Ball positioning structure and ball valve

Abstract

According to the ball positioning structure and the ball valve, a platform is arranged at the top of a ball, a fixing groove penetrating through the plane is formed in the platform, and an auxiliary limiting groove is connected to the platform and the fixing groove in a crossed mode; a protruding table ring is arranged on the outer wall of the middle of the rod body in the length direction, a connector is arranged at the inner end of the rod body in the length direction and is in a plate shape, and protruding edges corresponding to the auxiliary limiting grooves are arranged at the inner end of the protruding table ring in the thickness direction. According to the ball body positioning structure and the ball valve, the free end, away from the protruding table ring, of the connector on the rod body is in the arc shape in the length direction of the connector, so that alignment with the fixing groove is convenient, and when the connector is matched with the fixing groove, the inner end, in the thickness direction, of the protruding table ring is matched with a platform; at the moment, the axial combination stability between the ball body and the valve rod is improved, the protruding edges and the auxiliary limiting grooves are matched, and therefore stable limiting connection is formed in the circumferential direction of the ball body and the valve rod.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to a spherical positioning structure and a ball valve. Background Art

[0002] The connection method between the valve stem and the ball is a crucial link in valve design and application. Its selection not only determines the performance and service life of the valve, but also affects the efficiency and stability of the entire fluid control system. In the general structure, a square groove is set on the ball, and a square bar is set at the bottom of the valve stem. The square bar and the square groove are matched to achieve the circumferential fixation of the two.

[0003] During the installation of some ball valves, the valve stem is first installed in the valve body, and then the ball is installed. In the above structure, there is no longer a square groove on the ball, but a long strip groove that runs through it. After the valve stem is installed first, the ball is pushed into the valve body. At this time, the long strip groove provides a basis for pushing it in. After it is finally installed in place, the square strip is in the middle of the length direction of the long strip groove. However, due to the existence of the above-mentioned long strip groove, there is a possibility of looseness between the valve stem and the ball, so there is uncertainty about the stability of the ball and the valve stem. Utility Model Content

[0004] The main purpose of the utility model is to provide a ball positioning structure and a ball valve, aiming to solve the problem that the existence of the long strip groove in the ball makes it possible for the valve stem and the ball to be loose, so there is uncertainty in the stability of the ball and the valve stem.

[0005] In order to achieve the above object, the utility model provides a ball positioning structure, comprising:

[0006] A sphere, with a channel running through the middle, a platform is provided on the top of the sphere, a fixing groove running through the plane is provided on the platform, and an auxiliary limiting groove is provided on the platform and cross-connected with the fixing groove;

[0007] A valve stem, comprising a stem body, wherein the outer wall of the middle part of the stem body in the length direction is provided with a protruding table ring, the inner end of the stem body in the length direction is a connecting head, the connecting head is plate-shaped, the free end of the connecting head away from the protruding table ring is in an arc shape in the length direction of the connecting head, and the inner end of the protruding table ring in the thickness direction is provided with a protruding rib corresponding to the auxiliary limiting groove, and the height of the protruding rib is less than the minimum height of the connecting head;

[0008] A first sealing ring, arranged on the outer peripheral wall of the rod body and located above the protruding table ring;

[0009] A second sealing ring is arranged corresponding to the upper surface of the protruding table ring;

[0010] Wherein, when the connecting head is matched with the fixing groove, the inner end of the protruding table ring in the thickness direction is matched with the platform.

[0011] Furthermore, the auxiliary limiting groove and the fixing groove form an angle of 45 degrees to 135 degrees.

[0012] Furthermore, the other end of the auxiliary limiting groove in the length direction extends outside the platform.

[0013] Furthermore, the protruding ribs extend to the rod body.

[0014] Furthermore, the thickness of the protruding ribs is 2 to 5 mm.

[0015] Furthermore, the valve stem is a connecting structure on the inner end side of the protruding table ring.

