Double-control linkage valve

Abstract

The double-control linkage valve comprises a valve body, a valve seat, a C-shaped ball core, a valve rod, a driving device, a sealing seat, a valve core and a pin shaft, a circle of gear is arranged on the surface of the position, located in a ball core channel, of the valve rod, the sealing seat is arranged at a fluid outlet of a fluid channel and connected with the valve body in a sealed mode, a sliding way is arranged on the sealing seat, and the sliding way is connected with the valve core. A liquid outlet hole is formed in the side wall of the sliding way, the valve element is connected into the sliding way in a sliding mode, the pin shaft is perpendicular to the valve rod, one end of the pin shaft is connected with the valve element, and the other end of the pin shaft is provided with a rack and connected to the valve rod in a meshed mode through the rack and the gear so that rotating motion of the valve rod can be converted into translational motion of the pin shaft to drive the valve element to slide along the sliding way. According to the C-shaped ball valve, the structure of the axial regulating valve is combined on the basis of an existing C-shaped ball valve, double-control linkage control of the ball valve and the axial regulating valve is achieved, and meanwhile stability and reliability of the valve rod of the C-shaped ball valve are enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a double-control linkage valve. Background Art

[0002] As Figure 4 shown, the C-type ball valve is a ball valve with a special design, having unique shape and structural characteristics. The ball of the C-type ball valve is hemispherical, and this design enables the ball valve to have a smaller opening and closing force when opening and closing, and is particularly suitable for large-diameter pipelines and high-pressure environments. The C-ball of the C-type ball valve and the valve seat adopt a soft-sealing method, and the C-ball adopts a structural design with upper and lower support shafts for positioning. The support shafts are in static fit with the valve body, and the C-ball will not tilt. The thrust of the medium on the C-ball is borne by the upper and lower valve stems, and the valve stems only transmit the opening and closing torque of the ball valve. This design ensures the stability and reliability of the valve. When the valve is opened, the C-ball tilts away from the valve seat, and the fluid flushes some materials and sundries along the sealing surface by 360 degrees. When the valve is closed, the C-ball moves gradually relative to the valve seat, and can realize the shearing of the adhered materials and sundries on the sealing pair, ensuring the cleanliness of the sealing pair. The C-type ball valve is widely used in various industrial fields with its unique shape and precise structural design, especially in occasions where precise control of the medium flow rate and pressure is required.

[0003] Although the existing C-type ball valves perform excellently in many aspects, due to their specific shape and structural configuration, they have the following defects at the same time: 1. The C-type ball valve can only form a seal on one side of the pressure source, and the soft-sealing form will cause wear of the sealing surface and a decline in the sealing performance; 2. The C-type ball valve adopts a structural design with upper and lower valve stems for positioning. Although it improves the stability and reliability of the valve, the valve stems will bear a relatively high axial force for a long time, and the parts where the valve stems contact the ball may be worn due to long-term friction, especially in the case of high-frequency operation or when the medium contains solid particles, which may lead to a decline in the sealing performance or inflexible operation of the valve; 3. Although the C-type ball valve has a certain self-cleaning function during the opening and closing processes, in some cases, such as when the medium contains a large amount of viscous or highly viscous impurities, this self-cleaning function may not be able to completely remove the impurities on the sealing surface, thus affecting the sealing performance; 4. At the same time, due to the relatively complex internal structure of the C-type ball valve, once a failure occurs or maintenance is required, it may require a relatively long shutdown time and high maintenance costs. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a double-control linkage valve.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] A double-control linkage valve, comprising:

[0007] Valve body, a fluid passage penetrating the valve body is provided on the valve body, and both ends of the fluid passage are a fluid inlet and a fluid outlet respectively;

[0008] Valve seat, the valve seat is arranged on one side of the fluid inlet in the fluid passage;

[0009] C-shaped ball core, the C-shaped ball core includes a ball core sealing surface capable of being matched and sealed with the valve seat and a ball core passage penetrating the C-shaped ball core, and the C-shaped ball core is rotatably connected in the fluid passage;

