A monitoring device and method for waterway safety valve of polysilicon production reduction furnace

Abstract

The invention discloses a device and method for monitoring a waterway safety valve of a polysilicon production reduction furnace, and relates to the technical field of waterway safety of a reduction furnace. The device of the invention is installed in series on the waterway as a whole, and is fixed by flanges of an inlet conical tube and an outlet conical tube. After water enters the inlet conical tube, it passes through a separation spiral plate inside the conical tube, and impurities are separated by centrifugal force generated by rotation. Clean water enters a pressure measuring tube and continues to flow. When water flows through a conical shell, it drives blades and a rotating plate to rotate, and a centrifugal counterweight generates centrifugal force to squeeze a second force-sensitive resistor. The water flow rate is determined by monitoring the change in its resistance value. Similarly, the torque generated when water flows through the separation spiral plate acts on the first force-sensitive resistor. The flow rate can also be determined by monitoring the change in its resistance value. When the internal pressure of the waterway increases, the sealing valve plate moves away from the sealing step surface to release the pressure, and the spring preload is adjusted by guiding the slide rod and the rack to move, thereby achieving pressure regulation.

Description

Technical Field

[0001] The present invention relates to the technical field of waterway safety in a reduction furnace, and in particular to a monitoring device and method for a waterway safety valve in a polysilicon production reduction furnace. Background Art

[0002] In the water system, safety valves (such as furnace water, electrode water, jacket water, chassis water, etc.) play a vital protective role. When the internal pressure of the system is too high, the safety valve will automatically open to release excess pressure to prevent equipment damage and pipe bursts. However, there are some problems with existing safety valves in practical applications: unstable start-up and inaccurate start-up pressure. These problems not only affect the normal operation of the safety valve, but also pose a potential threat to the safety of the entire system. In addition, the design of safety valves in the prior art often ignores the impact of impurities in the water on the sealing performance of the valve, resulting in the accumulation of impurities on the sealing surface, reducing the sealing effect, and further increasing the risk of system leakage and failure. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a monitoring device for the water safety valve of a polysilicon production reduction furnace, comprising a pressure measuring tube, a pressure relief tube is vertically fixedly connected to the pressure measuring tube, a sealing step surface is provided on the pressure relief tube, a pressure relief groove is also provided on the pressure relief tube, the pressure relief groove is connected to the outside of the pressure relief tube, a sealing valve plate is overlapped and sealed on the sealing step surface, two symmetrically arranged guide slide rods are fixedly installed on the sealing valve plate, each guide slide rod is surrounded by an adjusting spring, the top ends of the two guide slide rods are slidably sleeved with a hollow screw rod, the top ends of the two hollow screw rods are fixedly mounted with a moving gear, a sealing plate is fixedly installed on the top of the pressure relief tube, and the sealing plate is threadedly matched with the hollow screw rod.

[0004] Preferably, a rack is fixedly mounted on the sealing valve plate, the rack is slidably matched with the inner wall of the pressure relief pipe, a planetary gearbox is also fixedly mounted on the inner wall of the pressure relief pipe, a passive gear meshing with the rack is fixedly mounted on the input shaft of the planetary gearbox, the output shaft of the planetary gearbox extends to the outside of the pressure relief pipe, and a pointer is fixed on the output shaft of the planetary gearbox, a dial is arranged between the pointer and the pressure relief pipe, the dial is fixed on the pressure relief pipe, the dial is rotatably matched with the pointer, a transparent cover is arranged on the outside of the pointer, and the transparent cover is fixed on the dial.

[0005] Preferably, a top cover is fixedly mounted on the top of the pressure relief pipe, a gear column is rotatably mounted between the top cover and the sealing plate, and two movable gears are meshed and slidably matched with the gear column.

[0006] Preferably, rectangular through holes are provided on the top cover and the sealing plate, and the rack can pass through the rectangular through holes. A hand wheel and an adjusting drive gear are rotatably mounted on the upper surface of the top cover, and the hand wheel, the adjusting drive gear and the gear column are fixed as a whole through a transmission shaft. An adjusting gearbox and an adjusting drive motor are fixedly mounted on the outer surface of the top cover, wherein the input shaft of the adjusting gearbox is fixed to the output shaft of the adjusting drive motor, and the output shaft of the adjusting gearbox is fixedly mounted with an adjusting active gear meshing with the adjusting drive gear.

