Quick-closing gate valve capable of automatically adjusting and exchanging valve clacks

Abstract

The utility model discloses a quick-closing gate valve capable of automatically adjusting and exchanging valve clacks, and relates to the technical field of gate valves. Comprising a valve body, the outer wall of the top of the valve body is fixedly connected with a valve seat, the outer wall of the top of the valve seat is fixedly connected with a direct current motor, the output end of the direct current motor is fixedly connected with a driving bevel gear, and the outer wall of the top of the valve seat is rotatably connected with a driven bevel gear; the outer wall of the bottom of the valve rod is rotationally connected with a flow choking structure, axial force of the valve rod is converted into radial expansion force of the gate plate through transmission of inclined faces of a pushing groove and a guiding groove, in the flow choking structure, pre-tightening force from inside to outside is formed when the valve is to be closed through a pre-compressed compression spring and a two-way damping rod, sealing pressure is dynamically adjusted, and the sealing effect is improved. Compared with a traditional gate valve, sealing performance and opening-closing stability are improved, and fluid leakage is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gate valve, concretely is a quick closing gate valve of self -adjusting interchangeable valve clack. BACKGROUND

[0002] In the industrial field such as petroleum, chemical industry, in the high pressure, high corrosive fluid conveying process, the sealing performance of gate valve influences system safe operation, the traditional quick closing gate valve adopts rigid valve clack structure, realizes sealing through the direct depression of valve stem, this mode has the defect: on one hand, only rely on axial pressure to adhere between valve clack and valve seat, it is difficult to adapt to fluid pressure fluctuation, when the pressure in the pipeline suddenly changes, the valve clack is easy to appear displacement and lead to sealing failure, and cause medium leakage, on the other hand, rigid contact makes the valve clack and valve seat wear seriously, under high frequency opening and closing condition, the sealing surface is easy to produce scratch, deformation, thereby shortening the service life of valve. SUMMARY

[0003] (I) technical problem solved

[0004] In view of the deficiency of prior art, the utility model provides a quick closing gate valve of self -adjusting interchangeable valve clack, realizes dynamic sealing through inclined plane transmission and elastic pre -tightening structure, combines with the design of guiding limit and modularization, improves the reliability and maintenance efficiency of valve under complex working condition.

[0005] (II) technical scheme

[0006] In order to realize the above object, the utility model is realized through the following technical scheme: a quick closing gate valve of self -adjusting interchangeable valve clack, including valve body, the outer wall fixedly connected with valve seat at the top of valve body, the outer wall fixedly connected with DC motor at the top of valve seat, the output end fixedly connected with driving bevel gear of DC motor, the outer wall rotatably connected with driven bevel gear at the top of valve seat, the side wall screw connection has valve stem in driven bevel gear, the outer wall rotatably connected with resistance structure at the bottom of valve stem;Resistance structure includes connecting frame, the outer wall of connecting frame is fixedly connected with gate by bolt symmetry, the outer wall of gate is provided with guide groove, the side wall of gate is fixedly connected with limit block symmetry, the outer wall of gate is fixedly connected with bidirectional damping rod, the outer part of bidirectional damping rod is equipped with compression spring, through the inclined plane transmission of push groove and guide groove, the axial force of valve stem is converted into the radial expansion force of gate, cooperate with the pre -compression of compression spring and bidirectional damping rod, form the pre -tightening force from inside to outside when the quick closing of valve, dynamically adjust sealing pressure.

[0007] Preferably, the inner wall of connecting frame is rotatably connected with the outer wall at the bottom of valve stem, the driving bevel gear is engaged with driven bevel gear, and the outer wall of a pair of gate is fixedly connected with the two ends of compression spring respectively.

[0008] Preferably, the inner wall of the valve body is provided with a limiting groove, the bottom end of the valve body is fixedly connected with a partition plate, the side wall of the partition plate is symmetrically fixedly connected with a fixed block, and the outer wall of the top of the fixed block is provided with a pushing groove.

[0009] Preferably, the inner wall of the valve body is slidably connected with the outer wall of the limiting block through the limiting groove, the outer wall of the partition plate is slidably connected with the outer wall of the gate plate, and the outer wall of the fixed block is in contact with the outer wall of the gate plate through the pushing groove and the guide groove.

[0010] (Three) beneficial effects

[0011] The utility model provides a fast -closing gate valve of self -adjusting interchangeable valve clack. Have the following beneficial effects:

[0012] (I), the gate valve, through the slope transmission of pushing groove and guide groove, converts the axial force of valve stem into the radial expansion force of gate plate, cooperates the pre -compressed compression spring and bidirectional damping rod, forms the pre -tightening force from inside to outside when the valve fast -closing, dynamically adjusts the sealing pressure, compared with traditional gate valve improves sealing performance and opening and closing stability, effectively prevents fluid leakage.

