A gate valve

Abstract

The present invention relates to a gate valve, comprising a valve body with a liquid inlet pipe and a liquid outlet pipe and a valve cover fixedly arranged on the upper end of the valve body, the gate valve also comprises: a valve stem, a control rod, a gate plate, and an arc-shaped push plate, the gate plate is slidably connected to the control rod, a flow hole is provided on the gate plate, when the gate plate is in a first working position, the gate plate can block the liquid inlet pipe and the liquid outlet pipe, when the gate plate is in a second working position, the flow hole connects the liquid inlet pipe and the liquid outlet pipe, the arc-shaped push plate is slidably arranged on the gate plate, and is connected to the lower end of the control rod, when the upper edge of the flow hole and the valve body are resisted by foreign matter so that the gate plate cannot continue to move downward, the control rod can push the arc-shaped push plate to extend from the upper edge of the flow hole to push away the foreign matter. The advantages of the present invention are: by setting the arc-shaped push plate, when the gate plate is stuck by foreign matter during closing, the arc-shaped push plate can extend to push away the foreign matter, so that the gate plate can be closed smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline valves, and in particular to a gate valve. Background Art

[0002] Gate valves are the most important type of valves currently, and are widely used for the circulation and shutoff of a variety of media. Usually, a gate valve includes a valve body, which is provided with an inlet and an outlet, and a gate plate that can block the inlet and the outlet is provided in the valve body. The gate plate can move up and down and will not rotate. At the same time, a valve stem is connected to the upper part of the gate plate. After the valve stem rotates, the valve stem is driven to move up and down through the threaded cooperation between the valve stem and the upper cover, and then the gate plate is driven to move up and down to close or open the gate valve; when the existing gate valve is used to pass or cut off the slag-water mixture, due to the large amount of solid impurities in the medium, when the gate plate is closed, solid impurities are often stuck between the gate plate and the sealing surface, so that the gate plate cannot be closed normally, and long-term use will also affect the life of the gate valve. Summary of the invention

[0003] Based on this, it is necessary to provide a gate valve to address the above problem, which can prevent the gate from being stuck by foreign objects during the closing process.

[0004] The present invention discloses a gate valve, comprising a valve body having a liquid inlet pipe and a liquid outlet pipe and a valve cover fixedly arranged at the upper end of the valve body, the gate valve further comprising: a valve stem, which is threadedly connected to the valve cover; a control rod, which is slidably connected to the lower end of the valve stem, and can drive the control rod to slide in a vertical direction by rotating the valve stem; a gate plate, which is slidably connected to the control rod, and a flow hole is provided on the gate plate, when the gate plate is in a first working position, the gate plate can block the liquid inlet pipe and the liquid outlet pipe, when the gate plate is in a second working position, the flow hole connects the liquid inlet pipe and the liquid outlet pipe;

[0005] An arc-shaped push plate is slidably arranged on the gate plate and connected to the lower end of the control rod. When the gate plate cannot continue to move downward due to the resistance of foreign matter between the upper edge of the flow hole and the valve body, the control rod can push the arc-shaped push plate to extend from the upper edge of the flow hole to push away the foreign matter.

[0006] In one embodiment, the gate valve has a positioning assembly, which includes a push rod, a first elastic member, a push ball, a limit block, and a second elastic member. The upper end of the first elastic member abuts the lower end of the valve stem, and the lower end abuts the control rod. The push rod is slidably arranged in the control rod. The lower end of the push rod is provided with an inclined surface, and the inclined surface abuts the push ball. The limit block is slidably arranged on the gate plate in a horizontal direction. One end of the second elastic member abuts the gate plate, and the other end abuts the limit block. A limit hole is provided on one side of the control rod in a horizontal direction, and the limit block can extend into the limit hole, so that the control rod is clamped with the gate plate. When the gate plate is abutted by a foreign object, the valve stem can continue to move downward, squeeze the first elastic member and push the push rod downward, thereby driving the push ball to move in the horizontal direction, so as to push the limit block to slide in the horizontal direction and disengage from the limit hole, so that the gate plate can move upward relative to the control rod, thereby enabling the arc-shaped push plate to extend out of the gate plate.

[0007] In one embodiment, an abutment ring is provided on the control rod, and a third elastic member is provided between the upper side of the abutment ring and the gate plate. When the limit block is disengaged from the limit hole, the third elastic member can drive the gate plate to move upward, thereby extending the arc-shaped push plate.