[0007] Preferably, an outlet conical tube is sleeved on the outer side of the pressure measuring tube, a flange is provided at one end of the outlet conical tube, and two parallel support rods are fixedly installed on the inner side of the outlet conical tube at the position of the pressure measuring tube outlet, a conical shell is rotatably installed between the two support rods, blades are fixed on the circumferential surface of the conical shell, a rotating plate is fixed on the inner side of the conical shell, and three centrifugal baffles arranged in an equidistant circular array are fixedly installed on the rotating plate.

[0008] Preferably, each centrifugal shielding block is overlapped with a centrifugal counterweight block, which is installed on the rotating plate along the radial sliding direction of the rotating plate, and a second force-sensitive resistor is overlapped on the opposite surfaces of the centrifugal shielding block and the centrifugal counterweight block.

[0009] Preferably, an inlet conical tube is also sleeved on the outside of the pressure measuring tube, the inlet conical tube and the outlet conical tube are fixedly connected, a flange is provided at one end of the inlet conical tube away from the outlet conical tube, a conical cylinder is rotatably installed on the inside of the inlet conical tube, and an extrusion sheet is fixed on the outer surface of the conical cylinder.

[0010] Preferably, a compensation plate is fixed on the inlet conical tube, a first force-sensitive resistor is overlapped between the opposite surfaces of the compensation plate and the extrusion plate, a separation spiral plate is fixed on the inner wall of the conical tube, and a protective shell is also fixedly installed on the inlet conical tube, and the protective shell is arranged on the outside of the extrusion plate, the first force-sensitive resistor and the compensation plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention controls the pressure of the sealing valve plate to start by squeezing the adjusting spring through the hollow screw rod, ensuring that the safety valve can start stably and timely when the pressure reaches the set value. Compared with the traditional safety valve that is prone to unstable start, this design greatly improves the reliability of the system, ensuring that the safety valve can accurately release excessive pressure under any circumstances, preventing equipment damage and pipe burst accidents; (2) The present invention sets a separation spiral plate at the inlet, and uses centrifugal force to separate impurities in the water through the rotation of the water flow, so that water without impurities enters the pressure measuring tube, which not only improves the water quality inside the pressure measuring tube and avoids the damage of impurities to the equipment, but also ensures the sealing between the sealing step surface and the sealing valve plate, thereby ensuring the long-term stable operation of the entire device; (3) The present invention generates torsional force and centrifugal force when the water flows through these structures through the design of the separation spiral plate and the conical shell. These forces act on the first force-sensitive resistor and the second force-sensitive resistor, and the water flow rate can be accurately judged by monitoring the change of their resistance values. This design can not only monitor the status of water flow in real time, but also detect blockages in the pipeline in time, improving the safety and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle.

[0014] Figure 3 It is a schematic diagram of the structure of the protective shell of the present invention.

[0015] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point B in the middle.

[0016] Figure 5 It is a schematic diagram of the structure of the separation spiral plate of the present invention.

[0017] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point C in the middle.

[0018] Figure 7 It is a schematic diagram of the structure of the rotating plate of the present invention.

[0019] Figure 8 It is a structural schematic diagram of the sealing valve plate of the present invention.

[0020] Fig. 9 It is a schematic diagram of the structure of the gear column of the present invention.

[0021] Fig.10 It is a schematic diagram of the hollow screw structure of the present invention.

[0022] Fig.11 It is a schematic diagram of the sealing step surface structure of the present invention.

