All-welded forged steel ball valve

Abstract

The utility model relates to an all-welded forged steel ball valve which comprises a valve body, the valve body comprises a middle valve body, an upstream valve body and a downstream valve body, the middle valve body is equal in inner diameter, and the upstream valve body and the downstream valve body are located at the two ends of the middle valve body and connected with the middle valve body in a welded mode. The valve element is of a spherical structure and is rotationally connected to the interior of the valve cavity of the valve body, a middle flow channel communicating the upstream valve body with the downstream valve body is arranged in the valve element, and a pressure reducing hole communicating the valve cavity with the middle flow channel is formed in the valve element; the valve seat is provided with two groups, the two groups of valve seats are respectively fixed in the upstream valve body and the downstream valve body and are connected with the valve core in a sliding mode, and the valve seats are provided with movable sealing rings which are connected with the outer surface of the valve core in a sealing mode. Part of fluid media flowing through the middle flow channel can enter the valve cavity through the pressure reducing holes, so that the pressure of the fluid media in the middle flow channel tends to be the same as the pressure of the fluid media in the valve cavity. The internal and external pressure of the movable sealing ring tends to be balanced, the sealing ring is prevented from being damaged and losing efficacy under the action of medium pressure, and the sealing reliability of the ball valve is improved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a fully welded forged steel ball valve. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. They are control components in fluid conveying systems and have functions such as shutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion, or overflow pressure relief. Heating pipelines are an indispensable infrastructure in existing urban construction, and valves are indispensable in heating pipelines.

[0003] Ball valves are valves whose spherical opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve. They can also be used for regulating and controlling fluids and are widely used in industries such as petroleum and natural gas, chemicals, and hydraulics. Especially when used in oil and natural gas, the environmental conditions are harsh, and the media contains many particulate impurities in addition to being corrosive.

[0004] After long-term use, solid particles will settle in the valve body of a traditional ball valve, thus blocking the valve seat. On the other hand, these solid particles will move with the fluid medium for a long time, constantly wearing the valve seat seal ring, causing erosion and corrosion to the seal ring and the valve body, resulting in reduced sealing performance of the valve during use. Therefore, a fully welded forged steel ball valve with high sealing performance is proposed. Summary of the invention

[0005] The embodiment of the present application provides a fully welded forged steel ball valve to solve the problem in the related art that the sealing performance of the valve body is poor and the sealing ring is easily damaged and fails under the action of the medium pressure.

[0006] The embodiment of the present application provides a fully welded forged steel ball valve, comprising:

[0007] A valve body, the valve body comprising an intermediate valve body of equal inner diameter, an upstream valve body and a downstream valve body located at both ends of the intermediate valve body and both welded to the intermediate valve body;

[0008] A valve core, the valve core is a spherical structure and is rotatably connected to the valve cavity of the valve body, the valve core is provided with an intermediate flow channel connecting the upstream valve body and the downstream valve body, and a pressure reducing hole connecting the valve cavity and the intermediate flow channel;

[0009] The valve seat is provided with two groups, the two groups of valve seats are respectively fixed in the upstream valve body and the downstream valve body and are slidably connected with the valve core, and the valve seat is provided with a dynamic sealing ring which is sealed and connected with the outer surface of the valve core.

[0010] In some embodiments: the upstream valve body and the downstream valve body both include an arc-shaped expansion tube body connected to the intermediate valve body, and an equal-diameter interface tube body away from the intermediate valve body, and the diameter of the arc-shaped expansion tube body gradually increases toward the direction approaching the intermediate valve body.

[0011] In some embodiments: the diameter of the valve core is smaller than the inner diameter of the arc-shaped enlarged tube body, the valve core, the valve seat and the valve body together form a closed valve chamber, and the pressure reducing hole connects the valve chamber with the intermediate flow channel.

[0012] In some embodiments: the top surface of the valve core is flattened into a top plane, the bottom surface of the valve core is flattened into a bottom plane, and the top plane and the bottom plane are parallel to each other;

[0013] An upper rotating shaft vertically connected to the top plane is provided on the top plane, and a lower rotating shaft vertically connected to the bottom plane is provided on the bottom plane, and the upper rotating shaft and the lower rotating shaft are coaxially arranged;

[0014] An upper seat plate sleeved on the upper rotating shaft and a lower seat plate sleeved on the lower rotating shaft are fixedly connected between the upstream valve body and the downstream valve body.

