High temperature and high pressure electric gate valve

Abstract

The application relates to a high-temperature and high-pressure electric gate valve, and relates to the technical field of electric gate valves, which comprises a valve body, a sealing ring and a valve cover, the valve body is provided with an adjusting mechanism, the adjusting mechanism comprises an adjusting screw rod, the adjusting screw rod is arranged on the valve cover and is arranged in sliding mode on the valve body, an adjusting ring is threadedly connected to the adjusting screw rod, a buffer member is sleeved on the adjusting screw rod and is pressed against the adjusting ring and the valve body under the action of elastic force, two adjusting nuts are threadedly connected to the adjusting screw rod and are abutted against each other to be positioned, and the adjusting nuts are pressed against the valve body under the action of the elastic force of the buffer member and the sealing ring. The application buffers the pressure of the adjusting ring through the buffer member, so that the probability that the adjusting nuts are loosened when moving upward is reduced, meanwhile, the two adjusting nuts are abutted against each other, so that the probability that the adjusting nuts are loosened is further reduced, the risk of steam leakage is reduced, and economic loss and safety risk are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric gate valves, in particular to a high-temperature and high-pressure electric gate valve. BACKGROUND

[0002] At present, a high-temperature and high-pressure electric gate valve is arranged in a main steam pipeline of a power plant, and hot steam in a boiler is sent to a steam turbine through the steam electric gate valve to generate power.

[0003] When the existing electric gate valve operates, high-temperature and high-pressure superheated steam enters an inner cavity, steam pressure acts on a valve cover, the valve cover is lifted and pressed against a sealing ring to be self-sealed, the greater the pressure is, the better the sealing effect is, an adjusting screw and an adjusting nut are arranged on the valve cover and are used for adjusting, when steam is not input, the adjusting nut is pressed against a valve body under the elastic force of the sealing ring, but the adjusting nut is pushed away from the valve body by steam, therefore, the adjusting nut is prone to natural loosening, and steam continuously pushes the valve cover to be pressed against the sealing ring, so that the sealing ring is prone to damage, thereby reducing the sealing property of the valve, and causing steam leakage of the valve in the use process, thereby causing economic loss and safety risk. SUMMARY

[0004] In order to reduce the economic loss and safety risk, the application provides a high-temperature and high-pressure electric gate valve.

[0005] The application provides a high-temperature and high-pressure electric gate valve, which adopts the following technical scheme:

[0006] A high-temperature and high-pressure electric gate valve, which comprises a valve body, a sealing ring arranged on the valve body, a valve cover which is arranged in the valve body in a sliding mode and is pressed against the sealing ring, a control mechanism arranged on the valve body and used for controlling opening and closing, and an adjusting mechanism arranged on the valve body and connected with the valve cover, wherein the adjusting mechanism comprises:

[0007] An adjusting screw, which is arranged on the valve cover and is arranged in the valve body in a sliding mode;

[0008] An adjusting ring, which is threadedly connected with the adjusting screw, and the valve body is provided with a locking assembly connected with the adjusting ring and used for connecting the adjusting ring and the adjusting screw together;

[0009] A buffer, which is sleeved on the adjusting screw and is pressed against the adjusting ring and the valve body under the elastic force;

[0010] Two adjusting nuts, which are threadedly connected with the adjusting screw and are pressed against each other to be positioned, and the adjusting nuts are pressed against the valve body under the elastic force of the buffer and the sealing ring.

[0011] By adopting the technical scheme, the valve cover is pressed against the sealing ring, and the reaction force generated by the sealing ring on the valve cover enables the adjusting nuts to be pressed against the valve body for positioning, the locking assembly connects the adjusting ring and the adjusting screw together, therefore, when high-pressure steam enters the valve body, the high-pressure steam pushes the valve cover to move towards the sealing ring, the valve cover extrudes the sealing ring to enhance the sealing effect, and the valve cover moves to push the adjusting screw to move, the adjusting screw moves to drive the adjusting ring to extrude the buffer, and the buffer buffers the extrusion force, thereby reducing the probability that the adjusting nuts move upward and become loose, and the two adjusting nuts are pressed together, thereby further reducing the probability that the adjusting nuts become loose, and the buffer can also buffer the pressure of the valve cover on the sealing ring to a certain extent, thereby reducing the probability that the sealing ring is damaged due to continuous high pressure of the valve cover, and reducing the risk of steam leakage and economic loss and safety risk.

[0012] When the pressure of the valve cover on the sealing ring needs to be adjusted, the adjusting nut away from the valve body is first loosened to separate from the other adjusting nut, and then the adjusting nut in contact with the valve body is adjusted to drive the adjusting screw and the valve cover to move, after the adjustment is completed, the adjusting nut in contact with the valve body is fixed, and the other adjusting nut is tightened to enable the two adjusting nuts to be pressed together for positioning, thereby realizing the pressure adjustment between the valve cover and the sealing ring, so that the pressure of the sealing ring is in an appropriate state, thereby enhancing the sealing effect of the sealing ring, and reducing the probability that the sealing ring is damaged due to excessive pressure of the valve cover, and the sealing performance of the sealing ring can also be maintained after the elasticity of the sealing ring is reduced, thereby further improving the sealing effect of the sealing ring and reducing economic loss and safety risk.

[0013] Optionally, a plurality of adjusting holes are arranged on the adjusting ring in a circumferential array around the adjusting screw axis, and the locking assembly comprises:

[0014] A locking disc is threadedly connected to the adjusting screw and is pressed against the side wall of the adjusting ring away from the buffer for positioning.

[0015] A locking screw is threadedly connected to the valve body.

[0016] A locking column is arranged on the locking screw and is inserted into the valve body and insertedly matched with one of the adjusting holes.

[0017] By adopting the technical scheme, the adjusting ring is threadedly connected to the adjusting screw, and the locking disc is pressed against the adjusting ring for positioning, thereby reducing the probability that the adjusting ring moves, keeping the distance for placing the buffer unchanged, and thereby improving the buffering effect of the buffer, thereby improving the sealing effect and reducing economic loss and safety risk.

[0018] And the locking column is inserted and installed on the valve body and the adjusting hole, so that the adjusting ring is slidably installed on the valve body, and the locking column guides the movement of the valve cover when the adjusting screw is adjusted, so that the displacement distance of the valve cover tends to be uniform, the sealing effect of the sealing ring is improved, and economic loss and safety risk are reduced; meanwhile, the locking screw can also take out the locking column from the valve body and the adjusting hole, so that the locking column and the adjusting ring are convenient to replace, so that the sealing effect of the sealing ring is further improved, and economic loss and safety risk are reduced; meanwhile, multiple adjusting holes can realize the locking of the adjusting ring after the position of the adjusting ring is adjusted.

[0019] Optionally, the two adjusting nuts comprise a first nut in contact with the valve body and a second nut, the adjusting screw is provided with a positioning assembly for positioning the first nut, and the adjusting screw is provided with a sliding groove along the adjusting screw axis.

[0020] The positioning ring is rotationally arranged on the second nut and slidably arranged on the positioning groove, and the first nut and the second nut clamp the positioning ring.

