Ball valve assembling device

Abstract

The utility model discloses a ball valve assembling device, relates to the technical field of valve production, and aims to solve the problem of valve leakage caused by insufficient coaxiality of a valve seat sealing surface and a ball core. The assembling device of the ball valve comprises a frame body, a first moving part, a second moving part, a hollow rod, a push-pull rod, a first elastic element, a supporting part and a connecting line, the first moving part and the second moving part are arranged in the frame body in a relative moving mode and provided with protruding parts, and at least part of the protruding parts is located between the first moving part and the second moving part; the protruding part is provided with a through hole in the relative moving direction of the first moving part and the second moving part, the protruding part is used for being coaxially sleeved with a valve body and a valve seat of the ball valve, the valve seat is coaxially connected with a sealing ring, and the connecting line in the hollow rod controls opening or closing of the supporting component to achieve supporting of the sealing ring. The assembling device of the ball valve is used for improving the coaxiality of the sealing face and the ball core when the valve seat is sealed, and leakage caused by insufficient coaxiality of the valve is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of valve production, in particular to an assembly device for a ball valve. Background Art

[0002] At present, for the assembly of a ball valve, the valve stem is installed on the valve body, and then the ball core is installed in the valve body. Valve seats and joints are installed on both sides of the ball core, and then screws are tightened. The assembly of the prior art will result in insufficient coaxiality between the sealing surface of the valve seat and the ball core during sealing, leading to leakage of the valve. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an assembly device for a ball valve, which is used to improve the coaxiality between the sealing surface of the valve seat and the ball core, and prevent the valve from leaking due to insufficient coaxiality.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An assembly device for a ball valve, comprising:

[0006] A frame body, a first moving member, a second moving member, a hollow rod, a push-pull rod, a first elastic element, a supporting member and a connecting line;

[0007] The first moving member and the second moving member are relatively movably arranged on the frame body. Both the first moving member and the second moving member are provided with protruding portions, at least part of the protruding portions are located between the first moving member and the second moving member. The protruding portions are provided with through holes along the direction of relative movement of the first moving member and the second moving member. The outer parts of the protruding portions of the first moving member and the second moving member are respectively used for coaxially sleeving two groups of split valve bodies and valve seats of the ball valve. One end of the two valve seats facing each other is coaxially connected with a sealing ring;

[0008] The hollow rod is axially movably penetrated in the through hole. The inner peripheral surface of the through hole is provided with a limiting member, and the limiting member is used to limit the axial position of the hollow rod in the through hole;

[0009] The push-pull rod is axially movably arranged in the hollow rod, and one end of the push-pull rod extends out of the end of the hollow rod far from the valve seat;

[0010] One end of the supporting member is rotatably connected to the outer edge of the hollow rod close to the valve seat, and the other end of the supporting member is used to contact and support the sealing ring;

[0011] The first elastic element connects the hollow rod and the supporting member, and is used to apply an elastic force to the supporting member to rotate away from the axis of the hollow rod;

[0012] The connecting line is located in the hollow rod and connects the push-pull rod and the supporting member, and is used to pull the supporting member to rotate close to the axis of the hollow rod.

[0013] Optionally, in the ball valve assembly device provided in this embodiment, the hollow rod is a hollow lead screw, the limiting member is a fixed nut, the fixed nut is fixedly arranged in the through hole, and the hollow lead screw is threadedly connected to the fixed nut.

[0014] Optionally, in the ball valve assembly device provided in this embodiment, the push-pull rod is a screw rod, the inside of the hollow lead screw is provided with threads, and the screw rod is threadedly connected to the inside of the hollow lead screw.

[0015] Optionally, in the ball valve assembly device provided in this embodiment, the connecting line is fixedly connected to one end of the support member away from the hollow rod.

[0016] Optionally, in the ball valve assembly device provided in this embodiment, the support member includes a plurality of support rods arranged circumferentially along the outer edge of the hollow rod. One end of the support rod is rotatably connected to one end of the hollow rod close to the valve seat, and the other end of the support rod contacts and supports the sealing ring.