[0016] The utility model also provides a ball valve, including a valve body, two valve covers, two valve seats and the above-mentioned ball positioning structure, the two valve covers are connected to the two end openings of the valve body, the valve seat is clamped between the valve body and the valve seat, and the valve seat forms a seal with the ball.

[0017] Furthermore, a valve stem mounting seat and a bottom cover mounting seat are arranged opposite to each other on the outer wall of the valve body, the valve stem passes through the valve stem mounting seat to form a connection with the ball in the valve body, and the bottom cover is detachably connected to the bottom cover mounting seat.

[0018] Furthermore, a fixing ring is provided on the inner wall of the valve stem mounting seat, and a frusto-conical transition channel with a flared near inner end is axially provided on the fixing ring, and the stem body matches the transition channel in a matching frusto-conical shape, wherein the corresponding position of the first sealing ring is at the transition channel.

[0019] Furthermore, the valve body and the two valve covers are connected via a plurality of bolt assemblies.

[0020] The utility model provides a ball positioning structure and a ball valve, in which the free end of the connecting head on the rod body away from the protruding table ring is in an arc shape in the length direction of the connecting head, thereby realizing convenient alignment with the fixing groove; when the connecting head is matched with the fixing groove, the inner end of the protruding table ring in the thickness direction is matched with the platform, at this time, the axial connection stability between the ball and the valve stem is improved, and the protruding ribs are matched with the auxiliary limiting grooves, so that a stable limiting connection is formed between the ball and the valve stem in the circumferential direction; the first sealing ring realizes sealing in the length direction of the rod body, and the second sealing ring forms a radial sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a ball in the ball positioning structure of the first embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of a valve stem in the ball positioning structure of the first embodiment of the utility model;

[0023] Figure 3 This is a corresponding schematic diagram of the ball and the valve stem in the ball positioning structure of the first embodiment of the utility model (upper perspective);

[0024] Figure 4 This is a corresponding schematic diagram of the ball and the valve stem in the ball positioning structure of the first embodiment of the utility model (from the bottom perspective);

[0025] Figure 5 1 is a schematic diagram of a ball valve according to a second embodiment of the present utility model (a cross section with the ball hidden);

[0026] Figure 6 It is a schematic diagram (longitudinal section) of a ball valve according to a second embodiment of the utility model;

[0027] Figure 7 1 is a schematic diagram of a ball valve according to a third embodiment of the present utility model (a cross section with the ball hidden);

[0028] Figure 8 yes Figure 7 A partial enlarged view of

[0029] Fig. 9 It is a schematic diagram of a ball valve according to the fourth embodiment of the utility model.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0033] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0034] Reference Figures 1 to 9 In one embodiment of the utility model, a ball positioning structure includes:

[0035] The sphere 100 has a channel 110 passing through the middle, a platform 120 is arranged on the top of the sphere 100, a fixing groove 121 passing through the plane is opened on the platform 120, and an auxiliary limiting groove 122 is cross-connected with the fixing groove 121 on the platform 120;

[0036] The valve stem 200 comprises a stem body 210, wherein the outer wall of the middle part of the length direction of the stem body 210 is provided with a protruding bezel 220, and the inner end of the length direction of the stem body 210 is a connector 230, wherein the connector 230 is plate-shaped, and the free end of the connector 230 away from the protruding bezel 220 is in an arc shape in the length direction of the connector 230, and the inner end of the protruding bezel 220 in the thickness direction is provided with a protruding rib 221 corresponding to the auxiliary limiting groove 122, and the height of the protruding rib 221 is less than the minimum height of the connector 230;

[0037] A first sealing ring 300 is disposed on the outer peripheral wall of the rod body 210 and is located above the protruding table ring 220;

[0038] A second sealing ring 400 is disposed corresponding to the upper surface of the protruding table ring 220;

[0039] When the connector 230 is matched with the fixing groove 121 , the inner end of the protruding bezel 220 in the thickness direction is matched with the platform 120 .

