Ball valve with mechanical limiting structure

Abstract

The utility model provides a ball valve with a mechanical limit structure, which relates to the technical field of valve related equipment and comprises a valve body mechanism, a ball core, a valve shaft and a limit mechanism. One end of the valve shaft is connected with the ball core, and the other end is connected with the limiting mechanism; the limiting mechanism comprises a connecting sleeve and an adjusting piece, the connecting sleeve is connected with the valve shaft, and the adjusting piece is connected with the connecting sleeve in a limiting mode so that the valve shaft can be limited. The ball valve solves the technical problem that in the prior art, it cannot be guaranteed that the ball valve can still be normally controlled after not acting for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of valve-related equipment, in particular to a ball valve with a mechanical limiting structure. Background Art

[0002] As a common valve type, the existing O-type ball valve is widely used in the fields of petroleum, chemical industry, electric power, water treatment, etc.

[0003] During the operation of a traditional ball valve, the control system is used to control the opening and closing of the valve. In some special working conditions, the ball valve may not be closed for a long time, that is, the valve remains in the open position. If this state lasts for too long, the valve may rust and cannot be closed. Therefore, a ball valve system with a mechanical limit is designed to effectively control the valve action angle when the ball valve does not move for a long time. This limit device has important practical value.

[0004] Existing O-type ball valves are generally controlled by a control system, and they only have two states: fully open or fully closed. However, special working conditions do not allow the ball valve to be completely closed in production. Existing ball valves cannot ensure that the valve can be normally controlled after a long period of inactivity, and therefore cannot meet corresponding usage requirements. Utility Model Content

[0005] The utility model aims to provide a ball valve with a mechanical limit structure to solve the technical problem that the ball valve in the prior art cannot ensure that the valve can be normally controlled after a long period of inactivity.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a ball valve with a mechanical limit structure, comprising a valve body mechanism, a ball core, a valve shaft and a limit mechanism, wherein the ball core is arranged in the valve body mechanism;

[0008] One end of the valve shaft is connected to the ball core, and the other end is connected to the limiting mechanism;

[0009] The limiting mechanism includes a connecting sleeve and an adjusting member, the connecting sleeve is connected to the valve shaft, and the adjusting member is connected to the connecting sleeve in a limiting manner to limit the valve shaft.

[0010] Furthermore, the connecting sleeve is provided with a limiting groove;

[0011] The adjusting member is plugged into the limiting groove to limit the connection sleeve.

[0012] Furthermore, the valve body mechanism comprises a ball valve body and a valve seat connected to the inner wall of the ball valve body;

[0013] The ball valve body is connected to the limiting mechanism, and the ball core is disposed inside the ball valve body, and the ball core matches the valve seat.

[0014] Furthermore, the valve body mechanism also includes a bottom shaft cover, which is connected to the ball valve body and is used to support the bottom of the ball core.

[0015] Furthermore, the limiting mechanism also includes a bracket and a support member, the bracket is connected to the ball valve body through the support member, and the bracket is connected to the adjusting member.

[0016] Further, the adjusting member includes an adjusting bolt and an inserting portion connected to the adjusting bolt;

[0017] The adjusting bolt is threadedly connected to the bracket, and the adjusting bolt moves relative to the bracket so that the inserting portion is inserted into the limiting groove.

[0018] Furthermore, a transmission key is provided at one end of the valve shaft, and the transmission key is connected to the connecting sleeve.

[0019] Furthermore, a transmission shaft surface is provided at the other end of the valve shaft, and the transmission shaft surface is connected to the ball core.

[0020] Furthermore, the ball valve with a mechanical limit structure also includes a packing mechanism, which is connected to the ball valve body and is coated on the outer wall of the valve shaft to seal the gap between the valve shaft and the ball valve body.

[0021] Further, the packing mechanism comprises a packing box, a packing piece, a packing pressure plate and a fastening bolt, the packing box is connected to the ball valve body, and the packing box is arranged around the outside of the valve shaft;

[0022] The packing member is filled between the packing box and the valve shaft;

[0023] The packing pressure plate is connected to the packing box through the fastening bolts, and the packing pressure plate is pressed tightly against the top of the packing piece.

[0024] The utility model can achieve the following beneficial effects:

[0025] In the first aspect, the utility model provides a ball valve with a mechanical limiting structure, including a valve body mechanism, a ball core, a valve shaft and a limiting mechanism, wherein the valve body mechanism is provided with a ball core; one end of the valve shaft is connected to the ball core, and the other end is connected to the limiting mechanism; the limiting mechanism includes a connecting sleeve and an adjusting member, the connecting sleeve is connected to the valve shaft, and the adjusting member is limitedly connected to the connecting sleeve to achieve limiting of the valve shaft.

