Gate valve convenient to disassemble and maintain and using method thereof

Abstract

The invention relates to a gate valve convenient to disassemble and maintain and a using method thereof, and relates to the technical field of gate valves, the gate valve comprises a valve body, a valve cover, a gate plate, two valve seats, a mounting mechanism and a driving mechanism, the valve body is provided with a water inlet, a water outlet, a drain outlet and a mounting port, and the valve cover is fixedly arranged on the valve body and used for blocking the mounting port; the valve body is further in bolted connection with a sewage draining cover, the sewage draining cover is used for blocking the sewage draining outlet, the valve seats are symmetrically arranged in the valve body, the gate plate is arranged in the valve body, the two faces of the gate plate abut against the two valve seats respectively to seal and separate the water inlet pipe and the water outlet pipe, and the installation mechanism is arranged in the valve body and used for installing and fixing the two valve seats. The driving mechanism is arranged on the valve deck and used for driving the flashboard to move up and down. A worker is allowed to directly replace the damaged valve seat through the drain outlet, so that the worker does not need to take down other parts of the gate valve from the valve body firstly and then replace the valve seat through the mounting port, and the operation process of replacing the valve seat of the gate valve can be simplified.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, and in particular to a gate valve which is easy to disassemble and maintain and a use method thereof. Background Art

[0002] The gate valve is a gate plate of an opening and closing part. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate has a rigid gate plate and an elastic gate plate. According to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve.

[0003] The gate valve in the prior art has an installation port on the top of the gate valve body. When installing the gate valve, the valve seat is first installed inside the valve body through the installation port, and then the valve cover, valve stem, gate plate and other parts are assembled and the valve cover is installed on the valve body with bolts. When the gate valve is opened and closed, friction will occur between the gate plate and the valve seat. After the gate valve has been used for a long time, the valve seat may be greatly worn, causing the gate valve to leak, so that the valve seat needs to be replaced. At this time, it is necessary to first remove the valve cover, valve stem, gate plate and other parts from the gate plate, and then replace the valve seat through the installation port. After the replacement is completed, the above-mentioned parts are installed back on the valve body. The operation is relatively cumbersome, especially for large gate valves, which also need to be operated with professional lifting equipment, which consumes a lot of manpower and material resources. Summary of the invention

[0004] In order to simplify the operation of replacing a gate valve seat, the present application provides a gate valve that is easy to disassemble and maintain and a method for using the same.

[0005] In a first aspect, the present invention provides a gate valve that is easy to disassemble and maintain. The gate valve that is easy to disassemble and maintain includes a valve body, a valve cover, a gate plate, two valve seats, a mounting mechanism and a driving mechanism. The valve body is provided with a water inlet, a water outlet, a sewage outlet and a mounting port. The valve cover is fixedly arranged on the valve body for sealing the mounting port. The valve body is also bolted with a sewage outlet cover, which is used to seal the sewage outlet. The valve seats are symmetrically arranged inside the valve body. The gate plate is arranged inside the valve body. The two sides of the gate plate are respectively abutted against the two valve seats to form a seal to separate the water inlet and the water outlet. The mounting mechanism is arranged inside the valve body for installing and fixing the two valve seats. The driving mechanism is arranged on the valve cover for driving the gate plate to move up and down.

[0006] From the above, it can be seen that when the valve seat needs to be replaced, the staff can control the gate plate to move to the highest point and separate from the valve seat through the driving mechanism, then remove the drain cover from the valve body, and then take out the valve seat to be replaced from the valve body through the drain port, and then put the new valve seat back into the valve body and fix the valve seat through the installation mechanism, and then install the drain cover back to its original place, so that there is no need to remove other parts of the gate valve from the valve body and then replace the valve seat through the installation port, which can simplify the operating process of replacing the gate valve seat.

[0007] The above-mentioned technical solution in the embodiment of the present application has at least the following technical effects: the staff can directly replace the damaged valve seat through the sewage outlet, without having to remove other parts of the gate valve from the valve body and then replace the valve seat through the installation port, which can simplify the operating procedure of replacing the gate valve seat.

[0008] In some embodiments, the installation mechanism includes a clamping sleeve, a clamping ring, a sealing ring and a fixing assembly, the clamping sleeve is fixedly arranged inside the valve body, the clamping ring is fixedly arranged on the end of the valve seat away from the gate plate, a sealing groove is opened inside the valve body, the sealing ring is arranged inside the sealing groove, the clamping ring is clamped inside the clamping sleeve, and the fixing assembly is used to continuously apply force to the valve seat to make it close to the clamping sleeve so that the clamping ring is clamped inside the clamping sleeve, and one side of the sealing ring abuts against the valve seat to form a seal.