[0040] In the prior art, due to the existence of the long strip groove, there is a possibility of looseness between the valve stem and the ball, so the stability of the ball and the valve stem is uncertain.

[0041] In the present invention, a channel 110 is passed through the middle of the sphere 100, and the channel 110 forms a basis for the passage of fluid. A platform 120 is provided on the top of the sphere 100, and a fixing groove 121 that passes through the plane is provided on the platform 120. An auxiliary limiting groove 122 is cross-connected with the fixing groove 121 on the platform 120. The fixing groove 121 and the auxiliary limiting groove 122 form a three-pronged structure.

[0042] The valve stem 200 includes a rod body 210, and a protruding bead 220 is provided on the outer wall of the middle part of the length direction of the rod body 210. The inner end of the rod body 210 in the length direction is a connector 230, which is plate-shaped, and the free end of the connector 230 away from the protruding bead 220 is in an arc shape in the length direction of the connector 230. When the connector 230 is matched with the fixing groove 121, the inner end of the protruding bead 220 in the thickness direction is matched with the platform 120, and the combination stability between the ball 100 and the valve stem 200 is improved. The inner end of the protruding bead 220 in the thickness direction is provided with a protruding rib 221, and the height of the protruding rib 221 is less than the minimum height of the connector 230; when the connector 230 is matched with the fixing groove 121, the protruding rib 221 is matched with the auxiliary limiting groove 122. It should be noted that the height of the protruding ribs 221 should not be too large, otherwise the sphere 100 cannot be installed normally. The specific installation method may be deformation and temporary dislocation.

[0043] The first sealing ring 300 is arranged on the outer peripheral wall of the rod body 210 and is located above the protruding table ring 220. The first sealing ring 300 is used to achieve sealing in the length direction of the rod body 210. The second sealing ring 400 is arranged corresponding to the upper surface of the protruding table ring 220 to form a radial sealing effect. In a specific embodiment, a fixing ring is arranged on the inner wall of the valve stem seat of the ball valve. The position of the first sealing ring 300 corresponds to the inner wall of the fixing ring, so as to form a seal in the length direction of the rod body 210; the second sealing ring 400 is arranged between the lower surface of the fixing ring and the upper surface of the protruding table ring 220, so as to achieve a sealing effect in the radial direction.

[0044] In summary, the free end of the connecting head 230 on the rod body 210 away from the protruding table ring 220 is in an arc shape in the length direction of the connecting head 230, thereby achieving convenient alignment with the fixing groove 121. When the connecting head 230 is matched with the fixing groove 121, the inner end of the protruding table ring 220 in the thickness direction is matched with the platform 120. At this time, the axial connection stability between the ball 100 and the valve stem 200 is improved, and the protruding rib 221 is paired with the auxiliary limiting groove 122, so that the ball 100 and the valve stem 200 form a stable limiting connection in the circumferential direction; the first sealing ring 300 realizes sealing in the length direction of the rod body 210, and the second sealing ring 400 forms a radial sealing effect.

[0045] In one embodiment, the auxiliary limiting groove 122 and the fixing groove 121 form an angle of 45 degrees to 135 degrees.

[0046] In this embodiment, the angle between the auxiliary limiting groove 122 and the fixing groove 121 is limited, which provides a larger space to facilitate the processing of the auxiliary limiting groove 122. At the same time, when the angle is increased, the auxiliary limiting groove 122 has a better auxiliary fixing effect.

[0047] Reference Figure 1 In one embodiment, the other end of the auxiliary limiting groove 122 in the length direction extends outside the platform 120 .

[0048] In this embodiment, by limiting the layout path of the auxiliary limiting groove 122, the processing difficulty of the auxiliary limiting groove 122 is reduced, and the process of aligning the valve stem 200 and the ball 100 is reduced. For example, in some cases, the ball 100 is not cast, and the auxiliary limiting groove 122 needs to be further processed on the main body. In this case, the auxiliary limiting groove 122 is extended outside the platform 120, and the auxiliary limiting groove 122 can be cut out from both directions at one time by a milling cutter.