[0026] In the utility model, a ball core is provided in the valve body mechanism, and the top of the ball core is connected to the limiting mechanism through the valve shaft; the limiting mechanism includes a connecting sleeve and an adjusting member connected to the valve shaft, and the adjusting member can have a connected state and a non-connected state with the connecting sleeve, and when the adjusting member and the connecting sleeve are in a connected state, the adjusting member is used to limit the connecting sleeve.

[0027] Compared with the prior art, the ball valve with a mechanical limit structure provided by the utility model connects one end of the valve shaft to the ball core and the other end to the limit mechanism, and limits the connecting sleeve through the adjusting part of the limit mechanism to limit the ball core through the valve shaft. At this time, the ball valve can only rotate within a certain angle, thereby ensuring that the valve can be normally controlled after a long period of no action.

[0028] In summary, the utility model at least alleviates the technical problem in the prior art that the ball valve cannot ensure that the valve can be normally controlled after a long period of inactivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the overall structure of a ball valve with a mechanical limit structure provided in an embodiment of the utility model;

[0031] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0032] Figure 3 A structural diagram of a ball valve with a mechanical limit structure provided in an embodiment of the utility model, in which the mechanical limit part is in an open state;

[0033] Figure 4 A structural diagram of a ball valve with a mechanical limit structure provided in an embodiment of the utility model, in which the mechanical limit part is in a closed state;

[0034] Figure 5 A schematic structural diagram of an adjusting member with a mechanical limiting structure provided in an embodiment of the utility model.

[0035] Icons: 1-valve body mechanism; 11-ball valve body; 12-bottom shaft cover; 13-valve seat; 2-ball core; 3-valve shaft; 31-transmission key; 32-transmission shaft surface; 4-packing mechanism; 41-packing box; 42-packing piece; 43-packing pressure plate; 44-fastening bolt; 5-limiting mechanism; 51-bracket; 52-connecting sleeve; 521-limiting groove; 53-adjusting piece; 531-adjusting bolt; 532-insertion part; 54-support piece; 6-actuator. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Embodiment 1

[0044] This embodiment provides a ball valve with a mechanical limit structure. Figure 1 The ball valve with a mechanical limit structure includes a valve body mechanism 1, a ball core 2, a valve shaft 3 and a limit mechanism 5; the valve body mechanism 1 is provided with a ball core 2; one end of the valve shaft 3 is connected to the ball core 2, and the other end is connected to the limit mechanism 5; the limit mechanism 5 includes a connecting sleeve 52 and an adjusting member 53, the connecting sleeve 52 is connected to the valve shaft 3, and the adjusting member 53 is limit-connected to the connecting sleeve 52, so as to limit the valve shaft 3.

[0045] The embodiments of the utility model at least alleviate the technical problem in the prior art that the ball valve cannot ensure that the valve can be normally controlled after a long period of inactivity.

[0046] In the embodiment of the utility model, a ball core 2 is provided in the valve body mechanism 1, and the top of the ball core 2 is connected to the limiting mechanism 5 through the valve shaft 3; and the limiting mechanism 5 includes a connecting sleeve 52 and an adjusting member 53 connected to the valve shaft 3, and the adjusting member 53 can have a connected state and a non-connected state with the connecting sleeve 52, and when the adjusting member 53 and the connecting sleeve 52 are in a connected state, the adjusting member 53 is used to limit the connecting sleeve 52.

[0047] Compared with the prior art, the ball valve with a mechanical limiting structure provided in the embodiment of the utility model connects one end of the valve shaft 3 to the ball core 2 and the other end to the limiting mechanism 5, and limits the connecting sleeve 52 through the adjusting member 53 of the limiting mechanism 5, so as to limit the ball core 2 through the valve shaft 3. At this time, the ball valve can only rotate within a certain angle, thereby ensuring that the ball valve can be normally controlled after a long period of no action.

[0048] In an optional implementation manner of this embodiment, refer to Figure 3 or Figure 4 The connecting sleeve 52 is provided with a limiting groove 521 ; the adjusting member 53 is plugged into the limiting groove 521 to limit the connecting sleeve 52 .

[0049] Specifically: a limiting groove 521 is provided on the connecting sleeve 52, and the connecting sleeve 52 is preferably a cylindrical structure, and the opening range of the limiting groove 521 is an angle of 20°, and the adjusting member 53 is inserted into the limiting groove 521 to limit the connecting sleeve 52, so that the ball valve can only rotate within 20°, thereby realizing the ball valve to ensure that the valve can be normally controlled after a long period of inactivity.

