Spraying maintenance device for concrete box girder

Abstract

The utility model discloses a concrete box girder spraying maintenance device which comprises a water pool, and a spraying assembly and a telescopic nozzle which are used for spraying are installed on the top of the water pool and the outer walls of the two sides of the water pool respectively. The spraying assembly comprises a spraying pipe and a fixed nozzle, a plurality of supports arranged linearly are installed at the top of the pool, a water pump used for draining water is installed at one end of each support, a water inlet pipe communicated with the inner wall of the pool and used for water inflow is installed at one end of each water pump, and the spraying pipes are installed on the wall faces, opposite to the water pumps, of the supports. And the fixed nozzles are circumferentially arranged on the outer wall of the spraying pipe and are communicated with the inner wall of the spraying pipe. By means of the plugging assembly and the sealing assembly, external impurities are prevented from entering the fixed spray head when the fixed spray head is placed, the fixed spray head is prevented from being blocked, the fixed spray head is sealed through inflation of the sealing air bag, and the situation that the impurities block the fixed spray head, water flow spraying is affected, and maintenance of the box girder is affected is further avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying and curing, in particular to a concrete box beam spraying and curing device. Background Art

[0002] Precast box girders are a type of beam used in bridge construction. They are hollow inside with flanges on either side, resembling a box, hence their name. Precast box girders are classified into two main types based on their material: prestressed reinforced concrete box girders and steel box girders. After the concrete box girders are fabricated, they require spraying and curing equipment.

[0003] However, current spray equipment has nozzle protection defects when not in operation. The nozzle area lacks an adjustable sealing device, making it impossible to achieve adaptive switching between the working state and the idle state. During the storage of the equipment, pollutants such as external dust easily invade the interior of the nozzle, reacting physically and chemically with residual moisture to form sediments, causing the nozzle holes to gradually become clogged. This structural defect not only reduces the efficiency of water flow, but also directly affects the uniformity and continuity of box girder concrete curing. Therefore, the utility model provides a concrete box girder spray curing device to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to provide a concrete box girder spraying and curing device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A concrete box beam spray curing device comprises a water pool, wherein a spray assembly and a telescopic spray head for spraying are respectively installed on the top and the outer walls of both sides of the water pool; the spray assembly comprises a spray pipe and a fixed spray head, a plurality of linearly arranged brackets are installed on the top of the water pool, a water pump for water drainage is installed at one end of the bracket, an inlet pipe connected to the inner wall of the water pool for water intake is installed at one end of the water pump, the spray pipe is installed on the wall opposite to the bracket and the water pump, the fixed spray heads are circumferentially arranged and installed on the outer wall of the spray pipe and are connected to the inner wall of the spray pipe; a partition plate is installed on the inner wall of the fixed spray head, and a cylindrical A control tube is provided, and a plurality of water holes for water to flow through are opened on the outer wall of the partition plate. A sealing assembly for sealing the fixed nozzle is installed in the control tube, and the sealing assembly includes a closing plate slidably connected to the axis position of the control tube to close the fixed nozzle. The sealing assembly also includes a sealing airbag installed on the top of the closing plate to seal the fixed nozzle by inflation; a driving assembly for driving the movement of the closing plate and inflating and deflating the sealing airbag is installed in the control tube, and a reset assembly for assisting the resetting of the driving assembly is installed at the bottom of the control tube; a blocking assembly for controlling the opening and closing of the water holes by moving the closing plate is installed on the top of the partition plate.

[0007] As a further solution of the present invention, the driving assembly includes a transmission rod and a pressure plate. A sleeve partition for separating the internal space of the control tube is fixedly connected to the middle position of the inner wall of the control tube. The transmission rod is fixedly connected to the bottom axis position of the closing plate and is slidably connected to the inner wall of the partition plate. The pressure plate is fixedly connected to the middle position of the outer wall of the transmission rod. A plurality of water inlet holes for water flow through are opened at the top of the outer wall of the control tube.