[0015] In some embodiments: a first oil-free bearing is connected between the upper rotating shaft and the upper seat plate, and a second oil-free bearing is connected between the upper seat plate and the top plane;

[0016] A third oil-free bearing is connected between the lower rotating shaft and the lower seat plate, and a fourth oil-free bearing is connected between the lower seat plate and the bottom plane.

[0017] In some embodiments: a valve stem extending out of the valve body is fixedly connected to the top of the upper rotating shaft, a flange rotatably sealed with the valve stem is provided on the valve body, and a driving mechanism for driving the valve stem to drive the valve core to rotate is connected to the flange.

[0018] In some embodiments: an upper bend pipe communicating with the valve chamber is provided at the top of the valve body, a lower bend pipe communicating with the valve chamber is provided at the bottom of the valve body, a first valve is connected to the upper bend pipe, a second valve is connected to the lower bend pipe, and a quick-connect connector is connected to the inlet end of the first valve.

[0019] In some embodiments: a scraper slidably connected to the valve core is fixedly connected to one side of the valve seat close to the valve core, and two scrapers are provided, and the two scrapers are located on both sides of the dynamic sealing ring.

[0020] In some embodiments: an annular channel is provided between the valve seat and the valve body, the annular channel is located at an end away from the valve core, an oil filling hole connected to the annular channel is opened on the valve body, and a one-way valve is connected to the oil filling hole.

[0021] In some embodiments, the bottom of the valve body is welded to two bases which are parallel to each other and spaced apart.

[0022] The beneficial effects of the technical solution provided by this application include:

[0023] An embodiment of the present application provides a fully welded forged steel ball valve. Since the fully welded forged steel ball valve of the present application is provided with a valve body, the valve body includes an intermediate valve body with an equal inner diameter, an upstream valve body and a downstream valve body located at both ends of the intermediate valve body and welded to the intermediate valve body; a valve core, which is a spherical structure and is rotatably connected to the valve cavity of the valve body, and the valve core is provided with an intermediate flow channel connecting the upstream valve body and the downstream valve body, and a pressure reducing hole connecting the valve cavity and the intermediate flow channel; a valve seat, which is provided with two groups of valve seats, the two groups of valve seats are respectively fixed in the upstream valve body and the downstream valve body and are slidably connected to the valve core, and the valve seat is provided with a dynamic sealing ring that is sealingly connected to the outer surface of the valve core.

[0024] Therefore, the fully welded forged steel ball valve of the present application is provided with an intermediate flow channel connecting the upstream valve body and the downstream valve body, and a pressure reducing hole connecting the intermediate flow channel and the valve cavity on the valve core, and the pressure reducing hole can allow part of the fluid medium flowing through the intermediate flow channel to enter the valve cavity, so that the pressure of the fluid medium in the intermediate flow channel and the pressure of the fluid medium in the valve cavity tend to be the same. In addition, the fluid medium outside the valve cavity is reduced from squeezing the dynamic seal ring under the action of pressure, so that the internal and external pressures of the dynamic seal ring tend to be balanced, preventing the seal ring from being damaged and failing under the action of the medium pressure, and improving the sealing reliability of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a structural front view of an embodiment of the present application;

[0027] Figure 2 It is a left view of the structure of the embodiment of the present application;

[0028] Figure 3 for Figure 1 A partial enlarged view of point A in the middle.

[0029] Reference numerals:

[0030] 10. Valve body; 11. Intermediate valve body; 12. Upstream valve body; 13. Downstream valve body; 14. Flange; 15. Check valve; 16. Upper elbow; 17. Lower elbow; 18. First valve; 19. Second valve;

[0031] 20. Valve core; 21. Intermediate flow channel; 22. Pressure reducing hole; 23. Top plane; 24. Bottom plane; 25. Upper seat plate; 26. Lower seat plate; 27. Valve stem; 28. Valve chamber;

[0032] 30. Valve seat; 31. Dynamic sealing ring; 32. Static sealing ring; 33. Scraper; 34. Annular channel; 40. Driving mechanism. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] The embodiment of the present application provides a fully welded forged steel ball valve, which can solve the problem in the related art that the sealing performance of the valve body is poor and the sealing ring is easily damaged and fails under the action of the medium pressure.

