Flat gate valve with flow guide hole

Abstract

The flat gate valve comprises a lower valve shell, an upper valve cover is fixed to the top end of the lower valve shell in a bolting mode, a valve column extending upwards is fixed to the top end of the upper valve cover, a gate plate is arranged in the lower valve shell, and two symmetrical racks are installed at the top end of the gate plate; a groove used for being embedded with the bottom end of the gate plate is formed in the bottom of the lower valve shell, and a lead screw driving assembly used for driving the gate plate to slide in the Z-axis direction is arranged in the valve column. The gate plate is driven to ascend and descend through the external thread valve rod so as to control the normally-open and normally-closed states of the valve body, meanwhile, the telescopic gear shaft is in power connection with the rack through the connecting rod self-locking type double-area power connection assembly, and therefore the cage cutter is driven to rotate by combining rotation of the bevel gear reversing transmission assembly and the vertical shaft; the self-cleaning function is synchronously achieved in the opening and closing process of the valve.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, in particular to a flat gate valve with a guide hole. Background Art

[0002] The flat gate valve with diversion holes is a valve designed for optimizing fluid flow. It is widely used in pipeline systems that require flow regulation and pressure control. Its main function is to improve fluid flow through diversion holes, reduce turbulence, local high pressure and cavitation, thereby reducing pressure loss; in terms of structure, the flat gate valve with diversion holes includes a valve body, a flat gate, a diversion hole, a valve seat, a sealing ring, a valve stem and a drive device. The diversion hole is usually designed on the surface of the flat plate to guide the fluid flow and optimize the flow rate and flow path. The valve body is made of pressure-resistant materials to ensure the strength and stability of the valve. The working principle is based on fluid mechanics. The diversion hole guides the fluid flow to make the flow rate more uniform, reduce turbulence and uneven flow, avoid cavitation and local excessive pressure, and ensure the normal operation of the valve. In addition, the diversion hole also helps to disperse the fluid pressure, reduce friction and wear, thereby enhancing the durability and sealing of the valve; For example, a high-pressure flat gate valve with a guide hole disclosed in the authorization announcement number CN219045581U includes an upper valve body and a lower valve body that are interconnected, an inlet pipe and an outlet pipe that are connected between the upper valve body and the lower valve body, a gate plate that is slidably connected to the upper valve body and the lower valve body and has a guide hole, a valve cover that is fixedly connected to the top surface of the upper valve body, and a valve stem that is threadedly connected to the valve cover and penetrates into the upper valve body. The lower end of the valve stem is rotatably connected to the top surface of the gate plate. A hydraulic adjustment component is connected between the inlet pipe and the lower valve body, which can adjust the amount of medium by using the high-pressure water pressure generated by the water hammer phenomenon when the gate plate is closed, and the medium can enhance the sealing effect between the lower valve body and the gate plate. It can be seen from the above that the existing flat gate valve technology and use methods are basically the same, that is, the flat gate plate forms a larger The flat plate has a flat structure, and the edge of the flat plate contacts the valve seat to achieve sealing. However, this type of flat gate valve is used in a high-impurity fluid medium environment. The fluid contains impurities such as sand, metal debris, and granular pollutants. These impurities are easy to adhere to the inner wall or guide hole of the valve during the flow of the fluid, especially in the front and back of the flat gate valve. Due to the changes in the fluid and the uneven distribution of the flow rate, impurities are easy to accumulate at the outlet and inlet of the fluid, and eventually form a blockage. At this time, the flange can only be removed, the valve body can be removed, and maintenance can be carried out. The disassembly and maintenance process requires a certain period of time, especially when there are many pipe and valve connection parts and the structure is complex, the maintenance cycle is often longer. For industrial production environments, long-term equipment downtime will affect the normal production progress. Summary of the invention