[0008] As a further solution of the present invention, the drive assembly also includes a vent pipe and a piston plate. The bottom end of the transmission rod is fixedly connected to the piston plate, the piston plate is slidably connected to the inner wall of the control tube, the vent pipe is fixedly connected to the inner wall of the transmission rod, the top of the vent pipe is connected to the sealed airbag, and a vent hole is opened at the bottom of the vent pipe.

[0009] As a further solution of the present invention, the reset assembly includes a buoy plate, a sliding sleeve, a counterweight ring and a lifting rope. The sliding sleeve is slidably connected to the inner wall of the control tube, the buoy plate is fixedly connected to the bottom position of the sliding sleeve, the counterweight ring is fixedly connected to the bottom end position of the buoy plate, and the lifting rope is installed at both ends of the top of the buoy plate.

[0010] As a further solution of the present invention, turning rods are installed at both ends of the bottom of the partition plate, and the lifting rope is passed around the outer wall of the turning rod and the tail end is installed at both ends of the top of the pressure plate.

[0011] As a further solution of the present invention, the inner wall of the partition plate is slidably connected to a connecting rod, and the top and bottom ends of the connecting rod are fixedly connected to a pressure ring and a sealing ring respectively.

[0012] As a further solution of the present invention, the blocking assembly includes a blocking plate and a connecting rod. The blocking plate is slidably connected to the bottom outer wall of the partition plate, and the connecting rod is rotatably connected to the blocking ring and the wall surface opposite to the blocking plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. When the utility model is used, the blocking assembly and the sealing assembly are provided, which can be blocked by the blocking plate and the closing plate after the spraying is completed, so as to keep the fixed nozzle closed, and prevent external impurities from entering the fixed nozzle when the fixed nozzle is placed, causing the fixed nozzle to be blocked, and the fixed nozzle is sealed by inflating the sealing airbag, further preventing impurities from clogging the fixed nozzle, affecting the spraying of water flow and affecting the maintenance of the box girder.

[0015] 2. When the utility model is used, the reset assembly and the drive assembly are provided, which can drive the pressure plate to reset through the float plate, and can make the water in the control pipe flow out through the squeezing of the pressure plate to flush the fixed nozzle, so as to keep the fixed nozzle clean and avoid impurities clogging the fixed nozzle and affecting the spraying and maintenance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a structural diagram of a concrete box girder spray curing device.

[0017] Figure 2 The figure is a structural schematic diagram of a spraying component in a concrete box girder spray curing device.

[0018] Figure 3 This is a cross-sectional view of the fixed nozzle in a concrete box girder spray curing device.

[0019] Figure 4 This is a cross-sectional view of the sealing component and driving component in a concrete box girder spray curing device.

[0020] Figure 5 This is a cross-sectional view of the reset component in a concrete box girder spray curing device.

[0021] Figure 6 This is a cross-sectional view of the other side of a reset component in a concrete box girder spray curing device.

[0022] Figure 7 This is a cross-sectional view of a sealing component in a concrete box girder spray curing device.

[0023] In the figure: 100, water tank; 110, telescopic nozzle; 120, bracket; 121, water inlet pipe; 122, spray pipe; 123, fixed nozzle; 124, water pump;

[0024] 200, separator; 201, water hole; 202, water inlet hole; 210, control pipe; 220, casing partition;

[0025] 300, closing plate; 310, sealing airbag; 311, vent pipe; 312, vent hole; 320, transmission rod; 321, pressure plate; 322, piston plate;

[0026] 400, buoy plate; 410, sliding sleeve; 420, counterweight ring; 430, lifting rope; 431, steering rod;

[0027] 500, pressure ring; 501, connecting rod; 502, return spring; 503, blocking ring; 510, blocking plate; 511, guide rod; 512, connecting rotating rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 and Figure 2 In an embodiment of the present invention, a concrete box beam spray curing device includes a water pool 100, and a spraying assembly and a telescopic spray head 110 for spraying are respectively installed on the top and the outer walls of both sides of the water pool 100;

