TW402678B - Metal-retaining flap valve for a feed hopper - Google Patents

Abstract

A material-retaining flap valve for equipping the discharge opening (12) in a hopper (14) comprises a main seat (16), which is provided with a flow aperture for discharging the contents of the hopper, a mobile blocking device (46) and a driving mechanism suitable for driving the blocking device (46) between a closed position, in which it stops the discharge from the hopper (14), and an open position, in which it allows the flow of material through the main seat (16). The flap valve also comprises a screen (28) for reducing the cross-section of flow of the seat (16) and a driving mechanism suitable for driving the screen (28) between a first position, in which the screen (28) is associated with the main seat (16) so as to reduce the latter's cross-section of flow, and a second position, in which it leaves the cross-section of flow of the main seat (16) completely free.

Description

Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 402678 A7 f Positive _: _ B7 Complementary. _V. Description of the Invention (Hand) The first picture: the plan view of the stop valve; Sectional view of 2; third image: a partially enlarged view of a portion indicated by the letter B from the second image; fourth image: a partially enlarged view of the portion indicated by the letter A from the second image; fifth image: the first A section through line 5-5 in a figure; a section 6 through line 6-6 in the first figure; a section plan view of a stop valve showing an optional drive mechanism. The same reference numbers indicate the same or similar elements. The second figure shows that a stop valve (10) of the present invention is assembled to a discharge opening (12) of a shaft furnace hopper (14). The stop valve (10) includes a ring-shaped main seat (16) sealingly mounted on an annular flange (18) of the hopper (14). As can be seen in the third picture, the main seat (16) defines a concave conical sealing surface (20) and is advantageously provided with an elastic sealing ring (22). It should be noted that the flow section of the main seat (16) is larger than the flow section of the discharge opening (I2) of the feed hopper (I4). The main seat (16) is positioned so that it is hidden behind the stream passing through the discharge opening (12) in the open position of the stop valve (10). The gas stop valve must be operated in a very hot environment-especially if the stop valve is used as part of a shaft furnace's discharge installation-the elastomeric seal must be cooled to increase its service life. For this purpose, a flow groove (24) for providing cooling liquid is provided in the annular seat body (26) of the main seat (16). 8 This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Pack! —Order-!-Turn Α7 Β7

40267δ ___ V. Description of the invention Introduction The stop valve, especially the present invention relates to a feed hopper material stagnation for the feed hopper of a vertical furnace. In the prior art, a stagnant lung and its flow rate are known as EP-A-0062770 (US-A-4,514, 514, 514 '129), which is assembled on a rotary material that is inclined at different angles. Furnace with chute. The stop valve includes two spherical door covers, and the relative movement can synchronously change the flow cross section on both sides of the central axis of the material flow. The door is located in a closed compartment immediately below the feed hopper. At its lower end, the enclosed compartment is provided with a sealed stop valve that can pivot from a side position concealed behind the material flowing out of the hopper to a blocked position transverse to the logistics axis. In this blocked position, the sealed stop valve can be operated by an axial translation on the seat. The seat surrounds the opening of the hopper and is provided with a downwardly-sealing surface, that is, in the direction of the material flow. A device such as described in EP-A-0067277 can fully satisfy the characteristics concerning the adjustment of the flow rate and the gas-tightness. However, “the height of a piece of equipment and its cost is undoubtedly unfavorable”, such as when it is assembled in a small blast furnace. In US-A-4,514,129, it is proposed to combine the airtight function and the material retention function into a single stop valve. The stop valve includes a movable blocking device arranged under a fixed seat. A pivoting mechanism enables the blocking device to be pivoted between a closed position and an open position. 'When in the closed position, Longzhuang B Yanjiu II is in the _ position_' The blocking device is located outside the flow flowing through the seat. . Several measuring instruments mentioned therein ____3 This paper size is applicable to China National Standard (CNS) A4 (210X 297 mm)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, a screen (28) for reducing the flow cross section is pressed onto the main seat (16). In particular, the screen (28) includes an annular frame (30) and an intermediate plate (32). The middle plate (32) is provided with an outflow port (34) that is smaller than the flow cross section of the discharge opening (12) of the feed hopper (14). If a stream with a circular cross section is required, the outflow port (34) can be designed with a circular cross section. The intermediate plate (32) is movably fixed to the ring frame (30), so that it can be replaced after wear or when the flow section of the screen (28) needs to be changed. As best seen in the third figure, the ring frame (30) defines a convex spherical ring-shaped sealing surface (36). The convex spherical ring (36) is matched with the concave conical ring (22) of the main seat (16), regardless of any defects in the direction between the screen (28) and the main seat (16), it is guaranteed that the joint (22) ) The horizontal plane has a circular contact line. Like the main seat (16), the ring frame (30) may also be provided with a flow channel (38) for providing cooling liquid. On the opposite side of the sealing surface (36), the ring frame (30) of the screen (28) has One vice seat (40). As can be seen in the fourth figure, the sub seat (40) defines a concave conical sealing surface (f42) and is advantageously provided with an elastic sealing ring (44). cool down. The blocking device (46) is pressed on the sub seat (40). The blocking device includes a plate (48) provided with a projection (50), which is substantially hollow in shape. As can be seen in the fourth figure, the protrusion (50) defines a convex spherical annular sealing surface (52). The convex sphere 9-r, 'installed ----- ί I ordered --------- aunt (please read the precautions on the back before filling this page) This paper size is applicable to national standards (CNS) ) A4 size (210 X 297 mm) ^ 02678 A7 B7 Description of the invention (>)