[0009] In some embodiments, the fixing assembly includes a Y-shaped bracket and two abutment blocks, wherein the Y-shaped bracket is fixedly arranged on a surface of the drain cover close to the gate plate, and the abutment blocks are respectively fixedly arranged on one end of the two valve seats close to the drain cover, and an inclined surface is provided on the end of the abutment block close to the drain cover, and the height of the inclined surface gradually increases in the direction close to the gate plate, and an inclined surface is provided on the end of the Y-shaped bracket away from the drain cover, which matches the inclined surface provided on the abutment block, and the Y-shaped bracket abuts against the abutment block through the two inclined surfaces.

[0010] In some embodiments, the driving mechanism includes a valve stem, a valve stem bracket and a first threaded sleeve. The valve stem bracket is fixedly arranged on a side of the valve cover away from the valve body. The first threaded sleeve is rotatably arranged on an end of the valve stem bracket away from the valve cover. One end of the valve stem passes through the first threaded sleeve, the valve stem bracket and the valve cover in sequence and is fixedly connected to the gate plate. The outer peripheral surface of the valve stem is threadedly connected to the first threaded sleeve.

[0011] In some embodiments, the driving mechanism also includes a first guide assembly for limiting the rotation of the valve stem, the first guide assembly includes a first guide bar, the first guide bar is fixedly disposed on the valve cover, a first guide groove is opened on the outer peripheral surface of the valve stem, and the first guide bar is slidably connected inside the first guide groove.

[0012] In some embodiments, the driving mechanism also includes a connecting assembly, which is used to connect the valve stem and the gate plate; the connecting assembly includes a connecting sleeve, a mounting head, a plurality of clamping blocks and a control assembly, the connecting sleeve is fixedly arranged on one end of the gate plate close to the valve cover, an opening is provided on a side of the connecting sleeve away from the gate plate, one end of the valve stem close to the gate plate passes through the opening and is located inside the connecting sleeve, the mounting head is bolted to one end of the valve stem close to the gate plate, a plurality of mounting grooves are provided on the mounting head, the clamping block is rotatably arranged inside the mounting groove, one side of the clamping block abuts against the connecting sleeve, the control assembly is used to keep the valve stem against the gate plate so as to cooperate with the clamping block to fix one end of the valve stem to the gate plate, and the control assembly can also control the rotation of the clamping block to connect or separate the clamping block from the connecting sleeve.

[0013] In some embodiments, the control assembly includes an inner rod, a driving member, a limiting member, a rotating shaft, an elastic member and a positioning block. The valve stem and the mounting head are both hollow structures. One end of the inner rod passes through the valve stem and the mounting head in sequence and abuts against the gate plate. The positioning block is fixedly arranged on the end of the gate plate close to the valve stem. A positioning groove is provided at the end of the inner rod close to the gate plate. The positioning block is clamped in the positioning groove. The rotating shaft is fixedly connected to the mounting groove. The clamping blocks are all rotatably connected to the rotating shaft. The elastic member is provided on the rotating shaft, which is used to apply elastic force to the clamping block so that the end abutting against the connecting sleeve rotates and separates from the connecting sleeve. A circumferential surface is provided at the end of the clamping block close to the inner rod, which matches the outer circumferential surface of the inner rod. The clamping block abuts against the outer circumferential surface of the inner rod through the circumferential surface. The driving member is used to drive the inner rod to move up and down relative to the valve stem. The limiting member is used to limit the rotation of the inner rod relative to the valve stem.

[0014] In some embodiments, one end of the connecting sleeve is bolted to the gate plate; the elastic member includes a torsion spring, which is sleeved on the rotating shaft, one end of the torsion spring abuts against the mounting head, and the other end of the torsion spring abuts against the clamping block, and the driving member includes a second threaded sleeve, which is rotatably set on the end of the valve stem away from the gate plate, the inner rod passes through the second threaded sleeve and is threadedly connected to the second threaded sleeve, and hand wheels are fixedly set on the first threaded sleeve and the second threaded sleeve.

[0015] In some embodiments, the limit member includes a second guide strip, the second guide strip is fixedly disposed on the inner circumference of the valve stem, a second guide groove is formed on the outer circumference of the inner stem, and the second guide strip is slidably connected inside the second guide groove.