[0008] In one embodiment, two arc-shaped push plates are provided on the gate plate, namely a first arc-shaped push plate and a second arc-shaped push plate, and a first arc-shaped hole and a second arc-shaped hole are correspondingly provided on the gate plate, the first arc-shaped push plate is slidably provided in the first arc-shaped hole, the second arc-shaped push plate is slidably provided in the second arc-shaped hole, and the first arc-shaped push plate can be moved to the connection between the flow hole and the liquid inlet pipe, and the second arc-shaped push plate can be moved to the connection between the flow hole and the liquid outlet pipe.

[0009] In one embodiment, when the first arc-shaped push plate is extended, the end surface of the first arc-shaped push plate can be flush with the end surface of the gate plate close to the liquid inlet pipe; when the second arc-shaped push plate is extended, the end surface of the second arc-shaped push plate can be flush with the end surface of the gate plate close to the liquid outlet pipe.

[0010] In one of the embodiments, a horizontal slide groove is provided at the lower end of the control rod, and sliding blocks are provided on the first arc-shaped push plate and the second arc-shaped push plate, and the sliding blocks are slidably disposed in the horizontal slide groove.

[0011] In one of the embodiments, an abutment protrusion is provided on the valve cover, and when the gate plate moves to the point where the flow hole matches the liquid inlet pipe, the upper end of the gate plate abuts against the abutment protrusion.

[0012] In one of the embodiments, a sliding groove is provided on the gate plate in the vertical direction, and a slider slidably connected to the sliding groove is fixedly provided on the control rod, so that the control rod can drive the gate plate to rotate.

[0013] The advantages of the present invention are:

[0014] 1. By setting the first arc-shaped push plate and the second arc-shaped push plate, when the gate is stuck by foreign objects during closing, the arc-shaped push plate can extend to push away the solid impurities, so that the gate can be closed smoothly;

[0015] 2. By using the positioning assembly to control the gate and the control rod, when the arc-shaped push plate is extended, the gate rises to a certain height synchronously, so that the solid impurities will not be stuck, and the arc-shaped push plate can easily push out the solid impurities;

[0016] 3. Through the cooperation between the valve stem and the control rod, when the gate is stuck, the valve stem and the control rod are relatively displaced, so that the positioning assembly is unlocked, thereby extending the arc push plate. This process does not require any extra operations, and when the valve stem is rotated to drive the gate to open, the arc push plate can be controlled to retract and reset without any extra operations. It is convenient and simple to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the gate of the present invention when it is in the first working position;

[0018] Figure 2 For the present invention Figure 1 A partial enlarged view of point I in the middle;

[0019] Figure 3 It is a cross-sectional view of the gate of the present invention when it is stuck by foreign matter;

[0020] Figure 4 A cross-sectional view of the positioning assembly of the present invention when unlocked;

[0021] Figure 5 It is a cross-sectional view of the arc-shaped push plate of the present invention when pushing out solid impurities;

[0022] Figure 6 It is a cross-sectional view of the gate of the present invention when it is in the second working position;

[0023] Figure 7 This is a three-dimensional view of the first arc-shaped push plate provided by the present invention.

[0024] In the figure, the valve body 1, the liquid inlet pipe 11, the liquid outlet pipe 12, the valve cover 2, the abutting protrusion 21, the valve stem 3, the control rod 4, the limit hole 41, the abutting ring 42, the horizontal slide groove 43, the slider 44, the third elastic member 45, the gate 5, the flow hole 51, the first arc hole 52, the second arc hole 53, the sliding groove 54, the first arc push plate 61, the second arc push plate 62, the sliding block 63, the push rod 71, the inclined surface 711, the first elastic member 72, the push ball 73, the limit block 74, and the second elastic member 75. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0026] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0028] like Figures 1 to 7 As shown, the present invention discloses a gate valve, comprising a valve body 1 having a liquid inlet pipe 11 and a liquid outlet pipe 12, and a valve cover 2 fixedly arranged at the upper end of the valve body 1, and the gate valve further comprises: a valve stem 3, which is threadedly connected to the valve cover 2; a control rod 4, which is slidably connected to the lower end of the valve stem 3, and the control rod 4 can be driven to slide in the vertical direction by rotating the valve stem 3; a gate plate 5, which is slidably connected to the control rod 4, and a flow hole 51 is opened on the gate plate 5. When the gate plate 5 is in the first working position, as shown in FIG. Figure 6 As shown, the gate plate 5 can block the liquid inlet pipe 11 and the liquid outlet pipe 12. When the gate plate 5 is in the second working position, as shown in FIG. Figure 1As shown, the flow hole 51 connects the liquid inlet pipe 11 and the liquid outlet pipe 12; the arc-shaped push plate is slidably arranged on the gate plate 5 and connected to the lower end of the control rod 4. When the gate plate 5 cannot continue to move downward due to the resistance of foreign matter between the upper edge of the flow hole 51 and the valve body 1, the control rod 4 can push the arc-shaped push plate to extend from the upper edge of the flow hole 51 to push away the foreign matter.

