Operating mechanism of gate valve

Abstract

The invention provides an operating mechanism of a gate valve, and relates to the field of valves. The bottom end face of the gate valve cover is connected with a gate valve body in a bolt fastening mode. A gate valve rod is connected in the gate valve cover in a sliding manner; a gate valve flashboard is arranged at the lower part of the gate valve rod; the gate valve flashboard is arranged in the gate valve body; a mounting frame is arranged on the top end surface of the gate valve cover; and the right part of the mounting frame is rotationally connected with a control rotating handle. The control cam can be driven to rotate in the process that the control rotating handle is rotated to control the gate valve disc to ascend and descend, and then the meshing position of the gate valve rod and the control worm gear and the meshing position of the control worm and the control worm gear are lubricated through a series of transmission. Therefore, workers need to lubricate the gate valves one by one, and the labor intensity of the workers is high.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to an operating mechanism for a gate valve. Background Art

[0002] In pipeline systems in industry and daily life, in order to conveniently cut off the flow of fluid in the pipeline to prevent the backflow of the medium, a gate valve is usually installed on the pipeline. And in order to facilitate the staff to better control the gate valve, an operating mechanism is usually set on the gate valve. The operating mechanism of the existing gate valve usually consists of a turning handle, a worm, a worm gear, a valve stem and a gate.

[0003] For example: The invention patent with the application number CN202311360165.5 discloses a sealing gate valve. Specifically, the present invention relates to the technical field of gate valves, and particularly to a sealing gate valve with good sealing performance and stable structure, including a valve body, a valve cover, a sealing device and an operating device. The valve cover is arranged above the valve body. Two diversion openings are formed in the valve body and arranged oppositely. The sealing device is arranged between the two diversion openings in the valve body and can move up and down. The sealing device includes an elastic connection part and sealing plates arranged on both sides of the elastic connection part. The operating device includes a valve stem that can move up and down and is arranged on the valve body and the valve cover. A connection head for connecting the sealing device is arranged at the lower end of the valve stem. Connection rings are symmetrically hinged on both sides of the free ends of the two connection heads. Hinge holes for inserting and connecting the connection rings are arranged on each of the sealing plates. Inclined surfaces are respectively arranged on the inner sides of the two sealing plates. Gradients matching the inclined surfaces are arranged on both sides of the outside of the connection head. The connection head can slide up and down on the inclined surfaces between the two sealing plates through the gradient.

[0004] However, during the long-term use of the operating mechanism of the existing gate valve, components such as the worm gear, worm and valve stem will wear, resulting in easy jamming during the operation of the valve by the staff. In order to reduce the occurrence of jamming and ensure smooth operation, it is usually necessary for the staff to regularly lubricate components such as the worm gear, worm and valve stem. However, a large pipeline system usually contains a large number of gate valves, which makes it necessary for the staff to lubricate these gate valves one by one, increasing the labor intensity of the staff and making it inconvenient to use. Summary of the Invention

[0005] In view of this, the present invention provides an operating mechanism for a gate valve, which has a control cam, a plunger box and a plunger rod capable of automatically lubricating a control worm, a control worm gear and a gate valve stem. During the process of operating the handlebar to rotate, the control cam will be driven to rotate. As the control cam rotates, it will squeeze the control slide plate, causing the control slide plate to move within the connecting frame. As the connecting frame moves, the plunger rod will slide within the plunger box and squeeze the control spring. When the control cam squeezes the control slide plate, the plunger rod will slide upward within the plunger box, pressing out the grease in the plunger box. When the convex part of the control cam moves away from the control slide plate, the control slide plate will reset with the rebound of the control spring, causing the control slide plate to drive the plunger rod to slide downward within the plunger box, creating a negative pressure within the plunger box. The setting of the replenishing pipe facilitates the staff to replenish the grease in the grease storage tank. When a negative pressure is generated in the plunger box, the suction pipe will suck the grease in the grease storage tank into the plunger box. Subsequently, as the plunger rod moves upward, the grease in the plunger box will be pressed into the meshing part of the gate valve stem and the control worm gear for lubrication. And through the setting of the shunt pipe, the grease can be shunted during the process of the outlet pipe transporting the grease, so that part of the grease flows to the meshing part of the control worm and the control worm gear for lubrication.