[0016] In a second aspect, the present invention provides a method for using a gate valve that is easy to disassemble and repair. The method for using a gate valve that is easy to disassemble and repair comprises the following steps: S1: When the valve seat needs to be replaced, use the handwheel to turn the first threaded sleeve to drive the gate plate to move up, and then remove the drain cover from the valve body; S2: Pull down the valve seat to be replaced, remove the valve seat from the drain port, press the side of the new valve seat close to the clamping ring on the inner surface of the valve body, and then push the valve seat to move close to the valve body so that one side of the clamping ring is clamped into the inside of the clamping sleeve, install the drain cover back on the valve body, and tighten the bolts connecting the drain cover and the valve body; S3: When the gate needs to be replaced, the first threaded sleeve is screwed by the handwheel to drive the gate to move up, and then the drain cover and the two valve seats are removed from the valve body; S4: Use the hand wheel to turn the second threaded sleeve to drive the inner rod to move up to the highest point, remove the gate from the valve stem and take it out from the sewage outlet; S5: Move the new gate through the sewage outlet into the valve body, insert the installation head into the connecting sleeve, turn the second threaded sleeve by the hand wheel to drive the inner rod to move downward, make the positioning block at the bottom of the inner rod contact, then adjust the gate position so that the positioning block is inserted into the positioning groove, and continue to turn the hand wheel to drive the inner rod to move downward until it is tightened; S6: Install the two valve seats and drain cover back to their original positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the overall structure of a gate valve that is easy to disassemble and maintain provided in an embodiment of the present application; Figure 2 for Figure 1 Enlarged view of part A; Figure 3 for Figure 1 Enlarged view of part B; Figure 4 A cross-sectional view of a gate valve that is easy to disassemble and maintain provided in an embodiment of the present application; Figure 5 for Figure 4 Enlarged view of part C in the middle; Figure 6 for Figure 4 Enlarged view of part D in the middle; Figure 7 is a cross-sectional view of the valve body; Figure 8 for Figure 7 Enlarged view of part E in the middle; Fig. 9 It is a partial structural schematic diagram of the valve stem, inner rod and connecting components; Fig.10 for Fig. 9 Enlarged view of part F in the middle; Fig.11 It is a schematic diagram of the overall structure of the mounting head; Fig.12 It is a schematic diagram of the overall structure of the card connection block; Fig.13 It is a partial structural schematic diagram of the valve stem, the inner rod and the second guide strip.

[0019] Among them, the reference numerals in the figure are: 1. Valve body; 11. Water inlet; 12. Water outlet; 13. Drain outlet; 14. Mounting port; 15. Drain cover; 16. Sealing groove; 2. Valve cover; 3. Gate; 4. Valve seat; 51. Snap sleeve; 52. Snap ring; 53. Sealing ring; 541. Y-type bracket; 542. Abutment block; 61. Valve stem; 611. First guide groove; 62. Valve stem bracket; 63. First threaded sleeve; 64. First guide strip; 71. Connecting sleeve; 711. Opening; 72. Mounting head; 721. Mounting groove; 73. Snap block; 731. Circumferential surface; 74. Positioning block; 81. Inner rod; 811. Second guide groove; 812. Positioning groove; 82. Second threaded sleeve; 821. Hand wheel; 83. Second guide strip; 84. Rotating shaft; 85. Torsion spring. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] 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 this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0022] According to the existing technology, when replacing the valve seat of the gate valve, it is necessary to first remove the valve cover, valve stem, gate plate and other parts from the gate plate, and then replace the valve seat through the installation port. After the replacement is completed, the above-mentioned parts are installed back on the valve body, which is a cumbersome operation.

[0023] Based on this, in order to simplify the operation process when replacing the valve seat of the gate valve, the embodiment of the present application provides the following solution.

[0024] Example 1: Please refer to Figures 1 to 5 The embodiment of the present application provides a gate valve that is easy to disassemble and maintain. The gate valve that is easy to disassemble and maintain includes a valve body 1, a valve cover 2, a gate plate 3, two valve seats 4, a mounting mechanism and a driving mechanism. The valve body 1 is provided with a water inlet 11, a water outlet 12, a sewage outlet 13 and a mounting port 14. The valve cover 2 is fixedly arranged on the valve body 1 for blocking the mounting port 14. The valve body 1 is also bolted with a sewage cover 15, and the sewage cover 15 is used to block the sewage outlet 13. The valve seats 4 are symmetrically arranged inside the valve body 1, and the gate plate 3 is arranged inside the valve body 1. The two sides of the gate plate 3 are respectively abutted against the two valve seats 4 to form a seal to separate the water inlet 11 and the water outlet 12. The mounting mechanism is arranged inside the valve body 1 for installing and fixing the two valve seats 4. The driving mechanism is arranged on the valve cover 2 for driving the gate plate 3 to move up and down.

[0025] From the above, it can be seen that when the valve seat 4 needs to be replaced, the staff can control the gate plate 3 to move to the highest point and separate from the valve seat 4 through the driving mechanism, and then remove the drain cover 15 from the valve body 1, and then take out the valve seat 4 to be replaced from the valve body 1 through the drain port 13, and then put the new valve seat 4 back into the valve body 1 and fix the valve seat 4 through the installation mechanism, and then install the drain cover 15 back to its original place, so that there is no need to remove other parts of the gate valve from the valve body 1 and then replace the valve seat 4 through the installation port 14, which can simplify the operating procedure of replacing the gate valve seat 4.