[0017] Optionally, in the ball valve assembly device provided in this embodiment, it further includes a plurality of rope guide sleeves. The plurality of rope guide sleeves are arranged in the hollow rod along the circumferential and axial directions of the hollow rod. The rope guide sleeves are used to pass through the connecting line to make the connecting line parallel to the hollow rod.

[0018] Optionally, in the ball valve assembly device provided in this embodiment, it further includes a plurality of second elastic elements. The second elastic elements connect the connecting line and the rope guide sleeves, and the second elastic elements are used to tighten the connecting line.

[0019] Optionally, in the ball valve assembly device provided in this embodiment, the elastic force of the first elastic element is greater than the total elastic force of the plurality of second elastic elements.

[0020] Optionally, in the ball valve assembly device provided in this embodiment, the frame body includes a support column, an upper support plate, side support plates and a base. The upper support plate and the base are arranged opposite to each other, the side support plates are respectively connected to the upper support plate and the base, both ends of the support column are respectively connected to the base and the upper support plate, and the first moving member and the second moving member are movably connected to the base and the upper support plate.

[0021] Optionally, in the ball valve assembly device provided in this embodiment, it further includes a gear and two racks. The gear is rotatably connected to the frame body, the two racks are respectively fixedly connected to the first moving member and the second moving member, the tooth surfaces of the two racks are arranged vertically opposite to each other, and the gear is respectively engaged with the two racks to drive the two racks to move relatively so as to drive the first moving member and the second moving member to move relatively.

[0022] Compared with the prior art, in the ball valve assembling device provided by the utility model, the ball core to be assembled is placed on the base. After the placement is completed, the valve bodies to be assembled on the ball core are respectively sleeved on the convex parts on both sides. The valve seat is coaxially fixedly connected to the installation surface of the valve body, and the sealing ring is coaxially arranged on the valve seat. The valve seat and the sealing ring are aligned with the installation part on the ball core. When performing the coaxial assembly of the valve seat and the ball core, by adjusting the first moving part and the second moving part to move towards each other, since the convex parts are arranged on the first moving part and the second moving part, the mutual movement of the first moving part and the second moving part drives the valve seat and the sealing ring fixedly connected to the convex parts to move towards each other. By adjusting the push-pull rod axially away from the valve seat along the hollow rod, the connection line connected to the push-pull rod pulls the support component, and the support component contracts towards the center of the hollow rod. At this time, the support component arranged on the hollow rod is passed through the through hole along with the hollow rod until one end reaches the sealing ring. Then, the push-pull rod is moved in the direction towards the valve seat, and the tension of the connection line decreases. Due to the reset action of the first elastic element, the support component expands towards the periphery, and the support component supports on the inner peripheral surface of the sealing ring, and the sealing ring tightly fits on the valve seat, so that the coaxiality of the sealing ring and the valve seat is ensured, and the sealing ring forms a sealing surface. When performing the coaxial assembly of the valve seat and the ball core, since the coaxiality of the sealing ring and the valve seat is ensured by the support component, the coaxiality of the sealing surface of the valve seat and the ball core is improved, and the problem of valve leakage caused by insufficient coaxiality is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0024] Figure 1 is an aerial view of an assembling device for a ball valve in an embodiment of the present utility model;

[0025] Figure 2 is a front view of an assembling device for a ball valve in an embodiment of the present utility model;

[0026] Figure 3 is a side view of an assembling device for a ball valve in an embodiment of the present utility model;

[0027] Figure 4 is a top view of an assembling device for a ball valve in an embodiment of the present utility model;

[0028] Figure 5 is a partial enlarged view of an assembling device for a ball valve in an embodiment of the present utility model when the support component contracts;

[0029] Figure 6It is a partially enlarged view when the support component of an assembly device for a ball valve in an embodiment of the present utility model expands;

[0030] Figure 7 It is a partially enlarged view of the connection between the support component and the hollow rod of an assembly device for a ball valve in an embodiment of the present utility model.