[0003] The object of the present invention is to provide a flat gate valve with a guide hole. When the gate is lifted and lowered by an externally threaded valve stem to control the normally open and normally closed states of the valve body, the staff connects the telescopic gear shaft with the rack power through a connecting rod self-locking dual-zone power coupling assembly. When the gate drives the rack to perform Z-axis lifting and lowering movement, the gate, the rack and the telescopic gear shaft force the bevel gear reversing transmission assembly and the vertical shaft to rotate. The vertical shaft drives the cage knife to rotate, and the cage knife is used to rotate on the left and right sides of the gate and break impurities, so that the flat gate valve can synchronously complete the self-cleaning and maintenance steps during the opening and closing operation to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a flat gate valve with a guide hole, comprising: A lower valve housing, the top end of which is bolted and fixed with an upper valve cover, and the top end of which is fixed with a valve column extending upward, a gate plate is arranged inside the lower valve housing, and two symmetrical racks are installed on the top end of the gate plate, a groove for engaging with the bottom end of the gate plate is arranged at the bottom of the lower valve housing, and a screw drive assembly for driving the gate plate to slide in the Z axis is arranged inside the valve column; A support plate, the support plate is fixed at one end inside the upper valve cover, a connecting rod self-locking dual-zone power engagement assembly is arranged on the outer wall of one side of the support plate, a right-angle shell is fixed on both the left and right outer walls of the upper valve cover, and a vertical shaft is rotatably installed inside the right-angle shell, the bottom end of the vertical shaft extends to the inside of the vertical shaft and is provided with a cage knife, a telescopic gear shaft for being towed by the connecting rod self-locking dual-zone power engagement assembly and for power engagement with the rack is arranged on one side inside the right-angle shell, and a bevel gear reversing transmission assembly for driving the vertical shaft to rotate is installed on the end of the telescopic gear shaft away from the rack.

[0005] Preferably, the screw drive assembly includes a stem nut sleeve rotatably installed at the opening position of the top end of the valve column and an externally threaded valve stem that cooperates with the internal thread of the stem nut sleeve, the bottom end of the externally threaded valve stem rotatably cooperates with the top end of the gate plate, a handwheel is fixed to the top end of the stem nut sleeve, and a locking nut concentric with the externally threaded valve stem is installed at the center position of the top end of the handwheel.

[0006] Preferably, right-angle arms are integrally formed on both sides of the top of the gate plate, a convex groove is formed between the two right-angle arms, a shaft sleeve is fixed to the bottom end of the externally threaded valve stem, and grooves are provided on the outer walls on both sides of the bearing. The two grooves are used to make the cross-sectional shape of the shaft sleeve form an I-shape, and the shaft sleeve is clamped with the convex groove between the two right-angle arms through the groove on the outer wall.

[0007] The effect achieved by the above components is that the external threaded valve stem, under the guidance of the valve stem nut sleeve in the upper valve cover, stably drives the gate plate to rise and fall; Preferably, the rack is located on a side of the right-angle arm away from the central axis of the externally threaded valve stem, and an upper concave cavity for the top end of the rack to enter is provided on the top of the upper valve cover.

[0008] Preferably, the connecting rod self-locking dual-zone power engagement assembly includes a main transmission shaft rotatably installed at one end of the inner part of the support plate, a turntable fixed at one end of the main transmission shaft, and a worm gear self-locking structure arranged at the other end of the main transmission shaft, and two symmetrical double-headed fisheye connecting rods are hinged on the outer wall of the turntable on the side away from the support plate, a cross bar is fixed inside the upper valve cover on one side of the support plate, and sliders are slidably installed at both ends of the surface of the cross bar, the back of the slider and one end of the double-headed fisheye connecting rod are hinged to each other, and an anti-slip sleeve for pulling the telescopic gear shaft to move is installed at the bottom end of the slider, and the double-headed fisheye connecting rod is used to drive the slider, the anti-slip sleeve, and the telescopic gear shaft to slide in the extension direction of the cross bar and enable the telescopic gear shaft and the rack to be dynamically engaged.

[0009] The effect achieved by the above components is: the main transmission shaft is driven to rotate through the worm gear self-locking structure, and the turntable and the main transmission shaft rotate synchronously. At this time, the rotational motion of the turntable is converted into the sliding motion of the slider through the double-headed fisheye connecting rod. At this time, the slider and the anti-slip sleeve are pulled by the double-headed fisheye connecting rod and slide in the extension direction of the cross bar, forcing the telescopic gear shaft to be dynamically engaged with the rack, so as to ensure that the opening and closing actions of the valve are more stable.

[0010] Preferably, the worm gear self-locking structure includes a worm gear unit fixed to the other end of the main transmission shaft and a worm shaft rotatably mounted at one end inside the upper valve cover, the worm shaft is meshed with the worm gear unit, and the end of the worm shaft away from the worm gear unit passes through the interior of the upper valve cover and is fixed with a knob.