[0026] In some embodiments, please refer to Figures 4 to 6 The installation mechanism includes a clamping sleeve 51, a clamping ring 52, a sealing ring 53 and a fixing assembly. The clamping sleeve 51 is fixedly arranged inside the valve body 1, and the clamping ring 52 is fixedly arranged on the end of the valve seat 4 away from the gate plate 3. A sealing groove 16 is opened inside the valve body 1, and the sealing ring 53 is arranged inside the sealing groove 16. The clamping ring 52 is clamped inside the clamping sleeve 51. The fixing assembly is used to continuously apply a force to the valve seat 4 to make it close to the clamping sleeve 51 so that the clamping ring 52 is clamped inside the clamping sleeve 51, and one side of the sealing ring 53 abuts against the valve seat 4 to form a seal.

[0027] With such arrangement, when installing the valve seat 4, the side of the valve seat 4 close to the clamping ring 52 is pressed against the inner surface of the valve body 1, and then the valve seat 4 is pushed to move close to the valve body 1, so that one side of the clamping ring 52 is clamped into the inside of the clamping sleeve 51, and then the force of pressing the clamping sleeve 51 is continuously applied to the valve seat 4 through the fixing component so that the clamping ring 52 is clamped into the inside of the clamping sleeve 51. At this time, the sealing ring 53 is tightly attached to the valve seat 4 under the action of its own elastic force to form a seal; when the valve seat 4 needs to be removed, the fixing component to the valve seat 4 is released, and then the valve seat 4 is pulled away from the clamping sleeve 51 to separate the clamping ring 52 from the clamping sleeve 51.

[0028] Optionally, in some embodiments, referring to Figure 4 and Figure 5 The fixing assembly includes a Y-shaped bracket 541 and two abutment blocks 542. The Y-shaped bracket 541 is fixedly arranged on a surface of the drain cover 15 close to the gate plate 3. The abutment blocks 542 are respectively fixedly arranged on one end of the two valve seats 4 close to the drain cover 15. An inclined surface is provided on the end of the abutment block 542 close to the drain cover 15. The height of the inclined surface gradually increases along the direction close to the gate plate 3. An inclined surface matching the inclined surface provided on the abutment block 542 is provided on the end of the Y-shaped bracket 541 away from the drain cover 15. The Y-shaped bracket 541 abuts against the abutment block 542 through the two inclined surfaces.

[0029] With such arrangement, when installing the valve seat 4, after the clamping ring 52 is inserted into the clamping sleeve 51, the sealing ring 53 abuts against the valve seat 4 and applies a thrust to the valve seat 4 under the action of its own elastic force, so that the side of the clamping ring 52 is close to the clamping sleeve 51, and the valve seat 4 can be temporarily fixed in the installation position, and then the drain cover 15 is pushed to insert the Y-shaped bracket 541 into the valve body 1 through the drain port 13, and then the drain cover 15 and the valve body 1 are connected by bolts, and the Y-shaped bracket 541 abuts against the bottom of the abutment block 542 through the inclined surface, and as the drain cover 15 is gradually pressed against the valve body 1 by the bolts, the drain cover 15 is A thrust is applied to the abutment block 542 through the Y-shaped bracket 541. Since the contact surface between the Y-shaped bracket 541 and the valve seat 4 is an inclined surface, the inclined surface decomposes the thrust applied by the Y-shaped bracket 541 to the abutment block 542 into two components in the vertical and horizontal directions. The vertical component presses the clamping ring 52 tightly inside the clamping sleeve 51, and the horizontal component presses the valve seat 4 tightly against the valve body 1 and the sealing ring 53, thereby completing the fixation of the valve seat 4. When the valve seat 4 needs to be replaced, the drain cover 15 is removed from the valve body 1, and the Y-shaped bracket 541 is separated from the abutment block 542 to release the fixation of the valve seat 4.

[0030] Optionally, in some embodiments, referring to Figure 1 and Figure 2 The driving mechanism includes a valve stem 61, a valve stem bracket 62 and a first threaded sleeve 63. The valve stem bracket 62 is fixedly arranged on a surface of the valve cover 2 away from the valve body 1. The first threaded sleeve 63 is rotatably arranged on an end of the valve stem bracket 62 away from the valve cover 2. One end of the valve stem 61 passes through the first threaded sleeve 63, the valve stem bracket 62 and the valve cover 2 in sequence and is fixedly connected to the gate plate 3. The outer peripheral surface of the valve stem 61 is threadedly connected to the first threaded sleeve 63.

[0031] With such arrangement, when it is necessary to control the gate plate 3 to move up and down to change the opening and closing state of the gate valve, the first threaded sleeve 63 is screwed. The height of the first threaded sleeve 63 is fixed, so that the valve stem 61 is pushed by the thread to drive the gate plate 3 to move up and down, thereby completing the control of the opening and closing state of the gate valve.

[0032] Optionally, in some embodiments, see Figure 1 and Figure 2 The driving mechanism also includes a first guide assembly for limiting the rotation of the valve stem 61. The first guide assembly includes a first guide bar 64. The first guide bar 64 is fixedly arranged on the valve cover 2. A first guide groove 611 is opened on the outer peripheral surface of the valve stem 61. The first guide bar 64 is slidably connected inside the first guide groove 611.