[0013] (Two), the gate valve, through the sliding guide design of limiting block and limiting groove, ensures that the gate plate is stable during fast -closing, is difficult to shake, thereby reducing the sealing surface wear, and the gate plate adopts bolt connection, is convenient for quick dismounting replacement, adapts to different medium and pressure scene, reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the utility model;

[0015] Figure 2 It is the internal structure schematic view of the utility model whole;

[0016] Figure 3 It is the local structure schematic view of the valve body of the utility model;

[0017] Figure 4 It is the structure schematic view of the flow resistance structure of the utility model.

[0018] In the drawing: 1, valve body;2, valve seat;3, DC motor;4, driving bevel gear;5, driven bevel gear;6, valve stem;7, flow resistance structure;11, limiting groove;12, partition plate;13, fixed block;14, pushing groove;71, connecting frame;72, gate plate;73, guide groove;74, limiting block;75, bidirectional damping rod;76, compression spring. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0020] Please refer to Figures 1-4 The utility model provides a technical scheme: a quick closing gate valve of self -adjusting interchangeable valve disc, including valve body 1, the outer wall fixed connection has valve seat 2 on valve body 1 top, the outer wall fixed connection has DC motor 3 on valve seat 2 top, the output fixed connection has driving bevel gear 4 of DC motor 3, the outer wall rotatory connection has driven bevel gear 5 on valve seat 2 top, the side wall screw thread connection has valve stem 6 in driven bevel gear 5 inside, the outer wall rotatory connection has resistance flow structure 7 on valve stem 6 bottom, DC motor 3 is driven driven bevel gear 5 rotation through the driving bevel gear 4 of output after starting, the screw thread of driven bevel gear 5 inner wall cooperates with valve stem 6, drives valve stem 6 and moves along the axial up and down;

[0021] Resistance flow structure 7 includes connecting frame 71, the outer wall of connecting frame 71 is fixedly connected with gate 72 by bolt symmetry, the outer wall of gate 72 is provided with guide slot 73, the side wall of gate 72 is fixedly connected with limit block 74 symmetry, the outer wall of gate 72 is fixedly connected with two-way damping rod 75, the outer portion of two-way damping rod 75 is provided with compression spring 76, when closing the valve, valve stem 6 moves downward, gate 72 drops with connecting frame 71 and contacts with partition plate 12, at this moment, the inclined surface cooperation of the push groove 14 in the top of fixed block 13 and the guide slot 73 of gate 72 is formed, along with the continuous pressing of gate 72, the inclined surface of push groove 14 forces gate 72 to expand outward along limit slot 11, the compression spring 76 between the gate 72 of a pair of gate 72 is compressed before the installation of gate 72, and is installed between the two gates 72, two-way damping rod 75 provides damping force synchronously, forms the pre-tightening force from inside to outside.

[0022] The inner wall of connecting frame 71 is rotatory connected with the outer wall of valve stem 6 bottom, driving bevel gear 4 is engaged with driven bevel gear 5, the outer wall of a pair of gate 72 is fixedly connected with the both ends of compression spring 76 respectively.

[0023] The inner wall of the valve body 1 is provided with a limiting groove 11, the bottom end of the valve body 1 is fixedly connected with a partition plate 12, the side wall of the partition plate 12 is symmetrically fixedly connected with a fixed block 13, the outer wall of the top of the fixed block 13 is provided with a pushing groove 14, when the gate plate 72 completely abuts against the partition plate 12, the elastic potential energy of the compression spring 76 and the damping force of the bidirectional damping rod 75 jointly act, so that the gate plate 72 is tightly pressed on the internal passage of the valve body 1 and the partition plate 12, and meanwhile the triangular supporting structure of the pushing groove 14 and the guide groove 73 enhances the sealing stability, and effectively prevents fluid leakage.

[0024] The inner wall of the valve body 1 is slidably connected with the outer wall of the limiting block 74 through the limiting groove 11, the outer wall of the partition plate 12 is slidably connected with the outer wall of the gate plate 72, the outer wall of the fixed block 13 is in contact with the outer wall of the gate plate 72 through the pushing groove 14 and the guide groove 73, the sliding guide design of the limiting block 74 and the limiting groove 11 ensures that the gate plate 72 is difficult to shake radially in the fast closing process, and the slope guide of the pushing groove 14 makes the sealing force uniformly distributed, and the bidirectional damping rod 75 not only provides the initial pre-tightening force under the assistance of the compression spring 76, but also dynamically adjusts the sealing pressure when the fluid pressure fluctuates.

