Double-control valve structure

Abstract

Pipeline flange plates are arranged at the two ends of a valve body, a valve rod piece is used for driving a valve clack to rotate relative to the valve body, the valve clack comprises an outer ring clack and an inner sealing clack, a guide column is arranged on the outer ring clack, the inner sealing clack is arranged on the guide column in a sleeving mode, an abutting plate is fixed to the guide column through a bolt, and a telescopic column is sleeved with a check spring. The two ends of the non-return spring abut against the abutting plate and the inner sealing flap correspondingly, and the non-return spring is used for pushing the inner sealing flap to abut against the sealing outer ring flap; the rotating rod and the valve rod piece are coaxially arranged, the rotating rod rotates relative to the valve clack, and a cam piece is arranged on the rotating rod, rotationally abuts against the inner sealing clack and is used for pushing the inner sealing clack from the rear end to seal the outer ring clack. According to the double-control valve structure, the valve clack is controlled through double control of the valve rod and the rotating rod for adjustment, the double-control valve structure has multiple working states, different functions are achieved in different position states, the opening degree can be adjusted, the sealing face can be protected against medium scouring, the service life is prolonged, the double-control valve structure adapts to more working conditions, and good usability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a dual-control valve structure. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. When the valve is closed, pressure must be applied to the valve core to force the sealing surface to prevent leakage. In the related technology, the stop valve is provided with a valve disc and a valve seat through the inside of the valve body, and the valve disc and the valve seat are provided with sealing surfaces; when the sealing surface of the valve disc fits the sealing surface of the valve seat, the stop valve is in the cut-off state; when the sealing surface of the valve disc separates from the sealing surface of the valve seat, the stop valve is in the conducting state.

[0003] A check valve is a valve that automatically opens and closes the valve disc depending on the flow of the medium itself, and is used to prevent the medium from flowing back. When the fluid medium in the pipeline flows forward, the valve disc leaves the valve seat under the action of the fluid, and the check valve is in a conducting state; when the fluid medium in the pipeline flows reversely, the valve disc returns to a state of being in contact with the valve seat under the action of gravity, elastic parts or fluid, and the check valve changes to a closed state.

[0004] In the prior art, stop valves and check valves are two different valves, but in a medium fluid pipeline system, both are often installed and used at the same time. Under normal working conditions, it is very common to open the stop valve to allow the medium to flow, but set a check valve to prevent the medium from flowing back. The prior art generally adopts the method of setting both at the same time, which is disadvantageous in terms of cost and installation occupancy. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a valve having the functions of a stop valve and a check valve.

[0006] In order to achieve the above objectives, the technical solution adopted by the present invention is: a double-control valve structure, including a valve body, pipeline flanges are arranged at both ends of the valve body, a medium flow channel is arranged therein, and a radial valve stem hole is arranged in the medium flow channel; a valve stem member, the valve stem member is used to drive a valve flap arranged in the inner cavity of the valve body to rotate relative to the valve body, and the valve flap is used to block the medium flow channel and close the valve; the valve flap includes an outer ring flap and an inner sealing flap, the outer ring flap is circumferentially fixedly connected to the valve stem member, a guide column is arranged on the outer ring flap, the inner sealing flap is sleeved on the guide column, a telescopic column is fixed on the inner sealing flap, a butt plate is fixed on the guide column by bolts, a check spring is sleeved on the telescopic column, and the two ends of the check spring are respectively abutted on the butt plate and the inner sealing flap, which is used to push the inner sealing flap to abut and seal the outer ring flap; a rotating rod, the rotating rod is coaxially arranged with the valve stem member, rotates relative to the valve flap, and a cam member is arranged on it to rotatably abut the inner sealing flap, which is used to push the inner sealing flap to seal the outer ring flap from the rear end.

[0007] Preferably, a pressing platform is arranged on the back of the inner sealing flap, the pressing platform has an inclined surface matching the outer arc surface of the cam member, a straight surface is also arranged in the middle of the pressing platform, and a flat surface is arranged at the front end of the cam member to abut against the straight surface.