[0021] The plurality of positioning plates are arranged on the positioning ring and abut on the adjacent two side walls of the first nut for positioning.

[0022] By adopting the above technical scheme, the first nut is threadedly connected to the adjusting screw and abuts on the valve body for positioning, then the positioning ring is slidably installed on the positioning groove, and the second nut is threadedly connected to the adjusting screw, so that the plurality of positioning plates abut on the plurality of side walls of the first nut for positioning, the positioning ring abuts on the first nut, and the second nut abuts on the positioning ring, so that the positioning ring and the positioning plates are slidably installed on the adjusting screw, the positioning plates position the first nut, and the second nut positions the positioning plates, thereby reducing the probability of loosening of the first nut, and reducing economic loss and safety risk.

[0023] When adjustment is needed, the second nut is screwed to drive the positioning plates away from the first nut, and then the first nut can be rotated for adjustment, after adjustment is completed, the second nut is continued to be rotated to be close to the first nut, so that the positioning plates abut on the side walls of the first nut for positioning, so that the first nut is fixed, and then the second nut and the first nut clamp the positioning ring for positioning, thereby improving the convenience during adjustment, and without using a wrench to fix the first nut, the first nut and the second nut can be fixed by abutting together, thereby further improving the convenience during adjustment.

[0024] Optionally, the buffer comprises:

[0025] The two elastic sheets are both semicircular rings and are sleeved on the adjusting screw.

[0026] The connecting block is arranged on the elastic sheet, and the connecting block arranged on one of the elastic sheets is clamped and mounted on the other elastic sheet for positioning, and the adjusting ring is pressed on the elastic sheet for blocking the connecting block from being separated from the elastic sheet.

[0027] By adopting the above technical scheme, when the buffer needs to be replaced, the adjusting plate is rotated away from the valve body, then the two elastic sheets are moved, the connecting block is separated from the elastic sheet, the elastic sheet is replaced, the connecting block is clamped and mounted on the other elastic sheet for positioning, and finally the adjusting plate is screwed up to the original position, so as to realize the replacement of the buffer, improve the buffering effect of the sealing ring, improve the sealing effect of the sealing ring, and reduce economic loss and safety risk.

[0028] Optionally, a fixed plate is detachably arranged on the valve body, a control rod extending into the valve body and connected with the control mechanism is slidably arranged on the valve cover, a moving rod connected with the control mechanism and detachably connected with the control rod through the connecting assembly is further arranged on the valve body, the control rod slides through the fixed plate, a sealing groove is arranged on the end of the valve cover close to the outside of the valve body and located at the connection position of the control rod, and a sealing assembly for sealing is arranged in the sealing groove.

[0029] A sealing sleeve is sleeved on the control rod and pressed on the sealing groove and the fixed plate, and the sealing ring and the sealing sleeve are extruded when the valve cover is moved by the steam;

[0030] Two clamping rings are arranged on the two ends of the sealing sleeve and clamped and mounted in the sealing groove and the fixed plate for positioning.

[0031] By adopting the above technical scheme, the control rod connects the control mechanisms on the two sides of the valve body together, the sealing sleeve is clamped and mounted in the sealing groove and sleeved on the control rod, the clamping rings on the two ends of the sealing sleeve are clamped and mounted in the sealing groove and the fixed ring for positioning, and when the valve cover is moved by the high-pressure steam, the valve cover is extruded by the sealing sleeve, and the sealing sleeve is extruded and shrunk, so that the reaction force of the sealing sleeve on the control rod is greater, thereby further improving the sealing effect of the sealing sleeve on the gap between the control rod and the valve cover, and the sealing sleeve is located on the side of the valve cover close to the outside of the valve body, thereby reducing the probability of damage to the sealing ring caused by the contact of the high-pressure and high-temperature steam with the sealing sleeve, and further improving the sealing effect, so as to reduce economic loss and safety risk.

[0032] Meanwhile, the two ends of the sealing sleeve are clamped and installed on the sealing groove and the fixed plate through the clamping rings, so that the probability of the two ends of the sealing sleeve being pressed together due to the movement of the control rod is reduced, the sealing effect of the sealing sleeve is improved, and the sealing sleeve can be taken out for replacement after the fixed plate and the moving rod are disassembled, so that the sealing effect of the sealing sleeve is improved, and the economic loss and safety risk are further reduced.

[0033] Optionally, the mounting sleeve is inserted and installed on the sealing groove, a mounting hole in a conical shape is formed in the mounting sleeve, and the mounting sleeve is detachably connected with the valve cover through bolts, the diameter of the mounting hole near the fixed plate is larger than the diameter of the mounting hole away from the fixed plate, the mounting sleeve away from the fixed plate is provided with a mounting fixed ring abutting against the bottom of the sealing groove, the mounting fixed ring is provided with a sealing ring abutting against and sealing the bottom of the sealing groove, and one of the clamping rings is clamped and installed on the mounting fixed ring.

[0034] By adopting the above technical scheme, after the moving rod and the control rod are disassembled, the mounting sleeve can be pulled out to replace the sealing sleeve, the sealing sleeve is clamped and installed on the mounting hole, one of the clamping rings is clamped and installed on the mounting fixed ring, and the other end of the sealing sleeve is located outside the mounting hole, so that the replacement of the sealing sleeve is completed; then the sealing sleeve is sleeved on the control rod, the mounting sleeve is continuously moved to be inserted and installed on the sealing groove, the mounting sleeve is then fixed through the bolts, and then the fixed plate is installed on the valve body, so that the control rod passes through the fixed plate, and the other clamping ring is clamped and installed on the fixed plate, so that the sealing sleeve is sleeved on the control rod for sealing, the conical mounting hole makes the pressing force of the valve cover on the sealing sleeve tend to be balanced, the sealing effect of the sealing sleeve on the control rod is improved, the economic loss and safety risk are reduced, and the sealing ring is sealed to further reduce the risk of steam leakage; meanwhile, the sealing sleeve can be clamped and installed on the mounting hole in advance, and can be directly installed for replacement when replacement is needed, so that the convenience of replacing the sealing sleeve is improved.

[0035] Optionally, the valve body and the mounting sleeve are provided with detection assemblies for detecting the pressures of the sealing ring and the sealing sleeve respectively, the detection assembly comprises:

[0036] a detection ring sleeved on the adjusting screw, and the adjusting nut abutting against the detection ring for positioning,

[0037] two pressure detection elements, the two pressure detection elements are arranged on the detection ring and the mounting hole respectively and are used for detecting the pressure;

[0038] A display screen is arranged on the fixed plate and electrically connected with the two pressure detecting elements and used for displaying the pressure value, and an alarm buzzer is arranged on the display screen and used for alarming when the pressure value is lower than a specified value.

[0039] By adopting the technical scheme, when the elastic force of the sealing ring is reduced, the adjusting screw moves under the action of the buffer, so that the pressure detecting element detects the reduced pressure of the adjusting nut, and when the elastic force of the sealing sleeve is reduced, the pressure on the pressure detecting element is reduced, thus the position of the valve cover needs to be adjusted, and when the adjusting is performed, the pressure values of the sealing ring and the sealing sleeve can be known through the display screen, so that the pressure of the sealing ring and the sealing sleeve is in an appropriate state, thereby improving the sealing effect, and the alarm buzzer performs buzzer alarming when the pressure value is low, thereby reminding the staff to adjust or replace, so as to reduce economic loss and safety risk.

