Reversing gate valve

Abstract

According to the technical scheme, the reversing gate valve is characterized in that the reversing gate valve comprises a valve body, a valve rod and a valve element, the valve rod is connected with the valve element and used for driving the valve element to block the input end and the output end of the valve body, the lower end of the valve rod is rotationally connected with an installation base, the valve element is connected to the installation base, and the installation base extends upwards to be provided with a driving part; a rotating groove is formed in the valve rod in a penetrating manner, the driving part extends to the rotating groove, a limiting groove is formed in the valve body, and a limiting block matched with the limiting groove in a limiting manner is arranged on the mounting seat; when the input end and the output end are blocked by the valve element, the limiting block is limited and clamped into the limiting groove; when the input end and the output end are not blocked by the valve element, the limiting block is separated from the limiting groove; the driving part comprises a driving handle located at the top end, a handle groove communicated with the rotating groove is formed in the valve rod, the driving handle is located in the handle groove, the reversing gate valve can adjust the orientation of the sealing faces on the two sides, and therefore the overall service life of the gate valve is prolonged, and equipment operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to a valve, more specifically, it relates to a reversing gate valve. Background Art

[0002] A gate valve is a type of valve whose opening and closing parts (i.e., gate plates) move in a direction perpendicular to the medium flow direction (channel axis) to open and close the valve. The main function of a gate valve is to cut off the flow of the medium and is usually used for full open or full closed operations.

[0003] The gate valve has the following disadvantages: During the opening and closing process, there will be relative friction between the sealing surfaces, which is easy to cause wear and even scratches. Furthermore, because the pressure and scouring intensity of the gate plate surface on the inlet side are greater than the gate plate surface on the outlet side, the sealing surface of the gate plate on the inlet side will be worn or scratched during long-term use.

[0004] Moreover, a leaking gate valve cannot be repaired while in working condition and can only be shut down for inspection and maintenance. If it is used without being found to be worn, the worn parts or scratches may expand after being flushed by the pressurized fluid, and the damaged sealing surface may cause greater leakage, resulting in great economic losses from equipment shutdown. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a reversing gate valve, which can adjust the directions of the sealing surfaces on both sides, thereby extending the overall service life of the gate valve and ensuring the operation of the equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reversing gate valve, comprising a valve body, a valve stem and a valve core, the valve stem is connected to the valve core and is used to drive the valve core to block the input end and the output end of the valve body, the lower end of the valve stem is rotatably connected to a mounting seat, the valve core is detachably connected to the mounting seat, the mounting seat is upwardly extended with a driving part, a rotating groove is penetrated on the valve stem, the driving part extends to the rotating groove, a limiting groove is arranged in the valve body, and a limiting block cooperating with the limiting groove is arranged on the mounting seat;

[0007] When the input end and the output end are blocked by the valve core, the limit block is limited and inserted into the limit groove;

[0008] When the input end and the output end are not blocked by the valve core, the limit block is separated from the limit groove;

[0009] The driving part includes a driving handle located at the top end, the valve stem is provided with a handle groove connected with the rotation groove, and the driving handle is located in the handle groove.

[0010] To sum up, the utility model has the following beneficial effects: the valve stem can be rotated to drive the valve core to move up and down through the mounting seat, thereby realizing the isolation effect on the input end and the output end. Since the mounting seat is slidably connected to the limit groove through the limit block, the mounting seat will not rotate during the rotation of the valve stem, but will be lifted up and down through the valve stem.

[0011] When the limit block is separated from the limit groove, the mounting seat can be rotated by rotating the driving handle, thereby changing the sealing surfaces on both sides. When the sealing surface at the input end is worn due to the erosion of the pressure fluid, the sealing surfaces on both sides can be replaced to increase the overall service life of the valve.

[0012] The driving handle is stored in the handle groove to avoid equipment damage caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of a gate valve;

[0014] Figure 2 It is a cross-sectional view of the gate valve;

[0015] Figure 3 is a schematic diagram of the rotating tank;

[0016] Figure 4 A schematic diagram of a barrier component.

[0017] Figure numerals: 1. valve body; 11. limit groove; 2. valve stem; 21. rotation groove; 22. handle groove; 3. valve core; 4. mounting seat; 41. limit block; 5. driving part; 51. driving handle; 52. operating groove; 53. connecting hole; 54. first sealing ring; 55. second sealing ring; 6. blocking chamber; 7. switching chamber; 71. switching groove; 8. blocking component; 81. blocking ball; 82. reset spring. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] Reference Figures 1 to 4As shown, in order to achieve the above purpose, the utility model provides the following technical solutions: a reversing gate valve, including a valve body 1, a valve stem 2 and a valve core 3, the valve stem 2 is connected to the valve core 3, and is used to drive the valve core 3 to block the input end and the output end of the valve body 1, the lower end of the valve stem 2 is rotatably connected to a mounting seat 4, the valve core 3 is detachably connected to the mounting seat 4, the mounting seat 4 is extended upwardly to be provided with a driving part 5, the valve stem 2 is penetrated with a rotating groove 21, the driving part 5 extends to the rotating groove 21, a limiting groove 11 is provided in the valve body 1, and a limiting block 41 that cooperates with the limiting groove 11 is provided on the mounting seat 4;