[0031] Wherein, 1 is a frame body, 11 is a support column, 12 is an upper support plate, 13 is a side support plate, 14 is a base, 2 is a first moving member, 231 is a convex portion, 232 is a through hole, 3 is a second moving member, 41 is a hollow rod, 42 is a first elastic element, 43 is a support component, 44 is a limiting member, 45 is a connecting line, 46 is a push-pull rod, 47 is a rope guide sleeve, 48 is a second elastic element, 5 is a gear, 6 is a rack, 7 is a valve body, 8 is a valve seat, and 9 is a sealing ring. Detailed implementation manners

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined. The meaning of "several" is one or more unless otherwise specifically defined.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", 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 thus cannot be understood as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between 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.

[0037] Please refer to Figure 1 , the assembly device of the ball valve provided by the embodiment of the present utility model includes: a frame body 1, a first moving member 2, a second moving member 3, a hollow rod 41, a push-pull rod 46, a first elastic element 42, a support member 43, and a connecting line 45. The first moving member 2 and the second moving member 3 are relatively movably arranged in the frame body 1. Both the first moving member 2 and the second moving member 3 are provided with a protruding portion 231. At least part of the protruding portion 231 is located between the first moving member 2 and the second moving member 3. The protruding portion 231 is provided with a through hole 232 along the direction of relative movement of the first moving member 2 and the second moving member 3. The outer parts of the protruding portions 231 of the first moving member 2 and the second moving member 3 are both used for coaxially sleeving two split valve bodies 7 and valve seats 8 of the ball valve. One end of the two relatively valve seats 8 is coaxially connected with a sealing ring 9; the hollow rod 41 is axially movably inserted into the through hole 232. The inner peripheral surface of the through hole 232 is provided with a limiting member 44 for limiting the axial position of the hollow rod 41 in the through hole 232; the push-pull rod 46 is axially movably arranged in the hollow rod 41, and one end of the push-pull rod 46 extends out of the end of the hollow rod 41 away from the valve seat 8; one end of the support member 43 is rotatably connected to the outer edge of the hollow rod 41 close to the valve seat 8, and the other end of the support member 43 is used for contacting and supporting the sealing ring 9; the first elastic element 42 connects the hollow rod 41 and the support member 43, and is used for applying an elastic force to the support member 43 to rotate away from the axis of the hollow rod 41; the connecting line 45 is located in the hollow rod 41 and connects the push-pull rod 46 and the support member 43, and is used for pulling the support member 43 to rotate close to the axis of the hollow rod 41.

[0038] During specific implementation: Place the ball core to be assembled on the base 14. After placement, sleeved the valve body 7 to be assembled on the ball core on the convex portions 231 on both sides respectively. The valve seat 8 is coaxially and fixedly connected to the surface to be installed of the valve body 7. The sealing ring 9 is coaxially arranged on the valve seat 8. Align the valve seat 8 and the sealing ring 9 with the installation position on the ball core. When assembling the valve seat 8 and the ball core coaxially, by adjusting the first moving member 2 and the second moving member 3 to move towards each other. Since the convex portions 231 are formed on the first moving member 2 and the second moving member 3, the opposite movement of the first moving member 2 and the second moving member 3 drives the valve seat 8 and the sealing ring 9 fixedly connected to the valve body 7 on the convex portions 231 to move towards each other. By adjusting the push-pull rod 46 away from the valve seat 8 along the axial direction of the hollow rod 41, the connection line 45 connected to the push-pull rod 46 pulls the support member 43, and the support member 43 contracts towards the center of the hollow rod 41. At this time, the support member 43 arranged on the hollow rod 41 passes through the through hole 232 along with the hollow rod 41 until one end reaches the sealing ring 9. Then move the push-pull rod 46 in the direction towards the valve seat 8, the pulling force of the connection line 45 decreases, and the support member 43 expands towards the surrounding due to the reset action of the first elastic element 42. The support member 43 supports on the inner peripheral surface of the sealing ring 9, and the sealing ring 9 tightly fits on the valve seat 8, so that the sealing ring 9 and the valve seat 8 ensure coaxiality, and the sealing ring 9 forms a sealing surface. Then, the two valve bodies 7 can be fixed by bolts to complete the assembly of the ball core and the two groups of valve bodies 7, valve seats 8 and sealing rings 9. When assembling the valve seat 8 and the ball core coaxially, since the coaxiality of the sealing ring 9 and the valve seat 8 is ensured by the support member 43, the coaxiality of the sealing surface of the valve seat 8 and the ball core is improved, and the problem of valve leakage due to insufficient coaxiality is avoided.