[0033] With such arrangement, when the first threaded sleeve 63 is turned to drive the valve stem 61 to move up and down, the first guide strip 64 slides up and down relative to the valve stem 61 inside the first guide groove 611, thereby preventing the first threaded sleeve 63 from rotating and driving the valve cover 2 to rotate when the lubrication condition between the valve stem 61 and the first threaded sleeve 63 is poor, so that the gate plate 3 cannot be raised and lowered normally.

[0034] Optionally, in some embodiments, see Figures 4 to 12 The drive mechanism also includes a connecting component, which is used to connect the valve stem 61 and the gate plate 3; the connecting component includes a connecting sleeve 71, a mounting head 72, a plurality of clamping blocks 73 and a control component. The connecting sleeve 71 is fixedly arranged on one end of the gate plate 3 close to the valve cover 2, and an opening 711 is provided on the side of the connecting sleeve 71 away from the gate plate 3. One end of the valve stem 61 close to the gate plate 3 passes through the opening 711 and is located inside the connecting sleeve 71. The mounting head 72 is bolted to one end of the valve stem 61 close to the gate plate 3. A plurality of mounting grooves 721 are provided on the mounting head 72. The clamping block 73 is rotatably arranged inside the mounting groove 721. One side of the clamping block 73 abuts against the connecting sleeve 71. The control component is used to keep the valve stem 61 against the gate plate 3 so as to cooperate with the clamping block 73 to fix one end of the valve stem 61 to the gate plate 3. The control component can also control the rotation of the clamping block 73 to connect or separate the clamping block 73 from the connecting sleeve 71.

[0035] With such arrangement, when the gate valve is opened and closed, mutual wear will occur between the valve seat 4 and the gate plate 3, and the fluid circulating inside the gate valve will also wash the gate plate 3. After the gate valve is used for a long time, the sealing surface of the gate plate 3 may be greatly worn, resulting in reduced sealing of the gate valve; when the gate plate 3 needs to be replaced, the sewage cover 15 is removed from the valve body 1, and then the two valve seats 4 are taken out from the sewage pipe, and then the gate plate 3 is driven to drop to the lowest point through the valve stem 61, and then the control component is used to control each clamping block 73 to rotate and close to the axial direction of the valve stem 61, so that the clamping block 73 is separated from the connecting sleeve 71, the fixation of the valve stem 61 is released, and then the gate plate 3 is moved down. , pass the installation head 72 through the opening 711, take the gate 3 out from the drain outlet 13, and then install the new gate 3 with one end of the connecting sleeve 71 facing upward through the drain outlet 13, so that the installation head 72 passes through the opening 711 and enters the interior of the connecting sleeve 71, and then control the reversal of each block through the control component, and then keep the valve stem 61 against the gate 3 through the control component so that it cooperates with the clamping block 73 to fix one end of the valve stem 61 to the gate 3, and then install the valve seat 4 and the drain cover 15 back to their original positions in turn; thereby allowing the staff to replace the gate 3 through the drain outlet 13, simplifying the operating procedure for replacing the gate valve gate 3.

[0036] Optionally, in some embodiments, see Figures 4 to 11 The control assembly includes an inner rod 81, a driving member, a limiting member, a rotating shaft 84, an elastic member and a positioning block 74. The valve stem 61 and the mounting head 72 are both hollow structures. One end of the inner rod 81 passes through the valve stem 61 and the mounting head 72 in sequence and abuts against the gate 3. The positioning block 74 is fixedly arranged on the end of the gate 3 close to the valve stem 61. A positioning groove 812 is opened at the end of the inner rod 81 close to the gate 3. The positioning block 74 is clamped inside the positioning groove 812. The rotating shaft 84 is fixedly connected to the inside of the mounting groove 721. The clamping block 74 3 are rotatably connected to the rotating shaft 84. The elastic member is arranged on the rotating shaft 84 and is used to apply elastic force to the clamping block 73 so that the end abutting against the connecting sleeve 71 rotates and separates from the connecting sleeve 71. The clamping block 73 is provided with a circumferential surface 731 matched with the outer circumferential surface of the inner rod 81 at one end close to the inner rod 81. The clamping block 73 abuts against the outer circumferential surface of the inner rod 81 through the circumferential surface 731. The driving member is used to drive the inner rod 81 to move up and down relative to the valve stem 61. The limiting member is used to limit the rotation of the inner rod 81 relative to the valve stem 61.