[0025] In use, when the fast closing gate valve works, the direct current motor 3 is started, the driving bevel gear 4 of the output end drives the driven bevel gear 5 to rotate, the threads in the inner wall of the driven bevel gear 5 cooperate with the valve rod 6, and drive the valve rod 6 to move up and down along the axial direction, when the valve needs to be opened, the valve rod 6 rises, drives the gate plate 72 to move up synchronously through the connecting frame 71, the limiting block 74 of the outer wall of the gate plate 72 slides along the limiting groove 11 in the inner wall of the valve body 1, so as to ensure that the gate plate 72 does not deviate in vertical movement, until the gate plate 72 completely separates from the partition plate 12, and the fluid can flow through the internal passage of the valve body 1;

[0026] When the valve is closed, the valve rod 6 moves downward, the gate plate 72 descends with the connecting frame 71 to contact the partition plate 12, at this time, the pushing groove 14 at the top of the fixed block 13 is in slope cooperation with the guide groove 73 of the gate plate 72, as the gate plate 72 continues to press down, the slope of the pushing groove 14 forces the gate plate 72 to expand outward along the limiting groove 11, the compression spring 76 between the pair of gate plates 72 is compressed before the gate plate 72 is installed, and is installed between the two gate plates 72, the bidirectional damping rod 75 synchronously provides the damping force, and forms the pre-tightening force from inside to outside, when the gate plate 72 completely abuts against the partition plate 12, the elastic potential energy of the compression spring 76 and the damping force of the bidirectional damping rod 75 jointly act, so that the gate plate 72 is tightly pressed on the internal passage of the valve body 1 and the partition plate 12, and meanwhile the triangular supporting structure of the pushing groove 14 and the guide groove 73 enhances the sealing stability, and effectively prevents fluid leakage;

[0027] The gate plate 72 is fixed on the connecting frame 71 by bolts, when it is necessary to replace, the bolts can be quickly disassembled to realize the exchange of valve clack, adapt to different medium or pressure scene, the sliding guide design of the limiting block 74 and the limiting groove 11 ensures that the gate plate 72 is difficult to shake radially in the quick closing process, cooperates with the slope guide of the pushing groove 14, makes the sealing force uniformly distributed, the bidirectional damping rod 75 not only provides the initial pre-tightening force under the assistance of the compression spring 76, but also can dynamically adjust the sealing pressure when the fluid pressure fluctuates, improves the reliability of the valve in the high pressure or high frequency opening and closing scene;

[0028] The valve converts the axial force of the valve stem 6 into the radial expansion force of the gate plate 72 through the slope transmission of the pushing groove 14 and the guide groove 73, realizes the self-adjusting sealing in quick closing by combining the pre-tightening structure of the compression spring 76 and the bidirectional damping rod 75, compared with the traditional gate valve, the sealing performance and opening and closing stability are improved; The limiting guide and the triangular support design reduce the shaking of the gate plate 72, reduce the wear of the sealing surface, prolong the service life of the valve; The modular valve clack structure is convenient to replace and maintain, and is suitable for fluid control scenes such as petroleum, chemical industry and the like with high sealing reliability requirements.

[0029] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article or equipment including the element.

[0030] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A quick-closing gate valve with self-adjusting and interchangeable valve discs, comprising a valve body (1), wherein a valve seat (2) is fixedly connected to the outer wall of the top of the valve body (1), characterized in that: A DC motor (3) is fixedly connected to the outer wall of the top of the valve seat (2). A driving bevel gear (4) is fixedly connected to the output end of the DC motor (3). A driven bevel gear (5) is rotatably connected to the outer wall of the top of the valve seat (2). A valve stem (6) is threadedly connected to the side wall inside the driven bevel gear (5). A flow-blocking structure (7) is rotatably connected to the outer wall of the bottom of the valve stem (6). The flow-blocking structure (7) includes a connecting frame (71), and a gate plate (72) is symmetrically fixed to the outer wall of the connecting frame (71) by bolts. A guide groove (73) is provided on the outer wall of the gate plate (72). Limiting blocks (74) are symmetrically fixed to the side wall of the gate plate (72). A bidirectional damping rod (75) is fixedly connected to the outer wall of the gate plate (72), and a compression spring (76) is sleeved on the outside of the bidirectional damping rod (75).

2. The quick-closing gate valve with self-adjusting and interchangeable valve discs according to claim 1, characterized in that: The inner wall of the connecting frame (71) is rotatably connected to the outer wall of the bottom of the valve stem (6), and the driving bevel gear (4) meshes with the driven bevel gear (5).

3. A quick-closing gate valve with self-adjustable and interchangeable valve discs according to claim 1, characterized in that: The outer walls of the pair of gates (72) are respectively fixedly connected to the two ends of the compression spring (76).

4. A quick-closing gate valve with self-adjusting and interchangeable valve discs according to claim 1, characterized in that: The valve body (1) has a limiting groove (11) on its inner wall. A partition plate (12) is fixedly connected to the bottom of the valve body (1). A fixing block (13) is symmetrically fixedly connected to the side wall of the partition plate (12). A pushing groove (14) is provided on the outer wall of the top of the fixing block (13).

5. A quick-closing gate valve with self-adjusting and interchangeable valve discs according to claim 4, characterized in that: The inner wall of the valve body (1) is slidably connected to the outer wall of the limiting block (74) through the limiting groove (11), and the outer wall of the partition plate (12) is slidably connected to the outer wall of the gate plate (72).

6. A quick-closing gate valve with self-adjustable and interchangeable valve discs according to claim 4, characterized in that: The outer wall of the fixed block (13) contacts the outer wall of the gate (72) through the push groove (14) and the guide groove (73).

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