[0040] Optionally, the connecting assembly comprises:

[0041] The connecting column is arranged on the control rod and is inserted into the moving rod and is provided with an insertion hole.

[0042] The connecting screw is screwed on the moving rod and is inserted into the insertion hole for positioning.

[0043] By adopting the technical scheme, the connecting screw is twisted to be separated from the insertion hole, so that the control mechanism can be started to drive the moving rod to move away from the control rod, so that the connecting column and the control rod are separated, so as to realize the disassembly of the moving rod and the control rod, and when the connection is needed, the control mechanism is started to drive the moving rod to move back, so that the connecting column is inserted into the moving rod, and then the connecting screw is twisted to be inserted into the insertion hole for positioning, so as to realize the detachable connection of the moving rod and the control rod.

[0044] Optionally, the valve body is provided with an air inlet pipe and an air outlet pipe for steam to enter and output, and the control mechanism comprises:

[0045] The two mounting rings are arranged on the valve body and are located on both sides of the control rod, the two mounting rings and the side wall of the valve body cooperatively form a control channel with a trapezoidal cross section and for steam to pass through, and the length of the control channel cross section near the valve cover is greater than the length of the control channel cross section away from the valve cover.

[0046] The mounting seat is arranged on the control rod and is located between the two mounting rings, and two mounting grooves are arranged on the two opposite side walls of the mounting seat and are located on both sides of the control rod.

[0047] Two gates, two said gates are movably connected on two installation grooves and are clampedly installed on the control channel, and two said gates abut against two installation rings and are used for controlling the flow of medium; before the gate contacts with the installation ring, two said gates rotate downward under the action of gravity at the end away from the installation base and abut against the installation groove, so that the distance between two said gates on the side close to the control channel is shortened, and when two said gates abut against two installation rings, the control rod drives the installation base and the gate to continue to move downward and pushes two said gates away from each other and abut against the installation ring;

[0048] A driving assembly is arranged on the valve body and is used for driving the control rod to move.

[0049] By adopting the above technical scheme, the driving assembly drives the control rod to move, the control rod drives the installation base to move close to the control channel, and two said gates abut against the installation groove under the action of gravity, so that the distance between two said gates on the side close to the control channel is shortened, so as to facilitate two said gates to enter the control channel, and the gate abuts against the installation ring, and the control rod continues to move and drives the installation base to extrude two said gates away from each other and rotate, so that two said gates abut against the installation ring, thereby blocking the control channel and closing the steam flow;

[0050] When the control channel needs to be opened, the driving assembly drives the installation base and two said gates to move back, and the gate on the side close to the valve cover continues to abut against two installation rings under the action of gravity, and the steam flows from the gap between the gate and the installation ring, so that the gate blocks the steam from entering the inside of the control rod and the valve cover, thereby reducing the probability of steam overflowing through the gap between the control rod, the valve cover and the valve body, and reducing economic loss and safety risk; and there is a gap between the gate and the installation groove, thereby reducing the probability of the gate being stuck and improving the convenience of opening and closing the control gate valve.

[0051] Optionally, two said gates are provided with a linkage assembly for driving two said gates to rotate together, and the linkage assembly comprises:

[0052] Two linkage columns are arranged on the side walls on the opposite sides of two said gates, and two linkage grooves are arranged on the side walls on the opposite sides of two said gates;

[0053] A positioning ball is arranged on one of the linkage columns, and a positioning groove matched with the positioning ball is arranged on the other linkage column;

[0054] An expansion ring is clampedly installed on two linkage grooves and is filled with inert gas, and the expansion ring is elastic and abuts against two linkage grooves.

[0055] By adopting the technical scheme, the two gates drive the two linkage columns to rotate when rotating, the positioning ball is always in contact with the positioning groove, and the positioning ball can also be clamped and matched with the positioning groove, so that the probability of misalignment of the two gates when rotating is reduced, and the consistency of the two gates when rotating is improved, and the expansion ring is pressed against the two linkage grooves under the action of the internal inert gas, part of the expansion ring is extruded when the gate rotates, and part of the expansion ring is also loosened, so that the gas at the extruded position of the expansion ring moves to the loosened position of the expansion ring, so that the pressure of the expansion ring on the linkage groove is balanced, so that the extrusion force of the two gates is balanced and the two gates rotate consistently, thereby improving the plugging effect of the two gates.

[0056] In summary, the present application has at least one of the following beneficial technical effects:

[0057] When the high-pressure steam enters the valve body, the high-pressure steam drives the adjusting ring to move, and the buffer member buffers the pressure of the adjusting ring, thereby reducing the probability of loosening of the adjusting nut when moving upward, and the two adjusting nuts are pressed tightly together, thereby further reducing the probability of loosening of the adjusting nut, and the buffer member can also buffer the pressure of the sealing ring on the valve cover to a certain extent, thereby reducing the probability of damage to the sealing ring due to continuous high pressure of the valve cover, thereby reducing the risk of steam leakage and economic loss and safety risk. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 is a perspective structural schematic diagram of the present application;

[0059] Figure 2 is a structural schematic diagram of the adjusting mechanism in the present application;

[0060] Figure 3 is Figure 2 a cross-sectional schematic diagram of A-A in the present application;

[0061] Figure 4 is Figure 3 an enlarged schematic diagram of B part in the present application;

[0062] Figure 5 is a partial exploded view of the present application, mainly showing the adjusting mechanism, the positioning assembly and the detection assembly;

[0063] Figure 6 is Figure 1 a cross-sectional schematic diagram of C-C in the present application.

[0064] Reference numerals: 11. Inlet pipe; 12. Outlet pipe; 13. Sealing ring; 14. Snap-fit ​​ring; 15. Valve cover; 151. First valve section; 152. Second valve section; 153. Guide angle; 154. First mating surface; 155. Second mating surface; 156. Connecting ring; 157. Sealing groove; 16. Control rod; 161. Connecting column; 162. Insertion hole; 163. Connecting screw; 17. Moving rod; 18. Fixing plate; 19. Mounting sleeve; 191. Mounting hole; 192. Mounting ring; 2. Valve body; 21. Valve pipe; 22. Fixing ring; 23. Valve plate; 24. Valve seat; 25. Protrusion; 26. Pressure ring; 3. Sealing assembly; 31. Sealing sleeve; 32. Snap-fit ​​ring; 4. Adjusting mechanism; 41. Adjusting screw; 411. Sliding groove; 42. Adjusting ring; 421. Adjustment... 43. Hole; 431. Buffer; 432. Elastic sheet; 433. Connecting block; 44. Adjusting nut; 45. First nut; 46. Second nut; 5. Locking assembly; 51. Locking disc; 52. Locking screw; 53. Locking post; 6. Positioning assembly; 61. Positioning ring; 62. Positioning plate; 7. Detection assembly; 71. Detection ring; 72. Pressure detection element; 73. Display screen; 74. Alarm buzzer; 8. Control mechanism; 81. Mounting ring; 811. Control channel; 82. Mounting seat; 821. Fixed seat; 822. Bearing ring; 823. Closing ring; 824. Fixed surface; 825. Fixed hole; 826. Mounting groove; 83. Gate; 84. Mounting part; 85. Sealing part; 9. Linkage assembly; 91. Linkage post; 92. Positioning ball; 93. Expansion ring; 94. Positioning groove. Detailed Implementation

[0065] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0066] This application discloses a high-temperature and high-pressure electric gate valve.