[0037] In this way, when the valve stem 61 is connected to the gate plate 3 through the connecting assembly, the inner rod 81 is at the lowest point relative to the valve stem 61. When the connection needs to be released, the inner rod 81 is driven upward relative to the valve stem 61 by the driving member, the valve stem 61 remains stationary, the end of the inner rod 81 abutting against the gate plate 3 is separated from the gate plate 3, and then the inner rod 81 continues to be moved upward, so that the lowest point of the inner rod 81 completely enters the inside of the valve stem 61, and the outer peripheral surface of the inner rod 81 no longer abuts against each clamping block 73. Each clamping block 73 is elastically pressed under the action of the elastic force applied by the elastic member. The valve stem 61 is then connected to the gate 3 by the mounting assembly 72. The mounting assembly 72 is moved through the opening 711 to the inside of the connecting sleeve 71. The connecting sleeve 71 is then temporarily kept stationary. The inner rod 81 is driven downward by the driving member. After the bottom of the inner rod 81 contacts the side of the circumferential surface 731 of the mounting assembly 73, the inner rod 81 continues to move downward. When the inner rod 81 is in contact with the positioning block 74, the position of the gate plate 3 is slightly adjusted so that the positioning block 74 is inserted into the positioning groove 812, and then the inner rod 81 is driven downward until it abuts against the gate plate 3. At this time, the clamping block 73 and the connecting sleeve 71 are in contact with each other through the circumferential surface 731. A certain distance is maintained between the cylinders 71, and the staff can continue to drive the inner rod 81 downward through the driving member. After the inner rod 81 pushes the gate plate 3 downward to make the connecting sleeve 71 contact with the clamping block 73, it is inconvenient to maintain the distance between the inner rod 81 and the valve stem 61, and the bottom of the inner rod 81 abuts against the gate plate 3, and the bottom of the valve stem 61 abuts against the connecting sleeve 71 through the mounting head 72 and the clamping block 73, so that the bottom of the valve stem 61 is fixed on the gate plate 3; the positioning block 74 can position the gate plate 3 to prevent the gate plate 3 from being skewed.

[0038] Optionally, in some embodiments, see Figure 1 , Figure 2 and Fig.10 One end of the connecting sleeve 71 is bolted to the gate plate 3; the elastic member includes a torsion spring 85, which is sleeved on the rotating shaft 84, one end of the torsion spring 85 abuts against the mounting head 72, and the other end of the torsion spring 85 abuts against the clamping block 73, and the driving member includes a second threaded sleeve 82, which is rotatably set on the end of the valve stem 61 away from the gate plate 3, the inner rod 81 passes through the second threaded sleeve 82 and is threadedly connected to the second threaded sleeve 82, and a hand wheel 821 is fixedly set on the first threaded sleeve 63 and the second threaded sleeve 82.

[0039] With such arrangement, since the opening 711 is not closed, impurities in the fluid may enter the connecting sleeve 71 from the opening 711, causing the clamping block 73 to rotate poorly. The staff can take out the gate 3 and remove the connecting sleeve 71 from the gate 3, and then clean the impurities deposited on the top of the gate 3 and the inside of the connecting sleeve 71; when it is necessary to drive the inner rod 81 to move up and down relative to the valve stem 61, the second threaded sleeve 82 is screwed by the handwheel 821, and the second threaded sleeve 82 drives the inner rod 81 to move up and down relative to the valve stem 61 through the thread. The limiter can prevent the inner rod 81 from rotating, so that the second threaded sleeve 82 can smoothly drive the inner rod 81 to rise and fall, while maintaining the positioning effect of the inner rod 81 on the gate 3 through the positioning block 74.

[0040] Optionally, in some embodiments, see Fig.13 The limiting member includes a second guide strip 83 , which is fixedly disposed on the inner circumference of the valve stem 61 , and a second guide groove 811 is formed on the outer circumference of the inner stem 81 , and the second guide strip 83 is slidably connected inside the second guide groove 811 .

[0041] With such arrangement, when the second threaded sleeve 82 is screwed to drive the inner rod 81 to move up and down, the second guide bar 83 slides up and down relative to the inner rod 81 in the second guide groove 811 , thereby limiting the rotation of the inner rod 81 .

[0042] Embodiment 2: The embodiment of the present application also provides a method for using a gate valve that is easy to disassemble and repair. The method for using a gate valve that is easy to disassemble and repair includes the following steps: S1: When the valve seat 4 needs to be replaced, the first threaded sleeve 63 is screwed by the hand wheel 821 to drive the gate plate 3 to move upward, and then the drain cover 15 is removed from the valve body 1; S2: Pull down the valve seat 4 to be replaced, remove the valve seat 4 from the drain port 13, press the side of the new valve seat 4 close to the clamping ring 52 on the inner surface of the valve body 1, and then push the valve seat 4 to move close to the valve body 1, so that one side of the clamping ring 52 is clamped into the inside of the clamping sleeve 51, install the drain cover 15 back onto the valve body 1, and tighten the bolts connecting the drain cover 15 and the valve body 1; S3: When the gate plate 3 needs to be replaced, the first threaded sleeve 63 is screwed by the hand wheel 821 to drive the gate plate 3 to move upward, and then the drain cover 15 and the two valve seats 4 are removed from the valve body 1; S4: Use the hand wheel 821 to turn the second threaded sleeve 82 to drive the inner rod 81 to move up to the highest position, remove the gate plate 3 from the valve stem 61 and take it out from the sewage outlet 13; S5: Move the new gate plate 3 into the valve body 1 through the sewage outlet 13, insert the mounting head 72 into the connecting sleeve 71, and rotate the second threaded sleeve 82 by the hand wheel 821 to drive the inner rod 81 to move downward, so that the bottom positioning block 74 of the inner rod 81 contacts, and then adjust the position of the gate plate 3 so that the positioning block 74 is inserted into the positioning groove 812, and then continue to rotate the hand wheel 821 to drive the inner rod 81 to move downward until it is tightened; S6: Install the two valve seats 4 and the drain cover 15 back to their original positions.