[0008] Preferably, a sealing surface is provided on the outer ring petal, and a sealing ring surface is provided on the inner sealing petal corresponding to the sealing surface, and the sealing ring surface is fixed to the inner sealing petal by bolts.

[0009] Preferably, a sealing seat is further provided in the valve body, and the sealing seat is made of Teflon material. The sealing seat is provided with two sealing seats extending from both sides of the valve body respectively, and the inner cavity formed by the two sealing seats is spherical and matched with the outer ring petal.

[0010] Preferably, the pipeline flange is fixed by clamping the valve body with bolts, and a mounting seat is also provided in the valve body. A pin is provided between the mounting seat and the pipeline flange, and the mounting seat is provided at the upper and lower ends of the valve disc.

[0011] Preferably, a block is provided at the bottom of the valve stem member to match the groove on the outer ring petal, the block and the groove are used for circumferentially linking the valve stem member and the outer ring petal, an indicator groove is provided at the end of the valve stem member corresponding to the block, the cam member of the rotating rod is fixed relative to the rotating rod through a pin rod, and an indicator surface is provided on the rotating rod in a vertical direction relative to the pin hole.

[0012] Beneficial effects: The double-control valve structure of the present invention is adjusted through the dual control valve disc of the valve stem and the rotating rod. The valve disc has multiple working states. Different position states correspond to the three functions of the valve: cut-off, conduction and check. On this basis, in the conduction state, the valve disc is rotated to a position without a medium flow channel to protect the sealing surface from medium erosion and increase the service life. One valve has the functions of a cut-off valve and a check valve. Through the relative rotation adjustment of the rotating rod, the opening can also be adjusted to a certain extent to realize the function of adjusting the flow rate, adapt to more working conditions, and have good usability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the dual control valve structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the medium flow channel inside the valve of the present invention.

[0015] Figure 3 Schematic diagram of the valve flap structure of an embodiment of the present invention.

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the valve according to an embodiment of the present invention.

[0017] Figure 5 This is a structural state diagram of embodiment 1 of the present invention.

[0018] Figure 6 This is a structural state diagram of embodiment 2 of the present invention.

[0019] Figure 7 This is a structural state diagram of embodiment 3 of the present invention.

[0020] Figure 8 This is a structural state diagram of embodiment 4 of the present invention.

[0021] 1. Valve body; 11. Pipe flange; 12. Medium flow channel; 13. Valve stem hole; 19. Pin; 2. Valve stem member; 25. Block; 26. Slot; 3. Valve flap; 30. Sealing surface; 31. Outer ring flap; 32. Inner sealing flap; 321. Sealing ring surface; 33. Guide column; 34. Telescopic column; 35. Abutment plate; 36. Check spring; 37. Straight surface; 38. Inclined surface; 39. Pressing platform; 4. Turning rod; 41. Cam member; 42. Outer arc surface; 43. Plane; 46. Indicator groove; 47. Indicator surface; 48. Pin hole; 5. Sealing seat; 6. Mounting seat. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] like Figure 1-4 A double-control valve structure shown in the figure comprises a valve body 1, with pipeline flanges 11 arranged at both ends of the valve body 1, a medium flow channel 12 arranged therein, and a radial valve stem hole 13 arranged in the medium flow channel 12;

[0024] A valve stem 2, the valve stem 2 is used to drive a valve flap 3 disposed in the inner cavity of the valve body 1 to rotate relative to the valve body 1, and the valve flap 3 is used to block and close the medium flow channel 12;

[0025] The valve flap 3 includes an outer ring flap 31 and an inner sealing flap 32. The outer ring flap 31 is fixedly connected to the valve stem 2 in the circumferential direction. A guide column 33 is arranged on the outer ring flap 31. The inner sealing flap 32 is sleeved on the guide column 33. A telescopic column 34 is fixed on the inner sealing flap 32. A butt plate 35 is fixed on the guide column 33 by bolts. A check spring 36 is sleeved on the telescopic column 34. Two ends of the check spring 36 are respectively abutted on the butt plate 35 and the inner sealing flap 32, so as to push the inner sealing flap 32 to abut and seal the outer ring flap 31.