[0039] As a possible implementation manner, such as Figure 5 or Figure 6As shown, the hollow rod 41 is a hollow lead screw, and the limiting member 44 is a fixed nut. The fixed nut is fixedly arranged in the through hole 232, and the hollow lead screw is threadedly connected with the fixed nut. That is, a fixed nut is fixedly arranged in the through hole 232. The axis of the fixed nut is collinear with the axis of the through hole 232. The fixed nut is used to fix the hollow lead screw to be inserted. The outer part of the hollow lead screw is threadedly connected with the fixed nut, achieving the effect of limiting the hollow lead screw in the through hole 232. It should be noted that a support member 43 is connected to the outer edge of one end of the hollow lead screw. The outer side of the support member 43 is rotatably connected with the outer peripheral surface of the hollow lead screw through a first elastic element 42. Therefore, the support member 43 can rotate around the outer edge of the hollow lead screw in a direction away from the axis of the hollow lead screw. The purpose of this setting is that the initial state of the support member 43 forms an angle with the outer wall surface of the hollow lead screw. When the support member 43 is in this state, the radial distance of the other end of the support member 43 should be slightly larger than the radial distance of the valve seat 8. Thus, it is ensured that during support, the support member 43 can achieve an interference fit with the sealing ring 9, thereby better realizing the support for the sealing ring 9 and improving the problem of insufficient coaxiality. During specific installation, the push rod 46 can be pulled outwards. Since one end of the push rod 46 extending into the hollow lead screw is connected with a connecting line 45, and the other end of the connecting line 45 is connected with the support member 43, when the push rod 46 is pulled outwards, the support member 43 contracts towards the axis of the hollow lead screw. When it contracts to a certain size, the hollow rod 41 is inserted into the through hole 232 close to the sealing ring 9, and then the push rod 46 is axially moved inwards. Since the first elastic element 42 stores elastic potential energy during the stretching process, when the push rod 46 is axially moved inwards, the first elastic element 42 can reset the support member 43, and the support member 43 extends outwards to achieve an interference fit with the sealing ring 9, thereby realizing the support effect on the sealing ring 9.

[0040] It should be understood that the other end of the connecting line 45 is connected with the support member 43. Therefore, the number of connecting lines 45 should depend on the number of support members 43. If the number of support members 43 is two, the number of connecting lines 45 should also be two. If the number of support members 43 is four, the number of connecting lines 45 should also be four. In this embodiment, the support member 43 is eight support rods, so the number of connecting lines 45 is eight, which are respectively connected with the eight support rods.

[0041] It is worth mentioning that a handle can be installed on the part of the hollow lead screw extending out of the device. The hollow lead screw can be screwed onto the fixed nut and fixed by rotating the handle. It is also possible to manually rotate the hollow lead screw to achieve the effect of fixing the hollow lead screw on the fixed nut.