[0043] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gate valve that is easy to disassemble and maintain, characterized in that: The invention comprises a valve body (1), a valve cover (2), a gate plate (3), two valve seats (4), a mounting mechanism and a driving mechanism. The valve body (1) is provided with a water inlet (11), a water outlet (12), a sewage outlet (13) and a mounting port (14). The valve cover (2) is fixedly arranged on the valve body (1) and is used to block the mounting port (14). The valve body (1) is also bolted with a sewage outlet cover (15), and the sewage outlet cover (15) is used to block the sewage outlet (13). The valve seats (4) are symmetrically arranged inside the valve body (1). The gate plate (3) is arranged inside the valve body (1). Two surfaces of the gate plate (3) are respectively in contact with the two valve seats (4) to form a seal to separate the water inlet (11) and the water outlet (12). The mounting mechanism is arranged inside the valve body (1) and is used to install and fix the two valve seats (4). The driving mechanism is arranged on the valve cover (2) and is used to drive the gate plate (3) to move up and down.

2. A gate valve that is easy to disassemble and maintain according to claim 1, characterized in that: The mounting mechanism comprises a clamping sleeve (51), a clamping ring (52), a sealing ring (53) and a fixing assembly, wherein the clamping sleeve (51) is fixedly arranged inside the valve body (1), the clamping ring (52) is fixedly arranged on an end of the valve seat (4) away from the gate plate (3), a sealing groove (16) is provided inside the valve body (1), the sealing ring (53) is arranged inside the sealing groove (16), the clamping ring (52) is clamped inside the clamping sleeve (51), and the fixing assembly is used for continuously applying a force to the valve seat (4) to make it close to the clamping sleeve (51) so that the clamping ring (52) is clamped inside the clamping sleeve (51), and one side of the sealing ring (53) abuts against the valve seat (4) to form a seal.

3. A gate valve that is easy to disassemble and maintain according to claim 2, characterized in that: The fixing assembly comprises a Y-shaped bracket (541) and two abutment blocks (542); the Y-shaped bracket (541) is fixedly arranged on a surface of the sewage discharge cover (15) close to the gate plate (3); the abutment blocks (542) are respectively fixedly arranged on one end of the two valve seats (4) close to the sewage discharge cover (15); an inclined surface is provided on one end of the abutment blocks (542) close to the sewage discharge cover (15); the height of the inclined surface gradually increases in a direction close to the gate plate (3); an inclined surface matching the inclined surface provided on the abutment blocks (542) is provided on one end of the Y-shaped bracket (541) away from the sewage discharge cover (15); and the Y-shaped bracket (541) and the abutment blocks (542) are abutted via the two inclined surfaces.

4. A gate valve that is easy to disassemble and maintain according to any one of claims 1 to 3, characterized in that: The driving mechanism comprises a valve stem (61), a valve stem bracket (62) and a first threaded sleeve (63); the valve stem bracket (62) is fixedly arranged on a surface of the valve cover (2) away from the valve body (1); the first threaded sleeve (63) is rotatably arranged on an end of the valve stem bracket (62) away from the valve cover (2); one end of the valve stem (61) passes through the first threaded sleeve (63), the valve stem bracket (62) and the valve cover (2) in sequence and is fixedly connected to the gate plate (3); the outer peripheral surface of the valve stem (61) is threadedly connected to the first threaded sleeve (63).

5. A gate valve that is easy to disassemble and maintain according to claim 4, characterized in that: The driving mechanism further comprises a first guide assembly for limiting the rotation of the valve stem (61), the first guide assembly comprising a first guide strip (64), the first guide strip (64) being fixedly arranged on the valve cover (2), a first guide groove (611) being formed on the outer peripheral surface of the valve stem (61), and the first guide strip (64) being slidably connected inside the first guide groove (611).