[0035] See also Figures 1 to 3 As shown, the embodiment of the present application provides a fully welded forged steel ball valve, comprising:

[0036] The valve body 10 includes an intermediate valve body 11 of equal inner diameter, an upstream valve body 12 and a downstream valve body 13 located at both ends of the intermediate valve body 11 and welded to the intermediate valve body 11; the intermediate valve body 11 is a circular tube structure of equal diameter, and the upstream valve body 12 and the downstream valve body 13 are both circular tube structures of variable diameter. The bottom of the valve body 10 is welded with two mutually parallel and spaced bases to fix the valve body 10 at a set position.

[0037] The valve core 20 is a spherical structure and is rotatably connected to the valve cavity of the valve body 10. The valve core 20 is provided with an intermediate flow channel 21 connecting the upstream valve body 12 and the downstream valve body 13, and a pressure reducing hole 22 connecting the valve cavity and the intermediate flow channel 21 is opened. The pressure reducing hole 22 can pass the fluid medium flowing through the intermediate flow channel 21 into the valve cavity, so that the pressure inside and outside the valve cavity tends to be balanced.

[0038] The valve seat 30 is provided with two groups. The two groups of valve seats 30 are respectively fixed in the upstream valve body 12 and the downstream valve body 13 and are both slidably connected to the valve core 20. A dynamic sealing ring 31 is provided on the valve seat 30 and is sealed to the outer surface of the valve core 20. The dynamic sealing ring 31 is preferably but not limited to a fluororubber sealing ring.

[0039] The fully welded forged steel ball valve of the present application is provided with an intermediate flow channel 21 connecting the upstream valve body 12 and the downstream valve body 13 on the valve core 20, and a pressure reducing hole 22 connecting the intermediate flow channel 21 and the valve cavity. The pressure reducing hole 22 can allow part of the fluid medium flowing through the intermediate flow channel 21 to enter the valve cavity, so that the pressure of the fluid medium in the intermediate flow channel 21 tends to be the same as the pressure of the fluid medium in the valve cavity.

[0040] When the ball valve is opened, the fluid medium entering the ball valve squeezes the dynamic sealing ring 31 under the action of pressure inside and outside the valve cavity, so that the forces on both sides of the dynamic sealing ring 31 are more balanced, and the internal and external pressures of the dynamic sealing ring 31 tend to be balanced, thereby preventing the sealing ring from being damaged and failing under the action of the medium pressure, and improving the sealing reliability of the ball valve.

[0041] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a fully welded forged steel ball valve, the upstream valve body 12 and the downstream valve body 13 of the fully welded forged steel ball valve both include an arc-shaped expansion tube body connected to the intermediate valve body 11, and an equal-diameter interface tube body away from the intermediate valve body 11, and the diameter of the arc-shaped expansion tube body gradually increases toward the direction approaching the intermediate valve body 11.

[0042] The diameter of the valve core 20 is smaller than the inner diameter of the arc-shaped enlarged tube body, and the valve core 20, the valve seat 30 and the valve body 10 together form a closed valve chamber 28, which is separated from the intermediate flow channel 21 by the valve seat 30, and the pressure reducing hole 22 connects the valve chamber 28 and the intermediate flow channel 21. The fluid medium pressure entering the valve chamber 28 from the intermediate flow channel 21 is the same, so that the dynamic seal ring 31 is squeezed by the one-way fluid and deformed and fails.

[0043] In some alternative embodiments: See Figure 1 As shown, the embodiment of the present application provides a fully welded forged steel ball valve, the top surface of the valve core 20 of the fully welded forged steel ball valve is flattened to form a top plane 23, and the bottom surface of the valve core 20 is flattened to form a bottom plane 24, and the top plane 23 and the bottom plane 24 are parallel to each other. An upper rotating shaft vertically connected to the top plane 23 is provided on the top plane 23, and a lower rotating shaft vertically connected to the bottom plane 24 is provided on the bottom plane 24, and the upper rotating shaft and the lower rotating shaft are coaxially arranged.

[0044] An upper seat plate 25 sleeved on the upper rotating shaft and a lower seat plate 26 sleeved on the lower rotating shaft are fixedly connected between the upstream valve body 12 and the downstream valve body 13. A first oil-free bearing is connected between the upper rotating shaft and the upper seat plate 25, and a second oil-free bearing is connected between the upper seat plate 25 and the top plane to reduce mutual friction. A third oil-free bearing is connected between the lower rotating shaft and the lower seat plate, and a fourth oil-free bearing is connected between the lower seat plate and the bottom plane to reduce mutual friction.