[0030] The spray assembly includes a spray pipe 122 and a fixed nozzle 123. A plurality of linearly arranged brackets 120 are installed on the top of the pool 100. A water pump 124 for water drainage is installed at one end of the bracket 120. An inlet pipe 121 for water intake is installed at one end of the water pump 124 and is connected to the inner wall of the pool 100. The spray pipe 122 is installed on the wall opposite to the bracket 120 and the water pump 124. The middle of the spray pipe 122 is arc-shaped, and the fixed nozzles 123 are arranged in a circular manner. The outer wall of the spray pipe 122 is connected to the inner wall of the spray pipe 122. When spraying is required, the telescopic nozzle 110 is used for spraying, and the water pump 124 is started. The water flow in the pool 100 can enter the inner wall of the spray pipe 122 through the water inlet pipe 121, and then spray from the fixed nozzle 123. The spray pipe 122 is arc-shaped, and the water flow can be sprayed in a fan shape. Then, the box girder is sprayed and maintained through the telescopic nozzle 110 and the fixed nozzle 123;

[0031] See Figure 3 The inner wall of the fixed nozzle 123 is equipped with a partition plate 200, which divides the two ends of the fixed nozzle 123 into two chambers. The chamber at the bottom of the tail end is used to transport water, and the chamber at the top is used to spray water. The inner cavity of the chamber at the top is truncated cone-shaped. A cylindrical control tube 210 is installed at the bottom of the partition plate 200. The outer wall of the partition plate 200 is provided with a plurality of water holes 201 for water flow. A sealing component for sealing the top chamber of the fixed nozzle 123 is installed in the control tube 210. The sealing assembly includes a closing plate 300 that is slidably connected to the axis of the control tube 210 to close the top chamber of the fixed nozzle 123. The sealing assembly also includes a sealing airbag 310 installed on the top of the closing plate 300 to seal the top chamber of the fixed nozzle 123 by inflation. The top chamber of the fixed nozzle 123 is designed in a truncated cone shape. The top chamber of the fixed nozzle 123 can be sealed by moving the closing plate 300 upward, and the top chamber of the fixed nozzle 123 is further sealed by inflating the sealing airbag 310.

[0032] A drive assembly is installed in the control tube 210 to drive the closing plate 300 to move and to inflate and deflate the sealing airbag 310. A reset assembly is installed at the bottom of the control tube 210 to assist in resetting the drive assembly. The drive assembly and the reset assembly are used to move the closing plate 300 up and down and to inflate and deflate the sealing airbag 310 simultaneously.

[0033] A blocking component is installed on the top of the partition plate 200 to control the opening and closing (ie, opening and closing) of the water hole 201 by moving the closing plate 300.

[0034] See Figure 3 and Figure 4 The driving assembly includes a transmission rod 320 and a pressure plate 321. A casing partition 220 for separating the internal space of the control tube 210 is fixedly connected to the middle position of the inner wall of the control tube 210. The control tube 210 is located in the top chamber of the casing partition 220 for water storage, and the control tube 210 is located in the bottom chamber of the casing partition 220 for gas storage. A first sliding hole is opened at the axis position of the partition plate 200. The first sliding hole extends to the inner wall of the control tube 210 and passes through the casing partition 220. The transmission rod 320 is fixedly connected to the axis position of the bottom end of the closing plate 300 and is slidably connected to the inner wall of the first sliding hole at the partition plate 200. The pressure plate 32 1 is fixedly connected to the middle position of the outer wall of the transmission rod 320 and is located at the top position of the sleeve partition 220. The top of the outer wall of the control tube 210 is provided with a plurality of water inlet holes 202 for water flow. The water inlet holes 202 are located at the top position of the pressure plate 321. When the water flows into the fixed nozzle 123, the water flow is blocked by the partition plate 200. The water flow can pass through the water inlet holes 202 and enter the inner wall of the control tube 210. The water flow can squeeze the pressure plate 321 under the pressure of gravity and water pressure. The pressure plate 321 is squeezed and moves downward. The sealing plate 300 is driven downward by the transmission rod 320, thereby releasing the seal on the top chamber of the fixed nozzle 123.

