A concrete pump pipe shut-off valve device

Abstract

The utility model relates to the technical field of concrete stop valve, and disclose a kind of stop valve device of concrete pump pipe, including valve body and the flange plate being arranged at the both ends of valve body, the side fixedly connected with protective cover of valve body, the top end and bottom end of protective cover are equipped with guide block respectively, the quantity of guide block is two, the inside of valve body is equipped with blanking channel, the inside of two guide blocks is slidably connected with first guide rod and second guide rod respectively, the utility model provides a kind of stop valve device of concrete pump pipe, and the cooperation setting of guide block, first guide rod and blocking mechanism, when plugging in valve body, first guide rod can promote blocking mechanism to valve body inside, make blocking mechanism to carry out preliminary plugging in valve body, prevent the big particle aggregate in concrete from falling, to prevent big particle aggregate from jamming plugging mechanism.

Description

Technical Field

[0001] This utility model relates to the field of concrete shut-off valve technology, specifically to a shut-off valve device for a concrete pump pipe. Background Technology

[0002] Gate valves are the core devices for controlling fluid flow in concrete pumping pipelines, and their performance directly affects construction efficiency and safety. In scenarios such as high-rise building pouring and tunnel construction, operators need to frequently open and close valves to switch pumping paths or cut off flow in emergencies. Although gate valves, ball valves, and other structures are widely used in industrial pipelines, the high proportion of coarse aggregates (crushed stone, pebbles, etc., with particle sizes generally reaching 20-40mm) in concrete media exposes certain shortcomings of traditional valves in pumping pipeline scenarios.

[0003] Firstly, large aggregate particles can intrude into the sealing surface. When the valve is closed, the coarse aggregate in the falling concrete can easily get stuck in the gap between the valve plate and the valve seat. When the particle size is more than twice the gap between the valve seat and the valve plate, the aggregate will cause mechanical interference, preventing the valve plate from closing properly. This failure to close the valve plate will trigger a chain reaction, leading to sealing failure and creating a local gap in the sealing surface. The residual pressure in the pump pipe will continuously squeeze the cement slurry out of the gap, forming a "grout seepage channel." This not only contaminates the working surface but also accelerates the erosion and wear of the sealing ring. Therefore, a device is needed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a shut-off valve device for concrete pump pipes, which solves the problem that aggregates are easily stuck between valve plates when the existing shut-off valve is closed.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a stop valve device for a concrete pump pipe, comprising a valve body and flanges disposed at the upper and lower ends of the valve body, a protective cover fixedly connected to one side of the valve body, guide blocks respectively provided at the top and bottom ends of the protective cover, the number of guide blocks being two, and a material discharge channel opened inside the valve body; The two guide blocks are respectively guided and slidably connected to a first guide rod and a second guide rod. The first guide rod is located above the second guide rod. A blocking mechanism is provided on one side of the first guide rod. An expansion part is provided at one end of the first guide rod to prevent the first guide rod from coming out of the guide block. A sealing mechanism is provided on one side of the second guide rod. The sealing mechanism includes a sealing plate and a connecting port. The sealing plate is fixedly connected to the inner wall of the second guide rod and passes through the valve body. The connecting port is opened on one side of the surface of the sealing plate to connect the two ends of the feeding channel. The protective cover has a drive mechanism inside to drive the second guide rod to move.

[0006] Optionally, the blocking mechanism includes an extension plate, the upper surface of which is detachably connected to a replacement frame, and the bottom of the replacement frame is fixedly connected to a screen for separating stones.

[0007] Optionally, a limiting block is fixedly connected to the bottom of the inner wall of the expansion plate, and the limiting block abuts against the bottom of the replacement frame to support the replacement frame.

[0008] Optionally, the drive mechanism includes a first drive gear and a rack. The first drive gear is rotatably connected inside the protective cover via a rotating shaft. The rack is located on top of the second guide rod and meshes with the first drive gear.

[0009] Optionally, a second drive gear is fixedly connected to one side of the first drive gear, and a worm gear meshes with one side of the second drive gear. A turntable is rotatably connected to the front of the protective cover, and one end of the turntable meshes with the bottom of the worm gear through a bevel gear to drive the worm gear to rotate.

[0010] Optionally, an elastic block is fixedly connected to one end of the expansion plate near the feeding channel, and the elastic block is made of rubber.

[0011] Optionally, a sealing gasket is fixedly connected to the top of the connecting port to seal the gap between the connecting port and the feeding channel.