[0011] The effect achieved by the above components is: the worm gear unit and the main transmission shaft are driven to rotate by the knob, and the position of the slider and the anti-dropping sleeve on the crossbar is locked by the self-locking function of the double-headed fisheye connecting rod and the worm shaft, ensuring the stable transmission of power between the telescopic gear shaft and the rack. Preferably, the telescopic gear shaft includes an internal spline shaft rotatably mounted at one end inside the right-angle housing, an external spline transmission shaft slidably mounted at one end inside the internal spline shaft, and a driven gear fixed at one end on the surface of the external spline transmission shaft, and the driven gear is used to engage with the rack when the external spline transmission shaft is pulled by an anti-slip sleeve.

[0012] Preferably, an annular flange is integrally formed on one end of the surface of the external spline transmission shaft, and an annular groove for the annular flange to be embedded is provided on the inner wall of the anti-dropout sleeve.

[0013] The effect achieved by the above components is: the annular flange at one end of the surface of the external spline transmission shaft and the annular groove inside the anti-slip sleeve are assembled, so that after the anti-slip sleeve drives the external spline transmission shaft to move, the anti-slip sleeve still assists the external spline transmission shaft and the driven gear to rotate.

[0014] Preferably, the bevel gear reversing transmission assembly consists of a short transition longitudinal shaft, a primary bevel gear transmission structure, and a secondary bevel gear transmission structure. The short transition longitudinal shaft is rotatably installed at one end inside the right-angle housing, the primary bevel gear transmission structure is arranged at the end where the short transition longitudinal shaft and the internal spline horizontal shaft are close to each other, the primary bevel gear transmission structure is arranged at the end where the short transition longitudinal shaft and the secondary bevel gear transmission structure are close to each other, and the internal spline horizontal shaft rotates through the primary bevel gear transmission structure, the short transition longitudinal shaft, the secondary bevel gear transmission structure and the vertical shaft in sequence.

[0015] Preferably, the cage knife comprises a plurality of hollow disks fixed at equal intervals on the outer peripheral surface of the vertical shaft and a plurality of arc-shaped blades welded at the outer edge positions of the hollow disks.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the flat gate valve with a guide hole realizes automatic cleaning of impurities during the opening and closing process of the valve through the synergistic effect of the external threaded valve stem, the connecting rod self-locking dual-zone power coupling assembly, the telescopic gear shaft, the bevel gear reversing transmission assembly, the vertical shaft, the cage cutter and other components, thereby improving the working efficiency of the valve, extending the service life, and reducing the maintenance cost; wherein the gate plate is driven to rise and fall by the external threaded valve stem to control the normally open and normally closed states of the valve body, and at the same time, the telescopic gear shaft is connected to the rack power by the connecting rod self-locking dual-zone power coupling assembly, thereby driving the cage cutter to rotate in combination with the rotation of the bevel gear reversing transmission assembly and the vertical shaft , the self-cleaning function is realized synchronously during the opening and closing process of the valve. As the cage cutter rotates, it will break up the impurities and sediments attached to the valve seat, guide holes and around the valve plate, avoiding the problem of valve blockage caused by impurity accumulation. This allows the valve to maintain an unobstructed fluid channel even when used in a fluid environment with a lot of impurities, reducing failures and downtime caused by impurity accumulation; and because the cage cutter effectively cleans the impurities accumulated inside the valve, the key components of the valve seat and gate will not be damaged prematurely due to the erosion of impurities, thereby improving the working efficiency of the valve and extending the service life of the valve, and reducing the frequency of maintenance and replacement of parts, thereby reducing maintenance costs; The self-cleaning flat gate valve can automatically clean impurities around the valve seat, guide holes and valve plate during the opening and closing process to ensure that the fluid channel of the valve is always unobstructed. Its automatic cleaning mechanism reduces the accumulation of impurities. On the one hand, it avoids the risk of unstable flow or failure of the valve to open and close normally due to blockage. On the other hand, the valve can simultaneously complete the removal of impurities during the opening and closing operation, eliminating the trouble of regular cleaning, saving a lot of time and labor costs, and optimizing the allocation of maintenance resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the main structure of the present invention; Figure 4 The three-dimensional structure of the present invention is shown in FIG. Figure 3 ; Figure 5 The three-dimensional cross-sectional structure of the present invention is schematically shown Figure 1 ; Figure 6 The three-dimensional cross-sectional structure of the present invention is schematically shown Figure 2 ; Figure 7 It is a schematic diagram of the three-dimensional structure of the gate plate of the second embodiment of the present invention; Figure 8 Schematic diagram of the three-dimensional structure of the connecting rod self-locking dual-zone power joint assembly of the third embodiment of the present invention Figure 1 ; Fig. 9 Schematic diagram of the three-dimensional structure of the connecting rod self-locking dual-zone power joint assembly of the third embodiment of the present invention Figure 2 ; Fig.10 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Fig.11 Schematic diagram of the three-dimensional structure of the cage knife of the fourth embodiment of the present invention Figure 1 ; Fig.12 Schematic diagram of the three-dimensional structure of the cage knife of the fourth embodiment of the present invention Figure 2 .