[0042] As a possible implementation, such as Figure 5 or Figure 6As shown, the push-pull rod 46 is a screw rod. The inside of the hollow lead screw is provided with threads, and the screw rod is threadedly connected to the inside of the hollow lead screw. That is, one end of the connecting line 45 is connected to the support member 43, and the other end of the connecting line 45 is fixedly connected to the screw rod. During specific installation: Connect one end of several connecting lines 45 to the inner side of the support member 43. The inner side of the support member 43 refers to: Since the initial state of the support member 43 is connected to the outer edge of the hollow lead screw and forms an angle with the outer side wall of the hollow lead screw, the range of the degree of this angle is 90° - 180°. Specifically, it can be 130°, 145°, 160°, etc. The plane where the support member 43 is located in the plane of a surface adjacent to the outer side wall of the hollow lead screw is the outer side of the support member 43, and the opposite surface is the inner side of the support member 43. Then pass several connecting lines 45 through the inside of the hollow lead screw and fix them to the end face of the screw rod extending into the hollow lead screw. At this time, the screw rod is threadedly connected to the other end of the hollow lead screw. By rotating the screw rod, the threaded connection degree between the screw rod and the hollow lead screw is adjusted, driving the connecting line 45 to rotate. When the connecting line 45 rotates, it will drive the connecting line 45 to move towards the position of the screw rod. Since one end of the connecting line 45 is connected to the support member 43, moving the connecting line 45 will cause the angle between the support member 43 and the outer peripheral surface of the hollow lead screw to change. First, move the connecting line 45 outwards so that the angle between the support member 43 and the outer wall surface of the hollow lead screw reaches 180°. Then, send the end of the support member 43 away from the hollow lead screw through the through hole 232 to the vertical plane to be supported with the valve seat 8. Next, move the connecting line 45 inwards, and the angle between the support member 43 and the outer peripheral surface of the hollow lead screw becomes larger and returns to the initial angle. In this way, when the support member 43 is in supporting contact with the inner peripheral surface of the sealing ring 9, the assembly is completed. Then move the connecting line 45 outwards so that the angle between the support member 43 and the outer wall surface of the hollow lead screw reaches 180°, and the hollow lead screw is withdrawn from the through hole 232 to fix the next ball valve.

[0043] As an optimization, as Figure 5 or Figure 6 shown, the position where the connecting line 45 is fixedly connected to the support member 43 is located at the distal end of the support member 43 relative to the hollow rod 41. It should be understood that the connecting line 45 is fixedly connected to the support member 43. The connection method can be to set a protrusion at a certain position on the inner side of the support member 43 and fix the connecting line 45 to this protrusion to complete the connection between the connecting line 45 and the support member 43. The position of the protrusion is set at a position far from the hollow rod 41 compared to the midpoint of the support member 43. Preferably, this protrusion is set at the most distal end of the support member 43 relative to the hollow rod 41. When the connecting line 45 stretches the support member 43, the torque is larger, and a smaller force can be used to achieve the rotation of the support member 43.

[0044] Furthermore, as Figure 5 or Figure 6The shown support member 43 includes a plurality of support rods arranged circumferentially along the outer edge of the hollow rod 41. One end of the support rod is rotatably connected to one end of the hollow rod 41 close to the valve seat 8, and the other end of the support rod contacts and supports the sealing ring 9. That is, the support member 43 is a supporting structure formed by arranging a plurality of support rods according to a certain rule. Among them, the plurality of support rods in this embodiment means that the number of support rods can be two. The two support rods are symmetrically distributed and supported on the sealing ring 9 with the axis of the hollow rod 41 as the center of symmetry; the number of support rods can also be three. The three support rods are symmetrically distributed and supported on the sealing ring 9 with the axis of the hollow rod 41 as the center of symmetry; the number of support rods can be four, five, six, seven, eight or more, and all are symmetrically distributed and supported on the sealing ring 9 with the axis of the hollow rod 41 as the center of symmetry.

[0045] As a preferred method, eight support rods are used in this embodiment. The eight support rods are symmetrically distributed and supported on the sealing ring 9 with the axis of the hollow rod 41 as the center. The advantages of such a setting are as follows: When using eight support rods and fixing the free ends of the support rods that can move in space to support the sealing ring 9, the contact area between the plurality of support rods and the sealing ring 9 is relatively large, achieving the effect that the entire circumference of the sealing ring 9 is evenly and comprehensively covered by the supporting force, increasing the stability of the support, so that the sealing ring 9 is not likely to shift or shake relative to the valve seat 8 and the ball core during the assembly process, thereby improving the coaxiality of the sealing surface between the ball core and the valve seat 8 during the assembly of the ball valve.