[0012] This utility model provides a shut-off valve device for a concrete pump pipe, which has the following beneficial effects: This utility model provides a shut-off valve device for a concrete pump pipe. Through the coordinated arrangement of a guide block, a first guide rod, and a blocking mechanism, when the valve body is being sealed, the first guide rod pushes the blocking mechanism towards the inside of the valve body, causing the blocking mechanism to initially seal the valve body and prevent large aggregate particles from falling into the concrete, thus preventing them from jamming the sealing mechanism. Through the coordinated arrangement of a second guide rod, the sealing mechanism, and a driving mechanism, the driving mechanism moves the second guide rod, thereby completely sealing the interior of the valve body. The coordinated arrangement of the blocking mechanism and the sealing mechanism reduces the possibility of aggregate jamming when sealing the valve body, improving the sealing performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model during sealing; Figure 2 This is a schematic diagram of the structure of this utility model when connected; Figure 3 This is a front cross-sectional view of the structure of this utility model during sealing; Figure 4 This is a front cross-sectional view of the structure of this utility model when it is connected; Figure 5This is a front cross-sectional view of the first drive gear of this utility model; Figure 6 This is a front cross-sectional view of the second drive gear of this utility model; Figure 7 This is a side sectional view of the protective cover of this utility model.

[0014] In the diagram: 1. Valve body; 2. Flange; 3. Protective cover; 4. Guide block; 5. First guide rod; 6. Second guide rod; 7. Sealing plate; 8. Connecting port; 9. Discharge channel; 10. Expansion plate; 11. Replacement frame; 12. Screen; 13. Limiting block; 14. First drive gear; 15. Rack; 16. Second drive gear; 17. Worm gear; 18. Turntable; 19. Elastic block; 20. Sealing gasket. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] Please see Figures 1 to 7 This utility model provides a technical solution: a stop valve device for a concrete pump pipe, including a valve body 1 and flanges 2 located at the upper and lower ends of the valve body 1. A protective cover 3 is fixedly connected to one side of the valve body 1. Guide blocks 4 are respectively provided at the top and bottom of the protective cover 3. There are two guide blocks 4. A material discharge channel 9 is opened inside the valve body 1.

[0017] The two guide blocks 4 are respectively guided and slidably connected to a first guide rod 5 and a second guide rod 6. The first guide rod 5 is located above the second guide rod 6. A blocking mechanism is provided on one side of the first guide rod 5. An expansion part is provided at one end of the first guide rod 5 to prevent the first guide rod 5 from coming out of the guide block 4. A sealing mechanism is provided on one side of the second guide rod 6. The sealing mechanism includes a sealing plate 7 and a connecting port 8. The sealing plate 7 is fixedly connected to the inner wall of the second guide rod 6 and passes through the valve body 1. The connecting port 8 is opened on one side of the surface of the sealing plate 7 to connect the two ends of the feeding channel 9.

[0018] The protective cover 3 has a drive mechanism inside to drive the second guide rod 6 to move.

[0019] The valve body 1 is connected to the front and rear pipelines via flanges 2 at both ends. The first guide rod 5 and the second guide rod 6 are both guided and connected to the guide block 4. They can move independently. When the first guide rod 5 is pushed, it slides in the upper guide block 4. While sliding, it drives the blocking mechanism to move in the valve body 1. One end of the first guide rod 5 expands, and the size of the expanded part is larger than the size inside the guide block 4 to prevent the first guide rod 5 from falling off the valve body 1. The second guide rod 6 is driven to move by the drive mechanism, thereby driving the sealing mechanism to move to achieve sealing and opening of the valve body 1.

[0020] In this embodiment, as a preferred solution, the blocking mechanism includes an extension plate 10, a replacement frame 11 is detachably connected to the upper surface of the extension plate 10, a screen 12 is fixedly connected to the bottom of the replacement frame 11 for separating stones, and a limiting block 13 is fixedly connected to the bottom of the inner wall of the extension plate 10, the limiting block 13 abuts against the bottom of the replacement frame 11 for supporting the replacement frame 11.

[0021] When the second guide rod 6 moves, it drives the inner fixed sealing plate 7 to move. When the sealing plate 7 is connected to the discharge channel 9, it prevents the concrete in the discharge channel 9 from falling and closes the discharge channel 9. When the connecting port 8 on one side of the sealing plate 7 is aligned with the discharge channel 9, the concrete can pass through the connecting port 8 for discharge. When the expansion plate 10 is pushed into the valve body 1, the screen 12 at the bottom of the replacement frame 11 can block the concrete and intercept the aggregate larger than the gap between the sealing plate 7 and the valve body 1 to prevent large aggregate particles from getting stuck between the sealing plate 7 and the valve body 1 and causing the seal to fail. The replacement frame 11 is detachably set on the expansion plate 10. After the screen 12 in the replacement frame 11 fails, the screen 12 can be replaced to maintain the blocking efficiency.

[0022] In this embodiment, as a preferred option, the driving mechanism includes a first driving gear 14 and a rack 15. The first driving gear 14 is rotatably connected to the inside of the protective cover 3 via a rotating shaft. The rack 15 is located on the top of the second guide rod 6 and meshes with the first driving gear 14. A second driving gear 16 is fixedly connected to one side of the first driving gear 14, and a worm gear 17 meshes with one side of the second driving gear 16. A turntable 18 is rotatably connected to the front of the protective cover 3. One end of the turntable 18 meshes with the bottom of the worm gear 17 via a bevel gear, so that the turntable 18 drives the worm gear 17 to rotate.

