valve body 1 through the first abutting surface 21 and the second abutting surface 22 on the valve seat 2. In this way, an external force can be applied to the valve seat 2 through the first tooling 3 extending from the fluid passage 12 into the valve cavity 11, so that the limiting surface 26 of the valve seat 2 contacts the bottom surface of the installation portion 13, and then the valve seat 2 is completely installed in the installation portion 13. After the valve seat 2 is installed in place, the first tooling 3 can be withdrawn from the valve cavity 11 through the fluid passage 12. At the same time, the first tooling 3 can be extended from the fluid passage 12 into the valve cavity 11. The second tooling 4 extending through the fluid channel 12 into the valve cavity 11 applies an external force to the abutting edge 15, so that the abutting edge 15 is deformed under the action of the external force and snaps onto the step 25 on the valve seat 2, and the abutting edge 15 can also abut against the second abutting surface 22 and the third abutting surface 24 of the valve seat 2 at the same time. In this way, the valve seat 2 can be fixed by the abutting edge 15 to prevent the valve seat 2 from being displaced under the action of the medium pressure, thereby reducing the reliability of the valve. When the abutting edge 15 is snapped onto the step 25 of the valve seat 2, the second tooling 4 can be withdrawn from the inside and outside of the valve cavity 11 through the fluid channel 12, and the installation of the valve seat 2 is completed.

[0069] In addition, when the valve seat 2 is installed on the valve body 1 using the above-mentioned valve seat 2 installation method, the medium leakage points between the valve seat 2 and the valve body 1 can be effectively reduced, and the situation that the valve has more than two medium leakage points due to the gap between the valve seat 2 and the mounting part when the valve seat 2 is first installed on the mounting part and then the mounting part is installed on the valve body 1 is avoided, which is beneficial to improving the reliability of the valve.

[0070] In one embodiment, Fig.10As shown, the first tooling 3 includes an extension section 31, a pressing section 32 and a guide section 33. When an external force is applied through the first tooling 3, the extension section 31 is suitable for driving the guide section 33 to extend into the valve cavity 11 through the fluid channel 12 and re-extend into the fluid channel 12, and the pressing section 32 is suitable for abutting against the valve seat 2 to apply external force to the valve seat 2.

[0071] The above-mentioned installation method of the valve seat 2 is provided with a first tooling 3 including an extension section 31, a pressing section 32 and a guide section 33, wherein the pressing section 32 is provided between the extension section 31 and the guide section 33, and the extension section 31 can drive the guide section 33 to extend from the fluid channel 12 into the valve cavity 11, and make the guide section 33 re-extend into the fluid channel 12, so that the movement of the guide section 33 in the fluid channel 12 can guide the movement of the entire first tooling 3, and the pressing section 32 can abut against the valve seat 2, so that the pressing section 32 can apply external force to the valve seat 2, and then the limiting surface 26 of the valve seat 2 can abut against the bottom surface of the mounting portion 13, so that the valve seat 2 can be installed in place in the mounting portion 13.

[0072] In one embodiment, Figure 4 As shown, the extended section 31 is an extended cylinder, the pressing section 32 is a pressing cylinder, and the guide section 33 is a guiding cylinder. The cross-sectional size of the pressing section 32 is greater than or equal to the total cross-sectional size of the mounting portion 13, the abutting edge 15 and the fluid channel 12, and the cross-sectional size of the guide section 33 is equal to the cross-sectional size of the fluid channel 12.

[0073] The above-mentioned installation method of the valve seat 2 is to set the extension section 31 as an extension cylinder, the pressure section 32 as a pressure cylinder and the guide section 33 as a guide cylinder. The design is such that the cross-sectional shape of the flow channel on the valve body 1 is circular, so that the guide section 33 can extend into the valve cavity 11 through the fluid channel 12 and conform to the fluid channel 12. In addition, the cross-sectional size of the pressure section 32 is greater than or equal to the total cross-sectional size of the mounting portion 13, the abutting edge 15 and the fluid channel 12, so that the pressure section 32 can completely cover the valve seat 2 partially installed in the mounting portion 13, and then the pressure section 32 can apply external force to the valve seat 2. The cross-sectional size of the guide section 33 is equal to the cross-sectional size of the fluid channel 12. In this way, the guide section 33 extending into the fluid channel 12 can guide the movement of the first tooling 3.