[0067] Reference Figure 1 The high-temperature and high-pressure electric gate valve includes a valve body 2, an inlet pipe 11 and an outlet pipe 12 integrally installed on the side wall of the valve body 2. The inlet pipe 11 and the outlet pipe 12 are for steam input and output respectively. The axes of the inlet pipe 11 and the outlet pipe 12 coincide and are horizontal. The valve body 2 is provided with a control mechanism 8 for controlling the connection and blocking of the inlet pipe 11 and the outlet pipe 12.

[0068] Reference Figure 2 and Figure 3 A sealing ring 13 is installed inside the valve body 2, and a valve cover 15 is vertically slidably installed inside the valve body 2. An adjustment mechanism 4 connected to the valve cover 15 is also provided on the valve body 2.

[0069] Reference Figure 1, the valve body 2 includes a valve pipe 21, and a gap exists between the air inlet pipe 11 and the air outlet pipe 12 to form a mounting space, the air inlet pipe 11 and the air outlet pipe 12 are connected together through a protruding part 25, the protruding part 25 is located below the air inlet pipe 11 and the air outlet pipe 12 and communicates with the mounting space, the protruding part 25 is in a downward cylindrical shape, the axis of the protruding part 25 is in a vertical state, and the midpoint of the connecting line of the opposite ends of the air inlet pipe 11 and the air outlet pipe 12 is located on the axis of the protruding part 25; the valve pipe 21 is integrally arranged on the air inlet pipe 11 and the air outlet pipe 12 and located above the air inlet pipe 11, the valve pipe 21 is in a vertical state and the axis of the valve pipe 21 coincides with the axis of the protruding part 25, and the valve pipe 21 communicates with the mounting space.

[0070] With reference to Figure 2 and Figure 3 , a clamping groove is coaxially arranged on the inner side wall of the valve pipe 21, a clamping ring 14 is coaxially and integrally arranged on the upper surface of the sealing ring 13, and the clamping ring 14 is clamped and mounted on the clamping groove for positioning, the sealing ring 13 is pressed against the inner side wall of the valve pipe 21, the inner diameters of the sealing ring 13 and the clamping ring 14 are the same and both have elasticity, a guide corner 153 is arranged on the inner side wall of the lower surface of the sealing ring 13 and extends to the outer side wall of the sealing ring 13; the valve cover 15 is in a cylindrical shape and the axis of the valve cover 15 coincides with the axis of the valve pipe 21, the valve cover 15 includes a first valve part 151 and a second valve part 152 which are coaxially connected together, the first valve part 151 is located below the second valve part 152, the diameter of the first valve part 151 is larger than the diameter of the second valve part 152, a first abutting surface 154 is arranged on the side wall of the first valve part 151 and abuts against the guide corner 153, and a second abutting surface 155 is arranged on the outer side wall of the first valve part 151 and abuts against the inner side wall of the sealing ring 13 and the clamping ring 14.

[0071] With reference to Figure 1 and Figure 3 , when the air inlet pipe 11 and the air outlet pipe 12 communicate to convey steam, high-pressure steam enters the valve pipe 21 to push the first valve part 151 to move, the first valve part 151 moves to extrude the sealing ring 13 to seal by itself, so that the sealing effect is better.

[0072] With reference to Figure 1 and Figure 3, the valve body 2 further comprises a fixed ring 22, three valve plates 23, and a valve seat 24, the fixed ring 22 is detachably installed on the top end of the valve pipe 21 through a screw nut, and the fixed ring 22 and the valve pipe 21 are coaxially arranged, a pressing ring 26 is clamped and installed at the pipe opening of the valve pipe 21, the lower surface of the fixed ring 22 is pressed on the pressing ring 26, the pressing ring 26 is pressed on the clamping ring 14 for positioning, and the second valve part 152 slides through the pressing ring 26 and extends above the pressing ring 26; the three valve plates 23 are fixedly installed on the upper surface of the fixed ring 22, and the three valve plates 23 are arranged obliquely upward; the valve seat 24 is fixedly installed on the top end of the three valve plates 23, and after the fixed ring 22 is removed, the pressing ring 26, the valve plate 23 and the valve seat 24 can be removed, and then the sealing ring 13 and the valve cover 15 can be taken off for replacement, thereby improving the convenience of replacing the sealing ring 13 and the valve cover 15.

[0073] With reference to Figure 1 , Figure 2 and Figure 3 , the control rod 16 coaxially slides through the valve cover 15, the bottom end of the control rod 16 extends into the valve pipe 21 and the top end is located above the valve cover 15; the first valve part 151 and the second valve part 152 are both provided with a sliding hole for the control rod 16 to slide, a sealing groove 157 is coaxially provided on the fixed hole 825 and at the end of the second valve part 152 away from the first valve part 151, and the axes of the sealing groove 157, the sliding hole and the control rod 16 coincide; the three valve plates 23 are provided with a horizontal fixed plate 18 above the valve cover 15 through bolts, and the control rod 16 slides through the fixed plate 18.

[0074] With reference to Figure 3 and Figure 4 , the installation sleeve 19 extending above the sealing groove 157 is coaxially inserted and installed on the sealing groove 157, the outer side wall at the top end of the installation sleeve 19 is coaxially fixedly installed with a pressing ring pressing on the second valve part 152, and the pressing ring is fixedly connected with the second valve part 152 through bolts; meanwhile, the upper and lower ends of the installation sleeve 19 are open, and a tapered installation hole 191 is coaxially provided in the installation sleeve 19, the diameter of the top end of the installation hole 191 is larger than that of the bottom end, and the installation sleeve 19 is coaxially provided with an installation fixed ring 192 at the bottom end, the outer diameter of the installation fixed ring 192 is the same as that of the installation sleeve 19, the inner diameter of the installation fixed ring 192 is smaller than that of the bottom end of the installation hole 191, the installation fixed ring 192 is positioned by abutting on the groove bottom of the sealing groove 157, the inner diameter of the installation fixed ring 192 is larger than the diameter of the control rod 16, and a sealing ring is coaxially clamped and installed at the bottom end of the installation fixed ring 192, and the sealing ring is pressed on the groove bottom of the sealing groove 157 for sealing.