6. A gate valve that is easy to disassemble and maintain according to claim 5, characterized in that: The drive mechanism further comprises a connecting assembly, which is used to connect the valve stem (61) and the gate plate (3); the connecting assembly comprises a connecting sleeve (71), a mounting head (72), a plurality of clamping blocks (73) and a control assembly, the connecting sleeve (71) being fixedly arranged on an end of the gate plate (3) close to the valve cover (2), an opening (711) being provided on a side of the connecting sleeve (71) away from the gate plate (3), an end of the valve stem (61) close to the gate plate (3) passing through the opening (711) and being located inside the connecting sleeve (71), and the mounting head (72) being screwed into the connecting sleeve (71). The bolt is connected to one end of the valve stem (61) close to the gate plate (3); a plurality of mounting grooves (721) are provided on the mounting head (72); the clamping block (73) is rotatably arranged inside the mounting groove (721); one side of the clamping block (73) abuts against the connecting sleeve (71); the control component is used to keep the valve stem (61) pressed against the gate plate (3) so as to cooperate with the clamping block (73) to fix one end of the valve stem (61) to the gate plate (3); the control component can also control the clamping block (73) to rotate so as to connect or separate the clamping block (73) from the connecting sleeve (71).

7. A gate valve that is easy to disassemble and maintain according to claim 6, characterized in that: The control assembly comprises an inner rod (81), a driving member, a limiting member, a rotating shaft (84), an elastic member and a positioning block (74); the valve stem (61) and the mounting head (72) are both hollow structures; one end of the inner rod (81) passes through the valve stem (61) and the mounting head (72) in sequence and abuts against the gate plate (3); the positioning block (74) is fixedly arranged on an end of the gate plate (3) close to the valve stem (61); a positioning groove (812) is formed on an end of the inner rod (81) close to the gate plate (3); the positioning block (74) is clamped inside the positioning groove (812); the rotating shaft (84) is fixedly connected inside the mounting groove (721); The clamping blocks (73) are rotatably connected to the rotating shaft (84); the elastic member is arranged on the rotating shaft (84) and is used to apply an elastic force to the clamping block (73) so that one end of the clamping block (73) abutting against the connecting sleeve (71) rotates and separates from the connecting sleeve (71); one end of the clamping block (73) close to the inner rod (81) is provided with a circumferential surface (731) that matches the outer circumferential surface of the inner rod (81); the clamping block (73) abuts against the outer circumferential surface of the inner rod (81) via the circumferential surface (731); the driving member is used to drive the inner rod (81) to move up and down relative to the valve stem (61); and the limiting member is used to limit the rotation of the inner rod (81) relative to the valve stem (61).

8. A gate valve that is easy to disassemble and maintain according to claim 7, characterized in that: One end of the connecting sleeve (71) is bolted to the gate plate (3); the elastic member comprises a torsion spring (85), the torsion spring (85) is sleeved on the rotating shaft (84), one end of the torsion spring (85) is in contact with the mounting head (72), and the other end of the torsion spring (85) is in contact with the clamping block (73); the driving member comprises a second threaded sleeve (82), the second threaded sleeve (82) is rotatably arranged on an end of the valve stem (61) away from the gate plate (3), the inner rod (81) passes through the second threaded sleeve (82) and is threadedly connected to the second threaded sleeve (82), and a hand wheel (821) is fixedly arranged on the first threaded sleeve (63) and the second threaded sleeve (82).

9. A gate valve that is easy to disassemble and maintain according to claim 7, characterized in that: The limiting member comprises a second guide strip (83), the second guide strip (83) being fixedly arranged on the inner circumferential surface of the valve stem (61), a second guide groove (811) being provided on the outer circumferential surface of the inner stem (81), and the second guide strip (83) being slidably connected inside the second guide groove (811).

10. A method for using a gate valve that is easy to disassemble and maintain as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1: When the valve seat (4) needs to be replaced, the first threaded sleeve (63) is screwed by the hand wheel (821) to drive the gate plate (3) to move upward, and then the drain cover (15) is removed from the valve body (1); S2: Pull down the valve seat (4) to be replaced and remove the valve seat (4) from the drain outlet (13). Then press the side of the new valve seat (4) close to the clamping ring (52) against the inner surface of the valve body (1). Then push the valve seat (4) to move close to the valve body (1) so that one side of the clamping ring (52) is clamped into the inside of the clamping sleeve (51). Then install the drain cover (15) back onto the valve body (1) and tighten the bolts connecting the drain cover (15) and the valve body (1). S3: When the gate plate (3) needs to be replaced, the first threaded sleeve (63) is screwed by the hand wheel (821) to drive the gate plate (3) to move upward, and then the drain cover (15) and the two valve seats (4) are removed from the valve body (1); S4: Using a hand wheel (821) to turn the second threaded sleeve (82) to drive the inner rod (81) to move upward to the highest position, and removing the gate plate (3) from the valve stem (61) and taking it out from the sewage outlet (13); S5: Move the new gate plate (3) into the valve body (1) through the sewage outlet (13), insert the mounting head (72) into the connecting sleeve (71), turn the second threaded sleeve (82) by the hand wheel (821) to rotate and drive the inner rod (81) to move downward, so that the inner rod (81) contacts the bottom positioning block (74), then adjust the position of the gate plate (3) so that the positioning block (74) is inserted into the positioning groove (812), and continue to turn the hand wheel (821) to drive the inner rod (81) to move downward until it is tightened; S6: Install the two valve seats (4) and the drain cover (15) back to their original positions.

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