[0074] In one embodiment, Fig.11 As shown, the second tooling 4 includes an extension section 41 and an extrusion section 42. When an external force is applied through the second tooling 4, the extension section 41 is suitable for driving the extrusion section 42 to extend into the valve cavity 11 through the fluid channel 12, and the extrusion section 42 is suitable for abutting against the abutting edge 15 to apply external force to the abutting edge 15 and deform the abutting edge 15.

[0075] The above-mentioned installation method of the valve seat 2 is provided with a second tooling 4 including an extension section 41 and an extrusion section 42, wherein the extension section 41 can drive the extrusion section 42 to extend into the valve cavity 11 through the fluid channel 12, and make a part of the extrusion section 42 re-extend into the fluid channel 12, and make another part of the extrusion section 42 abut against the abutment edge 15, so that the extrusion section 42 can apply external force to the abutment edge 15, so that the abutment edge 15 can be deformed and snapped onto the step 25 on the valve seat 2 under the action of external force, and then the abutment edge 15 can fix the valve seat 2 on the mounting portion 13 to prevent the valve seat 2 from displacement.

[0076] In one embodiment, Figure 7 As shown, the extension section 41 is an extended cylinder, and the extrusion section 42 is an extrusion cone. The cross-sectional size of the extrusion section 42 gradually increases in the direction away from the extension section 41 to the direction close to the extension section 41; the cross-sectional size of the end of the extrusion section 42 away from the extension section 41 is smaller than the cross-sectional size of the fluid channel 12, and the cross-sectional size of the end of the extrusion section 42 close to the extension section 41 is larger than the cross-sectional size of the fluid channel 12.

[0077] The above-mentioned installation method of the valve seat 2 is to set the extension section 41 as an extended cylinder and the extrusion section 42 as an extrusion cone, so that the extension section 41 can drive the extrusion section 42 to extend into the valve cavity 11 through the fluid channel 12. In addition, in the direction away from the extension section 41 to the direction close to the extension section 41, the cross-sectional size of the extrusion section 42 gradually increases, and the cross-sectional size of the end of the extrusion section 42 away from the extension section 41 is smaller than the cross-sectional size of the fluid channel 12, and the cross-sectional size of the end of the extrusion section 42 close to the extension section 41 is larger than the cross-sectional size of the fluid channel 12, so that the end of the extrusion section 42 away from the extension section 41 can extend into the fluid channel 12 driven by the extension section 41, and the extrusion section 42 can abut against the abutting edge 15, so that the extrusion section 42 can apply external force to the abutting edge 15, so that the abutting edge 15 is deformed and engaged with the step 25 of the valve seat 2.

[0078] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An eccentric C-type ball valve, characterized in that: include: A valve body (1), the valve body (1) is integrally provided and has a valve cavity (11), the valve body (1) also has a fluid passage (12) connected to the valve cavity (11), the valve body (1) is provided with a mounting portion (13), the mounting portion (13) is provided on one side of the valve cavity (11) and is arranged around the fluid passage (12); A valve seat (2), wherein the valve seat (2) is suitable for being arranged in the mounting portion (13) under the action of an external force, and the valve seat (2) has a first abutting surface (21), a second abutting surface (22) and a sealing surface (23). When the valve seat (2) is installed in the mounting portion (13), the first abutting surface (21) and the second abutting surface (22) respectively abut against two side wall surfaces of the mounting portion (13), and the sealing surface (23) is suitable for abutting against a spherical sealing surface (23) of a hemisphere to seal the fluid channel (12).

2. The eccentric C-type ball valve according to claim 1, characterized in that: The mounting portion (13) is a mounting groove, an abutment edge (15) is formed between the mounting portion (13) and the fluid channel (12), and a side wall surface of the mounting portion (13) is formed on the abutment edge (15) so that the abutment edge (15) abuts against the second abutment surface (22).