[0020] When the input end and the output end are blocked by the valve core 3, the limit block 41 is limited and inserted into the limit groove 11;

[0021] When the input end and the output end are not blocked by the valve core 3, the limiting block 41 is separated from the limiting groove 11;

[0022] The driving portion 5 includes a driving handle 51 at the top end. The valve stem 2 is provided with a handle groove 22 communicating with the rotation groove 21 . The driving handle 51 is located in the handle groove 22 .

[0023] According to the design of the utility model, the valve stem 2 can rotate to drive the valve core 3 to move up and down through the mounting seat 4, thereby realizing the isolation effect on the input end and the output end. Since the mounting seat 4 is slidably connected to the limit groove 11 through the limit block 41, the mounting seat 4 will not rotate during the rotation of the valve stem 2, but will be lifted up and down through the valve stem 2.

[0024] When the limit block 41 is separated from the limit groove 11, the mounting seat 4 can be rotated by rotating the driving handle 51, so that the sealing surfaces on both sides change. When the sealing surface at the input end is worn due to the erosion of the pressure fluid, the sealing surfaces on both sides are replaced to increase the service life of the valve as a whole.

[0025] The driving handle 51 is accommodated in the handle groove 22 to avoid equipment damage caused by misoperation.

[0026] Furthermore, an indicator is provided on the outer side of the valve stem 2 . During the rotation process, the position of the indicator can be observed to understand the position of the limit block 41 , thereby avoiding damage to the equipment caused by forced rotation of the driving part 5 .

[0027] The indicator may adopt plated scale lines.

[0028] Furthermore, since the connection between the valve core 3 and the mounting seat 4 is detachable, in the later disassembly, renovation and maintenance process, if other conditions permit, the utilization rate of the equipment can be improved by replacing the valve core 3. There are many detachable connection methods, which can be selected according to the type and shape of the valve core 3, and they are not described here.

[0029] The valve body 1 includes a barrier chamber 6 and a switching chamber 7, the valve core 3 moves back and forth along the switching chamber 7 and the barrier chamber 6, and the rotation groove 21 is arranged on the inner wall of the switching chamber 7;

[0030] When the valve core 3 is located in the blocking chamber 6, the limiting block 41 is located in the limiting groove 11;

[0031] When the valve core 3 is completely located in the switching chamber 7 , the limiting block 41 is separated from the limiting groove 11 .

[0032] like Figure 2 As shown, at this time, the valve core 3 is located in the barrier chamber 6. When the valve core 3 moves upward, the barrier chamber 6 is connected, and the liquid can flow from the input end to the output end.

[0033] Two groups of limiting grooves 11 are provided, and are symmetrically arranged on both sides of the switching cavity 7 , and two groups of limiting blocks 41 are provided, and are symmetrically arranged on both sides of the mounting seat 4 .

[0034] The two groups of symmetrically arranged limit blocks 41 and limit grooves 11 can facilitate that after the valve core 3 rotates 180°, the limit blocks 41 and the limit grooves 11 still correspond to each other, thereby ensuring the stability of the limit.

[0035] A switching groove 71 is arranged in the switching cavity 7 . The switching groove 71 is communicated with the upper end of the limiting groove 11 . A blocking component 8 is arranged in the switching groove 71 .

[0036] The blocking component 8 includes a blocking ball 81 and a return spring 82 . The blocking ball 81 is installed in the switching groove 71 via the return spring 82 .

[0037] Four groups of blocking components 8 are provided, and two by two are distributed on both sides of the notches of the two limiting grooves 11 .

[0038] Through the design of the blocking component 8, when the operator rotates the driving part 5 (driving rod), the limit block 41 and the blocking ball 81 collide with each other, causing a sense of frustration, and the blocking ball 81 moves downward until the limit block 41 moves to the top of the limit groove 11, and the blocking ball 81 is reset under the action of the reset spring 82. Therefore, the operator can understand the rotation position according to the sense of frustration.

[0039] There are four groups so that the rotation direction can be selected either clockwise or counterclockwise, satisfying the diversity of operation.