[0049] In one embodiment, the protruding ribs 221 extend to the rod body 210 .

[0050] In this embodiment, referring to the processing of the auxiliary limiting groove 122 , in the processing of the protruding rib 221 , it is advantageous for the protruding rib 221 to extend to the rod body 210 .

[0051] In one embodiment, the thickness of the protruding ribs 221 is 2 to 5 mm.

[0052] In this embodiment, considering the convenience of installation, since the valve stem 200 is installed before the sphere 100, the thickness of the protruding rib 221 is too large, making the process of installing the sphere 100 impossible to achieve, and if the thickness of the protruding rib 221 is too small, it cannot form a more stable structure with the auxiliary limiting groove 122.

[0053] In one embodiment, the valve stem 200 is a connection structure on the inner end side of the protruding table ring 220 .

[0054] In this embodiment, considering that the valve stem 200 is too long to be installed in some cases, the valve stem 200 is divided into an upper end stem and a lower end stem, and the protruding table ring 220 is arranged on the upper end stem. During the installation process, the lower end stem is fixed between the upper end stem and the ball 100. The segmented structure of the valve stem 200 provides convenience for installation.

[0055] Reference Figures 5 to 6The utility model provides a ball valve, including a valve body 001, two valve covers 002, two valve seats 003 and the above-mentioned ball positioning structure, the two valve covers 002 are connected to the two end openings of the valve body 001, the valve seat 003 is clamped between the valve body 001 and the valve seat 003, and the valve seat 003 forms a seal with the ball 100.

[0056] In this embodiment, the ball valve with the ball positioning structure has a better working effect and the stability of the ball 100 is better.

[0057] In one embodiment, a valve stem mounting seat 011 and a bottom cover mounting seat are disposed on the outer wall of the valve body 001, and the valve stem 200 passes through the valve stem mounting seat 011 to form a connection with the ball 100 in the valve body 001, and a bottom cover is detachably connected to the bottom cover mounting seat.

[0058] In this embodiment, by adding a bottom cover mounting seat, when the bottom cover is installed thereon, a seal is formed at the bottom of the ball valve. When the bottom cover is removed from the bottom cover mounting seat, the installation of the ball 100 and related maintenance and inspection can be facilitated, especially due to the presence of the protruding ridges 221 on the valve stem 200.

[0059] Reference Figures 7 to 8 In one embodiment, the inner wall of the valve stem mounting seat 011 is provided with a fixing ring 012, and the fixing ring 012 is axially provided with a frusto-conical transition channel 110 with a flared near inner end, and the stem body 210 matches the transition channel 110 in a matching frusto-conical shape, wherein the corresponding position of the first sealing ring 300 is at the transition channel 110.

[0060] In this embodiment, the protruding ring 220 on the valve stem 200 is correspondingly restricted by the fixing ring 012. Since the purpose of the setting of the first sealing ring 300 is to form a sealing effect with the valve stem mounting seat 011, the transition channel 110 in the middle of the fixing ring 012 is shaped, specifically, in a frustum shape. The corresponding position on the corresponding stem body 210 is also set to a matching frustum-shaped segment, and the first sealing ring 300 is set on the frustum-shaped segment. At this time, the cooperation between the two frustum-shaped structures enables the first sealing ring 300 to provide a better sealing effect.

[0061] Reference Fig. 9 In one embodiment, the valve body 001 and the two valve covers 002 are connected by a plurality of bolt assemblies.

[0062] In this embodiment, a common main body structure of a ball valve is provided, which has the advantages of being simple and reliable. In a specific implementation, the number of bolt assemblies is four, and the screw in the bolt assembly passes through a valve cover 002, a valve body 001 and another valve cover 002, and then forms a connection with a nut in the bolt assembly.