[0010] Valve rod, the valve rod is perpendicular to the fluid passage and is rotatably arranged on the valve body. The lower end of the valve rod penetrates through the C-shaped ball core and the ball core passage and is connected to the bottom of the valve body, and its upper end penetrates through the top of the valve body and extends to the outside of the valve body. A circle of gears is arranged on one surface of the valve rod in the ball core passage;

[0011] Driving device, the driving device is connected to the upper end of the valve rod and is used to drive the valve rod to drive the C-shaped ball core to rotate so that the ball core sealing surface of the C-shaped ball core is matched and sealed with the valve seat or the ball core passage of the C-shaped ball core is aligned with the fluid passage;

[0012] Sealing seat, the sealing seat is arranged at the fluid outlet of the fluid passage and is hermetically connected to the valve body. A slideway perpendicular to the valve rod is arranged on the sealing seat, and a liquid outlet hole communicating the fluid passage with the fluid outlet is arranged on the side wall of the slideway;

[0013] Valve core, the valve core is slidably connected in the slideway and can slide along the slideway to block or leave the orifice of the liquid outlet hole;

[0014] Pin shaft, the pin shaft is perpendicular to the valve rod, one end of which is connected to the valve core, and the other end is provided with a rack and is connected to the valve rod through meshing connection with the gear to convert the rotational movement of the valve rod into the translational movement of the pin shaft to drive the valve core to slide along the slideway. When the ball core sealing surface of the C-shaped ball core is matched and sealed with the valve seat, the valve core blocks the orifice of the liquid outlet hole. When the ball core passage of the C-shaped ball core is aligned with the fluid passage, the valve core leaves the orifice of the liquid outlet hole.

[0015] Preferably, a sealing ring is press-fitted between the valve core and the side wall of the slideway.

[0016] Preferably, there are several liquid outlet holes, which are arranged in an array on the surface of the side wall of the slideway along the sliding direction of the valve core.

[0017] Preferably, the driving device is a handwheel or a valve actuator.

[0018] Advantages of the present utility model:

[0019] Compared with the prior art, the advantages of the present utility model are:

[0020] Based on the existing C-type ball valve, the utility model combines the structure of an axial regulating valve, realizes the dual-control linkage of the ball valve and the axial regulating valve, enhances the stability and reliability of the valve stem of the C-type ball valve, and adds a forced seal at the downstream end of the C-type ball. When the sealing performance of the upstream valve seat deteriorates, the downstream axial forced seal can effectively make up for the failure of the upstream valve seat, improve the sealing performance of the entire valve, and ensure that the medium does not leak. The downstream axial regulating valve core can more precisely control the medium flow rate and pressure at the outlet end of the valve, realizing the function of multiple uses of one valve, and can adapt to more complex working conditions. At the same time, when the entire valve fails, considering that the maintenance time of the C-type ball valve is relatively long, when emergency maintenance is required, the sealing performance of the valve can be ensured by directly replacing the downstream seal, avoiding the losses caused by long-term shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 6 is a schematic structural view of the dual-control linkage valve of the present utility model when it is closed;

[0022] Figure 2 FIG. 10 is a schematic structural view of the dual-control linkage valve of the present utility model when it is opened;

[0023] Figure 3 is Figure 2 a partial enlarged view of part A in FIG.

[0024] Figure 4 FIG. 20 is a schematic structural view of the prior art. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper / lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "set / sleeved with", "socket connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Please refer to Figures 1-3 , the present utility model provides a technical solution: a double-control linkage valve, including:

[0029] A valve body 1, a fluid passage penetrating the valve body 1 is provided on the valve body 1, and both ends of the fluid passage are a fluid inlet 11 and a fluid outlet 12 respectively;

[0030] A valve seat 2, the valve seat 2 is arranged on one side of the fluid inlet 11 in the fluid passage;

[0031] A C-shaped ball core 3, the C-shaped ball core 3 includes a ball core sealing surface 31 capable of being matched and sealed with the valve seat 2 and a ball core passage 32 penetrating the C-shaped ball core 3, and the C-shaped ball core 3 is rotatably connected in the fluid passage;