[0006] The present invention provides the purpose and efficacy of an operating mechanism for a gate valve, which specifically includes: a gate valve bonnet; a gate valve body is bolted and fixedly connected to the bottom end surface of the gate valve bonnet; a gate valve stem is slidably connected within the gate valve bonnet; a gate valve disc is provided at the lower part of the gate valve stem; the gate valve disc is arranged within the gate valve body; an installation bracket is provided on the top end surface of the gate valve bonnet; a control handlebar is rotatably connected to the right part of the installation bracket; a plurality of groups of limit jacks are arranged in a circular array on the top end surface of the gate valve bonnet; a grease storage tank is fixedly connected to the rear part of the installation bracket; a replenishing pipe is fixedly connected to the center of the top end surface of the grease storage tank; a connecting frame is fixedly connected to the rear part of the installation bracket; the connecting frame is aligned with the position of the control handlebar.

[0007] Further, a control worm is coaxially and fixedly connected to the center of the outside of the control handlebar; a control worm gear is rotatably connected within the left part of the installation bracket; the control worm gear meshes with the control worm; the gate valve stem is threadedly connected to the inside of the control worm gear.

[0008] Further, a control cam is coaxially and fixedly connected to the rear part of the control handlebar; a control slide plate is slidably connected within the connecting frame; the control slide plate contacts the outer wall of the control cam.

[0009] Further, a plunger rod is fixedly connected to the top end surface of the control slide plate; a plunger box is fixedly connected to the top end surface of the connecting frame; the plunger rod is slidably connected within the plunger box; two control springs are symmetrically and fixedly connected to the top end surface of the control slide plate; the ends of the two control springs are both fixedly connected to the bottom end surface of the plunger box.

[0010] Furthermore, a fat suction pipe is fixedly connected to the air inlet of the plunger box; the end of the fat suction pipe is arranged in the fat storage box; a one-way valve is arranged outside the fat suction pipe; an oil outlet pipe is fixedly connected to the air outlet of the plunger box; a one-way valve is arranged outside the oil outlet pipe; a shunt pipe is fixedly connected to the outside of the oil outlet pipe.

[0011] Furthermore, a support frame is fixedly connected to the outside of the plunger box; a control pressure plate is arranged inside the support frame; the control pressure plate is in an arc-shaped plate structure; a control screw rod is rotatably connected to the center of the top end surface of the control pressure plate; the control screw rod is threadedly connected inside the support frame; two guide sliding rods are symmetrically and fixedly connected to the top end surface of the control pressure plate; the two guide sliding rods are aligned with the position of the control screw rod; the two guide sliding rods are both slidably connected inside the support frame.

[0012] Furthermore, a plurality of groups of limit posts are fixedly connected to the bottom end surface of the mounting frame in an annular array; the plurality of groups of limit posts are respectively aligned with the positions of a plurality of groups of limit jacks; a plurality of groups of locking seats are fixedly connected to the upper part of the gate valve cover in an annular array; the ends of the plurality of groups of limit posts are respectively inserted into the plurality of groups of locking seats.

[0013] Furthermore, locking insertion rods are slidably connected inside the plurality of groups of locking seats; the plurality of groups of locking insertion rods are respectively inserted into the plurality of groups of limit posts; a group of connecting plates are fixedly connected to the outside of the plurality of groups of locking insertion rods; a group of connecting springs are fixedly connected to the inner sides of the plurality of groups of connecting plates; the ends of the plurality of groups of connecting springs are respectively fixedly connected to the outside of the plurality of groups of locking seats.