[0018] In the figure: 1, lower valve housing; 2, upper valve cover; 3, valve column; 4, valve stem nut sleeve; 5, hand wheel; 6, external thread valve stem; 7, gate; 8, support plate; 801, cross bar; 9, right angle housing; 10, cage knife; 11, vertical shaft; 12, bevel gear reversing transmission assembly; 1201, short transition longitudinal shaft; 1202, primary bevel gear transmission structure; 1203, secondary bevel gear transmission structure; 13, extension Reduced gear shaft; 1301, internal spline horizontal shaft; 1302, external spline transmission shaft; 1303, driven gear; 14, connecting rod self-locking dual-zone power coupling assembly; 1401, main transmission shaft; 1402, turntable; 1403, worm gear unit; 1404, worm shaft; 1405, knob; 1406, slider; 1407, anti-drop sleeve; 1408, double-headed fisheye connecting rod; 15, rack. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. 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.

[0020] Embodiment 1, by Figures 1 to 6 The present invention comprises a lower valve housing 1, an upper valve cover 2 is bolted and fixed to the top of the lower valve housing 1, and a valve column 3 extending upward is fixed to the top of the upper valve cover 2, a gate plate 7 is arranged inside the lower valve housing 1, and two symmetrical racks 15 are installed on the top of the gate plate 7, a groove for engaging with the bottom end of the gate plate 7 is arranged at the bottom of the lower valve housing 1, and a screw drive assembly for driving the gate plate 7 to slide in the Z axis is arranged inside the valve column 3; Support plate 8, support plate 8 is fixed at one end inside the upper valve cover 2, a connecting rod self-locking dual-zone power engagement assembly 14 is arranged on one side outer wall of the support plate 8, right angle shell 9 is fixed on both left and right outer walls of the upper valve cover 2, and a vertical shaft 11 is rotatably installed inside the right angle shell 9, the bottom end of the vertical shaft 11 extends to the inside of the vertical shaft 11 and is provided with a cage knife 10, a telescopic gear shaft 13 for being pulled by the connecting rod self-locking dual-zone power engagement assembly 14 and for power engagement with the rack 15 is arranged on one side inside the right angle shell 9, and a bevel gear reversing transmission assembly 12 for driving the vertical shaft 11 to rotate is installed at one end of the telescopic gear shaft 13 away from the rack 15; The setting of the connecting rod self-locking dual-zone power engagement assembly 14 allows the staff to adjust the operating conditions of the valve according to actual needs, and control whether to start the self-cleaning maintenance function while improving the switching efficiency; and the connecting rod self-locking dual-zone power engagement assembly 14 allows the two symmetrical telescopic gear shafts 13 to be dynamically engaged with the corresponding racks 15; and the bevel gear reversing transmission assembly 12 plays the role of regulating the gear movement and power steering during the opening and closing process of the valve, ensuring that the valve is more stable during the closing process; When the valve is not cleaned, the staff operates the connecting rod self-locking dual-zone power coupling assembly 14 to actively disconnect the power connection between the telescopic gear shaft 13 and the rack 15. Then, the driving force generated by the lifting and lowering action of the external threaded valve stem 6, the gate plate 7, and the rack 15 will not be transmitted to the telescopic gear shaft 13, the bevel gear reversing transmission assembly 12, and the vertical shaft 11, so that the lifting and lowering action of the gate plate 7 no longer drives the cage knife 10 to rotate; The screw drive assembly includes a valve stem nut sleeve 4 rotatably installed at the top opening position of the valve column 3 and an externally threaded valve stem 6 that cooperates with the internal thread of the valve stem nut sleeve 4. The bottom end of the externally threaded valve stem 6 rotatably cooperates with the top of the gate plate 7. A handwheel 5 is fixed to the top of the valve stem nut sleeve 4. A locking nut that is concentric with the externally threaded valve stem 6 is installed at the center position of the top of the handwheel 5. The staff rotates the handwheel 5 and uses the handwheel 5 to drive the valve stem nut sleeve 4 to rotate on the top of the upper valve cover 2. The externally threaded valve stem 6 interacts with the valve stem nut sleeve 4 in the upper valve cover 2, forcing the externally threaded valve stem 6 to move up and down, thereby driving the gate plate 7 to rise and fall.