[0032] A valve stem 4, the valve stem 4 is perpendicular to the fluid passage and is rotatably arranged on the valve body 1, the lower end of the valve stem 4 penetrates through the C-shaped ball core 3 and the ball core passage 32 and is connected to the bottom of the valve body 1, and its upper end penetrates through the top of the valve body 1 and extends outside the valve body 1. A circle of gears 41 is arranged on one surface of the valve stem 4 in the ball core passage 32;

[0033] A driving device 5, the driving device 5 is connected to the upper end of the valve stem 4 for driving the valve stem 4 to drive the C-shaped ball core 3 to rotate so that the ball core sealing surface 31 of the C-shaped ball core 3 is matched and sealed with the valve seat 2 or the ball core passage 32 of the C-shaped ball core 3 is aligned with the fluid passage;

[0034] A sealing seat 6, the sealing seat 6 is arranged at the fluid outlet 12 of the fluid passage and is hermetically connected to the valve body 1. A slideway 61 perpendicular to the valve stem 4 is arranged on the sealing seat 6, and a liquid outlet hole 62 communicating the fluid passage with the fluid outlet 12 is arranged on the side wall of the slideway 61;

[0035] A valve core 7, the valve core 7 is slidably connected in the slideway 61 and can slide along the slideway 61 to block or leave the orifice of the liquid outlet hole 62;

[0036] The pin shaft 8, the pin shaft 8 is perpendicular to the valve stem 4, one end thereof is connected to the valve core 7, the other end is provided with a rack 81 and is connected to the valve stem 4 through the meshing connection of the rack 81 and the gear 41 to convert the rotational motion of the valve stem 4 into the translational motion of the pin shaft 8 to drive the valve core 7 to slide along the slideway 61. When the ball core sealing surface 31 of the C-shaped ball core 3 is hermetically matched with the valve seat 2, the valve core 7 blocks the orifice of the liquid outlet hole 62. When the ball core channel 32 of the C-shaped ball core 3 is aligned with the fluid channel, the valve core 7 leaves the orifice of the liquid outlet hole 62.

[0037] When opening the valve, operate the driving device 5 to drive the valve stem 4 to drive the C-shaped ball core 3 to rotate so that the ball core channel 32 of the C-shaped ball core 3 is aligned with the fluid channel. At the same time, the pin shaft 8 connected to the valve stem 4 through the meshing connection of the rack 81 and the gear 41 drives the valve core 7 to slide along the slideway 61, so that the valve core 7 leaves the orifice of the liquid outlet hole 62, thereby connecting the fluid inlet 11 and the fluid outlet 12 at both ends of the fluid channel; when closing the valve, operate the driving device 5 to drive the valve stem 4 to drive the C-shaped ball core 3 to rotate in reverse so that the ball core sealing surface 31 of the C-shaped ball core 3 is hermetically matched with the valve seat 2. At the same time, the pin shaft 8 connected to the valve stem 4 through the meshing connection of the rack 81 and the gear 41 drives the valve core 7 to slide in the reverse direction along the slideway 61, so that the valve core 7 blocks the orifice of the liquid outlet hole 62, thereby cutting off the fluid channel to achieve sealing, so as to realize the dual-control linkage control of the upstream and downstream seals during the opening and closing processes of the valve.

[0038] On the basis of the existing C-shaped ball valve, the present utility model combines the structure of an axial regulating valve, realizes the dual-control linkage control of the ball valve and the axial regulating valve, and at the same time enhances the stability and reliability of the valve stem of the C-shaped ball valve. At the same time, a forced seal is added at the downstream end of the C-shaped ball. When the sealing performance of the upstream valve seat deteriorates, the downstream axial forced seal can effectively make up for the situation of the failure of the upstream valve seat, improving the sealing performance of the entire valve and ensuring that the medium will not leak. The downstream axial regulating valve core can more accurately control the medium flow rate and pressure at the outlet end of the valve, realizing the function of multiple uses of one valve and can adapt to more complex working conditions. At the same time, when the entire valve fails, considering that the maintenance time of the C-shaped ball valve is relatively long, when emergency maintenance is required, the sealing performance of the valve can be ensured by directly replacing the downstream end seal, avoiding the losses caused by long-term shutdown.