[0014] Beneficial effects During the process of rotating and controlling the handle to control the lifting of the gate valve gate plate, the present invention will drive the control cam to rotate. As the control cam rotates, it will squeeze the control slide plate, causing the control slide plate to drive the plunger rod to slide downward in the plunger box, creating a negative pressure in the plunger box, sucking the lubricating grease in the grease storage box into the plunger box and pressing it into the meshing part of the gate valve stem and the control worm gear for lubrication. And through the setting of the shunt pipe, the lubricating grease can be shunted during the process of the oil outlet pipe transporting the lubricating grease, enabling part of the lubricating grease to flow to the meshing part of the control worm and the control worm gear for lubrication, reducing the wear of the operating mechanism, ensuring the accuracy and reliability of the gate valve operating mechanism, keeping the opening and closing operation of the gate valve flexible and smooth for a long time, reducing the jamming of the gate valve operating mechanism during the operation process, making the operation more labor-saving. Especially in the case of frequent operation, it can effectively reduce the labor intensity of the operator and effectively improve the versatility of the gate valve operating mechanism.

[0015] By rotating the control screw rod to drive the control pressure plate to move, as the control pressure plate moves, it will drive the guiding slide rod to move within the support frame. As the guiding slide rod moves, it will provide guidance for the control pressure plate to ensure the stable movement of the control pressure plate. As the control pressure plate moves, it will extrude the grease outlet pipe to adjust the flow rate of the grease in the grease outlet pipe, facilitating the staff to accurately adjust the flow rate of the grease according to the actual working conditions, thereby controlling the supply quantity, prolonging the service life of the grease, and effectively improving the practicability of the operating mechanism of the gate valve.

[0016] When the staff needs to repair or maintain components such as the control worm and control worm gear within the mounting frame, they only need to pull the connecting plate to disengage it from the limit post. At this time, the staff can remove the mounting frame. After the repair or maintenance is completed, they only need to reinsert the limit post into the limit post, and then release the connecting plate to make the locking plug rod reset with the rebound of the connecting spring, and the position of the mounting frame can be fixed again. The operation is simple and fast, effectively improving the convenience of the operating mechanism of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0018] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0019] In the accompanying drawings: Figure 1 is an isometric structural schematic diagram of the present invention.

[0020] Figure 2 is a sectional structural schematic diagram of the present invention.

[0021] Figure 3 is an isometric structural schematic diagram of the present invention after the mounting frame is separated from the gate valve cover.

[0022] Figure 4 is a bottom view structural schematic diagram of the gate valve cover of the present invention.

[0023] Figure 5 is the present invention Figure 4 is an enlarged structural schematic diagram at A of the present invention.

[0024] Figure 6 is an isometric structural schematic diagram of the gate valve stem of the present invention.

[0025] Figure 7 is a sectional structural schematic diagram of the mounting frame of the present invention.

[0026] Figure 8 is an isometric structural schematic diagram of the section of the mounting frame of the present invention.

[0027] Figure 9 is the enlarged structural schematic diagram of point B of the present invention Figure 8

[0028] Figure 10 is the axonometric structural schematic diagram of the plunger box of the present invention

[0029] List of reference numerals 1. Gate valve bonnet; 101. Gate valve body; 102. Gate valve stem; 103. Gate valve disc; 104. Mounting bracket; 105. Limit post; 106. Limit jack; 107. Locking seat; 108. Locking plug; 109. Connecting plate; 110. Connecting spring; 111. Control grip; 112. Control worm; 113. Control worm gear; 114. Control cam; 115. Connecting frame; 116. Control slide plate; 117. Plunger box; 118. Control spring; 119. Plunger rod; 120. Grease storage tank; 121. Grease suction pipe; 122. Grease outlet pipe; 123. Diverging pipe; 124. Support frame; 125. Control pressure plate; 126. Control screw; 127. Guide slide bar; 128. Supplementary pipe Detailed implementation manners