I It can be used to protect the sealing surfaces of the blocking device and the seat body from the abrasive effect of the material passing through the seat body of the blocking valve. It should be noted, however, that the charging hopper of the blast furnace may contain particles of different sizes, for example, coke from a particle size of 50 mm to 100 mm; ore from a particle size of 2 mm to 20 mm; particles of about 25 mm Small balls. In view of the fact that the stop valve in US-A-4,514,129 is not designed for the flow rate of the material that flows from the hopper through the seat of the stop valve, it must be accepted that the ratio of the hopper with a finer charge Feed hoppers with coarser charges are emptied more quickly. In addition, in order to ensure that the material passing through the discharge surface is as uniform as possible, the rotation speed of the charging and material feeding chute is adjusted. The finer the particle charge, the faster the ramp rotation speed is required. Now, the difference between the discharge speed of coke with a particle size exceeding 50 mm and the discharge speed of finer ore is so great that any compensation using the speed of the ramp will not help. It must also be pointed out that, in order to reduce the flow rate of the material flowing out of the feed hopper ', it is of course also possible to open the plugging device only partly for the charging of fine particles. However, this may cause a faster abrasion to the blocking device and at the same time create an asymmetry in the chute feed. The purpose of the present invention is to deconcentrate Θ at midnight. The purpose of the present invention is to provide a material retention stop valve of the feeding hopper, which can affect the discharge speed of the feeding hopper without additional increase of erosion of the blocking device and does not cause unfavorable logistics symmetry. According to the present invention, this object is achieved according to the first scope of the patent application scope of the present invention. The main points of the present invention and a material retention stop valve according to the present invention, in a traditional manner, including the paper size, are applicable to China National Standards (CNS) A4 specifications (210X 297 mm) ----- ^ ------ Equipment --- ^ --- 丨 Order --.---- Travel (Please read the precautions on the back before filling out this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Consumer Cooperatives 6402678 A7 B7 Year r Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (The ring (52) is matched with the concave conical ring (42) of the sub seat (40). There are any defects in the direction between 40), so that the horizontal plane of the joint (44) has a circular contact surface. The second figure shows the stop valve in the closed position, and the device (46) is accommodated in this position. In the auxiliary seat (40) of the screen (28), the screen (28) is accommodated in the main seat (16). It should be noted that on the lower surface (56) of the screen (28) and the plate ( An empty gap (58) is left between the upper surfaces (54) of 48). The height h of the empty gap (58) is preferably larger than the diameter of the largest particle of the material passing through the stop valve . This can prevent particles from being squeezed between the blocking device (46) and the screen (28) to damage the blocking valve (10) or prevent it from closing. To open the blocking valve (10), the blocking device (46) can Simply pivot to a lateral position on the outside of the stream flowing through the discharge opening (12) of the feed hopper (14). In this position, the material contained in the feed hopper (14) flows through the screen (28). Outflow port (34). Given that the flow cross section of the outflow port (34) is smaller than the discharge opening (12) of the feed hopper (14), the screen (28) plays a role of blocking the flow and slowing down the flow from the feed hopper (H) Discharging. If the discharging speed of the feeding hopper 04) needs to be increased, it is only necessary to pivot the screen (28) to the side position outside the #flow that flows through the discharging opening of the feeding hopper (14). From the first figure, a preferred embodiment of a mechanism for driving the blocking device (46) and the screen (28) can be understood in detail. The blocking device (46) is supported by a support rod (60) mounted on a first shaft (62). The partition (28) is supported by a fork-shaped rod (64) mounted on a hollow shaft (66), which is sleeved on one end of the first shaft (62). These two axes (62) and (This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm). · .. 'installed ------ >! order -------- --- scale (please read the precautions on the back before filling this page) A7 402678 V. Description of the invention (々) A main seat with an outlet for discharging the contents of the feed hopper, a movable blocking device And a drive mechanism. The drive mechanism is adapted to drive the blocking device between a closed position that stops passing the main hopper from the feed hopper and an open position that allows material to pass through the main seat. According to an important feature of the present invention, the blocking surface includes -A flow-reducing surface screen for reducing the main seat and a driving mechanism. The driving mechanism is suitable for driving the screen at a first position matching the main seat to reduce its flow cross-section, and-a completely releasing the main seat Between the second position of the flow cross section. In this first position, the screen can limit the flow of material through the outflow of the main seat, thus reducing the discharge speed of the feed hopper. It should be understood that the blocking device does not work In order to reduce the discharge speed, the result is that it can be finished The ground moves to the outside of the flow passing through the stop valve and flows through the raft so that it is not exposed to the abrasion of the material. If you need to increase the discharge speed of the feed hopper, you can simply drive the screen to the drive mechanism Outside of the stream. If the screen is provided with a circular cross-section outlet, a restricted stream with a circular cross-section is obtained, that is, it has no asymmetry. The stop valve of the present invention is thus fully applicable On a feeding device with a rotating ramp. In an embodiment of a simple and compact stop valve, the screen is accommodated in the main seat and defines a fj seat for the blocking device to accommodate therein. This embodiment It is also possible to provide a blocking valve closed position while retaining the screen in its first position, and in this first position, the screen cooperates with the main seat to reduce the latter's flow cross section. In a preferred implementation In the example, the screen includes a ring frame and ~ Zhang scale applicable towel national standard f (CNS) A4 specifications (2! 