Lifting type plug valve

Abstract

The utility model relates to the technical field of plug valves, in particular to a lifting type plug valve which comprises a valve seat and a valve element arranged in the valve seat, a valve rod is connected to the upper portion of the valve seat in an inserted mode through a sealing piece, and a handle is fixed to one side of the valve rod. Wherein a fixing frame is further fixed above the valve seat, a hand wheel assembly is arranged on the fixing frame, and a connecting assembly is arranged in the fixing frame in a sliding mode. Through the designed connecting assembly, the interaction effect of the valve rod and the screw rod is optimized, the lifting function and the dismounting function are ingeniously integrated through the design of the assembly, and therefore the lifting function and the dismounting function are achieved. By means of the design, in the process that the valve seat is lifted by the screw, connection between the valve rod and the screw can be easily and rapidly separated, assembly and overhaul work is greatly facilitated, connection between the valve rod and the screw is more flexible and reliable, complex steps possibly occurring in the maintenance and replacement process are reduced, the structure is simplified, and the cost is reduced. Therefore, the production efficiency is obviously improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a lifting plug valve. Background Art

[0002] The lifting plug valve is a commonly used shut-off valve, which adopts an opening and closing mechanism different from that of the traditional plug valve. In the traditional plug valve, the rotation of the valve core opens or closes the channel, while in the lifting plug valve, the valve core moves up and down along the axial direction through the screw, and then the valve is opened and closed by turning the handle. For details, please refer to the lifting plug valve disclosed in the Chinese patent announcement number "CN106641312A", which includes a valve stem, a valve plug fixedly connected to the lower end of the valve stem, and the lifting plug valve also includes a lifting shaft, a shaft guide block, a handwheel, a handle, a valve stem mounting seat, a valve stem packing, a packing gland, and a leakage receiving chamber.

[0003] At present, a rotatable structure is generally used for the connection between the screw and the valve stem to achieve the axial connection between the two so as not to interfere with the rotation of the handle. However, the current connection structure has poor detachability, which makes it inconvenient to separate the screw and the valve stem during assembly and maintenance. Based on this, in order to further improve the convenience of using the existing plug valve, we propose a lifting plug valve. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art, such as poor detachability of the connection structure and inconvenient separation of the screw rod and the valve stem, and proposes a lifting plug valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A lifting plug valve is designed, comprising a valve seat and a valve core placed in the valve seat, a valve stem is inserted above the valve seat through a sealing member, and a handle is fixed on one side of the valve stem;

[0007] A fixing frame is fixed above the valve seat, a handwheel assembly is arranged on the fixing frame, a connecting assembly is slidably arranged inside the fixing frame, and the connecting assembly is used to realize a detachable connection between the valve stem and the handwheel assembly.

[0008] Furthermore, the handwheel assembly includes a screw rod threadedly connected to the middle part of the fixing frame, and a handwheel is fixed to the top end of the screw rod.

[0009] Furthermore, the connecting assembly includes a connecting seat, which is sleeved on the outer side of the screw, and an annular groove is opened on the inner side of the connecting seat, and a locking bead is slidably connected inside the annular groove, wherein a through hole is opened on the end face of the screw, and one end of the locking bead is inserted into the through hole.

[0010] Furthermore, a socket is provided at the bottom of the screw rod, and the top of the valve stem is inserted into the socket, wherein a ring groove matching the locking bead is circumferentially provided at the top of the valve stem.

[0011] Furthermore, the connecting seat includes a first clamping block and a second clamping block, the first clamping block and the second clamping block are connected by a fastener, and sliding wings that fit the fixing frame are fixedly installed on both sides of the second clamping block.

[0012] Furthermore, a limit bolt is threadedly connected to the inner side of the fixing frame, and the limit bolt is used to stop the connecting assembly from moving upward.