[0023] In the figure: 101-conical cylinder; 102-separation spiral plate; 103-extrusion plate; 104-first force-sensitive resistor; 105-offsetting plate; 106-inlet conical tube; 107-protective shell; 108-exit conical tube; 109-support rod; 110-conical shell; 111-blade; 112-rotating plate; 113-centrifugal shielding block; 114-second force-sensitive resistor; 115-centrifugal counterweight; 116-pressure measuring tube; 117-pressure relief tube; 118-pointer; 119-handwheel; 120-adjustment Driving gear; 121-adjusting driving gear; 122-adjusting gearbox; 123-adjusting driving motor; 124-sealing step surface; 125-top cover; 126-transmission shaft; 127-sealing plate; 128-moving gear; 129-hollow screw rod; 130-gear column; 131-guide slide rod; 132-adjusting spring; 133-pressure relief groove; 134-sealing valve plate; 135-rack; 136-passive gear; 137-planetary gearbox; 138-dial; 139-transparent cover. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-Figure 11 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0025] The present invention provides a monitoring device for a waterway safety valve of a polysilicon production reduction furnace, comprising a pressure measuring tube 116, on which a pressure relief tube 117 is vertically fixedly connected, on which a sealing step surface 124 is provided, and on which a pressure relief tube 117 is further provided, and a pressure relief groove 133 is also provided, and the pressure relief groove 133 is connected to the outside of the pressure relief tube 117, wherein a sealing valve plate 134 is overlapped and sealed on the sealing step surface 124, and on which two symmetrically arranged guide slides 131 are fixedly installed, each of which is surrounded by an adjusting spring 132, and the top ends of the two guide slides 131 are slidably sleeved with a hollow screw rod 129, and the top ends of the two hollow screw rods 129 are fixedly installed with a moving gear 128, and a sealing plate 127 is fixedly installed on the top of the pressure relief tube 117, and the sealing plate 127 is threadedly matched with the hollow screw rod 129. A rack 135 is fixedly mounted on the sealing valve plate 134, and the rack 135 is slidably matched with the inner wall of the pressure relief pipe 117. A planetary gearbox 137 is also fixedly mounted on the inner wall of the pressure relief pipe 117. A passive gear 136 meshing with the rack 135 is fixedly mounted on the input shaft of the planetary gearbox 137. The output shaft of the planetary gearbox 137 extends to the outside of the pressure relief pipe 117, and a pointer 118 is fixed on the output shaft of the planetary gearbox 137. A dial 138 is arranged between the pointer 118 and the pressure relief pipe 117, and the dial 138 is fixed on the pressure relief pipe 117. The dial 138 and the pointer 118 are rotatably matched. A transparent cover 139 is arranged on the outside of the pointer 118, and the transparent cover 139 is fixed on the dial 138. A top cover 125 is fixedly installed on the top of the pressure relief pipe 117, a gear column 130 is rotatably installed between the top cover 125 and the sealing plate 127, and two movable gears 128 are meshed and slidably matched with the gear column 130. A rectangular through hole is provided on the top cover 125 and the sealing plate 127, and a rack 135 can pass through the rectangular through hole. A hand wheel 119 and an adjustment drive gear 120 are rotatably installed on the upper surface of the top cover 125, and the hand wheel 119, the adjustment drive gear 120 and the gear column 130 are fixed as a whole through a transmission shaft 126. An adjustment gearbox 122 and an adjustment drive motor 123 are fixedly installed on the outer surface of the top cover 125, wherein the input shaft of the adjustment gearbox 122 is fixed to the output shaft of the adjustment drive motor 123, and an adjustment driving gear 121 meshed with the adjustment drive gear 120 is fixedly installed on the output shaft of the adjustment gearbox 122. An outlet conical tube 108 is sleeved on the outer side of the pressure measuring tube 116, and a flange is provided at one end of the outlet conical tube 108, and two parallel support rods 109 are fixedly installed on the inner side of the outlet conical tube 108 at the position of the outlet of the pressure measuring tube 116, and a conical shell 110 is rotatably installed between the two support rods 109, and blades 111 are fixed on the circumferential surface of the conical shell 110, and a rotating plate 112 is fixed on the inner side of the conical shell 110, and three centrifugal baffle blocks 113 arranged in an equidistant circular array are fixedly installed on the rotating plate 112.Each centrifugal shielding block 113 is overlapped with a centrifugal counterweight block 115, which is slidably mounted on the rotating plate 112 along the radial direction of the rotating plate 112, and a second force-sensitive resistor 114 is overlapped on the opposite surface of the centrifugal shielding block 113 and the centrifugal counterweight block 115. An inlet conical tube 106 is also sleeved on the outer side of the pressure measuring tube 116, and the inlet conical tube 106 is fixedly connected to the outlet conical tube 108. A flange is provided at one end of the inlet conical tube 106 away from the outlet conical tube 108, and a conical cylinder 101 is rotatably mounted inside the inlet conical tube 106, and an extrusion sheet 103 is fixed on the outer surface of the conical cylinder 101. A compensation plate 105 is fixed on the inlet conical tube 106, and a first force-sensitive resistor 104 is overlapped between the opposite surfaces of the compensation plate 105 and the extrusion plate 103. A separation spiral plate 102 is fixed on the inner wall of the conical cylinder 101. A protective shell 107 is also fixedly installed on the inlet conical tube 106, and the protective shell 107 is sleeved on the outside of the extrusion plate 103, the first force-sensitive resistor 104 and the compensation plate 105.