3. The eccentric C-type ball valve according to claim 2, characterized in that: The valve seat (2) further comprises a third abutting surface (24) formed on one side of the second abutting surface (22), and the third abutting surface (24) and the second abutting surface (22) are arranged in a staggered manner to form a step (25) between the second abutting surface (22) and the third abutting surface (24); Under the action of external force, the abutment edge (15) is adapted to deform so as to be engaged with the step (25) and simultaneously abut against the second abutment surface (22) and the third abutment surface (24) to fix the valve seat (2).

4. The eccentric C-type ball valve according to claim 3, characterized in that: The valve seat (2) also has a limiting surface (26). When the valve seat (2) is installed in the installation portion (13), the limiting surface (26) is suitable for contacting the bottom surface of the installation portion (13) to limit the valve seat (2).

5. The eccentric C-type ball valve according to any one of claims 1 to 4, characterized in that: The valve body (1) also has a mounting opening (14) which is arranged in communication with the valve cavity (11), and the valve seat (2) is suitable for extending into the valve cavity (11) through the mounting opening (14) so ​​as to be mounted in the mounting portion (13).

6. A valve seat installation method for the eccentric C-type ball valve according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: providing a first tool (3) to apply an external force to install the valve seat (2) in the installation portion (13), and providing a second tool (4) to apply an external force to cause the abutment edge (15) to deform; First, the valve seat (2) is extended into the valve cavity (11) through the installation opening (14), and then the valve seat (2) is inserted into the installation portion (13), so that the first abutting surface (21) and the second abutting surface (22) of the valve seat (2) are respectively abutted against two side wall surfaces of the installation portion (13); First, the first tooling (3) is extended into the valve cavity (11) through the fluid channel (12), and then the first tooling (3) is brought into contact with the valve seat (2), so that an external force is applied to the valve seat (2) through the first tooling (3), and the limiting surface (26) of the valve seat (2) is brought into contact with the bottom surface of the mounting portion (13); First, the first tooling (3) is withdrawn from the valve cavity (11) through the fluid passage (12), and then the second tooling (4) is extended into the valve cavity (11) through the fluid passage (12), and then the second tooling (4) is abutted against the abutting edge (15), so that an external force is applied to the abutting edge (15) through the second tooling (4), and the abutting edge (15) is deformed and engaged with the step (25) on the valve seat (2) and abutted against the second abutting surface (22) and the third abutting surface (24) at the same time; The second tool (4) is withdrawn from the valve chamber (11) through the fluid channel (12).

7. The method for installing a valve seat according to claim 6, characterized in that: The first tooling (3) comprises an extension section (31), a pressing section (32) and a guide section (33). When an external force is applied through the first tooling (3), the extension section (31) is suitable for driving the guide section (33) to extend into the valve cavity (11) through the fluid channel (12) and then re-extend into the fluid channel (12). The pressing section (32) is suitable for abutting against the valve seat (2) to apply an external force to the valve seat (2).

8. The method for installing a valve seat according to claim 7, characterized in that: The extended section (31) is an extended cylinder, the pressing section (32) is a pressing cylinder, and the guide section (33) is a guiding cylinder. The cross-sectional dimension of the pressing section (32) is greater than or equal to the total cross-sectional dimension of the mounting portion (13), the abutting edge (15) and the fluid channel (12), and the cross-sectional dimension of the guide section (33) is equal to the cross-sectional dimension of the fluid channel (12).

9. The method for installing a valve seat according to claim 8, characterized in that: The second tooling (4) comprises an extension section (41) and an extrusion section (42). When an external force is applied through the second tooling (4), the extension section (41) is suitable for driving the extrusion section (42) to extend into the valve cavity (11) through the fluid channel (12), and the extrusion section (42) is suitable for abutting against the abutting edge (15) to apply an external force to the abutting edge (15) and deform the abutting edge (15).

10. The method for installing a valve seat according to claim 9, characterized in that: The extension section (41) is an extension cylinder, the extrusion section (42) is an extrusion cone, and the cross-sectional size of the extrusion section (42) gradually increases in a direction away from the extension section (41) and toward the extension section (41); The cross-sectional dimension of the end of the extrusion section (42) away from the extension section (41) is smaller than the cross-sectional dimension of the fluid channel (12), and the cross-sectional dimension of the end of the extrusion section (42) close to the extension section (41) is larger than the cross-sectional dimension of the fluid channel (12).

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