[0046] It should be noted that the sealing ring 9 is circular. The contact support of the support member 43 on the sealing ring 9 mentioned in this article is that one end of the support member 43 extends into the inner circumferential surface of the sealing ring 9 for contact support.

[0047] It is worth mentioning that the shape of the support member 43 includes but is not limited to the case of support rods or support plates. When the shape of the support member 43 is a support plate, it is necessary to consider that the width of the support plate is smaller than the diameter of the through hole 232 opened in the convex portion 231 to ensure that the hollow rod 41 connected with the support plate can extend into the convex portion 231, so as to bring the support plate into contact with the sealing ring 9.

[0048] As a possible implementation, it further includes a plurality of rope guide sleeves 47. The plurality of rope guide sleeves 47 are arranged inside the hollow rod 41 along the axial and circumferential directions of the hollow rod 41. The rope guide sleeves 47 are used to pass through the connecting line 45 to make the connecting line 45 parallel to the hollow rod 41. By arranging a plurality of rope guide sleeves 47 inside the hollow rod 41 and setting the connecting line 45 to pass through the rope guide sleeves 47 and be arranged inside the hollow rod 41, the number of the rope guide sleeves 47 is not limited. A plurality of rope guide sleeves 47 are arranged in a circumferential circle around the inner circumferential surface of the hollow rod 41. Here, the plurality should be the same as the number of the connecting lines 45, so that each connecting line 45 can pass through the rope guide sleeve 47 and be connected to the support member 43. The purpose of arranging the rope guide sleeves 47 is to make the connecting line 45 parallel to the hollow rod 41 and limit the connecting line 45 to ensure that when the connecting line 45 is pulled, the connecting line 45 will not be disordered, thus unable to achieve a good stretching effect on the support member 43.

[0049] As a possible implementation, it further includes a second elastic element 48. One end of the second elastic element 48 is fixedly connected to the connecting line 45, and the other end is fixedly connected to the rope guide sleeve 47. The second elastic element 48 is used to tighten the connecting line 45. The structure of the second elastic element 48 is not limited, but it should be able to stretch the connecting line 45 so that the connecting line 45 can be in a taut state to ensure the smooth progress of the operation. The working principle of the second elastic element 48 is as follows: On the connecting line 45 between every two rope guide sleeves 47 in the axial direction inside the hollow rod 41, a second elastic element 48 is arranged. Among them, one end of the second elastic element 48 is connected to the rope guide sleeve 47. While ensuring that the second elastic element 48 is in a stretched and extended state, the other end of the second elastic element 48 is connected to the connecting line 45. It should be noted that the second elastic element 48 is in a stretched and extended state. When installed while ensuring that the second elastic element 48 is in a stretched and extended state, the connecting line 45 connected to one end of the second elastic element 48 will receive a pulling force towards the second elastic element 48, thus ensuring that the connecting line 45 is always in a taut state and ensuring that the connecting line 45 can play a role in guiding and stretching the force.

[0050] Furthermore, the elastic force of the first elastic element 42 is greater than the total elastic force of the plurality of second elastic elements 48. Preferably, the elastic force of the first elastic element 42 is much greater than the total elastic force of several second elastic elements 48. It should be understood that the technical effect to be achieved by the first elastic element 42 is to reset the support member 43, while the technical effect achieved by the second elastic element 48 is to make the connecting line 45 taut. The elastic force of the first elastic element 42 exceeds the elastic force of the second elastic element 48, and this excess elastic force is used to support the reset of the support member 43. The more sufficient the excess elastic force is, the easier the reset is.

[0051] As a possible implementation, such as Figure 1As shown in the figure, the frame 1 includes support columns 11, upper support plates 12, side support plates 13 and bases 14. The first moving member 2 and the second moving member 3 are movably connected to the base 14 and the upper support plate 12. The side support plates 13 are respectively connected to the upper support plate 12 and the base 14. One end of the support column 11 is disposed on the base 14, and the other end of the support column 11 is fixedly connected to the upper support plate 12.