[0026] The working principle of a water circuit safety valve monitoring device for a polysilicon production reduction furnace disclosed in the present invention is as follows: the device is installed in series as a whole on the water circuit (the flanges on the inlet conical tube 106 and the outlet conical tube 108 are fixedly installed). The inlet conical tube 106 serves as a water inlet, and the outlet conical tube 108 serves as a water outlet. When water enters the inlet conical tube 106, it will pass through the separation spiral plate 102 inside the conical cylinder 101. At this time, the water will rotate under the restriction of the separation spiral plate 102. During the rotation, the impurities in the water will be affected by the centrifugal force and flow forward along the inner wall of the conical cylinder 101, so that it flows to the outside of the outer surface of the pressure measuring tube 116 (that is, the position between the inlet conical tube 106 and the pressure measuring tube 116, or the outlet conical tube 108 and the pressure measuring tube 116). Therefore, water without impurities will enter the pressure measuring tube 116, and then continue to flow forward along the pressure measuring tube 116. When the water flows out of the pressure measuring tube 116, it will pass through the conical shell 116. 10, and then drive the blades 111 on the conical shell 110 to rotate, and the conical shell 110 will also rotate, and the rotating plate 112 inside the conical shell 110 will rotate, and the centrifugal counterweight 115 on the rotating plate 112 will rotate. The rotation of the centrifugal counterweight 115 will generate centrifugal force, thereby squeezing the second force-sensitive resistor 114. The faster the water flow rate, the faster the rotation speed of the centrifugal counterweight 115, the greater the centrifugal force generated, and the greater the squeezing force on the second force-sensitive resistor 114. At this time, the resistance of the second force-sensitive resistor 114 itself will decrease. Therefore, the water flow rate can be determined by monitoring the resistance change of the second force-sensitive resistor 114.

[0027] Similarly, when water passes through the separation spiral plate 102, a torsional force will be exerted on the separation spiral plate 102, and the separation spiral plate 102 will transmit the torque to the conical cylinder 101. At this time, the extrusion sheet 103 fixed on the conical cylinder 101 will squeeze the first force-sensitive resistor 104, and the flow rate of water can be determined by monitoring the change in the resistance value of the first force-sensitive resistor 104. Therefore, if the flow rate suddenly decreases, there may be a blockage in the pipeline (the pressure in the pipeline will increase after the blockage), or the water flow itself may decrease in speed (this can be determined by the working state of the water pump).