[0050] Further, refer to Figure 1 or Figure 2 The valve body mechanism 1 includes a ball valve body 11 and a valve seat 13 connected to the inner wall of the ball valve body 11 ; the ball valve body 11 is connected to the limiting mechanism 5 , and a ball core 2 is disposed in the ball valve body 11 , and the ball core 2 matches the valve seat 13 .

[0051] Specifically, a cavity for accommodating the ball core 2 is provided in the ball valve body 11 , and a valve seat 13 is provided in the cavity. The valve seat 13 is used to cooperate with the ball core 2 so that the ball core 2 and the ball valve body 11 are more closely fitted.

[0052] Further, refer to Figure 1 or Figure 2 The valve body mechanism 1 also includes a bottom shaft cover 12 , which is connected to the ball valve body 11 and is used to be supported on the bottom of the ball core 2 .

[0053] Specifically: the bottom shaft cover 12 is connected to the ball valve body 11, and the connection method can be a detachable connection through bolts. The bottom shaft cover 12 is used to support the bottom of the ball core 2. When the bottom shaft cover 12 is removed from the ball valve body 11, the ball core 2 can be removed from the ball valve body 11.

[0054] In an optional implementation manner of this embodiment, refer to Figure 2 The limiting mechanism 5 further includes a bracket 51 and a support member 54 . The bracket 51 is connected to the ball valve body 11 through the support member 54 , and the bracket 51 is connected to the adjusting member 53 .

[0055] Specifically: the bottom of the support member 54 is connected to the top of the ball valve body 11, and the top of the support member 54 is connected to the bracket 51. The bracket 51 is preferably a rectangular frame structure, and the adjusting member 53 is movably connected to the side wall of the bracket 51, that is, the adjusting member 53 is moved relative to the bracket 51 to insert its end into the limiting groove 521 of the connecting sleeve 52.

[0056] Further, refer to Figure 5 The adjusting member 53 includes an adjusting bolt 531 and an inserting portion 532 connected to the adjusting bolt 531 ; the adjusting bolt 531 is threadedly connected to the bracket 51 , and the adjusting bolt 531 moves relative to the bracket 51 so that the inserting portion 532 is inserted into the limiting groove 521 .

[0057] Specifically: a nut is provided at one end of the adjusting bolt 531, and an insertion portion 532 is provided at the other end. When in use, the adjusting bolt 531 is threadedly connected to the side wall of the bracket 51, and preferably, the adjusting bolt 531 is distributed horizontally, and the insertion portion 532 is inserted into the limiting groove 521 for limiting by rotating the adjusting bolt 531.

[0058] Preferably, a limit block is provided on the bracket 51, and a threaded hole is formed in the limit block, and the adjusting bolt 531 is also threadedly connected to the threaded hole of the limit block.

[0059] In an optional implementation manner of this embodiment, refer to Figure 2 A transmission key 31 is provided at one end of the valve shaft 3 , and the transmission key 31 is connected to the connecting sleeve 52 .

[0060] Specifically, one end of the valve shaft 3 is connected to the connecting sleeve 52 , and a transmission key 31 is provided between the two to match the valve shaft 3 with the connecting sleeve 52 .

[0061] Further, refer to Figure 2 The other end of the valve shaft 3 is provided with a transmission shaft surface 32 , and the transmission shaft surface 32 is connected to the ball core 2 .

[0062] Specifically: the other end of the valve shaft 3 is provided with a transmission shaft surface 32, and the transmission shaft surface 32 is connected to the ball core 2; when in use, the valve shaft 3 is used to drive the ball core 2 to move synchronously.

[0063] In an optional implementation manner of this embodiment, refer to Figure 1 or Figure 2 The ball valve with a mechanical limit structure also includes a packing mechanism 4 , which is connected to the ball valve body 11 and is covered on the outer wall of the valve shaft 3 to seal the gap between the valve shaft 3 and the ball valve body 11 .

[0064] Specifically, the packing mechanism 4 is connected to the ball valve body 11 , and the packing mechanism 4 is covered on the outer wall of the valve shaft 3 to seal the gap between the valve shaft 3 and the ball valve body 11 , and the packing mechanism 4 is located below the bracket 51 .

[0065] Furthermore, the packing mechanism 4 includes a stuffing box 41, a stuffing piece 42, a stuffing pressure plate 43 and a fastening bolt 44. The stuffing box 41 is connected to the ball valve body 11, and the stuffing box 41 is arranged around the outside of the valve shaft 3; the stuffing piece 42 is filled between the stuffing box 41 and the valve shaft 3; the stuffing pressure plate 43 is connected to the stuffing box 41 by the fastening bolt 44, and the stuffing pressure plate 43 is pressed against the top of the stuffing piece 42.