[0029] It is understandable that when the gate valve is installed in a fluid pipeline with a lot of impurities, the gate plate 5 is easily stuck by solid impurities during the closing process, resulting in an inability to close, or even damage to the gate plate 5, affecting the sealing effect. Therefore, the present invention provides an arc-shaped push plate. When the gate plate 5 is blocked, the arc-shaped push plate can be extended to clean the impurities, thereby ensuring that the gate plate 5 can be closed normally.

[0030] Preferably, the gate valve has a positioning assembly, which includes a push rod 71, a first elastic member 72, a push ball 73, a limit block 74, and a second elastic member 75. The upper end of the first elastic member 72 abuts against the lower end of the valve stem 3, and the lower end abuts against the control rod 4. The push rod 71 is slidably arranged in the control rod 4. The lower end of the push rod 71 is provided with an inclined surface 711, and the inclined surface 711 abuts against the push ball 73. The limit block 74 is slidably arranged on the gate plate 5 in the horizontal direction. One end of the second elastic member 75 abuts against the gate plate 5, and the other end abuts against the limit A limiting hole 41 is provided on one side of the control rod 4 in the horizontal direction, and the limiting block 74 can extend into the limiting hole 41, so that the control rod 4 is engaged with the gate plate 5. When the gate plate 5 is abutted by a foreign object, the valve stem 3 can continue to move downward, squeeze the first elastic member 72 and push the push rod 71 downward, thereby driving the push ball 73 to move in the horizontal direction, so as to push the limiting block 74 to slide in the horizontal direction and disengage from the limiting hole 41, so that the gate plate 5 can move upward relative to the control rod 4, thereby enabling the arc-shaped push plate to extend out of the gate plate 5.

[0031] It can be understood that by setting the positioning assembly, when the gate plate 5 is blocked during the downward movement of the valve stem 3, the valve stem 3 can continue to move downward and the control rod 4 and the gate plate 5 are automatically disengaged, so that the control rod 4 can push the arc-shaped push plate to extend and clean up impurities.

[0032] Preferably, an abutment ring 42 is provided on the control rod 4, and a third elastic member 45 is provided between the upper side of the abutment ring 42 and the gate plate 5. When the limit block 74 is out of the limit hole 41, the third elastic member 45 can drive the gate plate 5 to move upward, thereby extending the arc-shaped push plate.

[0033] It should be noted that when the limit block 74 is disengaged from the limit hole 41, the gate plate 5 can move upward a certain distance relative to the control rod 4 under the action of the third elastic member 45, thereby loosening the foreign matter. At the same time, the gate plate 5 moves upward to extend the arc-shaped push plate to push away the foreign matter, so that the gate plate 5 can fall smoothly.

[0034] Preferably, combined Figure 3 and Figure 4 As shown, the gate plate 5 is provided with two arc-shaped push plates, namely a first arc-shaped push plate 61 and a second arc-shaped push plate 62, and the gate plate 5 is correspondingly provided with a first arc-shaped hole 52 and a second arc-shaped hole 53, the first arc-shaped push plate 61 is slidably set in the first arc-shaped hole 52, the second arc-shaped push plate 62 is slidably set in the second arc-shaped hole 53, and the first arc-shaped push plate 61 can move to the connection between the through hole 51 and the liquid inlet pipe 11, and the second arc-shaped push plate 62 can move to the connection between the through hole 51 and the liquid outlet pipe 12.