[0021] Embodiment 2, based on embodiment 1, Figure 6 and Figure 7 It is given that both sides of the top of the gate plate 7 are integrally formed with right-angle arms, a convex groove is formed between the two right-angle arms, a shaft sleeve is fixed to the bottom end of the external threaded valve stem 6, and grooves are provided on the outer walls on both sides of the bearing. The two grooves are used to make the cross-sectional shape of the shaft sleeve form an I-shape, and the shaft sleeve is clamped with the convex groove between the two right-angle arms through the groove on the outer wall; The rack 15 is located on the side of the right-angle arm away from the central axis of the externally threaded valve stem 6. The top of the upper valve cover 2 is provided with an upper concave cavity for the top end of the rack 15 to enter. The sealing structure design in the prior art solution is adopted between the lower valve shell 1 and the upper valve cover 2 to ensure that the fluid does not leak. The externally threaded valve stem 6, under the guidance of the valve stem nut sleeve 4 in the upper valve cover 2, stably drives the gate plate 7 to rise and fall. When the gate plate 7 is gradually lifted, the fluid channel in the lower valve shell 1 is opened, and the fluid begins to flow.

[0022] Embodiment 3, based on embodiment 2, Figure 8 , Fig. 9 and Fig.10 It is given that the connecting rod self-locking dual-zone power coupling assembly 14 includes a main transmission shaft 1401 rotatably mounted at one end of the support plate 8, a turntable 1402 fixed at one end of the main transmission shaft 1401, and a worm gear self-locking structure arranged at the other end of the main transmission shaft 1401. Two symmetrical double-headed fisheye connecting rods 1408 are hinged on the outer wall of the turntable 1402 away from the support plate 8. A cross bar 801 is fixed inside the upper valve cover 2 on one side of the support plate 8, and the cross bar 801 has a surface. Slide blocks 1406 are slidably installed at both ends of the surface, the back of the slide block 1406 is hinged to one end of a double-headed fisheye connecting rod 1408, and an anti-slip sleeve 1407 for pulling the telescopic gear shaft 13 to move is installed at the bottom end of the slide block 1406. The double-headed fisheye connecting rod 1408 is used to drive the slide block 1406, the anti-slip sleeve 1407, and the telescopic gear shaft 13 to slide in the extension direction of the cross bar 801 and make the telescopic gear shaft 13 and the rack 15 dynamically engaged; The worm gear self-locking structure includes a worm gear monomer 1403 fixed at the other end of the main transmission shaft 1401 and a worm shaft 1404 rotatably installed at one end inside the upper valve cover 2. The worm shaft 1404 is meshed with the worm gear monomer 1403. One end of the worm shaft 1404 away from the worm gear monomer 1403 passes through the interior of the upper valve cover 2 and is fixed with a knob 1405. The worm gear monomer 1403 and the main transmission shaft 1401 are driven to rotate by the knob 1405. The self-locking function of the double-headed fisheye connecting rod 1408 and the worm shaft 1404 is used to lock the position of the slider 1406 and the anti-dropping sleeve 1407 on the cross bar 801, thereby ensuring the stable transmission of power between the telescopic gear shaft 13 and the rack 15. When operating the connecting rod self-locking dual-zone power coupling assembly 14 during the valve cleaning stage, the staff manually turns the knob 1405, and the knob 1405 drives the main transmission shaft 1401 to rotate through the worm gear self-locking structure, then the turntable 1402 rotates synchronously with the main transmission shaft 1401, and at this time, the rotational motion of the turntable 1402 is converted into the sliding motion of the slider 1406 through the double-headed fisheye connecting rod 1408, and at this time, the slider 1406 and the anti-slip sleeve 1407 are pulled by the double-headed fisheye connecting rod 1408 and slide in the extension direction of the cross bar 801, so as to force the telescopic gear shaft 13 to be dynamically engaged with the rack 15, so as to ensure that the opening and closing actions of the valve are more stable, and the power generated by the lifting and lowering of the gate plate 7 is synchronously transmitted to the telescopic gear shaft 13, the bevel gear reversing transmission assembly 12, the cage knife 10, and the vertical shaft 11; The telescopic gear shaft 13 includes an internal spline horizontal shaft 1301 rotatably mounted at one end inside the right-angle housing 9, an external spline transmission shaft 1302 slidably mounted at one end inside the internal spline horizontal shaft 1301, and a driven gear 1303 fixed at one end on the surface of the external spline transmission shaft 1302. The driven gear 1303 is used to mesh with the rack 15 when the external spline transmission shaft 1302 is pulled by the anti-dropping sleeve 1407. When the slider 1406 and the anti-dropping sleeve 1407 approach the central axis direction of the main transmission shaft 1401, the anti-dropping sleeve 1407 will drive the external spline transmission shaft 1302 and the driven gear 1303 to gradually move away from the internal spline horizontal shaft 1301 until the driven gear 1303 and the rack 15 enter into a meshing state. Then, when the rack 15 is raised or lowered, the driven gear 1303 will drive the external spline transmission shaft 1302 and the internal spline horizontal shaft 1301 to rotate and transmit power to the bevel gear reversing transmission assembly 12 and the vertical shaft 11. An annular flange is integrally formed at one end of the surface of the external spline transmission shaft 1302, and an annular groove for the annular flange to be embedded is provided on the inner wall of the anti-slip sleeve 1407. The annular flange at one end of the surface of the external spline transmission shaft 1302 and the annular groove inside the anti-slip sleeve 1407 are assembled, so that after the anti-slip sleeve 1407 drives the external spline transmission shaft 1302 to move, the anti-slip sleeve 1407 still assists the external spline transmission shaft 1302 and the driven gear 1303 to rotate.