[0040] like Figure 4As shown, the blocking ball 81 moves in a vertical direction. In addition, the blocking ball 81 can also move in a horizontal direction. Indicator windows can be provided on both sides of the valve body 1. A connecting rod is provided at one end of the blocking ball 81. The connecting rod can be visible through the indicating window during the pushing and sliding process. The return spring 82 is sleeved on the connecting rod and cooperates with the valve body 1 (a spring groove is provided on the valve body 1, and the return spring 82 is located in the spring groove. Connecting rod arms extend from both ends of the connecting rod, and the connecting rod arms abut against the return spring 82, so that the return spring 82 is pushed during the movement of the connecting rod). When the limit block 41 pushes the blocking ball 81, the connecting rod moves toward the indicating window (in a visible state) and compresses the return spring 82. When the limit block 41 moves to above the limit groove 11, the return spring 82 causes the connecting rod (restored to an invisible state) and the blocking ball 81 to reset.

[0041] Therefore, the position of the connecting rod can be observed through the pointing window to determine whether the limiting block 41 reaches the upper side of the limiting groove 11.

[0042] A plurality of operating slots 52 are hollowed out on the driving handle 51. Figure 1 As shown, the driving handle 51 can be rotated by toggling the operating slot 52 .

[0043] A connection hole 53 is provided at the center of the driving handle 51, and the connection hole 53 is used for connecting an external operating handle. The design of the connection hole 53 can realize an external operating handle, and can be suitable for valves with large rotation resistance.

[0044] A first sealing ring 54 is provided between the mounting seat 4 and the outer side of the driving part 5, and a second sealing ring 55 is provided between the driving part 5 and the valve stem 2. The design of the sealing ring can realize multiple sealing and ensure the airtightness of the sealing of the valve stem 2.

[0045] The valve core 3 comprises at least two sealing surfaces, each of which is provided with a sealing member. The sealing member is detachably connected to the valve core 3, and when the valve core 3 needs to be repaired, the sealing effect of the valve core 3 can be effectively improved by replacing the sealing member.

[0046] The sealing member may be a sealing ring or a sealing plate.

[0047] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A reversing gate valve, comprising a valve body (1), a valve stem (2) and a valve core (3), wherein the valve stem (2) is connected to the valve core (3) and is used to drive the valve core (3) to block the input end and the output end of the valve body (1), wherein: The lower end of the valve stem (2) is rotatably connected to a mounting seat (4), the valve core (3) is detachably connected to the mounting seat (4), the mounting seat (4) is provided with a driving portion (5) extending upward, a rotation groove (21) is provided through the valve stem (2), the driving portion (5) extends to the rotation groove (21), a limiting groove (11) is provided in the valve body (1), and a limiting block (41) is provided on the mounting seat (4) and is matched with the limiting groove (11); When the input end and the output end are blocked by the valve core (3), the limit block (41) is limited and snapped into the limit groove (11); When the input end and the output end are not blocked by the valve core (3), the limit block (41) is separated from the limit groove (11); The driving part (5) comprises a driving handle (51) located at the top end, the valve stem (2) is provided with a handle groove (22) connected to the rotation groove (21), and the driving handle (51) is located in the handle groove (22).

2. A reversing gate valve according to claim 1, characterized in that: The valve body (1) includes a barrier chamber (6) and a switching chamber (7), the valve core (3) moves back and forth along the switching chamber (7) and the barrier chamber (6), and the rotating groove (21) is arranged on the inner wall of the switching chamber (7); When the valve core (3) is located in the blocking chamber (6), the limiting block (41) is located in the limiting groove (11); When the valve core (3) is completely located in the switching chamber (7), the limiting block (41) is separated from the limiting groove (11).

3. A reversing gate valve according to claim 2, characterized in that: The limiting grooves (11) are provided in two groups and are symmetrically arranged on both sides of the switching cavity (7), and the limiting blocks (41) are provided in two groups and are symmetrically arranged on both sides of the mounting seat (4).

4. A reversing gate valve according to claim 3, characterized in that: A switching groove (71) is arranged in the switching cavity (7), the switching groove (71) is connected to the upper end of the limiting groove (11), and a blocking component (8) is arranged in the switching groove (71).

5. A reversing gate valve according to claim 4, characterized in that: The blocking component (8) comprises a blocking ball (81) and a return spring (82), and the blocking ball (81) is installed in the switching groove (71) via the return spring (82).

6. A reversing gate valve according to claim 5, characterized in that: The blocking components (8) are provided in four groups, and are distributed in pairs on both sides of the notches of the two limiting grooves (11).

7. A reversing gate valve according to claim 1, characterized in that: The driving handle (51) is hollowed out with a plurality of operating slots (52).

8. A reversing gate valve according to claim 7, characterized in that: A connection hole (53) is provided at the center of the driving handle (51), and the connection hole (53) is used for connecting an external operating handle.

9. A reversing gate valve according to any one of claims 1 to 8, characterized in that: A first sealing ring (54) is provided between the mounting seat (4) and the outer side of the driving part (5), and a second sealing ring (55) is provided between the driving part (5) and the valve stem (2).

10. A reversing gate valve according to any one of claims 1 to 8, characterized in that: The valve core (3) comprises at least two sealing surfaces, both of which are provided with sealing elements.

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