[0035] The driving assembly also includes a vent pipe 311 and a piston plate 322. The bottom end of the transmission rod 320 is fixedly connected to the piston plate 322. The piston plate 322 is slidably connected to the inner wall of the control tube 210 and is located at the bottom of the sleeve partition 220. A fixed cavity is opened in the transmission rod 320. The vent pipe 311 is fixedly connected to the inner wall of the fixed cavity at the transmission rod 320. The top of the vent pipe 311 is connected to the sealed airbag 310. The bottom of the vent pipe 311 is provided with a vent hole 312. The vent hole 312 passes through On the outer wall of the transmission rod 320, the vent hole 312 is located between the sleeve partition 220 and the piston plate 322. When the transmission rod 320 moves downward, the piston plate 322 can be driven to move downward synchronously. The movement of the piston plate 322 can increase the space between the sleeve partition 220 and the piston plate 322. At this time, the gas in the sealing airbag 310 can be extracted through the vent pipe 311 and the vent hole 312, reducing the volume of the sealing airbag 310, and then releasing the seal on the top chamber of the fixed nozzle 123.

[0036] See Figure 5 The reset component includes a buoy plate 400, a sliding sleeve 410, a counterweight ring 420 and a lifting rope 430. An annular sliding groove is provided at the bottom of the outer wall of the control tube 210. The sliding sleeve 410 is slidably connected to the inner wall of the sliding groove on the control tube 210. The buoy plate 400 is fixedly connected to the bottom position of the sliding sleeve 410. The counterweight ring 420 is fixedly connected to the bottom end position of the buoy plate 400. Both ends of the top of the buoy plate 400 are equipped with first lifting ears. The lifting rope 430 is installed on the inner wall of the first lifting ear on the buoy plate 400. When the water flow enters the inner wall of the fixed nozzle 123, the water flow can drive the buoy plate 400 to float up. The buoy plate 400 can slide in the sliding groove on the control tube 210 through the sliding sleeve 410. When there is no water in the fixed nozzle 123, the buoy plate 400 can be driven to move down and reset under the gravity of the counterweight ring 420.

[0037] See Figure 6 Two first fixed plates are installed at both ends of the bottom of the partition plate 200, and a steering rod 431 is installed between the two first fixed plates on the same side. Second lifting ears are installed at both ends of the top of the pressure plate 321. The lifting rope 430 passes through the control tube 210, the piston plate 322, the casing partition 220, and the pressure plate 321. The lifting rope 430 bypasses the outer wall of the steering rod 431 and the tail end is installed on the inner wall of the second lifting ear. When the buoy plate 400 moves up, the lifting rope 430 can be driven to move up and relax, thereby releasing the limit on the pressure plate 321. When the buoy plate 400 moves down, the pressure plate 321 can be pulled by the lifting rope 430, and then the pressure plate 321 can be driven to move up and reset.

[0038] See Figure 7The partition plate 200 is provided with a plurality of second sliding holes arranged in a circumference, and the inner wall of the second sliding hole is slidably connected with a connecting rod 501, and the top and bottom ends of the connecting rod 501 are fixedly connected to a pressure ring 500 and a blocking ring 503 respectively. The blocking ring 503 has an L-shaped cross section, and a return spring 502 is sleeved on the outer wall of the connecting rod 501. The two ends of the return spring 502 are fixedly connected to the opposite wall surfaces of the pressure ring 500 and the partition plate 200. When the closing plate 300 moves down to the bottom end, the pressure ring 500 can be squeezed at this time. When the pressure ring 500 is squeezed, the blocking ring 503 can be driven downward by the connecting rod 501, and the blocking ring 503 can block the water inlet hole 202. When the closing plate 300 moves up, the pressure ring 500 and the blocking ring 503 can be reset under the elastic force of the return spring 502.