[0023] Embodiment 4, based on embodiment 3, Fig.10 , Fig.11 and Fig.12 It is given that the bevel gear reversing transmission assembly 12 is composed of a short transition longitudinal shaft 1201, a primary bevel gear transmission structure 1202, and a secondary bevel gear transmission structure 1203. The short transition longitudinal shaft 1201 is rotatably mounted at one end inside the right-angle housing 9, and the primary bevel gear transmission structure 1202 is arranged at the end where the short transition longitudinal shaft 1201 and the internal spline horizontal shaft 1301 are close to each other. The primary bevel gear transmission structure 1202 is arranged at the end where the short transition longitudinal shaft 1201 and the secondary bevel gear transmission structure 1203 are close to each other, and the internal spline horizontal shaft 1301 passes through the primary bevel gear transmission structure 1202 in sequence. , the short transition longitudinal shaft 1201, the secondary bevel gear transmission structure 1203 and the vertical shaft 11 rotate, and after the internal spline horizontal shaft 1301 receives the rotary power from the external spline transmission shaft 1302, the internal spline horizontal shaft 1301 and the short transition longitudinal shaft 1201 are powered by the primary bevel gear transmission structure 1202, and the short transition longitudinal shaft 1201 drives the vertical shaft 11 to rotate by itself through the secondary bevel gear transmission structure 1203. At this time, the bevel gear reversing transmission assembly 12 optimizes the operating effect of the valve by changing the bevel gear transmission direction and the rotation angle, so as to enable the cage cutter 10 to rotate; The vertical shaft 11 is rotatably mounted inside the right-angle housing 9, and the outer peripheral surface of the vertical shaft 11 is integrally formed with a convex edge that matches the concave surface of the inner wall of the right-angle housing 9. At this time, the vertical structure of the vertical shaft 11 can provide uniform power transmission, avoiding the uneven torque phenomenon that may occur in traditional shaft transmission, so that the cage knife 10 can rotate stably; The cage knife 10 includes a plurality of hollow disks fixed at equal intervals on the outer peripheral surface of the vertical shaft 11 and a plurality of arc-shaped blades welded at the outer edge positions of the hollow disks. The hollow disks in the cage knife 10 form a stable frame, and the arc-shaped blades are welded to the outer edges of the plurality of hollow disks. At this time, the rotating arc-shaped blades can crush and remove solid impurities attached to the lower valve housing 1 and around the gate plate 7, ensuring that the valve channel remains unobstructed and avoids blockage, and effectively avoiding valve failure due to accumulation of pollutants, thereby extending the service life of the valve.