[0026] The rotating rod 4 is coaxially arranged with the valve stem 2 and rotates relative to the valve disc 3. A cam member 41 is arranged on the rotating rod 4 to rotatably abut against the inner sealing disc 32 for pushing the inner sealing disc 32 from the rear end to seal the outer ring disc 31.

[0027] As a further configuration of the above scheme, a pressing platform 39 is provided on the back of the inner sealing flap 32. The pressing platform 39 has a slope 38 that matches the outer arc surface 42 of the cam member 41. A straight surface 37 is also provided in the middle of the pressing platform 39. A plane 43 is provided at the front end of the cam member 41 to abut against the straight surface 37.

[0028] As a further configuration of the above solution, a sealing surface 30 is provided on the outer ring flap 31 , and a sealing ring surface 321 is provided on the inner sealing flap 32 corresponding to the sealing surface 30 , and the sealing ring surface 321 is fixed to the inner sealing flap 32 by bolts.

[0029] As a further configuration of the above scheme, a sealing seat 5 is further provided in the valve body 1. The sealing seat 5 is made of Teflon material. The sealing seat 5 is provided with two sealing seats extending from both sides of the valve body 1 respectively. The inner cavity formed by the two sealing seats 5 is spherical and matched with the outer ring petal 31.

[0030] As a further configuration of the above scheme, the pipe flange 11 is fixed by clamping the valve body 1 with bolts, and a mounting seat 6 is also provided in the valve body 1. A pin 19 is provided between the mounting seat 6 and the pipe flange 11. The mounting seat 6 is provided at the upper and lower ends of the valve disc 3.

[0031] As a further configuration of the above scheme, a block 25 is provided at the bottom of the valve stem member 2 to match the groove 26 on the outer ring flap 31. The block 25 and the groove 26 are used to circumferentially link the valve stem member 2 and the outer ring flap 31. An indicator groove 46 is provided at the end of the valve stem member 2 corresponding to the block 25. The cam member 41 of the rotating rod 4 is fixed relative to the rotating rod 4 through a pin rod. An indicator surface 47 is provided on the rotating rod 4 in a vertical direction relative to the pin hole 48.

[0032] A dual control valve structure of the present invention is as follows Figure 1-4 As shown, a valve body 1 is provided, and pipeline flanges 11 are provided at both ends of the valve body 1 through a plurality of bolts, a medium flow channel 12 is processed inside the valve body 1, and a valve stem hole 13 is drilled radially in the medium flow channel 12 for the insertion and installation of the valve stem member 2. The valve stem member 2 of this embodiment adopts the valve stem installation structure of the prior art, and the prior art is directly referred to here without modification;

[0033] As described above, the valve stem 2 of the present embodiment extends into the valve body 1 through the valve stem hole 13 and is connected and fixed on the valve flap 3. The valve stem 2 of the present embodiment is used to drive the valve flap 3 arranged in the inner cavity of the valve body 1 to rotate relative to the valve body 1. The valve flap 3 driven by the valve stem 2 is used to block the medium flow channel 12 and close the valve. The valve flap 3 of the present embodiment can be driven by the valve stem 2 to rotate circumferentially.