[0052] That is, support columns 11 are provided on the outer periphery of the device. Among them, the number of support columns 11 is multiple. That is, the number of support columns 11 can be two, which are respectively arranged at both ends of the base 14; the number of support columns 11 can be four, which are respectively arranged at the four corners of the base 14; the number of support columns 11 can be six, which are respectively arranged at the four corners and the sides of the base 14, etc.

[0053] As a preferred embodiment, the number of support columns 11 of the present utility model is set to four, which are respectively arranged at the four corners of the base 14. The lower ends of the support columns 11 are fixedly arranged on the base 14, and the upper ends are fixedly connected to the upper support plate 12, ensuring the stability of the ball valve assembly device during operation, increasing the strength of the structure. An upper support plate 12 is arranged above the support columns 11. The upper support plate 12 can support the horizontal movement of the first moving member 2 and the second moving member 3, and limit the first moving member 2 and the second moving member 3 in the vertical direction, enhancing the stability during their movement and being beneficial to the assembly of the ball valve.

[0054] As a possible implementation manner, as Figure 1 shown, the ball valve assembly device further includes a gear 5 and two racks 6. One end face of the gear 5 is connected to the frame 1 through a rotating rod. The rotating rod rotates along the axis to drive the gear 5 to rotate. The two racks 6 are respectively fixedly connected to the first moving member 2 and the second moving member 3. The tooth surfaces of the two racks 6 are arranged vertically opposite to each other. The gear 5 meshes with the two racks 6 respectively, and is used to rotate so that the two racks 6 move horizontally relative to each other, thereby driving the first moving member 2 and the second moving member 3 to move relative to each other.

[0055] When aligning the convex portions 231 of the first moving member 2 and the second moving member 3 for ball core installation, the rotatable gear 5 can be rotated so that the two racks 6 engaged therewith move relatively and synchronously. One side of each of the two racks 6 is connected to the first moving member 2 and the second moving member 3 respectively. Thus, by rotating the gear 5, the first moving member 2 and the second moving member 3 can be moved relatively and synchronously, so that the valve bodies 7 sleeved on the first moving member 2 and the second moving member 3 approach each other, thereby causing the valve seats 8 to contact the ball core. With such a setting, the process of the valve seats 8 on both sides of the ball core approaching is made more stable, and the speed at which the first moving member 2 and the second moving member 3 approach can be controlled by controlling the rotation speed of the gear 5 on the rack 6. Since the intervals between the teeth on the rack 6 are uniform, the speeds at which the first moving member 2 and the second moving member 3 approach each other are linearly continuous. In this way, the smoothness of the movement can be ensured, and the contact allowance between the valve seat 8 and the ball core can be controlled more conveniently, so as to avoid the contact damage to the ball core, the valve seat 8 or the device caused by improper operation.

[0056] It is worth mentioning that the way to control the movement of the first moving member 2 and the second moving member 3 can also be to manually contact the opposite sides of the first moving member 2 and the second moving member 3 and squeeze them relatively towards the ball core, which can also achieve the effect of making the valve seat 8 contact the ball core.

[0057] It is worth mentioning that for the first moving member 2 and the second moving member 3 mentioned in this article, the way they move is not limited to sliding, rolling, etc. As long as it can achieve the effect of making the valve bodies 7 provided on the first moving member 2 and the second moving member 3 approach the ball core in the middle, the specific moving way is not limited.