[0063] In summary, in the ball positioning structure and ball valve provided by the utility model, the free end of the connecting head 230 on the rod body 210 away from the protruding table ring 220 is in an arc shape in the length direction of the connecting head 230, thereby realizing convenient alignment with the fixing groove 121. When the connecting head 230 is matched with the fixing groove 121, the inner end of the protruding table ring 220 in the thickness direction is matched with the platform 120. At this time, the axial connection stability between the ball 100 and the valve stem 200 is improved, and the protruding rib 221 is paired with the auxiliary limiting groove 122, so that the ball 100 and the valve stem 200 form a stable limiting connection in the circumferential direction; the first sealing ring 300 realizes sealing in the length direction of the rod body 210, and the second sealing ring 400 forms a radial sealing effect.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A ball positioning structure, characterized in that: include: A sphere (100) having a channel (110) running through the middle thereof, a platform (120) being arranged on the top of the sphere (100), a fixing groove (121) running through the plane being provided on the platform (120), and an auxiliary limiting groove (122) being cross-connected with the fixing groove (121) on the platform (120); The valve stem (200) comprises a stem body (210), wherein the outer wall of the middle part of the length direction of the stem body (210) is provided with a protruding bezel (220), the inner end of the length direction of the stem body (210) is a connecting head (230), the connecting head (230) is in the shape of a plate, the free end of the connecting head (230) away from the protruding bezel (220) is in the shape of an arc in the length direction of the connecting head (230), and the inner end of the protruding bezel (220) in the thickness direction is provided with a protruding rib (221) corresponding to the auxiliary limiting groove (122), and the height of the protruding rib (221) is less than the minimum height of the connecting head (230); A first sealing ring (300) is arranged on the outer peripheral wall of the rod body (210) and is located above the protruding table ring (220); A second sealing ring (400) is disposed corresponding to the upper surface of the protruding table ring (220); When the connecting head (230) is matched with the fixing groove (121), the inner end of the protruding bezel (220) in the thickness direction is matched with the platform (120).

2. The ball positioning structure according to claim 1, characterized in that: The auxiliary limiting groove (122) and the fixing groove (121) form an angle of 45 to 135 degrees.

3. The ball positioning structure according to claim 2, characterized in that: The other end of the auxiliary limiting groove (122) in the length direction extends outside the platform (120).

4. The ball positioning structure according to claim 2, characterized in that: The protruding ribs (221) extend to the rod body (210).

5. The ball positioning structure according to any one of claims 1 to 4, characterized in that: The thickness of the protruding ribs (221) is 2 to 5 mm.

6. The ball positioning structure according to any one of claims 1 to 4, characterized in that: The valve stem (200) is a connection structure at the inner end side of the protruding table ring (220).

7. A ball valve, characterized in that: It comprises a valve body (001), two valve covers (002), two valve seats (003) and a ball positioning structure as described in any one of claims 1 to 6, wherein the two valve covers (002) are connected to the two end openings of the valve body (001), the valve seat (003) is clamped between the valve body (001) and the valve seat (003), and the valve seat (003) forms a seal with the ball (100).

8. The ball valve according to claim 7, characterized in that: A valve stem mounting seat (011) and a bottom cover mounting seat are arranged on the outer wall of the valve body (001) in opposition to each other. The valve stem (200) passes through the valve stem mounting seat (011) to form a connection with the ball (100) in the valve body (001), and a bottom cover is detachably connected to the bottom cover mounting seat.

9. The ball valve according to claim 8, characterized in that: The inner wall of the valve stem mounting seat (011) is provided with a fixing ring (012), and the fixing ring (012) is axially provided with a transition channel (110) with a flared frustum near the inner end, and the stem body (210) matches the transition channel (110) in a matching frustum, wherein the corresponding position of the first sealing ring (300) is at the transition channel (110).

10. The ball valve according to any one of claims 7 to 9, characterized in that: The valve body (001) and the two valve covers (002) are connected via a plurality of bolt assemblies.

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