[0035] It should be noted that one end of the flow hole 51 is connected to the liquid inlet pipe 11, and the other end is connected to the liquid outlet pipe 12. After the first arc-shaped push plate 61 is extended, it can push away foreign objects located on one side of the liquid inlet pipe 11, and after the second arc-shaped push plate 62 is extended, it can push away foreign objects located on one side of the liquid outlet pipe 12.

[0036] Preferably, when the first arc-shaped push plate 61 is extended, the end surface of the first arc-shaped push plate 61 can be flush with the end surface of the gate plate 5 on one side close to the liquid inlet pipe 11; when the second arc-shaped push plate 62 is extended, the end surface of the second arc-shaped push plate 62 can be flush with the end surface of the gate plate 5 on one side close to the liquid outlet pipe 12.

[0037] Such an arrangement enables the first arc-shaped push plate 61 and the second arc-shaped push plate 62 to smoothly push away foreign matter without affecting the closing of the gate plate 5 .

[0038] Preferably, a horizontal slide groove 43 is provided at the lower end of the control rod 4 , and a sliding block 63 is provided on both the first arc-shaped push plate 61 and the second arc-shaped push plate 62 , and the sliding block 63 is slidably disposed in the horizontal slide groove 43 .

[0039] It is understandable that if Figure 4 and Figure 5 As shown, when the first arc push plate 61 and the second arc push plate 62 extend out of the gate plate 5, they slide along the arc hole, so that the upper ends of the first arc push plate 61 and the second arc push plate 62 move horizontally. By setting the horizontal slide groove 43, the first arc push plate 61 and the second arc push plate 62 can be smoothly extended.

[0040] Preferably, an abutment protrusion 21 is provided on the valve cover 2 , and when the gate plate 5 moves to the point where the flow hole 51 matches the liquid inlet pipe 11 , the upper end of the gate plate 5 abuts against the abutment protrusion 21 .

[0041] Preferably, a sliding groove 54 is provided on the gate plate 5 along the vertical direction, and a slider 44 slidably connected to the sliding groove 54 is fixedly provided on the control rod 4, so that the control rod 4 can drive the gate plate 5 to rotate.

[0042] The working mode of the present invention is: Figures 1 to 3 As shown, when the gate plate 5 needs to be closed, the valve stem 3 is rotated forward, and since the valve stem 3 is threadedly connected to the valve cover 2, the valve stem 3 moves downward, and since the first elastic member 72 abuts against the control rod 4, the valve stem 3 can drive the control rod 4 and then drive the gate plate 5 to move downward. It is worth mentioning that at this time, the limit block 74 is located in the limit hole 41, so that the control rod 4 is clamped with the gate plate 5.

[0043] like Figures 3 to 6 As shown in FIG. 1 , when the gate plate 5 is abutted by foreign matter and cannot continue to move downward, the screw can continue to move downward, thereby pushing the push rod 71 to move downward, and the limit block 74 is separated from the limit hole 41 by pushing the ball 73. The gate plate 5 moves upward under the action of the third elastic member 45, and the first arc push plate 61 and the second arc push plate 62 are extended synchronously, as shown in FIG. Figure 5 As shown, the foreign matter blocking between the gate plate 5 and the valve body 1 is pushed away, so that the gate plate 5 can continue to move downward to the bottom to close the gate valve, as shown in FIG. Figure 6 shown.

[0044] It is worth mentioning that when the first arc-shaped push plate 61 is extended, it can close the gap between the flow hole 51 and the liquid inlet pipe 11. When the second arc-shaped push plate 62 is extended, it can close the gap between the flow hole 51 and the liquid outlet pipe 12 to prevent the gate plate 5 from being stuck by foreign objects again.

[0045] When the gate valve needs to be opened, the valve stem 3 is rotated in the opposite direction and rises in the vertical direction. When the valve stem 3 abuts against the control rod 4, the control rod 4 is simultaneously driven to move upward. Due to the action of the third elastic member 45, the control rod 4 moves upward and the gate plate 5 is also driven to move upward, so that the gate is opened. When the upper end of the gate plate 5 abuts against the abutting protrusion 21, the gate plate 5 no longer moves upward and continues to rotate the valve stem 3 in the opposite direction. The valve stem 3 can drive the control rod 4 to continue to move upward and squeeze the third elastic member 45, so that the control rod 4 moves upward relative to the gate plate 5. When the position of the limiting hole 41 corresponds to the position of the limiting block 74, the limiting block 74 extends into the limiting hole 41 under the action of the second elastic member 75, so that the gate plate 5 and the control rod 4 are engaged. At the same time, the limiting block 74 pushes the push ball 73 to move in the horizontal direction, and pushes the push rod 71 upward and resets it through the inclined surface 711. When the control rod 4 moves upward, it can drive the first arc push plate 61 and the second arc push plate 62 to return to the gate plate 5, thereby completing the opening of the gate plate 5.