[0030] Embodiment 1: The present invention provides an operating mechanism for a gate valve. Please refer to Figures 1 to 10 as shown, including: a gate valve bonnet 1; The bottom end surface of the gate valve bonnet 1 is bolted and fixedly connected with a gate valve body 101; a gate valve stem 102 is slidably connected in the gate valve bonnet 1; a gate valve disc 103 is arranged at the lower part of the gate valve stem 102; the gate valve disc 103 is arranged in the gate valve body 101; the top end surface of the gate valve bonnet 1 is provided with a mounting bracket 104; a control grip 111 is rotatably connected to the right part of the mounting bracket 104; a plurality of groups of limit jacks 106 are arranged on the top end surface of the gate valve bonnet 1 in an annular array; a grease storage tank 120 is fixedly connected to the rear part of the mounting bracket 104; a supplementary pipe 128 is fixedly connected to the center of the top end surface of the grease storage tank 120; a connecting frame 115 is fixedly connected to the rear part of the mounting bracket 104; the connecting frame 115 is aligned with the position of the control grip 111

[0031] Among them, a control worm 112 is coaxially and fixedly connected to the center of the outside of the control grip 111; a control worm gear 113 is rotatably connected in the left part of the mounting bracket 104; the control worm gear 113 meshes with the control worm 112; the gate valve stem 102 is threadedly connected to the inside of the control worm gear 113

[0032] Among them, a control cam 114 is coaxially and fixedly connected to the rear part of the control grip 111; a control slide plate 116 is slidably connected in the connecting frame 115; the control slide plate 116 contacts the outer wall of the control cam 114

[0033] ​Among them, a plunger rod 119 is fixedly connected to the top surface of the control slide plate 116; a plunger box 117 is fixedly connected to the top surface of the connecting frame 115; the plunger rod 119 is slidably connected within the plunger box 117; two control springs 118 are symmetrically and fixedly connected to the top surface of the control slide plate 116; the ends of the two control springs 118 are both fixedly connected to the bottom surface of the plunger box 117.

[0034] Among them, a fat suction pipe 121 is fixedly connected to the air inlet of the plunger box 117; the end of the fat suction pipe 121 is arranged within the fat storage box 120; a one-way valve is arranged outside the fat suction pipe 121; an oil outlet pipe 122 is fixedly connected to the air outlet of the plunger box 117; a one-way valve is arranged outside the oil outlet pipe 122; a shunt pipe 123 is fixedly connected to the outside of the oil outlet pipe 122.

[0035] Among them, a support frame 124 is fixedly connected to the outside of the plunger box 117; a control pressure plate 125 is arranged within the support frame 124; the control pressure plate 125 is of an arc-shaped plate structure; a control screw rod 126 is rotatably connected to the center of the top surface of the control pressure plate 125; the control screw rod 126 is threadedly connected within the support frame 124; two guide slide rods 127 are symmetrically and fixedly connected to the top surface of the control pressure plate 125; the two guide slide rods 127 are both aligned with the position of the control screw rod 126; the two guide slide rods 127 are both slidably connected within the support frame 124.