〇- ----- " 'order. Thread (Please read the precautions on the back first Refill this page} Member of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the Consumer Cooperative 403678 A7 B7 MJ. Fifth, the invention description (/) 66) Two shaft sleeves (68), (72) supported on a closed box (70) around the stop valve (10) ). They have a position on the side of the main seat (16) in a plane substantially perpendicular to the logistics axis. The two shafts (62), (66) each have their own drive motors. This motor can be, for example, hydraulic The jacks (76) and (77) can also be rotary motors. In the embodiment of the seventh figure, the two shafts (62) and (66) are provided with only a single motor (76 '). The motor (76') ) The driving shaft (62), that is, the blocking device (46) rotates around the shaft (74). The second motor is replaced by a connector (78). The device includes a connection socket (80), so that it can be in a first connection position. When the blocking device (46) is accommodated in the auxiliary seat of the screen (28), the hollow shaft (66) and the first The shaft (62) is locked; and in a second connection position, when the screen (28) is accommodated in the main seat (16), the hollow shaft (66) and the box (70) are locked. As a result, in the first position, the blocking device (46) and the screen (28) can be rotated together about the shaft (74); while in the second position, the screen (28) can be locked to the main Block (16). In order for the blocking device (48) and the screen (28) to be positioned tightly on their respective bases, a universal > directional suspension is provided between each pair of rain elements. These gimbal type suspensions allow the blocking device (46) and the screen (28) to be freely positioned on their corresponding conical seats. The second figure illustrates a gimbal suspension of the blocking device (46). It includes a fork joint (88) between the blocking device (46) and the support rod (60). The fork joint (88) uses a special shaft sleeve (90). A U-shaped hook pin (92) in the shaft sleeve (90) can not only (please read the precautions on the back before filling this page). !! -PI —Order! I ---- Read the paper printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (21 × 297 mm). One-— ______ 5. Description of the invention (+) An intermediate plate provided with a flow outlet smaller than the flow cross section of the main seat. The intermediate plate is an effectively interchangeable wear-resistant part. If the stop valve is in addition to its In addition to the material retention function, a sealing function must be provided. The screen preferably has a spherical sealing surface. This surface cooperates with the conical sealing surface of the main seat in the closed position of the stop valve to ensure its tightness. The blocking device One part has a protrusion, like a sieve, defines a spherical sealing surface. In the closed position of the stop valve, it cooperates with the conical sealing surface of the sub seat to ensure its tightness. It can be understood that the seal The design of the surface ensures that the horizontal plane on the same circumference of the conical sealing surface of the corresponding seat body always maintains hermetic contact, regardless of any defects in the adjustment. It can be advantageous to equip the sealing surface of the seat body with an elastic joint surface when it touches the circumferential level, so that its sealing performance can be greatly improved. The plugging device preferably includes a protrusion seated in the sub-seat of the compartment. Plate, leaving an empty gap between the screen and the blocking device. The empty gap advantageously has a height greater than the diameter of the largest particle in the material passing through the stop valve. This prevents particles from being squeezed into the blocking device and The blocking valve cannot be closed between the screens. The flow cross section of the main seat is preferably larger than the flow section of the discharge opening of the hopper to ensure that the main seat is not exposed to the abrasion and saturation of the flow flowing through the seat. The screen must then define a flow cross-section that is smaller than the discharge opening of the feed hopper to restrict the flow. The blocking mechanism and / or the drive mechanism of the screen advantageously comprises a pivoting support rod. This latter has a side on the seat body at— Each is approximately perpendicular to ----— _6 This paper wave scale is applicable to the Chinese National Standard (CNS) A4 specification (210 > < 297 public ^ " 5 ~ ------ I --- ^ ----- -Install ---. I-order ---- ^ --- brigade (please first Read the notes on the back and fill out this page) m 402678 A7 B7 months 丨 repair 丨 board;. Ί printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (〖σ) Rotation around its own axis can also be related to the axis The axis of the sleeve (90) is positioned obliquely. For this purpose, for example, the through-hole system in the sleeve (90) defines a generally bulging ring-shaped surface. Of course, the fork joint (88) can also be formed by a The ball bearing is replaced. In the fifth figure, three limit bolts (96) are supported on the support rod (60). The function of this bolt is to limit the possible vibration of the blocking device (46) by the universal suspension. A picture depicts a gimbaled suspension of a screen (28). It includes a suspension with two screens (28) of two rotary joints (97) (98) provided on a fork rod (64), and a rotary joint of a fork rod (64) on a hollow shaft (66). (100). The first and fifth figures show that two bolts (102) can restrict the pivoting of the fork rod (64) about its joint (100). It can be seen in the sixth figure that two bolts (104) arranged oppositely on both sides of the projection (106) of the screen (28) restrict the pivot of the screen (28) with respect to the rotary joints (97) and (98). turn. If, in the blast furnace, the coke is discharged from the feed hopper (14) through the stop valve (10), the blocking device (46) and the screen (28) are simply pivoted to the discharge opening (4) from the feed hopper (4). 12) The lateral position on the outside of the flowing stream. If, on the other hand, pellets, ore or other fine products are to be discharged from the hopper (M) through the stop valve (10), the blocking device (46) is simply pivoted to its side position, and the screen (28) remains in the main seat (16). The intermediate plate (32) has a smaller flow cross-section than the discharge opening (12) of the feed hopper (14), which slows down the discharge of fine products from the feed hopper (14). It should also be noted that the stop valve can also be designed to have a simple material. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (2.10 X 297 mm). --------- Aunt (Please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 402678 a? _______B7 V. Description of the invention (&); in the plane of the logistics axis Pivot axis. In order to ensure that the blocking device or the screen is freely positioned on its corresponding seat, the suspension of the two elements is preferably equipped with a universal connector. If the support rod of the blocking device and the support rod of the screen are provided on the same pivot shaft, a more compact stop valve can be obtained. In this way, a particularly simple drive mechanism can advantageously be produced, so that the blocking device and the screen are driven by a separate motor connected to the support rod of the blocking device. A connecting device enables the support arm of the screen to be mechanically connected to the plugging device 'or to a seat body fixedly attached to the main seat to lock the screen to the main seat. It should be understood that if better control of the discharge speed of the feed hopper is needed ', a set of movable screens with a reduced flow cross-section can be provided in the stop valve. These screens have a flow cross-section similar to that described above. A driving mechanism similar to the driving mechanism described above causes each screen to be driven between a first position and a second position, in which the screen reduces the flow cross-section of the stream flowing from the feed hopper through the stop valve. In the second position, the screen does not affect the flow from the feed hopper through the stop valve. In this structure, it is preferable that a sieve having a maximum flow cross section is accommodated in the main seat. The screens in this group define a sub-seat in which the smaller cross-section of the current-supply section is received. The final screen with the smallest flow cross-section defines a secondary seat in which the plugging device is housed. Other special features and characteristics of the present invention will be described with reference to the drawings. The preferred embodiments according to the following examples will be described in detail with reference to the accompanying drawings. —---- 7________ This paper size is applicable to the Chinese National Standard (CNS) M size (210X297 mm) I ------------------------- Order ---- r- -Λ (Please read the notes on the back before filling this page) A7 B7