[0075] With reference to Figure 3 and Figure 4The sealing groove 157 is provided with a sealing assembly 3 for sealing, the sealing assembly 3 comprises a sealing sleeve 31 and two clamping rings 32, the sealing sleeve 31 is clamped and installed on the installation hole 191, and the bottom end of the sealing sleeve 31 is abutted against the installation ring 192 for positioning, and the top end of the sealing sleeve 31 vertically extends out of the installation hole 191 and is abutted against the lower surface of the fixed plate 18, and the sealing sleeve 31 is sleeved on the control rod 16; the two clamping rings 32 are coaxially and integrally arranged on the upper and lower ends of the sealing sleeve 31, and the two clamping rings 32 are clamped and installed on the side walls on the opposite sides of the installation ring 192 and the fixed plate 18, respectively.

[0076] With reference to Figure 3 and Figure 4 The sealing sleeve 31 is clamped and installed on the installation hole 191, so that the sealing sleeve 31 is abutbed against the installation ring 192, and the clamping ring 32 is clamped and installed on the installation ring 192 for positioning, then the installation sleeve 19 is clamped and installed on the sealing groove 157, so that the installation ring 192 is abutted against the groove bottom of the sealing groove 157, then the fixed plate 18 is installed, so that the top end of the sealing sleeve 31 is abutted against the lower surface of the fixed plate 18, and the clamping ring 32 is clamped and installed on the fixed plate 18, so as to realize convenient installation of the sealing sleeve 31; at the same time, the steam pushes the second valve part 152 and the installation sleeve 19 to move upward, and the upward movement of the installation sleeve 19 extrudes the sealing sleeve 31, so that the sealing sleeve 31 is abutted against the control rod 16 for sealing.

[0077] With reference to Figure 2 , Figure 3 and Figure 5 The adjusting mechanism 4 comprises an adjusting screw 41, an adjusting ring 42, a buffer 43 and two adjusting nuts 44, a connecting ring 156 is coaxially installed on the outer side wall of the second valve body 2 and located between the pressing ring 26 and the fixed plate 18, the adjusting screw 41 is fixedly installed on the upper surface of the connecting ring 156, and the adjusting screw 41 vertically slides through the fixed plate 18; the adjusting ring 42 is slidably arranged on the fixed plate 18 and is threadedly connected with the adjusting screw 41 through the locking assembly 5, the locking assembly 5 comprises a locking disc 51, a locking screw 52 and a locking column 53, the adjusting ring 42 is coaxially and threadedly connected with the adjusting screw 41, and the adjusting ring 42 is located below the fixed plate 18; the locking disc 51 is threadedly connected with the adjusting screw 41, and the locking disc 51 is abutted against the lower surface of the adjusting ring 42 for positioning, and a plurality of adjusting holes 421 are arranged on the adjusting ring 42 in a circumferential array around the axis of the adjusting screw 41.

[0078] With reference to Figure 2 , Figure 3The upper surface of the fixed plate 18 is provided with a threaded groove, and a locking hole is coaxially arranged at the bottom of the threaded groove. The diameter of the locking hole is smaller than that of the threaded groove, and the diameter of the locking hole is the same as that of the adjusting hole 421. The locking screw 52 is threadedly connected to the threaded groove, and the head of the locking screw 52 is positioned against the fixed plate 18. The locking column 53 is coaxially and integrally arranged on the locking screw 52, and is insertedly installed in the locking hole and in plug connection with one of the adjusting holes 421, so that the adjusting ring 42 cannot rotate but can only move up and down.

[0079] With reference to Figure 2 and Figure 5 The buffer 43 is sleeved on the adjusting screw 41, and is positioned against the adjusting ring 42 and the fixed plate 18 under the action of the elastic force. The buffer 43 includes two elastic sheets 431 and a connecting block 432. The elastic sheet 431 is semicircular, and the two elastic sheets 431 are spliced to form a circular shape. The elastic sheet 431 is made of metal. The connecting block 432 is fixedly installed at one end of the elastic sheet 431, and the upper surface of the other end of the connecting block 432 is provided with a connecting groove in plug connection with the connecting block 432. After the two elastic sheets 431 move up and down and are spliced together, the connecting block 432 of one of the elastic sheets 431 can be in plug connection with the connecting groove of the other elastic sheet 431, so as to complete the splicing of the two elastic sheets 431. At the same time, the elastic sheet 431 is positioned against the side wall on the opposite side of the adjusting ring 42 and the fixed plate 18 under the action of the elastic force, so as to block the connecting block 432 and the connecting groove from being separated.

[0080] With reference to Figure 3 and Figure 5 After the locking screw 52 is twisted to make the locking column 53 separate from the adjusting hole 421, the locking disc 51 is twisted to rotate and move downward. Then, the adjusting ring 42 is twisted to rotate and move downward. Then, the two elastic sheets 431 are pushed away from each other to make the connecting block 432 separate from the connecting groove. Then, the new elastic sheet 431 is moved close to each other, so that the connecting block 432 is in plug connection with the connecting groove. Then, the adjusting ring 42 is twisted to rotate and move upward to the original position. Then, the locking disc 51 is twisted to position against the adjusting ring 42, so as to replace the elastic sheet 431.

[0081] With reference to Figure 2 , Figure 3 and Figure 5, two adjusting nuts 44 include two first nuts 45 and second nuts 46 of the same size, the first nut 45 and the second nut 46 are threadedly connected on the adjusting screw 41, and the first nut 45 is located below the second nut 46, the first nut 45 is pressed on the upper surface of the fixed plate 18 under the elastic force of the sealing ring 13 and the elastic sheet 431, and the first nut 45 and the second nut 46 are pressed together for positioning; The adjusting screw 41 is provided with a positioning assembly 6 for positioning the first nut 45, the positioning assembly 6 includes a positioning ring 61 and a plurality of positioning plates 62, and the side wall of the adjusting screw 41 close to the top end is vertically provided with a sliding groove 411 communicating with the top end of the adjusting screw 41; The first nut 45 is provided with a clamping ring, and the axis of the clamping ring coincides with the axis of the first nut 45, and the positioning ring 61 is coaxially and rotatably installed on the clamping ring and located below the second nut 46, and the positioning ring 61 is vertically slidably installed on the sliding groove 411, and the clamping ring can replace the positioning ring 61; A plurality of positioning plates 62 are fixedly installed on the lower surface of the positioning ring 61, and the plurality of positioning plates 62 are respectively positioned on the plurality of side walls of the first nut 45, and the adjacent two positioning plates 62 are abutted on the adjacent two side walls of the first nut 45, so that the positioning ring 61 and the adjusting screw 41 form an integral whole, so as to prevent the first nut 45 from rotating relative to the adjusting screw 41.

[0082] Referring to Figure 3 、 Figure 4 and Figure 5 , the fixed plate 18 and the mounting sleeve 19 are provided with a detection assembly 7 for detecting the pressure of the sealing ring 13 and the sealing sleeve 31 respectively, the detection assembly 7 includes a detection ring 71, two pressure detection elements 72 and a display screen 73, the detection ring 71 is sleeved on the adjusting screw 41 and abuts on the upper surface of the fixed plate 18, and the first nut 45 abuts on the upper surface of the detection ring 71; A detection groove is formed in the upper surface of the detection ring 71, one of the pressure detection elements 72 is fixedly installed in the detection groove, and the first nut 45 abuts on the pressure detection element 72 located in the detection groove, and the other pressure detection element 72 is fixedly installed in the mounting hole 191, and the sealing sleeve 31 abuts on the pressure detection element 72.