[0045] In some alternative embodiments: See Figure 1As shown, the embodiment of the present application provides a fully welded forged steel ball valve, the top of the upper rotating shaft of the fully welded forged steel ball valve is fixedly connected with a valve stem 27 extending out of the valve body 10, the valve body 10 is provided with a flange 14 which is rotatably sealed and connected to the valve stem 27, and a driving mechanism 40 for driving the valve stem 27 to drive the valve core 20 to rotate is connected to the flange 14. The driving mechanism 40 includes a worm gear mechanism, and a handwheel or a motor for driving the worm gear mechanism to rotate forward and reversely.

[0046] In some alternative embodiments: See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a fully welded forged steel ball valve, wherein the top of the valve body 10 of the fully welded forged steel ball valve is provided with an upper bend pipe 16 connected to the valve chamber 28, the bottom of the valve body 10 is provided with a lower bend pipe 17 connected to the valve chamber 28, the upper bend pipe 16 is connected to a first valve 18, the lower bend pipe 17 is connected to a second valve 19, and the inlet end of the first valve 18 is connected to a quick-connect connector.

[0047] In the embodiment of the present application, an upper curved pipe 16 communicating with the valve chamber 28 is provided at the top of the valve body 10, and a lower curved pipe 17 communicating with the valve chamber 28 is provided at the bottom of the valve body 10. The upper curved pipe 16 is used to connect a cleaning medium to flush the residual medium in the valve chamber 28, and the impurities after flushing are discharged from the lower curved pipe 17. After flushing is completed, the first valve 18 and the second valve 19 are closed to wait for the ball valve to be opened for use.

[0048] In some alternative embodiments: See Figure 3 As shown, an embodiment of the present application provides a fully welded forged steel ball valve, on which a scraper 33 slidably connected to the valve core 20 is fixedly connected to a valve seat 30 of the fully welded forged steel ball valve. Two scrapers 33 are provided, and the two scrapers 33 are located on both sides of the dynamic sealing ring 31 to scrape off impurities attached to the outer surface of the valve core 20 and reduce the wear and damage of solid impurities on the dynamic sealing ring 31.

[0049] In some alternative embodiments: See Figure 3 As shown, the embodiment of the present application provides a fully welded forged steel ball valve, in which an annular channel 34 is provided between the valve seat 30 and the valve body 10 of the fully welded forged steel ball valve, and the annular channel 34 is located at the end away from the valve core 20. An oil filling hole connected to the annular channel 34 is provided on the valve body 10, and a check valve 15 is connected to the oil filling hole. When the valve seat 30 or the valve core 20 rubs against each other and wears, oil is filled and pressurized into the annular channel 34 through the oil filling device connected to the check valve 15, so as to push the valve seat 30 toward the valve core 20 to make precise contact with each other, thereby improving the sealing performance between the valve core 20 and the valve seat 30.

[0050] How it works

[0051] The embodiment of the present application provides a fully welded forged steel ball valve. Since the fully welded forged steel ball valve of the present application is provided with a valve body 10, the valve body 10 includes an intermediate valve body 11 of equal inner diameter, an upstream valve body 12 and a downstream valve body 13 located at both ends of the intermediate valve body 11 and welded to the intermediate valve body 11; a valve core 20, the valve core 20 is a spherical structure and is rotatably connected to the valve cavity of the valve body 10, the valve core 20 is provided with an intermediate flow channel 21 connecting the upstream valve body 12 and the downstream valve body 13, and a pressure reducing hole 22 connecting the valve cavity and the intermediate flow channel 21; a valve seat 30, the valve seat 30 is provided with two groups, the two groups of valve seats are respectively fixed in the upstream valve body 12 and the downstream valve body 13 and are slidably connected to the valve core 20, and the valve seat 30 is provided with a dynamic sealing ring 31 that is sealed and connected to the outer surface of the valve core 20.

[0052] Therefore, the fully welded forged steel ball valve of the present application is provided with an intermediate flow channel 21 connecting the upstream valve body 12 and the downstream valve body 13, and a pressure relief hole 22 connecting the intermediate flow channel 21 and the valve cavity on the valve core 20. The pressure relief hole 22 can allow part of the fluid medium flowing through the intermediate flow channel 21 to enter the valve cavity, so that the pressure of the fluid medium in the intermediate flow channel 21 is similar to that in the valve cavity. This reduces the pressure of the fluid medium outside the valve cavity squeezing the dynamic seal ring 31, balances the internal and external pressures of the dynamic seal ring 31, prevents the seal ring from being damaged and ineffective under the action of the medium pressure, and improves the sealing reliability of the ball valve.