[0036] Specific usage method and function of this embodiment: In the present invention, by rotating the control worm 112, the control worm 112 drives itself to rotate. As the control worm 112 rotates, it drives the engaged control worm gear 113 to rotate. As the control worm gear 113 rotates, it drives the gate valve stem 102 to move. As the gate valve stem 102 moves, it drives the gate valve plate 103 to lift and lower, which facilitates the staff to control the opening and closing of the gate valve. During the process of rotating the control handle 111, it drives the control cam 114 to rotate. As the control cam 114 rotates, it squeezes the control slide plate 116, causing the control slide plate 116 to move within the connecting frame 115. As the connecting frame 115 moves, it drives the plunger rod 119 to slide within the plunger box 117 and squeeze the control spring 118. When the control cam 114 squeezes the control slide plate 116, the plunger rod 119 slides upward within the plunger box 117, pressing out the grease in the plunger box 117. When the convex part of the control cam 114 moves away from the control slide plate 116, the control slide plate 116 resets with the rebound of the control spring 118, causing the control slide plate 116 to drive the plunger rod 119 to slide downward within the plunger box 117, creating a negative pressure within the plunger box 117. The arrangement of the replenishing pipe 128 facilitates the staff to replenish the grease in the grease storage tank 120. The end of the grease outlet pipe 122 is aligned with the meshing position of the gate valve stem 102 and the control worm gear 113, and the end of the shunt pipe 123 is aligned with the meshing position of the control worm 112 and the control worm gear 113. When a negative pressure is generated in the plunger box 117, the grease suction pipe 121 sucks the grease in the grease storage tank 120 into the plunger box 117. Subsequently, as the plunger rod 119 moves upward, the grease in the plunger box 117 is pressed into the meshing position of the gate valve stem 102 and the control worm gear 113 through the grease outlet pipe 122 for lubrication. The arrangement of the shunt pipe 123 can shunt the grease during the process of the grease outlet pipe 122 transporting the grease, enabling part of the grease to flow to the meshing position of the control worm 112 and the control worm gear 113 for lubrication. At the same time, the arrangement of the one-way valve enables the grease suction pipe 121 and the grease outlet pipe 122 to only allow the grease to flow in one direction. The grease outlet pipe 122 is arranged within the support frame 124. By rotating the control screw 126, the control screw 126 drives the control pressing plate 125 to move. As the control pressing plate 125 moves, it drives the guiding slide rod 127 to move within the support frame 124. As the guiding slide rod 127 moves, it provides guidance for the control pressing plate 125 to ensure the stable movement of the control pressing plate 125. As the control pressing plate 125 moves, it squeezes the grease outlet pipe 122 to adjust the flow rate of the grease in the grease outlet pipe 122.

[0037] Embodiment Two: Based on Embodiment One, please refer to Figures 1 to 5As shown in the figure, it includes: a limit post 105, a locking seat 107, a locking plug 108, a connecting plate 109 and a connecting spring 110. A plurality of groups of limit posts 105 are fixedly connected to the bottom end surface of the mounting bracket 104 in an annular array; the positions of the plurality of groups of limit posts 105 are aligned with the positions of the plurality of groups of limit jacks 106 respectively; a plurality of groups of locking seats 107 are fixedly connected to the upper part of the gate valve cover 1 in an annular array; the ends of the plurality of groups of limit posts 105 are respectively inserted into the plurality of groups of locking seats 107.

[0038] Among them, a locking plug 108 is slidably connected in each of the plurality of groups of locking seats 107; the plurality of groups of locking plugs 108 are respectively inserted into the plurality of groups of limit posts 105; a connecting plate 109 is fixedly connected to the outside of each of the plurality of groups of locking plugs 108; a connecting spring 110 is fixedly connected to the inner side of each of the plurality of groups of connecting plates 109; the ends of the plurality of groups of connecting springs 110 are respectively fixedly connected to the outside of the plurality of groups of locking seats 107.

[0039] The specific usage mode and function of this embodiment: In the present invention, by inserting the limit post 105 through the limit jack 106 and into the locking seat 107, the positioning between the mounting bracket 104 and the gate valve cover 1 can be achieved. The position of the limit post 105 can be locked by the locking plug 108 to fix the mounting bracket 104 and the gate valve cover 1. When the staff needs to repair or maintain components such as the control worm 112 and the control worm gear 113 in the mounting bracket 104, only need to pull the connecting plate 109, so that the connecting plate 109 drives the locking plug 108 to move and stretch the connecting spring 110. As the locking plug 108 moves, it will disengage from the limit post 105. At this time, the staff can remove the mounting bracket 104. After the repair or maintenance is completed, only need to insert the limit post 105 back into the limit post 105, and then release the connecting plate 109, so that the locking plug 108 returns to its original position with the rebound of the connecting spring 110, and the position of the mounting bracket 104 can be fixed again.