402678 V. Description of the invention (//) Please read the notes on the back side and then fill out this page. The retaining valve is not sealed. On the other hand, if the stop valve is designed to have the dual functions of logistics retention and sealing, then the protection of the sealing surface against the abrasion of the material passing through the stop valve as described in 113-A-4,514, 29 The measuring system can be applied without difficulty. Description of component symbols: 10 stop valve, 12 discharge opening, 14 hopper, 16 main seat, 18 flange, 20 sealing surface, 22 seal ring, 24 flow slot, 26 seat body, 28 screen, 30 ring frame, 32 intermediate plate, and 34 flow outlet. Consumption cooperation Du printed 36 Sealing surface 38 Cooling tank 40 Vice seat 42 Sealing surface 44 Sealing ring 46 Blocking device 13 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) Employees of the Intellectual Property Bureau of the Ministry of Economy Printed by the cooperative 402678 A7 f positive _: B7 supplementary. _V. Description of the invention (Hand) The first picture: a plan view of the stop valve; the second picture: the cross-sectional view through line 2-2 in the first picture; the third Figure: Partially enlarged view of the part indicated by letter B in the second figure; Figure 4: Partially enlarged view of the part indicated by letter A in the second figure; Sectional view 5; Section 6: Sectional view through line 6-6 in Section 1; Section 7: Partial plan view of the stop valve, showing an optional drive mechanism. The same reference numbers indicate the same or similar elements. The second figure shows that a stop valve (10) of the present invention is assembled to a discharge opening (12) of a shaft furnace hopper (14). The stop valve (10) includes a ring-shaped main seat (16) sealingly mounted on an annular flange (18) of the hopper (14). As can be seen in the third picture, the main seat (16) defines a concave conical sealing surface (20) and is advantageously provided with an elastic sealing ring (22). It should be noted that the flow section of the main seat (16) is larger than the flow section of the discharge opening (I2) of the feed hopper (I4). The main seat (16) is positioned so that it is hidden behind the stream passing through the discharge opening (12) in the open position of the stop valve (10). The gas stop valve must be operated in a very hot environment-especially if the stop valve is used as part of a shaft furnace's discharge installation-the elastomeric seal must be cooled to increase its service life. For this purpose, a flow groove (24) for providing cooling liquid is provided in the annular seat body (26) of the main seat (16). 8 This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Pack! —Order-!-Turn