[0083] Referring to Figure 3 、 Figure 4 and Figure 5The display screen 73 is fixedly installed on the upper surface of the fixed plate 18 and is located at the side of the adjusting screw 41. The display screen 73 is electrically connected with the two pressure detecting elements 72 and is used for displaying the two detected pressure values. The values are referenced to the pressure values of the newly replaced sealing ring 13 and the sealing sleeve 31, so as to display the extrusion force values of the sealing ring 13 and the sealing sleeve 31 on the first valve part 151 and the control rod 16, thereby inferring the sealing performance of the sealing ring 13 and the sealing sleeve 31. Meanwhile, the alarm buzzer 74 is fixedly installed on the display screen 73 and is used for performing buzzer alarm when the two pressure values displayed on the display screen 73 are lower than the specified values, thereby reminding to replace the sealing ring 13 and the sealing sleeve 31.

[0084] With reference to Figure 3 , Figure 4 and Figure 5 , the second nut 46 is screwed to move upwards to drive the positioning plate 62 to move upwards, so that the positioning plate 62 is separated from the first nut 45. Then, the first nut 45 is rotated to drive the adjusting screw 41 to move upwards and downwards. The adjusting screw 41 drives the first valve part 151 and the second valve part 152 to move upwards and downwards. The second valve part 152 drives the mounting sleeve 19 to move upwards and downwards. The two pressure detecting elements 72 detect the pressure. The display screen 73 displays the pressure values. After the adjustment is completed, the second nut 46 is screwed to be close to the first nut 45, so that the positioning plates 62 abut against the side wall of the first nut 45 for positioning. Finally, the first nut 45 is tightly abutted on the positioning ring 61, and the positioning ring 61 is tightly abutted on the first nut 45 for positioning. Thus, the pressure of the sealing ring 13 and the sealing sleeve 31 is in the appropriate state, thereby improving the sealing effect of the sealing ring 13 and the sealing sleeve 31.

[0085] With reference to Figure 1 and Figure 6 , the control mechanism 8 comprises two mounting rings 81, a mounting seat 82 and two gate valves 83. The two mounting rings 81 are fixedly installed on the inner side walls of the opposite ends of the air inlet pipe 11 and the air outlet pipe 12 respectively. The two mounting rings 81 are symmetrically arranged about the axis of the control rod 16. The axes of the mounting rings 81 and the air inlet pipe 11 are in the same vertical plane. The axes of the mounting rings 81 are obliquely arranged, so that the distance between the highest points of the two mounting rings 81 is greater than the distance between the lowest points. The side walls of the opposite sides of the two mounting rings 81 and the inner side wall of the valve pipe 21 cooperatively form control channels 811. The control channels 811 have trapezoidal cross sections, and the length of the top end is greater than the length of the bottom end. The control channels 811 are used for the steam in the air inlet pipe 11 to pass into the air outlet pipe 12.

[0086] With reference to Figure 1 and Figure 6, the mounting seat 82 comprises a fixed seat 821, two bearing rings 822 and two closing rings 823, the fixed seat 821 is fixedly installed on the bottom end of the control rod 16, the fixed seat 821 is a horizontal cylinder with an axis parallel to the axis of the air inlet pipe 11, and the projection of the air inlet pipe 11 along the axis of the air inlet pipe 11 is located in the fixed seat 821, and the two side walls of the fixed seat 821 are inclined fixed surfaces 824, the distance between the highest points of the fixed surfaces 824 is greater than the distance between the lowest points, and the two fixed surfaces 824 are parallel to the side walls of the two mounting rings 81, respectively, a fixed hole 825 is formed in the fixed surface 824 and penetrates the two fixed surfaces 824, and the axis of the fixed hole 825 coincides with the axis of the fixed seat 821; the two bearing rings 822 are fixedly installed on the side walls of the two fixed surfaces 824, and the axis of the bearing ring 822 coincides with the axis of the fixed seat 821, and the two closing rings 823 are coaxially and integrally arranged on the inner side walls of the two bearing rings 822, so that the closing ring 823, the bearing ring 822 and the fixed surface 824 cooperate to form an annular mounting groove 826.

[0087] With reference to Figure 1 and Figure 6 , the two gates 83 are movably connected to the two mounting grooves 826, the gate 83 comprises an installation part 84 located in the mounting groove 826 and a blocking part 85 extending out of the mounting groove 826 through the closing ring 823, and the installation part 84 and the blocking part 85 are coaxially arranged cylinders, the diameter of the blocking part 85 is smaller than the diameter of the installation part 84, and the diameter of the blocking part 85 is smaller than the inner diameter of the closing ring 823, the diameter of the installation part 84 is smaller than the diameter of the mounting groove 826, so that there is a movable space between the blocking part 85 and the inner side wall of the closing ring 823 and between the installation part 84 and the outer side wall of the mounting groove 826 for the rotation of the gate 83; before the gate 83 enters the control channel 811, the end of the blocking part 85 away from the installation part 84 rotates downward under the action of gravity, so that the installation part 84 abuts against the mounting groove 826, and the side wall of the blocking part 85 abuts against the inner side wall of the closing ring 823, so that the distance between the lowest points of the two blocking parts 85 is shortened, thereby facilitating the entry of the two gates 83 into the control channel 811, and the two gates 83 can be clamped and installed on the control channel 811 to block the steam.

[0088] With reference to Figure 1 and Figure 6The two gates 83 are provided with a linkage assembly 9 for rotating the two gates 83 together, the linkage assembly 9 comprises two linkage columns 91, a positioning ball 92 and an expansion ring 93, the two linkage columns 91 are coaxially fixedly installed on the opposite end of the two mounting portions 84, and extend into the fixing holes 825, the positioning ball 92 is fixedly installed on one end of the linkage column 91, and the other linkage column 91 is provided with a positioning groove 94 in spherical shape and capable of being clamped and matched with the positioning ball 92, and the positioning ball 92 always abuts against the positioning groove 94, when the two blocking portions 85 rotate upward away from the end of the mounting portion 84, the positioning ball 92 is clamped and installed on the positioning groove 94 for positioning, therefore, when the two gates 83 rotate, the positioning ball 92 abuts against the positioning groove 94 for guiding, and the positioning ball 92 is clamped and installed on the positioning groove 94 for positioning, so that the two mounting portions 84 and the two blocking portions 85 rotate uniformly, and the probability of mutual misalignment of the two gates 83 is reduced.

[0089] With reference to Figure 1 and Figure 6 , the side walls on the opposite sides of the two linkage columns 91 are provided with annular linkage grooves, and the positioning ball 92 is located inside the linkage grooves, the expansion ring 93 is clamped and installed on the two linkage grooves, and the expansion ring 93 is elastic, and the expansion ring 93 is provided with a cavity inside, and the cavity is filled with inert gas, the inert gas can be helium, and the inert gas makes the expansion ring 93 abut against the two linkage grooves, and when the mounting portion 84 rotates, part of the expansion ring 93 is extruded, and the extrusion on part of the expansion ring 93 is released, so that the inert gas in the expansion ring 93 moves to the position where the extrusion is released, the probability of jamming of the two gates 83 when rotating is reduced, and the consistency of the two gates 83 when rotating is improved.