[0039] The blocking assembly includes a blocking plate 510 and a connecting rotating rod 512. The bottom of the partition plate 200 is fixedly connected to a second fixed plate at both ends of the water hole 201. The second fixed plate is fixedly connected to the wall opposite to the second fixed plate. The blocking plate 510 is slidably connected to the outer wall of the guide rod 511 at the bottom of the partition plate 200. The diameter of the blocking plate 510 is larger than the diameter of the water hole 201. A rotating seat is installed on the wall opposite to the blocking ring 503 and the blocking plate 510. The connecting rotating rod 512 is rotatably connected to the blocking ring 503 and the blocking plate 510. When the blocking ring 503 moves downward, the blocking plate 510 can be driven to move by rotating the rotating rod 512 connected thereto. The blocking plate 510 is slidably connected to the outer wall of the guide rod 511, which can limit the movement of the blocking plate 510. Then, the blocking plate 510 is driven to move out of the water hole 201 by rotating the connecting rotating rod 512, and the water flow can pass through the water hole 201 for spraying. When the blocking ring 503 moves upward, the blocking plate 510 can be driven to reset by the connecting rotating rod 512 to block the water hole 201.

[0040] The working principle of the present invention is as follows: when spraying is required, the box girder is moved to the water pool 100, the box girder is sprayed through the telescopic nozzle 110, and the water pump 124 is turned on. The water flow in the water pool 100 can pass through the water inlet pipe 121 and the spray pipe 122 and the fixed nozzle 123 to spray the box girder for curing;

[0041] When water flows through the spray pipe 122 and enters the fixed nozzle 123, the buoyancy of the water on the buoy plate 400 can drive the buoy plate 400 to move upward, and the buoy plate 400 can drive the suspension rope 430 to loosen and release the limit on the pressure plate 321. Under the closure of the water hole 201 by the sealing plate 510, water can enter the control pipe 210 through the water inlet hole 202 to squeeze the pressure plate 321 downward. The downward movement of the pressure plate 321 can drive the closing plate 300 to move downward through the transmission rod 320 to release the closure on the top of the fixed nozzle 123. At this time, the transmission rod 320 drives the piston plate 322 to move downward to increase the distance between the piston plate 322 and the sleeve partition 220. The gas in the sealing airbag 310 can enter between the sleeve partition 220 and the piston plate 322 through the vent pipe 311 and the vent hole 312, and the sealing airbag 310 can release the seal on the fixed nozzle 123.

[0042] When the closing plate 300 moves down to the bottom, the pressure ring 500 is squeezed to drive the blocking ring 503 to move down. The blocking ring 503 can then drive the blocking plate 510 to move out of the water hole 201 by rotating the connecting rod 512. At this time, water can flow through the water hole 201 and be sprayed through the fixed nozzle 123.

[0043] When the spraying is completed, the buoy plate 400 is no longer subject to buoyancy, and the buoy plate 400 can be driven downward by the gravity of the counterweight ring 420. At this time, the pressure plate 321 is pulled by the sling 430 to reset the pressure plate 321, the transmission rod 320, the closing plate 300 and the sealing airbag 310, and the gas is squeezed by the piston plate 322 to drive the gas into the sealing airbag 310 for filling. The closing plate 300 moves upward to seal the fixed nozzle 123, and the sealing airbag 310 is inflated and expanded to seal the fixed nozzle 123. Under the elastic force of the reset spring 502, the sealing ring 503 is reset, and the sealing plate 510 is driven to seal the water hole 201.

[0044] When the pressure plate 321 moves upward, the water at the top of the control tube 210 can be squeezed, and the water flow can pass through the water inlet hole 202 to flush the fixed nozzle 123.

[0045] When the utility model is used, the blocking component and the sealing component are set, and after the spraying is completed, the blocking plate 510 and the closing plate 300 can be used to block the fixed nozzle 123, so as to prevent external impurities from entering the fixed nozzle 123 when the fixed nozzle 123 is placed, causing the fixed nozzle 123 to be blocked, and the fixed nozzle 123 is sealed by inflating the sealing airbag 310, further preventing impurities from blocking the fixed nozzle 123, affecting the spraying of water flow and thus affecting the maintenance of the box girder.

[0046] Through the reset component and drive component, the buoy plate 400 can drive the pressure plate 321 to reset, and the water in the control tube 210 can be squeezed out through the pressure plate 321 to flush the fixed nozzle 123, thereby keeping the fixed nozzle 123 clean and avoiding impurities from clogging the fixed nozzle 123 and affecting the spraying and maintenance effect.