[0053] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0054] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0055] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A fully welded forged steel ball valve, characterized in that: include: A valve body (10), the valve body (10) comprising a middle valve body (11), an upstream valve body (12) and a downstream valve body (13) located at two ends of the middle valve body (11) and both connected to the middle valve body (11) by welding; A valve core (20), the valve core (20) being a spherical structure and being rotatably connected to the valve cavity of the valve body (10), the valve core (20) being provided with an intermediate flow passage (21) communicating with the upstream valve body (12) and the downstream valve body (13), and a pressure reducing hole (22) communicating with the valve cavity and the intermediate flow passage (21); A valve seat (30), wherein the valve seat (30) is provided in two groups, the two groups of valve seats (30) are respectively fixed in the upstream valve body (12) and the downstream valve body (13) and are slidably connected to the valve core (20), and the valve seat (30) is provided with a dynamic sealing ring (31) which is sealingly connected to the outer surface of the valve core (20).

2. A fully welded forged steel ball valve as claimed in claim 1, characterized in that: The upstream valve body (12) and the downstream valve body (13) both comprise an arc-shaped expansion tube body connected to the intermediate valve body (11), and an interface tube body away from the intermediate valve body (11), and the diameter of the arc-shaped expansion tube body gradually increases towards the direction approaching the intermediate valve body (11).

3. A fully welded forged steel ball valve as claimed in claim 2, characterized in that: The diameter of the valve core (20) is smaller than the inner diameter of the arc-shaped enlarged tube body; the valve core (20), the valve seat (30) and the valve body (10) together form a closed valve chamber (28); the pressure reducing hole (22) connects the valve chamber (28) with the intermediate flow channel (21).

4. A fully welded forged steel ball valve as claimed in claim 2 or 3, characterized in that: The top surface of the valve core (20) is flattened to form a top plane (23), and the bottom surface of the valve core (20) is flattened to form a bottom plane (24), and the top plane (23) and the bottom plane (24) are parallel to each other; An upper rotating shaft vertically connected to the top plane (23) is provided on the top plane (23), and a lower rotating shaft vertically connected to the bottom plane (24) is provided on the bottom plane (24), and the upper rotating shaft and the lower rotating shaft are coaxially arranged; An upper seat plate (25) sleeved on the upper rotating shaft and a lower seat plate (26) sleeved on the lower rotating shaft are fixedly connected between the upstream valve body (12) and the downstream valve body (13).

5. A fully welded forged steel ball valve as claimed in claim 4, characterized in that: A first oil-free bearing is connected between the upper rotating shaft and the upper seat plate (25), and a second oil-free bearing is connected between the upper seat plate (25) and the top plane (23); A third oil-free bearing is connected between the lower rotating shaft and the lower seat plate (26), and a fourth oil-free bearing is connected between the lower seat plate (26) and the bottom plane (24).

6. A fully welded forged steel ball valve as claimed in claim 4, characterized in that: A valve stem (27) extending out of the valve body (10) is fixedly connected to the top of the upper rotating shaft, and a flange (14) rotatably sealed with the valve stem (27) is provided on the valve body (10). A driving mechanism (40) for driving the valve stem (27) to rotate the valve core (20) is connected to the flange (14).

7. A fully welded forged steel ball valve as claimed in claim 3, characterized in that: An upper curved pipe (16) communicating with the valve chamber (28) is provided at the top of the valve body (10), and a lower curved pipe (17) communicating with the valve chamber (28) is provided at the bottom of the valve body (10); a first valve (18) is connected to the upper curved pipe (16), and a second valve (19) is connected to the lower curved pipe (17); and a quick-connect connector is connected to the inlet end of the first valve (18).

8. A fully welded forged steel ball valve as claimed in claim 1, characterized in that: A scraper (33) slidably connected to the valve core (20) is fixedly connected to one side of the valve seat (30) close to the valve core (20), and two scrapers (33) are provided. The two scrapers (33) are respectively located on both sides of the dynamic sealing ring (31).

9. A fully welded forged steel ball valve as claimed in claim 1, characterized in that: An annular channel (34) is provided between the valve seat (30) and the valve body (10), the annular channel (34) being located at an end away from the valve core (20), and an oil injection hole communicating with the annular channel (34) is provided on the valve body (10), and a one-way valve (15) is connected to the oil injection hole.

10. A fully welded forged steel ball valve as claimed in claim 1, characterized in that: The bottom of the valve body (10) is welded with two bases which are parallel to each other and spaced apart.

Images