40267R

V. Description of the invention (/ 48 50 52 54 56 58 Plate gaps Seal surface Upper surface Lower surface Empty clearance Printed by the Ministry of Economic Affairs Intellectual Property Bureau Employee Consumer Cooperative 60 Support rod 62 First shaft 64 Forked rod 66 Hollow shaft 68 Sleeve 70 box 72 Sleeve 74 Rotary shaft 76 Hydraulic jack 76 'Motor 77 Hydraulic jack 78 Connector 80 Connection socket 88 Fork joint 90 Sleeve 92 U-shaped hook 96 Bolt 97, 98, 100 Rotary joint 14 Paper Standards are applicable to China National Standard (CNS) A4 specifications (210 X 297 mm) (Please read the precautions on the back before filling this page) Binding --------- Line

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, a screen (28) for reducing the flow cross section is pressed onto the main seat (16). In particular, the screen (28) includes an annular frame (30) and an intermediate plate (32). The middle plate (32) is provided with an outflow port (34) that is smaller than the flow cross section of the discharge opening (12) of the feed hopper (14). If a stream with a circular cross section is required, the outflow port (34) can be designed with a circular cross section. The intermediate plate (32) is movably fixed to the ring frame (30), so that it can be replaced after wear or when the flow section of the screen (28) needs to be changed. As best seen in the third figure, the ring frame (30) defines a convex spherical ring-shaped sealing surface (36). The convex spherical ring (36) is matched with the concave conical ring (22) of the main seat (16), regardless of any defects in the direction between the screen (28) and the main seat (16), it is guaranteed that the joint (22) ) The horizontal plane has a circular contact line. Like the main seat (16), the ring frame (30) may also be provided with a flow channel (38) for providing cooling liquid. On the opposite side of the sealing surface (36), the ring frame (30) of the screen (28) has One vice seat (40). As can be seen in the fourth figure, the sub seat (40) defines a concave conical sealing surface (f42) and is advantageously provided with an elastic sealing ring (44). cool down. The blocking device (46) is pressed on the sub seat (40). The blocking device includes a plate (48) provided with a projection (50), which is substantially hollow in shape. As can be seen in the fourth figure, the protrusion (50) defines a convex spherical annular sealing surface (52). The convex sphere 9-r, 'installed ----- ί I ordered --------- aunt (please read the precautions on the back before filling this page) This paper size is applicable to national standards (CNS) ) A4 size (210 X 297 mm) 402678 V. Description of the invention (丨 3) 102 Bolt 104 Bolt 106 Projection A7 B7