[0034] The valve flap arrangement of the present embodiment includes an outer ring flap 31 and an inner sealing flap 32. It is worth noting that the outer ring flap 31 and the sealing seat 5 of the valve body 1 are sealed and slidably provided, and the inner side of the outer ring flap 31 is sealed and matched with the inner sealing flap 32. The inner sealing flap 32 can be fitted on the outer ring flap 31 under the drive of external force, and the through hole reserved on the outer ring flap 31 is completely sealed and blocked, so that the outer ring flap 31 and the inner sealing flap 32 form a whole. As mentioned above, the outer ring flap 31 of the present embodiment is circumferentially fixedly connected to the valve stem 2, and a plurality of guide pillars 33 are also provided on the outer ring flap 31. The inner sealing flap 32 is sleeved on the guide pillars 33 and movably provided relative to the guide pillars 33. A telescopic pillar 34 is fixed on the inner sealing flap 32, and a stop plate 35 is fixed on the guide pillar 33 by bolts. A check spring 36 is sleeved on the telescopic pillar 34. Figure 4 As shown, the plate 35 is provided with a through hole to extend and retract the telescopic column 34. In this embodiment, after the non-return spring 36 is sleeved on the telescopic column 34, its two ends respectively abut on the plate 35 and the inner sealing flap 32. When the medium pressure pushes the inner sealing flap 32 to move backward, the inner sealing flap 32 and the telescopic column 34 move relative to the outer ring flap 31 and the plate 35. The telescopic column 34 extends out of the plate 35, and the non-return spring 36 is compressed and stored. After the medium pressure disappears, the non-return spring 36 elastically resets and pushes the inner sealing flap 32 to reset, and continuously applies elastic pressure on the inner sealing flap 32 to make it abut against the sealing outer ring flap 31 to form a seal.

[0035] It is worth noting that the present embodiment further provides a rotating rod 4, which is coaxially arranged with the valve stem member 2 and rotates relative to the valve disc 3. A cam member 41 is arranged thereon to rotatably abut the inner sealing disc 32, so as to push the inner sealing disc 32 from the rear end to seal the outer ring disc 31. The rotating rod 4 of the present invention is not linked with the valve stem member 2, but can be relatively rotatably arranged, and it can be coaxially arranged with the valve stem member 2, or eccentrically arranged. When eccentrically arranged, a larger clearance hole is required on the outer ring disc 31. The rotating rod 4 of the present embodiment plays a role in realizing the thrust of the inner sealing disc 32 formed by the cam member 41 as the rotating rod 4 rotates in the scheme of the present invention. Firstly, it can control the distance of its successive movements, thereby controlling the medium flow rate, and secondly, it can push it to abut against the inner side of the outer ring disc 31, thereby achieving complete sealing, so as to adapt to different working conditions and make different flexible use settings.

[0036] As a further arrangement of the above scheme, a press platform 39 is arranged on the back of the inner sealing flap 32. The press platform 39 has a slope 38 which matches the outer arc surface 42 of the cam member 41. A straight surface 37 is also arranged in the middle of the press platform 39. A plane 43 is arranged at the front end of the cam member 41 to abut against the straight surface 37. The press platform 39 is arranged on the left and right sides of the slope 38 for the purpose of guiding the cooperation between the cam member 41 and the outer arc surface 42 and gradually pushing it during rotation. In addition, as mentioned above, another functional expansion of the present embodiment includes the ability to perform simple flow adjustment. The purpose of setting the slope 38 is also here. In the process of the cam member 41 abutting against the slope 38, the inner sealing flap 32 will be in a process of slowly moving forward. By staying at any position, the flow can be controlled to maintain the current flow. Furthermore, a plane 43 and a straight surface 37 are arranged to correspond to each other, which are used to stably push the inner sealing flap 32 against the inner sealing surface of the outer ring flap 31.

[0037] As a further configuration of the above scheme, a sealing surface 30 is provided on the outer ring flap 31, and a sealing ring surface 321 is provided on the inner sealing flap 32 corresponding to the sealing surface 30. The sealing ring surface 321 is fixed to the inner sealing flap 32 by bolts. Referring to the similar structure of the butterfly valve plate in the prior art, the sealing ring surface 321 can be made of some rubber materials with elasticity and softness, so that it is convenient to obtain deformation sealing force under the push of the rotating rod 4, and the sealing effect is also better. In addition, the common rubber material is prone to aging and wear under the erosion of the medium fluid. In this embodiment, when the medium channel is fully opened and the medium fluidity is the largest, the sealing surface 30 and the sealing ring surface 321 are rotated to face the inner wall side, thereby avoiding direct erosion of the medium and improving the service life.