[0028] When the pressure inside the water channel increases, especially when it exceeds the set pressure value, in order to prevent the problem of pipe bursting, the pressure will squeeze the sealing valve plate 134, and the sealing valve plate 134 will move away from the sealing step surface 124. At this time, the water inside the pressure measuring tube 116 will flow out through the gap between the sealing valve plate 134 and the sealing step surface 124 (the water will pass through the pressure discharge groove 133 and then be discharged. The purpose of setting the pressure discharge groove 133 is to allow water to flow from the bottom of the sealing valve plate 134 to the top of the sealing valve plate 134). During the movement of the sealing valve plate 134, the guide slide bar 131 and the rack 135 will be driven to move. The movement of the guide slide bar 131 will squeeze the adjusting spring 132. The function of the adjusting spring 132 is to apply downward pressure to the sealing valve plate 134 to keep the sealing valve plate 134 in sealing contact with the sealing step surface 124. Therefore, the water pressure needs to overcome the elastic force of the adjusting spring 132 to move. The elastic force of 32 can be adjusted by rotating the hollow screw rod 129. This is because the top and bottom ends of the adjusting spring 132 are in contact with the hollow screw rod 129 and the sealing valve plate 134 respectively, and because the hollow screw rod 129 is threadedly matched with the sealing plate 127, when the hollow screw rod 129 rotates, it will squeeze or loosen the adjusting spring 132, thereby changing the preload force of the adjusting spring 132, and the rotation of the hollow screw rod 129 can be driven by the rotation of the moving gear 128, so at this time, the gear column 130 can be driven to rotate through the transmission shaft 126 by rotating the hand wheel 119 or the adjusting driving gear 120, and the rotation of the gear column 130 will drive the moving gear 128 to rotate, and the adjusting driving motor 123 can also be started, and the adjusting driving motor 123 drives the adjusting driving gear 121 to rotate through the adjusting gearbox 122, and the rotation of the adjusting driving gear 121 will drive the adjusting driving gear 120 to rotate.

[0029] The movement of the rack 135 will drive the passive gear 136 to rotate, and the passive gear 136 will drive the input shaft of the planetary gearbox 137 to rotate. Then the output shaft of the planetary gearbox 137 will drive the pointer 118 to rotate, thereby displaying different scales on the dial 138. By observing the position where the pointer 118 stays on the dial 138, the pressure inside the pressure measuring tube 116 can be known.

[0030] Since the sealing step surface 124 and the sealing valve plate 134 are in contact sealing cooperation, in order to ensure the sealing performance, it is necessary to ensure that there are no impurities in the water to prevent the impurities in the water from staying on the sealing step surface 124, thereby affecting the sealing performance between the sealing step surface 124 and the sealing valve plate 134. Therefore, through the action of the separation spiral plate 102, the impurities in the water can be prevented from entering the interior of the pressure measuring tube 116, thereby ensuring the sealing performance between the sealing step surface 124 and the sealing valve plate 134.

Claims

1. A monitoring device for the water safety valve of a polysilicon production reduction furnace, characterized in that: The pressure measuring tube (116) comprises a pressure relief tube (117) which is vertically fixedly connected to the pressure measuring tube (116), a sealing step surface (124) is provided on the pressure relief tube (117), a pressure relief groove (133) is also provided on the pressure relief tube (117), and the pressure relief groove (133) is connected to the outside of the pressure relief tube (117), wherein a sealing valve plate (134) is overlapped and sealed on the sealing step surface (124), and two symmetrically arranged guide slide rods (131) are fixedly installed on the sealing valve plate (134), each guide slide rod (131) is surrounded by an adjusting spring (132), the top ends of the two guide slide rods (131) are slidably sleeved with a hollow screw rod (129), the top ends of the two hollow screw rods (129) are fixedly installed with a moving gear (128), and a sealing plate (127) is fixedly installed on the top of the pressure relief tube (117), and the sealing plate (127) is threadedly matched with the hollow screw rod (129); A gear rack (135) is fixedly mounted on the sealing valve plate (134), the gear rack (135) is slidably matched with the inner wall of the pressure relief pipe (117), a planetary gearbox (137) is also fixedly mounted on the inner wall of the pressure relief pipe (117), a driven gear (136) meshing with the gear rack (135) is fixedly mounted on the input shaft of the planetary gearbox (137), an output shaft of the planetary gearbox (137) extends to the outside of the pressure relief pipe (117), a pointer (118) is fixedly mounted on the output shaft of the planetary gearbox (137), a dial (138) is arranged between the pointer (118) and the pressure relief pipe (117), the dial (138) is fixed on the pressure relief pipe (117), the dial (138) and the pointer (118) are rotatably matched, a transparent cover (139) is arranged on the outer side of the pointer (118), and the transparent cover (139) is fixed on the dial (138); A top cover (125) is fixedly mounted on the top of the pressure relief pipe (117), a gear column (130) is rotatably mounted between the top cover (125) and the sealing plate (127), and two movable gears (128) are meshed and slidably matched with the gear column (130); A rectangular through hole is provided on the top cover (125) and the sealing plate (127), and the rack (135) can pass through the rectangular through hole. A hand wheel (119) and an adjusting drive gear (120) are rotatably mounted on the upper surface of the top cover (125). The hand wheel (119), the adjusting drive gear (120) and the gear column (130) are fixed as a whole via a transmission shaft (126). An adjusting gearbox (122) and an adjusting drive motor (123) are fixedly mounted on the outer surface of the top cover (125), wherein an input shaft of the adjusting gearbox (122) is fixedly mounted to an output shaft of the adjusting drive motor (123), and an adjusting driving gear (121) meshing with the adjusting drive gear (120) is fixedly mounted on the output shaft of the adjusting gearbox (122); An outlet conical tube (108) is sleeved on the outer side of the pressure measuring tube (116), a flange is provided at one end of the outlet conical tube (108), and two parallel support rods (109) are fixedly installed on the inner side of the outlet conical tube (108) at the position of the outlet of the pressure measuring tube (116), a conical shell (110) is rotatably installed between the two support rods (109), a blade (111) is fixed on the circumferential surface of the conical shell (110), a rotating plate (112) is fixed on the inner side of the conical shell (110), and three centrifugal blocking blocks (113) arranged in an equidistant circular array are fixedly installed on the rotating plate (112); A centrifugal counterweight (115) is overlapped and arranged on each centrifugal shielding block (113), and the centrifugal counterweight (115) is slidably mounted on the rotating plate (112) along the radial direction of the rotating plate (112). A second force-sensitive resistor (114) is overlapped and arranged on the opposite surface of the centrifugal shielding block (113) and the centrifugal counterweight (115).