------------- ί Install --------- Order --------- Record (Please read the notes on the back before filling this page) Ministry of Economic Affairs Printed by the Intellectual Property Bureau's Employee Cooperative Cooperative 15 Printed on a paper size applicable to national standards (CNS> A4 size (210 x 297 mm) 6402678 A7 B7. Year r Printed by the Intellectual Property Bureau's Consumer Cooperative Society of the Ministry of Economic Affairs (The ring (52) cooperates with the concave conical ring (42) of the sub seat (40), regardless of any defect in the direction between the blocking device (46) and the sub seat (40), so that the joint (44) The horizontal plane has a circular contact surface. The second figure shows the blocking valve in the closed position, in which the blocking device (46) is accommodated in the sub-seat (40) of the screen (28), and the screen ( 28) received in the main seat (16). It should be noted that there is an empty gap (58) between the lower surface (56) of the screen (28) and the upper surface (54) of the plate (48) ). The height h of the empty gap (58) is preferably larger than the diameter of the largest particle of the material passing through the stop valve. This can prevent particles from being squeezed between the blocking device (46) and the screen (28) and damaging the stop valve (1〇) or It cannot be closed. In order to open the stop valve (10), the blocking device (46) can be simply pivoted to a lateral position on the outside of the stream that flows through the discharge opening (12) of the feed hopper (14). Here In position, the material contained in the feed hopper (14) flows through the outlet (34) of the screen (28). Given that the flow cross-section of the outlet (34) is smaller than the discharge opening (12) of the feed hopper (14) The screen (28) plays a role of blocking the flow and slows down the discharge from the feed hopper (H). If the speed of the discharge of the feed hopper 04) needs to be increased, as long as the screen (28) is pivoted to the position from the feed hopper (14) The position of the side outside the #flow flowing through the discharge opening is sufficient. From the first figure, a preferred embodiment of the mechanism for driving the blocking device (46) and the screen (28) can be understood in detail. The blocking The device (46) is supported by a support rod (60) mounted on a first shaft (62). The partition (28) is supported by a fork-shaped rod (64) mounted on a hollow shaft (66) (66) Set on one end of the first shaft (62). These two shafts (62) and (This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 %). · .. 'installed ------ >! order --------- scale (please read the precautions on the back before filling this page) 403678 A7 B7 MJ. Description of the invention (/) 66) Two sleeves (68), (72) supported on a closed box (70) around the stop valve (10). They have a The plane is located on the side of the main seat (16). The two shafts (62), (66) have their own drive motors. This motor can be, for example, hydraulic jacks (76) and (77), or it can be a rotary motor. In the embodiment of the seventh figure, the two shafts (62) and (66) are provided with only a single motor (76 '). The motor (76 ') drives the shaft (62), i.e. the blocking device (46), to rotate about the shaft (74). The second motor is replaced by a connector (78). The device includes a connection socket (80), so that it can be in a first connection position. When the blocking device (46) is accommodated in the auxiliary seat of the screen (28), the hollow shaft (66) and the first The shaft (62) is locked; and in a second connection position, when the screen (28) is accommodated in the main seat (16), the hollow shaft (66) and the box (70) are locked. As a result, in the first position, the blocking device (46) and the screen (28) can be rotated together about the shaft (74); while in the second position, the screen (28) can be locked to the main Block (16). In order for the blocking device (48) and the screen (28) to be positioned tightly on their respective bases, a universal > directional suspension is provided between each pair of rain elements. These gimbal type suspensions allow the blocking device (46) and the screen (28) to be freely positioned on their corresponding conical seats. The second figure illustrates a gimbal suspension of the blocking device (46). It includes a fork joint (88) between the blocking device (46) and the support rod (60). The fork joint (88) uses a special shaft sleeve (90). A U-shaped hook pin (92) in the shaft sleeve (90) can not only (please read the precautions on the back before filling this page). !! -PI —Order! I ---- Read the paper printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (21〇X 297 male cage) m 402678 A7 B7 month 丨 repair 丨 board;. Economic Printed by the Consumer Cooperative of the Ministry of Intellectual Property Bureau. 5. Description of the invention (〖σ) Rotating around its own axis can also be positioned obliquely with the axis of the sleeve (90). For this purpose, for example, the The hole system defines a generally bulging ring-shaped surface. Of course, the fork joint (88) can also be replaced by a spherical support. The fifth figure shows three limit bolts that are supported on the support rod (60). (96). The function of the bolt is to limit the possible vibration of the gimbal suspension to the blocking device (46). The first figure depicts a gimbal suspension of the screen (28). It includes a A suspension of a screen (28) of a rotary joint (97) (98) provided on a fork rod (64), and a rotary joint (100) of a fork rod (64) on a hollow shaft (66). First And Figure 5 shows that two bolts (102) can restrict the pivoting of the fork rod (64) about its joint (100) It can be seen in the sixth figure that two bolts (104) arranged oppositely on both sides of the projection (106) of the screen (28) restrict the pivot of the screen (28) with respect to the rotary joints (97) and (98). If, in the blast furnace, coke is discharged from the feed hopper (14) through the stop valve (10), the blocking device (46) and the screen (28) are simply pivoted to the discharge located at the feed hopper (04). The lateral position outside the stream through which the opening (12) flows. If, on the other hand, pellets, ore or other fine products are to be discharged from the hopper (M) through the stop valve (10), the blocking device (46) is simply pivoted to its side position, and the screen (28) remains in the main seat (16). The intermediate plate (32) has a smaller flow cross-section than the discharge opening (12) of the feed hopper (14), which slows down the discharge of fine products from the feed hopper (14). It should also be noted that the stop valve can also be designed to have a simple material. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (2.10 X 297 mm). --------- Aunt (Please read the notes on the back before filling this page) A7 B7