[0090] With reference to Figure 1 , Figure 2 and Figure 5, the control mechanism 8 further comprises a driving assembly arranged on the valve seat 24, and the top end of the control rod 16 is detachably installed with a moving rod 17 through a connecting assembly, the moving rod 17 and the control rod 16 are of the same diameter, and the moving rod 17 is provided with a thread; the connecting assembly comprises a connecting column 161 and a connecting screw 163, the connecting column 161 is coaxially fixedly installed on the top end of the control rod 16, the side wall of the connecting column 161 is provided with a plug-in hole 162, and the connecting column 161 is plug-in matched with the bottom end of the moving rod 17; the connecting screw 163 is threadedly connected on the moving rod 17, and the connecting screw 163 is plug-in installed on the plug-in hole 162 for positioning, and the head of the connecting screw 163 is located in the moving rod 17; the driving assembly comprises a worm wheel, a driving motor and a worm, the part of the moving rod 17 provided with the threaded section is slidably arranged on the valve seat 24, the worm wheel is rotatably installed in the valve seat 24, the axis of the worm wheel coincides with the axis of the moving rod 17, and the worm wheel is provided with a threaded hole which is threadedly connected with the moving rod 17; the driving motor is fixedly installed on the outer side wall of the valve seat 24, and the output shaft of the driving motor horizontally extends into the valve seat 24; and the worm is horizontally rotatably installed in the valve seat 24, and the worm is connected with the output shaft of the driving motor and is meshed with the worm.

[0091] With reference to Figure 1 , Figure 2 and Figure 5 , the driving motor drives the worm to rotate, the worm drives the worm wheel to rotate, and the rotation of the worm wheel drives the moving rod 17 and the control rod 16 to move; when it is needed to disassemble the moving rod 17 and the control rod 16, the connecting screw 163 is screwed away from the plug-in hole 162, then the driving motor drives the moving rod 17 to move away from the control rod 16, so that the connecting column 161 is separated from the moving rod 17, thereby separating the moving rod 17 and the control rod 16, then the driving motor drives the moving rod 17 to move back, so that the connecting column 161 is plug-in installed on the moving rod 17, then the connecting screw 163 is screwed into the plug-in hole 162 for positioning, thereby realizing the detachability of the moving rod 17 and the control rod 16.

[0092] With reference to Figure 1 and Figure 6, the control lever 16 moves the fixed seat 821, the fixed seat 821 moves the two gates 83 to close the control channel 811, and the two sealing parts 85 rotate downward under the action of gravity to contact the two mounting rings 81, then the fixed seat 821 and the sealing part 85 continue to move downward, the two sealing parts 85 rotate away from each other and contact the mounting ring 81, then the fixed seat 821 continues to move downward and pushes the two sealing parts 85 to close the inlet pipe 11 and the outlet pipe 12; when the control lever 16 moves back, the two sealing parts 85 move away from the protruding part 25, and the end of the sealing part 85 away from the mounting part 84 rotates downward under the action of gravity to contact the mounting ring 81 on the side close to the valve cover 15, and the side of the sealing part 85 away from the valve cover 15 rotates away from the mounting ring 81, so that the steam in the inlet pipe 11 can pass through the protruding part 25 into the outlet pipe 12 to adjust the flow rate of the steam, and the area of the passage of the steam into the valve pipe 21 is reduced to reduce the probability of leakage of the steam into the valve pipe 21, and the fixed seat 821 continues to move to move the gate 83 out of the control channel 811.

[0093] The working principle of the embodiment of the application is as follows:

[0094] The driving motor drives the fixed seat 821 and the two gates 83 to move downward, and the end of the two sealing parts 85 away from the mounting part 84 rotates downward under the action of gravity to contact the two mounting rings 81, then the fixed seat 821 continues to move downward, the two sealing parts 85 rotate away from each other and contact the side wall of the mounting ring 81, then the fixed seat 821 pushes the two sealing parts 85 to close the inlet pipe 11 and the outlet pipe 12; when the control lever 16 moves back, the two sealing parts 85 move away from the protruding part 25, the side of the sealing part 85 close to the valve cover 15 contacts the mounting ring 81, and the side of the sealing part 85 away from the valve cover 15 rotates away from the mounting ring 81, so that the steam in the inlet pipe 11 can pass through the protruding part 25 into the outlet pipe 12 to adjust the flow rate of the steam, and the area of the passage of the steam into the valve pipe 21 is reduced to reduce the probability of leakage of the steam into the valve pipe 21, and the fixed seat 821 continues to move to move the gate 83 out of the control channel 811 to realize the opening and closing of the valve body 2.

[0095] When the high-pressure steam enters the valve pipe 21, the high-pressure steam pushes the first valve part 151 to move upwards to press the sealing ring 13, and the first valve part 151 moving upwards drives the adjusting screw 41 and the adjusting ring 42 to move upwards, and the elastic sheet 431 buffers the thrust, and the first valve part 151 moving upwards drives the mounting sleeve 19 to move upwards to press the sealing sleeve 31, thus reducing the probability of the adjusting nut 44 moving upwards to loosen, and also enhancing the sealing effect of the sealing ring 13 and the sealing sleeve 31, and reducing the probability of the sealing ring 13 being damaged by the steam continuously pushing the first valve part 151 to generate a large pressure, thereby reducing the economic loss and safety risk; at the same time, when it is necessary to adjust the pressure of the sealing ring 13 and the sealing sleeve 31, the second nut 46 is screwed to drive the positioning plate 62 to be separated from the first nut 45, then the first nut 45 is screwed to adjust the pressure of the sealing ring 13 and the sealing sleeve 31, and the display screen 73 displays the pressure value, after the adjustment is completed, the second nut 46 is screwed to be close to the first nut 45, so that the positioning plate 62 is abutted on the first nut 45 to be positioned, and the first nut 45 is abutted on the positioning ring 61 to be positioned, so as to make the pressure of the sealing ring 13 and the sealing sleeve 31 be in a suitable state, and the sealing effect of the sealing ring 13 and the sealing sleeve 31 is improved, and the economic loss and safety risk are further reduced.