2. A polysilicon production reduction furnace waterway safety valve monitoring device according to claim 1, characterized in that: An inlet conical tube (106) is also sleeved on the outer side of the pressure measuring tube (116). The inlet conical tube (106) and the outlet conical tube (108) are fixedly connected. A flange is provided at one end of the inlet conical tube (106) away from the outlet conical tube (108). A conical cylinder (101) is rotatably mounted on the inner side of the inlet conical tube (106). An extrusion sheet (103) is fixed on the outer surface of the conical cylinder (101).

3. A polysilicon production reduction furnace waterway safety valve monitoring device according to claim 2, characterized in that: A compensation sheet (105) is fixed on the inlet conical tube (106), and a first force-sensitive resistor (104) is overlapped between the opposing surfaces of the compensation sheet (105) and the extrusion sheet (103). A separation spiral plate (102) is fixed on the inner wall of the conical cylinder (101). A protective shell (107) is also fixedly installed on the inlet conical tube (106), and the protective shell (107) is sleeved on the outer sides of the extrusion sheet (103), the first force-sensitive resistor (104), and the compensation sheet (105).

4. A monitoring method using a monitoring device for a waterway safety valve of a polysilicon production reduction furnace according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, when water enters the inlet conical tube (106), it passes through the separation spiral plate (102) inside the conical cylinder (101). Under the restriction of the separation spiral plate (102), the water rotates, and impurities in the water flow forward along the inner wall of the conical cylinder (101) under the action of centrifugal force and flow to the outside of the outer surface of the pressure measuring tube (116); S2, when the water flows through the separation spiral plate (102), the torque acting on the separation spiral plate (102) is transmitted to the conical cylinder (101), and the extrusion sheet (103) fixed on the conical cylinder (101) squeezes the first force-sensitive resistor (104), and the flow rate of the water is determined by monitoring the change in the resistance value of the first force-sensitive resistor (104); S3, when the pressure inside the water channel increases and exceeds the set pressure value, the pressure squeezes the sealing valve plate (134), the sealing valve plate (134) moves away from the sealing step surface (124), and the water inside the pressure measuring tube (116) flows out through the gap between the sealing valve plate (134) and the sealing step surface (124), guiding the sliding rod (131) to move and squeeze the adjusting spring (132); S4. The elastic force of the adjustment spring (132) is adjusted by rotating the hollow screw (129).

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