[0038] As a further configuration of the above scheme, a sealing seat 5 is further provided in the valve body 1. The sealing seat 5 is made of Teflon material. The sealing seat 5 is provided with two sealing seats extending from both sides of the valve body 1 respectively. The inner cavity formed by the two sealing seats 5 is spherical and matched with the outer ring petal 31. The sealing seat 5 is provided with two sealing seats installed from both sides based on the structure of the valve body 1 of this embodiment that the two sides are connected to the installation pipeline flange 11. This structure can facilitate the installation of the valve body 1, and the two sides are installed in the middle, so that the sealing seat 5 is subjected to pressure from both sides, and the installation is more stable.

[0039] As a further configuration of the above scheme, the pipe flange 11 is fixed by clamping the valve body 1 with bolts, and a mounting seat 6 is also provided in the valve body 1. A pin 19 is provided between the mounting seat 6 and the pipe flange 11. The mounting seat 6 is provided at the upper and lower ends of the valve disc 3 and is padded at both ends of the valve disc 3, so that the valve disc 3 can rub when rotating so that it does not directly contact the valve body 1, thereby reducing the direct wear of the valve body 1.

[0040] As a further arrangement of the above scheme, a block 25 is provided at the bottom of the valve stem member 2 to match the groove 26 on the outer ring flap 31. The block 25 and the groove 26 are used for circumferentially linking the valve stem member 2 and the outer ring flap 31. An indicating groove 46 is provided at the end of the valve stem member 2 corresponding to the block 25. The cam member 41 of the rotating rod 4 is fixed relative to the rotating rod 4 through a pin rod. An indicating surface 47 is provided on the rotating rod 4 in a vertical direction relative to the pin hole 48. The indicating structure of this embodiment is provided to improve controllability and facilitate the operator to observe through the outside of the valve body 1, accurately adjust the complex rotation of the valve flap 3 in the valve, and realize precise control of its relative swing angle.

[0041] As described above, the dual-control valve structure of the present invention has a valve flap 3 disposed in the valve body 1, and the valve flap 3 is configured as an outer ring flap 31 that seals with the sealing seat 5 of the valve body 1 and an inner sealing flap 32 that seals with the outer ring flap 31;

[0042] Example 1: Reference Figure 5 The outer ring flap 31 is arranged on the water inlet side of the valve body 1, and the inner sealing flap 32 is arranged based on the check spring 36. When the medium pressure on the water inlet side is, it moves successively along the guide column 33. After the medium pressure disappears, the inner sealing flap 32 resets the check spring 36 to provide sealing thrust. At this time, the valve realizes the structural application of the check valve.

[0043] Example 2: Reference Figure 6 , the outer ring flap 31 rotates relative to the valve body 1 and maintains a 90° angle with the medium flow channel. At this time, the inner sealing flap 32 and the outer ring flap 31 face the inner wall of the valve body 1, and the medium flows from the rear side. At this time, the valve body 1 is in the maximum medium flow, and the sealing surface of the valve flap 3 is rotated to face the valve body 1, toward the inner cavity wall of the valve body 1, reducing the scouring of the medium, greatly protecting the sealing structure layer installed on the front side of the valve flap 3, and significantly improving the service life of the valve.

[0044] Example 3: Reference Figure 7 The present invention further provides a rotating rod 4 structure, and the rotating rod 4 is provided by a power member that rotates relative to the valve stem member 2. During the rotation cycle, a cam member 41 circumferentially fixed by a pin thereon pushes the inner sealing flap 32 against the inner wall of the outer ring flap 31 to form a strong seal. At this time, the valve flap 3 is a whole, and the valve flap 3 will not bounce when the medium pressure is applied. At this time, the valve flap 3 rotates to the flow direction of the medium flow channel, and the stop valve effect can be achieved on both the water inlet side and the water outlet side. Moreover, when it is located on the water outlet side, the medium pressure can also be used to enhance the sealing effect.