[0046] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A gate valve, comprising a valve body having a liquid inlet pipe and a liquid outlet pipe and a valve cover fixedly arranged on the upper end of the valve body, characterized in that: The gate valve further comprises: A valve stem, threadedly connected to the valve cover; A control rod is slidably connected to the lower end of the valve stem, and can drive the control rod to slide in a vertical direction by rotating the valve stem; A gate plate is slidably connected to the control rod, and a flow hole is formed on the gate plate. When the gate plate is in a first working position, the gate plate can block the liquid inlet pipe and the liquid outlet pipe. When the gate plate is in a second working position, the flow hole connects the liquid inlet pipe and the liquid outlet pipe. An arc-shaped push plate is slidably disposed on the gate plate and connected to the lower end of the control rod. When a foreign object is held between the upper edge of the through hole and the valve body so that the gate plate cannot continue to move downward, the control rod can push the arc-shaped push plate out from the upper edge of the through hole to push the foreign object away. The gate valve has a positioning assembly, which includes a push rod, a first elastic member, a push ball, a limit block, and a second elastic member, wherein the upper end of the first elastic member abuts against the lower end of the valve stem, and the lower end abuts against the control rod, the push rod is slidably arranged in the control rod, the lower end of the push rod is provided with an inclined surface, the inclined surface abuts against the push ball, the limit block is slidably arranged on the gate plate in a horizontal direction, one end of the second elastic member abuts against the gate plate, and the other end abuts against the limit block, a limit hole is provided on one side of the control rod in a horizontal direction, the limit block can extend into the limit hole, so that the control rod is clamped with the gate plate, when the gate plate is abutted by a foreign object, the valve stem can continue to move downward, squeeze the first elastic member and push the push rod downward, thereby driving the push ball to move in the horizontal direction, so as to push the limit block to slide in the horizontal direction and disengage from the limit hole, so that the gate plate can move upward relative to the control rod, thereby enabling the arc-shaped push plate to extend out of the gate plate; The control rod is provided with an abutment ring, and a third elastic member is provided between the upper side of the abutment ring and the gate plate. When the limit block is separated from the limit hole, the third elastic member can drive the gate plate to move upward, so that the arc-shaped push plate extends; The gate plate is provided with two arc-shaped push plates, namely a first arc-shaped push plate and a second arc-shaped push plate, and the gate plate is provided with a first arc-shaped hole and a second arc-shaped hole correspondingly, the first arc-shaped push plate is slidably arranged in the first arc-shaped hole, the second arc-shaped push plate is slidably arranged in the second arc-shaped hole, and the first arc-shaped push plate can move to the connection between the through-hole and the liquid inlet pipe, and the second arc-shaped push plate can move to the connection between the through-hole and the liquid outlet pipe; A horizontal slide groove is provided at the lower end of the control rod, and sliding blocks are provided on the first arc-shaped push plate and the second arc-shaped push plate, and the sliding blocks are slidably provided in the horizontal slide groove; The valve cover is provided with an abutting protrusion, and when the gate plate moves to the point where the flow hole matches the liquid inlet pipe, the upper end of the gate plate abuts against the abutting protrusion.

2. The gate valve according to claim 1, characterized in that: When the first arc-shaped push plate is extended, the end surface of the first arc-shaped push plate can be flush with the end surface of the gate plate close to the liquid inlet pipe; when the second arc-shaped push plate is extended, the end surface of the second arc-shaped push plate can be flush with the end surface of the gate plate close to the liquid outlet pipe.

3. The gate valve according to claim 2, characterized in that: The gate plate is provided with a sliding groove in the vertical direction, and the control rod is fixedly provided with a sliding block slidably connected to the sliding groove, so that the control rod can drive the gate plate to rotate.

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