[0024] When the embodiment of the present application is used, first, the lower valve housing 1 in the gate valve is installed in the fluid pipeline in a bolted and fixed manner through a flange. After the installation is completed, ensure that the components on the valve, such as the valve housing 1, the upper valve cover 2, the valve stem nut sleeve 4, the externally threaded valve stem 6, and the cage knife 10, are not damaged, and the relevant cleaning functions and assembly structures have been preliminarily inspected and are working normally; the opening and closing process of the flat gate valve is completed by the operator through the hand wheel 5. At this time, the staff rotates the hand wheel 5, and uses the hand wheel 5 to drive the valve stem nut sleeve 4 to rotate on the top of the upper valve cover 2, and the externally threaded valve stem 6 interacts with the valve stem nut sleeve 4 in the upper valve cover 2. The external threaded valve stem 6 is used to move up and down, thereby driving the lifting and lowering action of the gate plate 7. For example, when the hand wheel rotates, the staff operates clockwise or counterclockwise to open the valve according to actual needs; when realizing the self-cleaning and maintenance function of the flat gate valve, the staff operates the connecting rod self-locking dual-zone power engagement assembly 14 according to the cleaning and maintenance needs, and uses the connecting rod self-locking dual-zone power engagement assembly 14 to force the two telescopic gear shafts 13 on the left and right sides of the upper valve cover 2 to deform synchronously, until the telescopic gear shaft 13 is dynamically engaged with the rack 15, so as to provide a rotation action for the subsequent cage knife 10. Smooth opening and closing power. During the opening and closing process of the flat gate valve, the gate plate 7 generates a lifting movement. At this time, the lifting movement of the gate plate 7 drives the vertical shaft 11 to rotate through the telescopic gear shaft 13 and the bevel gear reversing transmission assembly 12, and the rotation of the vertical shaft 11 drives the cage knife 10 to rotate. The cage knife 10 rotates on one side of the gate plate 7 to clean the impurities inside the lower valve shell 1. Since there is a rotating cage knife 10 on both sides of the gate plate 7, the cage knife 10 uses mechanical force to crush the solid impurities attached to the inside of the lower valve shell 1 and around the gate plate 7, especially the larger particles, thereby avoiding Impurities continue to accumulate and cause valve blockage, ensuring that the valve always remains unobstructed; taking the closing of the flat gate valve as an example, the staff continues to rotate the hand wheel 5 in the reverse direction to drive the external threaded valve stem 6 to move downward, so that the gate plate 7 gradually contacts the bottom of the lower valve shell 1 until the fluid channel of the lower valve shell 1 is completely closed. While the valve is closed, the connecting rod self-locking dual-zone power engagement assembly 14 still keeps the telescopic gear shaft 13 and the rack 15 powered. The cage knife 10 continues to rotate to remove impurities attached to the lower valve shell 1 and the gate plate 7, ensuring that these components are free of any blockages after closing to prevent leakage and failure.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Flat gate valve with diversion hole, characterized by: include: A lower valve housing (1), wherein an upper valve cover (2) is bolted and fixed to the top of the lower valve housing (1), and a valve column (3) extending upward is fixed to the top of the upper valve cover (2), a gate plate (7) is arranged inside the lower valve housing (1), and two symmetrical racks (15) are installed on the top of the gate plate (7), a groove for engaging with the bottom end of the gate plate (7) is arranged at the bottom of the lower valve housing (1), and a screw drive assembly for driving the gate plate (7) to slide in the Z axis is arranged inside the valve column (3); A support plate (8), wherein the support plate (8) is fixed to one end inside the upper valve cover (2), a connecting rod self-locking dual-zone power engagement assembly (14) is arranged on one side outer wall of the support plate (8), a right-angle housing (9) is fixed to both left and right outer walls of the upper valve cover (2), and a vertical shaft (11) is rotatably mounted inside the right-angle housing (9), the bottom end of the vertical shaft (11) extends to the inside of the vertical shaft (11) and is provided with a cage knife (10), a telescopic gear shaft (13) for being pulled by the connecting rod self-locking dual-zone power engagement assembly (14) and for power engagement with a rack (15) is arranged on one side inside the right-angle housing (9), and a bevel gear reversing transmission assembly (12) for driving the vertical shaft (11) to rotate is installed on one end of the telescopic gear shaft (13) away from the rack (15).

2. The flat gate valve with guide holes according to claim 1 is characterized in that: The screw drive assembly comprises a valve stem nut sleeve (4) rotatably mounted at the top opening position of the valve column (3) and an externally threaded valve stem (6) engaged with the internal thread of the valve stem nut sleeve (4), the bottom end of the externally threaded valve stem (6) rotatably engages with the top end of the gate plate (7), a hand wheel (5) is fixed to the top end of the valve stem nut sleeve (4), and a locking nut concentric with the externally threaded valve stem (6) is mounted at the center position of the top end of the hand wheel (5).