[0066] Specifically: the stuffing box 41 is arranged outside the outer wall of the valve shaft 3, and there is a gap between the stuffing box 41 and the valve shaft 3, and the gap is filled with a stuffing piece 42. The stuffing piece 42 is circumferentially arranged on the outside of the valve shaft 3, and the stuffing pressure plate 43 is pressed on the top of the stuffing piece 42 to tightly fill the stuffing piece 42 in the gap between the stuffing box 41 and the valve shaft 3.

[0067] Reference Figure 1 , and also includes an actuator 6, which is connected to the top of the bracket 51.

[0068] When using, refer to Figure 3 In this state, the ball valve is in a normal switch state, and the insertion portion 532 at the end of the adjusting bolt 531 does not enter the limiting groove 521, so the limiting function does not work.

[0069] And refer to Figure 4 At this time, the insertion portion 532 of the adjusting bolt 531 has entered the limit groove 521. The limit groove 521 is designed to be at an angle of 20 degrees to ensure that the rotation angle can be controlled when the ball valve is switched. At this time, the ball valve core 2 can only rotate within 20 degrees. Therefore, it will not affect the flow rate of the valve in the normal open state.

[0070] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A ball valve with a mechanical limit structure, characterized in that: It comprises a valve body mechanism (1), a ball core (2), a valve shaft (3) and a limit mechanism (5), wherein the ball core (2) is arranged in the valve body mechanism (1); One end of the valve shaft (3) is connected to the ball core (2), and the other end is connected to the limiting mechanism (5); The limiting mechanism (5) comprises a connecting sleeve (52) and an adjusting member (53); the connecting sleeve (52) is connected to the valve shaft (3), and the adjusting member (53) is connected to the connecting sleeve (52) in a limiting manner, so as to limit the position of the valve shaft (3).

2. The ball valve with a mechanical limit structure according to claim 1, characterized in that: The connecting sleeve (52) is provided with a limiting groove (521); The adjusting member (53) is plugged into the limiting groove (521) to limit the position of the connecting sleeve (52).

3. The ball valve with a mechanical limit structure according to claim 2, characterized in that: The valve body mechanism (1) comprises a ball valve body (11) and a valve seat (13) connected to the inner wall of the ball valve body (11); The ball valve body (11) is connected to the limiting mechanism (5), and the ball core (2) is disposed inside the ball valve body (11), and the ball core (2) matches the valve seat (13).

4. The ball valve with a mechanical limit structure according to claim 3, characterized in that: The valve body mechanism (1) further comprises a bottom shaft cover (12), wherein the bottom shaft cover (12) is connected to the ball valve body (11), and the bottom shaft cover (12) is used to support the bottom of the ball core (2).

5. The ball valve with a mechanical limit structure according to claim 3, characterized in that: The limiting mechanism (5) further comprises a bracket (51) and a support member (54); the bracket (51) is connected to the ball valve body (11) via the support member (54); and the bracket (51) is connected to the adjusting member (53).

6. The ball valve with a mechanical limit structure according to claim 5, characterized in that: The adjusting member (53) comprises an adjusting bolt (531) and an inserting portion (532) connected to the adjusting bolt (531); The adjusting bolt (531) is threadedly connected to the bracket (51), and the adjusting bolt (531) moves relative to the bracket (51) so that the insertion portion (532) is inserted into the limiting groove (521).

7. The ball valve with a mechanical limit structure according to claim 2, characterized in that: A transmission key (31) is provided at one end of the valve shaft (3), and the transmission key (31) is connected to the connecting sleeve (52).

8. The ball valve with a mechanical limit structure according to claim 7, characterized in that: The other end of the valve shaft (3) is provided with a transmission shaft surface (32), and the transmission shaft surface (32) is connected to the ball core (2).

9. The ball valve with a mechanical limit structure according to claim 3, characterized in that: It also comprises a packing mechanism (4), which is connected to the ball valve body (11), and the packing mechanism (4) is coated on the outer wall of the valve shaft (3) to seal the gap between the valve shaft (3) and the ball valve body (11).

10. The ball valve with a mechanical limit structure according to claim 9, characterized in that: The packing mechanism (4) comprises a packing box (41), a packing piece (42), a packing pressure plate (43) and a fastening bolt (44); the packing box (41) is connected to the ball valve body (11), and the packing box (41) is arranged around the outside of the valve shaft (3); The stuffing member (42) is filled between the stuffing box (41) and the valve shaft (3); The packing pressure plate (43) is connected to the packing box (41) via the fastening bolts (44), and the packing pressure plate (43) is pressed tightly against the top of the packing member (42).

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