[0013] The utility model proposes a lifting plug valve, the beneficial effect of which is that the utility model aims to optimize the interaction between the valve stem and the screw through the designed connection component, the design of the component cleverly integrates the lifting and disassembly functions, so that in the process of the screw lifting the valve seat, the connection between the valve stem and the screw can be easily and quickly separated. This design not only greatly facilitates assembly and maintenance work, but also makes the connection between the valve stem and the screw more flexible and reliable, reduces the complicated steps that may occur during maintenance and replacement, and achieves structural simplification, thereby significantly improving production efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the hand wheel assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the locking bead structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the connecting seat structure of the utility model.

[0018] In the figure: 1. valve seat; 2. valve core; 3. sealing member; 4. valve stem; 41. ring groove; 5. handle; 6. fixing frame; 61. limit bolt; 7. handwheel assembly; 71. screw rod; 72. handwheel; 73. through hole; 74. socket; 8. connecting assembly; 81. connecting seat; 811. first clamping block; 812. second clamping block; 813. fastener; 814. sliding wing; 82. ring groove; 83. locking bead. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-4 This is an embodiment of the utility model, which discloses a lifting plug valve. Specifically, the rotary valve comprises a valve seat 1 and a valve core 2 placed in the valve seat 1. A valve stem 4 is inserted above the valve seat 1 through a sealing member 3. The sealing member 3 can be set as a packing. The specific design structure has been disclosed in the prior art and will not be described in detail here. A handle 5 is fixed to one side of the valve stem 4.

[0021] A fixing frame 6 is fixed above the valve seat 1 , a handwheel assembly 7 is arranged on the fixing frame 6 , a connecting assembly 8 is slidably arranged inside the fixing frame 6 , and the connecting assembly 8 is used to realize a detachable connection between the valve stem 4 and the handwheel assembly 7 .

[0022] In some embodiments, the handwheel assembly 7 in the utility model includes a screw rod 71 threadedly connected to the middle part of the fixing frame 6, and a handwheel 72 is fixed to the top end of the screw rod 71. When working, the handwheel 72 is rotated to drive the screw rod 71 to move up and down to achieve the lifting of the valve stem 4.

[0023] On the basis of the above-mentioned embodiments, the connecting assembly 8 in the utility model includes a connecting seat 81, which is sleeved on the outer side of the screw rod 71, and an annular groove 82 is provided on the inner side of the connecting seat 81, and a locking bead 83 is slidably connected inside the annular groove 82, wherein a through hole 73 is provided on the end face of the screw rod 71. Preferably, two through holes 73 are provided in the present embodiment to improve the connection stability of the valve stem 4, wherein one end of the locking bead 83 is inserted into the through hole 73. It should be noted that in the present embodiment, the diameter of the locking bead 83 is slightly larger than the diameter of the through hole 73. The purpose of this design is to ensure that one end of the locking bead 83 can extend into the screw rod 71 and cannot pass through the through hole 73, so as to avoid the locking bead 83 falling from the inside of the screw rod 71 when the valve stem 4 is disassembled.

[0024] Furthermore, in this embodiment, a socket 74 is provided at the bottom of the screw rod 71 , and the top of the valve stem 4 is inserted into the socket 74 , wherein a ring groove 41 adapted to the locking bead 83 is circumferentially provided at the top of the valve stem 4 .

[0025] That is to say, during the specific connection, the connecting seat 81 contacts the two locking beads 83 and moves inward along the through hole 73 on the screw 71. When in place, a part of the locking beads 83 is engaged in the annular groove 41, so that the valve stem 4 and the screw 71 can be relatively independently rotated without interfering with the operation of the handle 5. At the same time, when the height of the screw 71 is adjusted up and down, the valve stem 4 is driven to move upward, so that the valve core 2 moves upward and the sealing surface in close contact with the valve seat 1 is separated. Thereafter, the valve core 2 can be rotated to open or close by rotating the handle 5.