3. The flat gate valve with guide holes according to claim 2 is characterized in that: Both sides of the top of the gate plate (7) are integrally formed with right-angle arms, and a convex groove is formed between the two right-angle arms. A shaft sleeve is fixed to the bottom end of the externally threaded valve stem (6), and grooves are provided on the outer walls on both sides of the bearing. The two grooves are used to make the cross-sectional shape of the shaft sleeve form an I-shape. The shaft sleeve is clamped with the convex groove between the two right-angle arms through the groove on the outer wall.

4. The flat gate valve with guide holes according to claim 3 is characterized in that: The rack (15) is located on a side of the right-angle arm away from the central axis of the externally threaded valve stem (6), and an upper concave cavity for the top end of the rack (15) to enter is provided on the top of the upper valve cover (2).

5. The flat gate valve with guide holes according to claim 4 is characterized in that: The connecting rod self-locking dual-zone power coupling assembly (14) comprises a main transmission shaft (1401) rotatably mounted on one end of the interior of a support plate (8), a rotating disk (1402) fixed at one end of the main transmission shaft (1401), and a worm gear self-locking structure arranged at the other end of the main transmission shaft (1401), wherein two symmetrical double-headed fisheye connecting rods (1408) are hingedly connected to the outer wall of the rotating disk (1402) away from the support plate (8), and a cross bar (801) is fixed inside the upper valve cover (2) on one side of the support plate (8), and the cross bar (801) has a surface Both ends of the surface are slidably mounted with a slider (1406), the back of the slider (1406) is hinged to one end of a double-headed fisheye connecting rod (1408), and the bottom end of the slider (1406) is mounted with an anti-slip sleeve (1407) for pulling the telescopic gear shaft (13) to move, and the double-headed fisheye connecting rod (1408) is used to drive the slider (1406), the anti-slip sleeve (1407), and the telescopic gear shaft (13) to slide in the extension direction of the cross bar (801) and enable the telescopic gear shaft (13) and the rack (15) to be dynamically engaged.

6. The flat gate valve with guide holes according to claim 5, characterized in that: The worm gear self-locking structure comprises a worm gear unit (1403) fixed to the other end of the main transmission shaft (1401) and a worm shaft (1404) rotatably mounted at one end inside the upper valve cover (2); the worm shaft (1404) is meshed with the worm gear unit (1403); one end of the worm shaft (1404) away from the worm gear unit (1403) passes through the interior of the upper valve cover (2) and is fixed with a knob (1405).

7. The flat gate valve with guide holes according to claim 5, characterized in that: The telescopic gear shaft (13) comprises an internal spline horizontal shaft (1301) rotatably mounted at one end inside the right-angle housing (9), an external spline transmission shaft (1302) slidably mounted at one end inside the internal spline horizontal shaft (1301), and a driven gear (1303) fixed at one end on the surface of the external spline transmission shaft (1302); the driven gear (1303) is used to mesh with the rack (15) when the external spline transmission shaft (1302) is pulled by the anti-dropout sleeve (1407).

8. The flat gate valve with guide holes according to claim 7 is characterized in that: An annular flange is integrally formed on one end of the surface of the external spline transmission shaft (1302), and an annular groove for the annular flange to be embedded is provided on the inner wall of the anti-slip sleeve (1407).

9. The flat gate valve with guide holes according to claim 7, characterized in that: The bevel gear reversing transmission assembly (12) is composed of a short transition longitudinal shaft (1201), a primary bevel gear transmission structure (1202), and a secondary bevel gear transmission structure (1203); the short transition longitudinal shaft (1201) is rotatably mounted at one end inside the right-angle housing (9); the primary bevel gear transmission structure (1202) is arranged at an end where the short transition longitudinal shaft (1201) and the internal spline horizontal shaft (1301) are close to each other; the primary bevel gear transmission structure (1202) is arranged at an end where the short transition longitudinal shaft (1201) and the secondary bevel gear transmission structure (1203) are close to each other; the internal spline horizontal shaft (1301) rotates in sequence through the primary bevel gear transmission structure (1202), the short transition longitudinal shaft (1201), the secondary bevel gear transmission structure (1203), and the vertical shaft (11).

10. The flat gate valve with guide holes according to claim 9, characterized in that: The cage knife (10) comprises a plurality of hollow disks fixed at equal intervals on the outer peripheral surface of the vertical shaft (11) and a plurality of arc-shaped blades welded at the outer edge positions of the hollow disks.

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