[0045] Example 4: Reference Figure 8As described in Example 1, the dual-control valve of this embodiment can realize the check valve solution and at the same time, can also rotate the rotating rod 4 to make the cam member 41 relatively rotate and abut the inner sealing flap 32. The significance of this operation is that by pushing the inner sealing flap 32, its opening and medium flow rate can be limited, so as to meet the use requirements under special working conditions.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention belong to the scope of the present invention and its equivalent technology, the present invention is also intended to include these changes and variations.

Claims

1. A dual control valve structure, characterized in that: include: A valve body (1), with pipeline flanges (11) arranged at both ends of the valve body (1), a medium flow channel (12) arranged therein, and a radial valve stem hole (13) arranged in the medium flow channel (12); A valve stem (2), the valve stem (2) being used to drive a valve flap (3) disposed in the inner cavity of the valve body (1) to rotate relative to the valve body (1), the valve flap (3) being used to seal and close the medium flow channel (12); The valve flap (3) comprises an outer ring flap (31) and an inner sealing flap (32), wherein the outer ring flap (31) is fixedly connected to the valve stem (2) in a circumferential direction, a guide column (33) is arranged on the outer ring flap (31), the inner sealing flap (32) is sleeved on the guide column (33), a telescopic column (34) is fixed on the inner sealing flap (32), a stop plate (35) is fixed on the guide column (33) by bolts, a check spring (36) is sleeved on the telescopic column (34), and two ends of the check spring (36) are respectively abutted on the abutment plate (35) and the inner sealing flap (32), so as to push the inner sealing flap (32) to abut against the outer ring flap (31) to seal; The rotating rod (4) is coaxially arranged with the valve stem member (2) and rotates relative to the valve flap (3). A cam member (41) is arranged on the rotating rod (4) to rotatably abut against the inner sealing flap (32) and is used to push the inner sealing flap (32) from the rear end to seal the outer ring flap (31).

2. A dual control valve structure according to claim 1, characterized in that: A pressing platform (39) is arranged on the back of the inner sealing flap (32), and the pressing platform (39) has an inclined surface (38) that matches the outer arc surface (42) of the cam member (41). A straight surface (37) is also arranged in the middle of the pressing platform (39), and a flat surface (43) is arranged at the front end of the cam member (41) to abut against the straight surface (37).

3. A dual control valve structure according to claim 1, characterized in that: The outer ring flap (31) is provided with a sealing surface (30), and the inner sealing flap (32) is provided with a sealing ring surface (321) corresponding to the sealing surface (30), and the sealing ring surface (321) is fixed to the inner sealing flap (32) by bolts.

4. A dual control valve structure according to claim 1, characterized in that: A sealing seat (5) is also provided in the valve body (1). The sealing seat (5) is made of Teflon material. The sealing seat (5) is provided with two sealing seats extending from two sides of the valve body (1) respectively. The inner cavity formed by the two sealing seats (5) is spherical and is matched with the outer ring valve (31).

5. A dual control valve structure according to claim 1, characterized in that: The pipeline flange (11) is fixed to the valve body (1) by bolts, and a mounting seat (6) is also provided in the valve body (1). A pin (19) is provided between the mounting seat (6) and the pipeline flange (11), and the mounting seat (6) is provided at the upper and lower ends of the valve disc (3).

6. A dual control valve structure according to claim 1, characterized in that: A clamping block (25) is arranged at the bottom of the valve stem member (2) to match the clamping groove (26) on the outer ring flap (31); the clamping block (25) and the clamping groove (26) are used to circumferentially link the valve stem member (2) and the outer ring flap (31); an indicating groove (46) is arranged at the end of the valve stem member (2) corresponding to the clamping block (25); the cam member (41) of the rotating rod (4) is fixed relative to the rotating rod (4) by a pin rod; and an indicating surface (47) is arranged on the rotating rod (4) in a vertical direction relative to the pin hole (48).

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