[0026] On the basis of the above embodiment, the connection seat 81 in the utility model includes a first clamping block 811 and a second clamping block 812, and the first clamping block 811 and the second clamping block 812 are connected by a fastener 813. Preferably, the fastener 813 in this embodiment is set as a bolt, and two bolts are arranged at intervals to complete the clamping and fixing of the first clamping block 811 and the second clamping block 812;

[0027] Sliding wings 814 that fit the fixing frame 6 are fixedly installed on both sides of the second clamping block 812. Of course, technical personnel in the relevant field know that sliding wings 814 can also be set on both sides of the first clamping block 811 to improve sliding stability. In this embodiment, the connecting seat 81 is designed to be a detachable connecting structure, so that the axial position connection between the valve stem 4 and the screw 71 can be achieved during connection to achieve a lifting operation function. When the connecting seat 81 is separated and opened, the locking bead 83 between the valve stem 4 and the screw 71 moves outward, and after being separated from the annular groove 41 on the valve stem 4, the valve stem 4 and the screw 71 are no longer axially connected. At this time, independent manual operation of the handle 5 can be achieved, the finishing structure is simple, and the separable structure can also improve the convenience of assembly and maintenance.

[0028] Of course, considering the limitation of the lifting height of the valve core 2, in the utility model, a limiting bolt 61 is threadedly connected to the inner side of the fixing frame 6, and the limiting bolt 61 is used to stop the connecting assembly 8 from moving upward.

[0029] In summary, the utility model aims to optimize the interaction between the valve stem 4 and the screw 71 through the designed connection component 8. The design of the component cleverly integrates the lifting and disassembly functions, so that when the screw 71 lifts the valve stem 4, the connection between the valve stem 4 and the screw 71 can be easily and quickly separated. This design not only greatly facilitates assembly and maintenance work, but also makes the connection between the valve stem 4 and the screw 71 more flexible and reliable, reduces the complicated steps that may occur during maintenance and replacement, and simplifies the structure, thereby significantly improving production efficiency and reducing costs.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lifting plug valve, comprising a valve seat (1) and a valve core (2) disposed in the valve seat (1), characterized in that: A valve stem (4) is inserted above the valve seat (1) via a sealing member (3), and a handle (5) is fixed on one side of the valve stem (4); A fixing frame (6) is fixed above the valve seat (1), a handwheel assembly (7) is arranged on the fixing frame (6), a connecting assembly (8) is slidably arranged inside the fixing frame (6), and the connecting assembly (8) is used to realize a detachable connection between the valve stem (4) and the handwheel assembly (7); The handwheel assembly (7) comprises a screw rod (71) threadedly connected to the middle part of the fixing frame (6), a handwheel (72) is fixed at the top end of the screw rod (71), and the connecting assembly (8) comprises a connecting seat (81), the connecting seat (81) is sleeved on the outer side of the screw rod (71), an annular groove (82) is provided on the inner side of the connecting seat (81), a locking bead (83) is slidably connected inside the annular groove (82), wherein a through hole (73) is provided on the end surface of the screw rod (71), and one end of the locking bead (83) is inserted into the through hole (73).

2. A lifting plug valve according to claim 1, characterized in that: The bottom of the screw rod (71) is provided with an insertion hole (74), and the top of the valve stem (4) is inserted into the insertion hole (74), wherein a ring groove (41) adapted to the locking bead (83) is circumferentially provided at the top of the valve stem (4).

3. A lifting plug valve according to claim 1, characterized in that: The connecting seat (81) comprises a first clamping block (811) and a second clamping block (812), wherein the first clamping block (811) and the second clamping block (812) are connected via a fastener (813), and sliding wings (814) that fit the fixing frame (6) are fixedly mounted on both sides of the second clamping block (812).

4. A lifting plug valve according to claim 1, characterized in that: A limiting bolt (61) is also threadedly connected to the inner side of the fixing frame (6), and the limiting bolt (61) is used to stop the connecting assembly (8) from moving upward.

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