[0040] In this article, the following points need to be noted: 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0041] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0042] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An operating mechanism for a gate valve, comprising: Gate valve bonnet (1); A gate valve body (101) is bolted and fastened to the bottom end face of the gate valve bonnet (1); A gate valve stem (102) is slidably connected within the gate valve bonnet (1); A gate valve disc (103) is provided at the lower part of the gate valve stem (102); It is characterized in that the gate valve disc (103) is arranged within the gate valve body (101); An installation frame (104) is provided on the top end face of the gate valve bonnet (1); A control handle (111) is rotatably connected to the right part of the installation frame (104); Multiple groups of limit jacks (106) are arranged in an annular array on the top end face of the gate valve bonnet (1); A grease storage tank (120) is fixedly connected to the rear part of the installation frame (104); A replenishing pipe (128) is fixedly connected to the center of the top end face of the grease storage tank (120); A connecting frame (115) is fixedly connected to the rear part of the installation frame (104); The connecting frame (115) is aligned with the position of the control handle (111).

2. The operating mechanism of a gate valve according to claim 1, characterized in that: A control worm (112) is coaxially and fixedly connected to the center of the exterior of the control handle (111); A control worm gear (113) is rotatably connected within the left part of the installation frame (104); The control worm gear (113) meshes with the control worm (112); The gate valve stem (102) is threadedly connected to the inside of the control worm gear (113).

3. The operating mechanism of a gate valve as claimed in claim 1, characterized in that: A control cam (114) is coaxially and fixedly connected to the rear part of the control handle (111); A control slide plate (116) is slidably connected within the connecting frame (115); The control slide plate (116) contacts the outer wall of the control cam (114).

4. The operating mechanism of a gate valve according to claim 3, characterized in that: A plunger rod (119) is fixedly connected to the top end face of the control slide plate (116); A plunger chamber (117) is fixedly connected to the top end face of the connecting frame (115); The plunger rod (119) is slidably connected within the plunger chamber (117); Two control springs (118) are symmetrically and fixedly connected to the top end face of the control slide plate (116); The ends of the two control springs (118) are both fixedly connected to the bottom end face of the plunger chamber (117).

5. The operating mechanism of a gate valve according to claim 4, characterized in that: A grease suction pipe (121) is fixedly connected to the air inlet of the plunger chamber (117); The end of the grease suction pipe (121) is arranged within the grease storage tank (120); A check valve is arranged on the exterior of the grease suction pipe (121); An oil outlet pipe (122) is fixedly connected to the air outlet of the plunger chamber (117); A check valve is arranged on the exterior of the oil outlet pipe (122); A shunt pipe (123) is fixedly connected to the exterior of the oil outlet pipe (122).

6. The operating mechanism of a gate valve according to claim 4, characterized in that: An external part of the plunger box (117) is fixedly connected with a support frame (124); a control pressure plate (125) is arranged inside the support frame (124); the control pressure plate (125) is in an arc plate-shaped structure; a control screw rod (126) is rotatably connected to the center of the top end surface of the control pressure plate (125); the control screw rod (126) is threadedly connected inside the support frame (124); two guide slide rods (127) are symmetrically and fixedly connected to the top end surface of the control pressure plate (125); the two guide slide rods (127) are aligned with the position of the control screw rod (126); the two guide slide rods (127) are both slidably connected inside the support frame (124).

7. The operating mechanism of a gate valve according to claim 1, characterized in that: A plurality of groups of limit posts (105) are fixedly connected to the bottom end surface of the mounting frame (104) in an annular array; the plurality of groups of limit posts (105) are respectively aligned with the positions of a plurality of groups of limit jacks (106); a plurality of groups of locking seats (107) are fixedly connected to the upper part of the gate valve cover (1) in an annular array; the ends of the plurality of groups of limit posts (105) are respectively inserted into the plurality of groups of locking seats (107).

8. The operating mechanism of a gate valve according to claim 7, characterized in that: A locking plug rod (108) is slidably connected inside each of the plurality of groups of locking seats (107); the plurality of groups of locking plug rods (108) are respectively inserted into the plurality of groups of limit posts (105); a connecting plate (109) is fixedly connected to the outside of each of the plurality of groups of locking plug rods (108); a connecting spring (110) is fixedly connected to the inner side of each of the plurality of groups of connecting plates (109); the ends of the plurality of groups of connecting springs (110) are respectively fixedly connected to the outside of the plurality of groups of locking seats (107).

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