402678 V. Description of the invention (//) Please read the notes on the back side and then fill out this page. The retaining valve is not sealed. On the other hand, if the stop valve is designed to have the dual functions of logistic retention and sealing, then the method described in 113-A-4,514, 29 is used to protect the sealing surface from the abrasion of the material passing through the stop valve. The measuring system can be applied without difficulty. Description of component symbols: 10 stop valve, 12 discharge opening, 14 hopper, 16 main seat, 18 flange, 20 sealing surface, 22 seal ring, 24 flow slot, 26 seat body, 28 screen, 30 ring frame, 32 intermediate plate, and 34 flow outlet. Consumption cooperation Du printed 36 Sealing surface 38 Cooling tank 40 Vice seat 42 Sealing surface 44 Sealing ring 46 Blocking device 13 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

40267R

V. Description of the invention (/ 48 50 52 54 56 58 Plate gaps Seal surface Upper surface Lower surface Empty clearance Printed by the Ministry of Economic Affairs Intellectual Property Bureau Employee Consumer Cooperative 60 Support rod 62 First shaft 64 Forked rod 66 Hollow shaft 68 Sleeve 70 box 72 Sleeve 74 Rotary shaft 76 Hydraulic jack 76 'Motor 77 Hydraulic jack 78 Connector 80 Connection socket 88 Fork joint 90 Sleeve 92 U-shaped hook 96 Bolt 97, 98, 100 Rotary joint 14 Paper Standards are applicable to China National Standard (CNS) A4 specifications (210 X 297 mm) (Please read the precautions on the back before filling this page) Binding --------- line 402678 V. Description of the invention (丨 3) 102 bolt 104 bolt 106 protrusion A7 B7

------------- ί Install --------- Order --------- Record (Please read the notes on the back before filling this page) Ministry of Economic Affairs Printed by the Intellectual Property Bureau's Consumer Cooperatives 15 This paper size applies the national standard of the country (CNS> A4 specification (210 x 297 mm)

Claims (1)