[0096] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-temperature and high-pressure electric gate valve, comprising a valve body (2), a sealing ring (13) arranged on the valve body (2), a valve cover (15) arranged in the valve body (2) and pressed against the sealing ring (13), and a control mechanism (8) arranged on the valve body (2) to control opening and closing, characterized in that: The valve body (2) is provided with an adjusting mechanism (4) connected with the valve cover (15), and the adjusting mechanism (4) comprises: An adjusting screw (41) is arranged on the valve cover (15) and is slidingly arranged on the valve body (2); An adjusting ring (42) is threadedly connected on the adjusting screw (41), and the valve body (2) is provided with a locking assembly (5) connected with the adjusting ring (42) and used for connecting the adjusting ring (42) and the adjusting screw (41) together; A buffer (43) is sleeved on the adjusting screw (41) and is pressed against the adjusting ring (42) and the valve body (2) under the action of the elastic force; Two adjusting nuts (44) are threadedly connected on the adjusting screw (41) and are positioned by being abutted together, and the adjusting nuts (44) are pressed against the valve body (2) under the action of the elastic force of the buffer (43) and the sealing ring (13); A plurality of adjusting holes (421) are arranged on the adjusting ring (42) in a circumferential array around the axis of the adjusting screw (41), and the locking assembly (5) comprises: A locking disc (51) is threadedly connected on the adjusting screw (41) and is positioned by being abutted against the side wall of the adjusting ring (42) away from the buffer (43); A locking screw (52) is threadedly connected on the valve body (2); A locking column (53) is arranged on the locking screw (52) and is inserted on the valve body (2) and is insertedly matched with one of the adjusting holes (421); The buffer (43) comprises: Two elastic sheets (431) are both semicircular annular and are sleeved on the adjusting screw (41); A connecting block (432) is arranged on the elastic sheet (431), and the connecting block (432) on one of the elastic sheets (431) is clamped and mounted on the other elastic sheet (431) to be positioned, and the adjusting ring (42) is pressed against the elastic sheet (431) to block the connecting block (432) from being separated from the elastic sheet (431).

2. A high temperature and high pressure electrically operated gate valve according to claim 1, characterized in that: The two adjusting nuts (44) comprise a first nut (45) and a second nut (46) in contact with the valve body (2), the adjusting screw (41) is provided with a positioning assembly (6) for positioning the first nut (45), the adjusting screw (41) is provided with a sliding groove (411) along the axis of the adjusting screw (41), and the positioning assembly (6) comprises: A positioning ring (61) is rotatably arranged on the second nut (46) and is slidingly arranged on the positioning groove (94), and the first nut (45) and the second nut (46) clamp and position the positioning ring (61); A plurality of positioning plates (62) are arranged on the positioning ring (61) and are positioned by being abutted against the adjacent two side walls of the first nut (45).

3. A high temperature and high pressure electrically operated gate valve according to claim 1, characterized in that: The valve body (2) is detachably provided with a fixed plate (18), the valve cover (15) is slidably provided with a control rod (16) extending into the valve body (2) and connected with the control mechanism (8), the valve body (2) is further provided with a moving rod (17) connected with the control mechanism (8) and detachably connected with the control rod (16) through a connecting assembly, the control rod (16) slides through the fixed plate (18), the valve cover (15) is provided with a sealing groove (157) near the end of the valve body (2) and connected with the control rod (16), the sealing groove (157) is provided with a sealing assembly (3) for sealing, the sealing assembly (3) comprises: A sealing sleeve (31) is sleeved on the control rod (16) and abuts against the sealing groove (157) and the fixed plate (18), and the sealing ring (13) and the sealing sleeve (31) are extruded when the valve cover (15) is moved by steam; Two clamping rings (32) are respectively provided on both ends of the sealing sleeve (31) and are respectively inserted and installed on the sealing groove (157) and the fixed plate (18) for positioning.

4. A high temperature, high pressure electrically operated gate valve according to claim 3, characterized in that: The sealing groove (157) is inserted and installed with a mounting sleeve (19), the mounting sleeve (19) is provided with a tapered mounting hole (191) and is detachably connected with the valve cover (15) through a bolt, the diameter of the mounting hole (191) near the fixed plate (18) is greater than that of the end away from the fixed plate (18), the mounting sleeve (19) is provided with a mounting ring (192) abutting against the bottom of the sealing groove (157) away from the fixed plate (18), the mounting ring (192) is provided with a sealing ring abutting against the bottom of the sealing groove (157) for sealing, the sealing sleeve (31) is clamped and installed on the mounting hole (191) and one end abuts against the mounting ring (192) for positioning and the other end extends out of the mounting hole (191), and one of the clamping rings (32) is clamped and installed on the mounting ring (192).

5. A high temperature, high pressure electrically operated gate valve according to claim 4, characterised in that: The valve body (2) and the mounting sleeve (19) are provided with a detection assembly (7) for detecting the pressure of the sealing ring (13) and the sealing sleeve (31) respectively, the detection assembly (7) comprises: A detection ring (71) is sleeved on the adjusting screw (41), the adjusting nut (44) abuts against the detection ring (71) for positioning, Two pressure detection elements (72) are respectively provided on the detection ring (71) and the mounting hole (191) and are used for detecting pressure; A display screen (73) is provided on the fixed plate (18) and is electrically connected with the two pressure detection elements (72) and is used for displaying the pressure value, the display screen (73) is further provided with an alarm buzzer (74) for alarming when the pressure value is lower than a specified value.

6. A high temperature, high pressure electrically operated gate valve according to claim 3, characterized in that: The connecting assembly comprises: A connecting column (161) is provided on the control rod (16) and is inserted on the moving rod (17) and is provided with an insertion hole (162). Connecting screw (163) is screwed on moving rod (17) and is positioned by being inserted on insertion hole (162).

7. A high temperature and high pressure electrically operated gate valve according to claim 3, characterized in that: The valve body (2) is provided with an inlet pipe (11) and an outlet pipe (12) for steam inlet and outlet, and the control mechanism (8) comprises: Two mounting rings (81) are arranged on the valve body (2) and located on both sides of the control rod (16), and the two mounting rings (81) and the side wall of the valve body (2) cooperatively form a control channel (811) in trapezoidal cross section for steam passing, the length of the control channel (811) cross section near one end of the valve cover (15) is greater than the length far from the valve cover (15); A mounting seat (82) is arranged on the control rod (16) and located between the two mounting rings (81), and two mounting grooves (826) are arranged on the opposite side walls of the mounting seat (82) and located on both sides of the control rod (16); Two gates (83) are movably connected to the two mounting grooves (826) and clampedly mounted on the control channel (811), and the two gates (83) abut against the two mounting rings (81) and are used for controlling the flow of medium; before the gate (83) contacts with the mounting ring (81), the two gates (83) far from the mounting seat (82) one end are rotated downward under the action of gravity and abut against the mounting groove (826), so that the distance between the two gates (83) near the control channel (811) side becomes shorter, and when the two gates (83) abut against the two mounting rings (81), the control rod (16) drives the mounting seat (82) and the gate (83) to continue to move downward and pushes the two gates (83) away from each other and abuts against the mounting ring (81); A driving assembly is arranged on the valve body (2) and used for driving the control rod (16) to move.

8. A high temperature, high pressure electrically operated gate valve according to claim 7, characterized in that: Linkage assemblies (9) are arranged on the two gates (83) and used for rotating the two gates (83) together, and the linkage assembly (9) comprises: Two linkage columns (91) are arranged on the side walls of the opposite sides of the two gates (83), and linkage grooves are arranged on the side walls of the opposite sides of the two gates (83); A positioning ball (92) is arranged on one of the linkage columns (91), and a positioning groove (94) matched with the positioning ball (92) is arranged on the other linkage column (91); An expansion ring (93) is clampedly mounted on the two linkage grooves and filled with inert gas inside, and the expansion ring (93) is elastic and abuts against the two linkage grooves.

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