[0039] Specifically, in order to realize the synchronous sealing of the two positions of the C-shaped ball core 3 and the valve core 7, the meshing connection position of the rack 81 and the gear 41 can be adjusted.

[0040] Furthermore, a sealing ring 9 is press-fitted between the valve core 7 and the side wall of the slideway 61, thereby improving the sealing performance.

[0041] Furthermore, there are several liquid outlet holes 62, which are arranged in an array along the sliding direction of the valve core 7 on the side wall surface of the slideway 61. During the sliding of the valve core 7 along the slideway 61, the liquid outlet holes 62 are gradually blocked or opened, so as to accurately control the flow rate of the valve.

[0042] Specifically, the driving device 5 is a handwheel or a valve driver.

[0043] It should be noted that in this article, 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 actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-control linkage valve, characterized in that: include: A valve body (1), wherein the valve body (1) is provided with a fluid passage penetrating the valve body (1), and two ends of the fluid passage are respectively a fluid inlet (11) and a fluid outlet (12); A valve seat (2), the valve seat (2) being arranged on one side of a fluid inlet (11) in the fluid channel; A C-shaped ball core (3), the C-shaped ball core (3) comprising a ball core sealing surface (31) capable of matching and sealing with the valve seat (2) and a ball core channel (32) passing through the C-shaped ball core (3), the C-shaped ball core (3) being rotatably connected in the fluid channel; A valve stem (4), the valve stem (4) being perpendicular to the fluid channel and rotatably arranged on the valve body (1), the lower end of the valve stem (4) passing through the C-shaped ball core (3) and the ball core channel (32) and connected to the bottom of the valve body (1), and the upper end of the valve stem (4) passing through the top of the valve body (1) and extending to the outside of the valve body (1), and a circle of gears (41) being arranged on a surface of the valve stem (4) in the ball core channel (32); A driving device (5), the driving device (5) being connected to the upper end of the valve stem (4) and being used to drive the valve stem (4) to drive the C-shaped ball core (3) to rotate so that the ball core sealing surface (31) of the C-shaped ball core (3) matches and seals with the valve seat (2) or so that the ball core channel (32) of the C-shaped ball core (3) is aligned with the fluid channel; a sealing seat (6), the sealing seat (6) being arranged at the fluid outlet (12) of the fluid channel and being sealingly connected to the valve body (1), the sealing seat (6) being provided with a slideway (61) perpendicular to the valve stem (4), and a liquid outlet hole (62) connecting the fluid channel and the fluid outlet (12) being provided on a side wall of the slideway (61); A valve core (7), the valve core (7) being slidably connected in the slideway (61) and being able to slide along the slideway (61) to seal at the opening of the liquid outlet hole (62) or away from the opening of the liquid outlet hole (62); A pin shaft (8), wherein the pin shaft (8) is perpendicular to the valve stem (4), one end of which is connected to the valve core (7), and the other end of which is provided with a rack (81) and connected to the valve stem (4) through meshing connection between the rack (81) and the gear (41) so as to convert the rotational motion of the valve stem (4) into the translational motion of the pin shaft (8) so as to drive the valve core (7) to slide along the slideway (61); when the ball core sealing surface (31) of the C-type ball core (3) is matched and sealed with the valve seat (2), the valve core (7) is blocked at the orifice of the liquid outlet hole (62); when the ball core channel (32) of the C-type ball core (3) is aligned with the fluid channel, the valve core (7) leaves the orifice of the liquid outlet hole (62).

2. A double-control linkage valve according to claim 1, characterized in that: A sealing ring (9) is crimped between the valve core (7) and the side wall of the slideway (61).

3. A double-control linkage valve according to claim 1, characterized in that: There are a plurality of liquid outlet holes (62) distributed in an array on the side wall surface of the slideway (61) along the sliding direction of the valve core (7).

4. A double-control linkage valve according to claim 1, characterized in that: The driving device (5) is a hand wheel or a valve driver.

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