402678 6. Application patent scope 1. A material retention stop valve, which is assembled at the discharge opening of the feeding hopper (M). 2) 'The stop valve system includes: a main seat (16), which is provided with a Outlet for discharging the contents of the feed hopper; a movable plugging device (46); and a drive mechanism adapted to drive the plugging device (46) at a stop to stop discharging from the feed hopper (14) Position, and an open position that allows material to flow through the main seat (16); it is characterized by: a screen (28) 'which is used to reduce the flow cross-section of the main seat (16); and The driving mechanism is adapted to drive the screen (28) at a first position that cooperates with the main seat (16) to reduce the latter's flow section, and a second position that completely releases the flow section of the main seat (16) Between locations. 2. The stop valve according to item 1 of the scope of the patent application, wherein the screen (28) includes a circular outflow port (34) for the material to flow out. 3. The stop valve as described in item 1 of the scope of patent application, wherein the main seat (16) is suitable for containing the screen (28); the screen (28) defines a secondary seat (40), Is suitable for accommodating the blocking device (46); therefore, in the closed stop valve, the screen (28) is accommodated in the main seat (16), and the blocking device (46) is accommodated in In the sub seat (40). 4. The stop valve as described in item 3 of the scope of patent application, in which the screen size of 1 screen is applicable to China National Standard (CNS) A4 (210 X 297 mm) (please read the precautions on the back before filling in (This page) -------- Order --------- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 402678 6. Application patent scope 1. A material retention stop valve, which is assembled at the discharge opening of the feeding hopper (M). 2) 'The stop valve system includes: a main seat (16), which is provided with a Outlet for discharging the contents of the feed hopper; a movable plugging device (46); and a drive mechanism adapted to drive the plugging device (46) at a stop to stop discharging from the feed hopper (14) Position, and an open position that allows material to flow through the main seat (16); it is characterized by: a screen (28) 'which is used to reduce the flow cross-section of the main seat (16); and The driving mechanism is suitable for driving the screen (28) at a first position which cooperates with the main seat (16) to reduce the latter's flow section, and a second position which completely releases the flow section of the main seat (16). Between locations. 2. The stop valve according to item 1 of the scope of the patent application, wherein the screen (28) includes a circular outflow port (34) for the material to flow out. 3. The stop valve as described in item 1 of the scope of patent application, wherein the main seat (16) is suitable for containing the screen (28); the screen (28) defines a secondary seat (40), Is suitable for accommodating the blocking device (46); therefore, in the closed stop valve, the screen (28) is accommodated in the main seat (16), and the blocking device (46) is accommodated in In the sub seat (40). 4. The stop valve as described in item 3 of the scope of patent application, in which the screen size of 1 screen is applicable to China National Standard (CNS) A4 (210 X 297 mm) (please read the precautions on the back before filling in (This page) -------- Order --------- 40S678 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Filling 6. The scope of patent application (28) includes a ring frame (30 ) And an intermediate plate (32), the intermediate plate (32) includes a flow outlet (34) having a smaller flow cross-section than the main seat (16), and is fixed to the ring frame (30) in a replaceable manner. ) On. 5. The blocking valve according to item 3 of the scope of patent application, wherein the screen (28) has a spherical sealing surface (36), and in the closed position of the blocking valve, the spherical sealing surface is connected to the main valve. The conical sealing surface (22) of the seat (16) cooperates to provide a tight seal. 6. The block valve according to item 3 of the scope of patent application, wherein the blocking device (46) has a spherical sealing surface (52), and in the closed position, the spherical sealing surface is connected to the sub seat (40) ) 'S conical sealing surface (42) cooperates to provide a tight seal. 7. The stop valve according to item 5 of the scope of patent application, wherein an elastic sealing ring (22) (44) is received on the conical sealing surface of the main seat (16) and / or the sub seat (40). 8. The stop valve according to item 3 of the scope of patent application, wherein the blocking device (46) comprises a plate (48) 'the plate has a protrusion (50) located on the sub seat (40) So that an empty gap (58) remains between the screen (28) and the blocking device (46), the empty gap (58) having a diameter larger than the maximum particle diameter of the material discharged through the stop valve Height (h). 9. The stop valve as described in any one of items 1 to 8 of the scope of patent application, wherein the flow section of the main seat (16) is larger than the discharge of the feed hopper (14). Standard (CNS) A4 size (210 x 297 public love) (Please read the precautions on the back before filling out this page) Installation—! 111 Order ·! Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed A8 Lie 2678 1 VI. Patent application openings (12); and '; The screen (28) defines a ratio of the feed hopper ( 14) The flow section of the discharge opening is small. 10. The blocking valve according to any one of items 1 to 8 of the scope of the patent application, wherein the drive mechanism for the blocking device (46) and / or the screen (28) includes a pivot bearing The rod (60) (64), which has a pivot axis, is positioned laterally relative to the main seat (16) in a plane substantially perpendicular to the logistics axis. 1 1 · The stop valve according to item 10 of the scope of patent application, wherein the support rod (60) for the blocking device (46) and the support rod (64) for the screen (28) are provided with The same pivot axis. 1 2 · The stop valve as described in item 10 of the scope of patent application, wherein the universal joint is a suspension of the blocking device (46) or the screen (28). 1 3 · The stop valve according to item 12 of the scope of patent application, wherein a motor (76 °) is a support rod (60) connected to the blocking device (46); and a connection device (78), which Is adapted to be mechanically connected to the support rod (64) of the screen (28) or to the drive motor (" 760, so that the screen (28) is moved together with the blocking device (46) 'or It is connected with the base body (70) fixedly attached to the main base (16), so that the screen is locked on the main base (16) "1 4. The stop valve described in any one of the above items, of which 3 (Please read the precautions on the back before filling out this page) Loading ----- Γ II Order--------- Auntie paper size is applicable to China Standard < CNS) A4 specification (210 X 297 mm) 6. Scope of patent application: A set of movable screens, which are used to reduce the flow cross-section. These partitions define increasingly smaller flow cross-sections; And a driving mechanism, which is suitable for driving each screen between a first position and a second position, and in the first position, the screen reduces the flow through the feeding hopper The flow cross-section of the flow of the stop valve, and the second position is such that it does not affect the flow of material from the feed hopper through the stop valve. 1 5 · The stop valve according to item 14 of the scope of patent application, wherein the main seat is Place the sieve with the largest flow cross section in it; each sieve defines a pair of seats that house the sieve with the smaller flow cross section that is tightly grounded; and the last with the smallest flow cross section The sieve screen has a sub seat that can accommodate the blocking device. I --------Install --------- Order --------- Aunt (Please read the note on the back first Please fill in this page again) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 4 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)