[0058] In the description of the above embodiments, the specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0059] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A ball valve assembly device, characterized in that: It comprises a frame (1), a first moving member (2), a second moving member (3), a hollow rod (41), a push-pull rod (46), a first elastic element (42), a supporting member (43) and a connecting line (45); The first movable member (2) and the second movable member (3) are arranged on the frame (1) for relative movement, the first movable member (2) and the second movable member (3) are both provided with a protrusion (231), at least part of the protrusion (231) is located between the first movable member (2) and the second movable member (3), a through hole (232) is provided on the protrusion (231) along the direction of relative movement of the first movable member (2) and the second movable member (3), the outside of the protrusion (231) of the first movable member (2) and the second movable member (3) are respectively used for coaxially sleeved the two groups of valve bodies (7) and valve seats (8) of the ball valve, and the opposite ends of the two valve seats (8) are coaxially connected with sealing rings (9); The hollow rod (41) is axially movable and penetrates the through hole (232); a limiting component (44) is provided on the inner circumference of the through hole (232); the limiting component (44) is used to limit the axial position of the hollow rod (41) in the through hole (232); The push-pull rod (46) is axially movable and arranged in the hollow rod (41), and one end of the push-pull rod (46) extends out of an end of the hollow rod (41) away from the valve seat (8); One end of the support component (43) is rotatably connected to the outer edge of the hollow rod (41) close to the valve seat (8), and the other end of the support component (43) is used to contact and support the sealing ring (9); The first elastic element (42) connects the hollow rod (41) and the supporting component (43), and is used to apply an elastic force to the supporting component (43) to rotate away from the axis of the hollow rod (41); The connecting line (45) is located inside the hollow rod (41) and connects the push-pull rod (46) and the supporting component (43), and is used to pull the supporting component (43) to rotate close to the axis of the hollow rod (41).

2. The ball valve assembly device according to claim 1, characterized in that: The hollow rod (41) is a hollow lead screw, the limiting component (44) is a fixing nut, the fixing nut is fixedly disposed in the through hole (232), and the hollow lead screw is threadedly connected to the fixing nut.

3. The ball valve assembly device according to claim 2, characterized in that: The push-pull rod (46) is a screw rod, the interior of the hollow screw rod is provided with threads, and the screw rod is threadedly connected to the interior of the hollow screw rod.

4. The ball valve assembly device according to claim 1, characterized in that: The connecting line (45) is fixedly connected to an end of the supporting component (43) away from the hollow rod (41).

5. The ball valve assembly device according to claim 1, characterized in that: The support component (43) includes a plurality of support rods arranged circumferentially along the outer edge of the hollow rod (41), one end of the support rod is rotatably connected to an end of the hollow rod (41) close to the valve seat (8), and the other end of the support rod is in contact with and supported by the sealing ring (9).

6. The ball valve assembly device according to claim 1, characterized in that: It also includes a plurality of rope guide sleeves (47), which are arranged inside the hollow rod (41) along the circumferential direction and axial direction of the hollow rod (41), and the rope guide sleeves (47) are used to pass the connecting line (45) so that the connecting line (45) is parallel to the hollow rod (41).

7. The ball valve assembly device according to claim 6, characterized in that: It also includes a plurality of second elastic elements (48), wherein the second elastic elements (48) connect the connecting line (45) and the rope guide sleeve (47), and the second elastic elements (48) are used to tighten the connecting line (45).

8. The ball valve assembly device according to claim 7, characterized in that: The elastic force of the first elastic element (42) is greater than the total elastic force of the plurality of second elastic elements (48).

9. The ball valve assembly device according to claim 1, characterized in that: The frame (1) comprises a support column (11), an upper support plate (12), a side support plate (13) and a base (14); the upper support plate (12) and the base are arranged opposite to each other; the side support plate (13) is respectively connected to the upper support plate (12) and the base (14); two ends of the support column (11) are respectively connected to the base (14) and the upper support plate (12); the first movable member (2) and the second movable member (3) are movably connected to the base (14) and the upper support plate (12).

10. The ball valve assembly device according to claim 1, characterized in that: It also includes a gear (5) and two racks (6), wherein the gear (5) is rotatably connected to the frame (1), and the two racks (6) are respectively fixedly connected to the first movable member (2) and the second movable member (3), and the tooth surfaces of the two racks (6) are arranged opposite to each other up and down, and the gear (5) is respectively engaged with the two racks (6) to drive the two racks (6) to move relative to each other, thereby driving the first movable member (2) and the second movable member (3) to move relative to each other.

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