[0047] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concrete box beam spray curing device, comprising a water tank (100), characterized in that: The top and both side outer walls of the pool (100) are respectively equipped with a spraying assembly and a telescopic spray head (110) for spraying; The spray assembly includes a spray pipe (122) and a fixed nozzle (123). A plurality of linearly arranged brackets (120) are installed on the top of the pool (100). A water pump (124) for draining water is installed at one end of the bracket (120). An inlet pipe (121) connected to the inner wall of the pool (100) for water intake is installed at one end of the water pump (124). The spray pipe (122) is installed on the wall opposite to the bracket (120) and the water pump (124). The fixed nozzles (123) are circumferentially arranged and installed on the outer wall of the spray pipe (122) and are connected to the inner wall of the spray pipe (122). A partition plate (200) is installed on the inner wall of the fixed nozzle (123), a cylindrical control tube (210) is installed on the bottom of the partition plate (200), a plurality of water holes (201) for water flow are opened on the outer wall of the partition plate (200), a sealing assembly for sealing the fixed nozzle (123) is installed in the control tube (210), the sealing assembly includes a sealing plate (300) slidably connected to the axis position of the control tube (210) to seal the fixed nozzle (123), and the sealing assembly also includes a sealing airbag (310) installed on the top of the sealing plate (300) to seal the fixed nozzle (123) by inflation; A driving assembly for driving the closing plate (300) to move and inflating and deflating the sealing airbag (310) is installed in the control tube (210), and a reset assembly for assisting the reset of the driving assembly is installed at the bottom of the control tube (210); A blocking component is installed on the top of the partition plate (200) for controlling the opening and closing of the water hole (201) by moving the closing plate (300).

2. A concrete box girder spray curing device according to claim 1, characterized in that: The drive assembly comprises a transmission rod (320) and a pressure plate (321); a sleeve partition (220) for separating the internal space of the control tube (210) is fixedly connected to the middle position of the inner wall of the control tube (210); the transmission rod (320) is fixedly connected to the bottom axis position of the closing plate (300) and slidably connected to the inner wall of the partition plate (200); the pressure plate (321) is fixedly connected to the middle position of the outer wall of the transmission rod (320); and a plurality of water inlet holes (202) for water flow are opened at the top of the outer wall of the control tube (210).

3. A concrete box girder spray curing device according to claim 2, characterized in that: The drive assembly further comprises a vent pipe (311) and a piston plate (322). The bottom end of the transmission rod (320) is fixedly connected to the piston plate (322). The piston plate (322) is slidably connected to the inner wall of the control tube (210). The vent pipe (311) is fixedly connected to the inner wall of the transmission rod (320). The top of the vent pipe (311) is connected to the sealing airbag (310). A vent hole (312) is provided at the bottom of the vent pipe (311).

4. A concrete box beam spray curing device according to claim 3, characterized in that: The reset assembly includes a buoy plate (400), a sliding sleeve (410), a counterweight ring (420) and a suspension rope (430), wherein the sliding sleeve (410) is slidably connected to the inner wall of the control tube (210), the buoy plate (400) is fixedly connected to the bottom position of the sliding sleeve (410), the counterweight ring (420) is fixedly connected to the bottom end position of the buoy plate (400), and the suspension rope (430) is installed at both ends of the top of the buoy plate (400).

5. The concrete box girder spray curing device according to claim 4, characterized in that: Turning rods (431) are installed at both ends of the bottom of the partition plate (200), and the suspension rope (430) is passed around the outer wall of the turning rod (431) and the tail end is installed at both ends of the top of the pressure plate (321).

6. The concrete box girder spray curing device according to claim 1, characterized in that: The inner wall of the partition plate (200) is slidably connected to a connecting rod (501), and the top and bottom ends of the connecting rod (501) are fixedly connected to a pressure ring (500) and a blocking ring (503), respectively.

7. The concrete box girder spray curing device according to claim 6, characterized in that: The blocking assembly comprises a blocking plate (510) and a connecting rod (512), wherein the blocking plate (510) is slidably connected to the bottom outer wall of the partition plate (200), and the connecting rod (512) is rotatably connected to the opposite wall of the blocking ring (503) and the blocking plate (510).

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