[0023] When the turntable 18 is rotated, the turntable 18 drives the bevel gear connected to one end to rotate, which in turn drives the worm gear 17 to rotate. The worm gear 17 further drives the second drive gear 16 to rotate, and the second drive gear 16 drives the first drive gear 14 to rotate. Finally, the first drive gear 14 meshes with the rack 15. The rotation of the first drive gear 14 causes the rack 15 to move laterally, thereby driving the sealing plate 7 to move on the valve body 1. By setting the worm gear 17, the sealing plate 7 can be prevented from moving on its own. The sealing plate 7 can only be driven to move by one side of the turntable 18, thus improving stability.

[0024] In this embodiment, as a preferred option, an elastic block 19 is fixedly connected to one end of the expansion plate 10 near the feeding channel 9, and the elastic block 19 is made of rubber.

[0025] The elastic block 19 can deform itself. When the extension plate 10 moves, if one end abuts against the aggregate, the elastic block 19 can deform itself to avoid the aggregate and ensure that the screen 12 installed on the extension plate 10 can be at the bottom of the feeding channel 9.

[0026] In this embodiment, as a preferred option, a sealing gasket 20 is fixedly connected to the top of the connecting port 8 to seal the gap between the connecting port 8 and the feeding channel 9.

[0027] In this invention, the working steps of the device are as follows: 1. When sealing, first push the first guide rod 5 so that the first guide rod 5 inserts the extension plate 10 into the feeding channel 9, and the screen 12 blocks the large particles of aggregate. 2. After the first guide rod 5 moves into place, the turntable 18 is rotated to drive the second guide rod 6 to move, so that the sealing plate 7 completely seals the inside of the valve body 1 and prevents concrete from flowing through. 3. When it is necessary to open, slide the first guide rod 5 to one side to pull the expansion plate 10 out of the valve body 1, and then rotate the turntable 18 to move the sealing plate 7 so that the connecting port 8 on one side of the sealing plate 7 is aligned with the feeding channel 9 to feed the material.

[0028] The specific embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A shut-off valve device for a concrete pump pipe, characterized in that: Includes a valve body (1) and flanges (2) located at the upper and lower ends of the valve body (1). A protective cover (3) is fixedly connected to one side of the valve body (1). Guide blocks (4) are provided at the top and bottom of the protective cover (3). There are two guide blocks (4). A material discharge channel (9) is opened inside the valve body (1). The two guide blocks (4) are respectively guided and slidably connected to a first guide rod (5) and a second guide rod (6). The first guide rod (5) is located above the second guide rod (6). A blocking mechanism is provided on one side of the first guide rod (5). An expansion part is provided at one end of the first guide rod (5) to prevent the first guide rod (5) from coming out of the guide block (4). A sealing mechanism is provided on one side of the second guide rod (6). The sealing mechanism includes a sealing plate (7) and a connecting port (8). The sealing plate (7) is fixedly connected to the inner wall of the second guide rod (6) and passes through the valve body (1). The connecting port (8) is opened on one side of the surface of the sealing plate (7) to connect the two ends of the feeding channel (9). The protective cover (3) is equipped with a drive mechanism inside to drive the second guide rod (6) to move.

2. The shut-off valve device for a concrete pump pipe according to claim 1, characterized in that: The blocking mechanism includes an extension plate (10), on the upper surface of which a replacement frame (11) is detachably connected, and at the bottom of the replacement frame (11) a screen (12) is fixedly connected to separate stones.

3. The shut-off valve device for a concrete pump pipe according to claim 2, characterized in that: A limiting block (13) is fixedly connected to the bottom of the inner wall of the expansion plate (10), and the limiting block (13) abuts against the bottom of the replacement frame (11) to support the replacement frame (11).

4. A shut-off valve device for a concrete pump pipe according to any one of claims 1-3, characterized in that: The drive mechanism includes a first drive gear (14) and a rack (15). The first drive gear (14) is rotatably connected to the inside of the protective cover (3) via a rotating shaft. The rack (15) is located on the top of the second guide rod (6) and meshes with the first drive gear (14).

5. A shut-off valve device for a concrete pump pipe according to claim 4, characterized in that: A second drive gear (16) is fixedly connected to one side of the first drive gear (14), and a worm gear (17) is meshed on one side of the second drive gear (16). A turntable (18) is rotatably connected to the front of the protective cover (3). One end of the turntable (18) and the bottom of the worm gear (17) are meshed by a bevel gear to drive the worm gear (17) to rotate.

6. A shut-off valve device for a concrete pump pipe according to claim 2 or 3, characterized in that: An elastic block (19) is fixedly connected to one end of the expansion plate (10) near the feeding channel (9), and the elastic block (19) is made of rubber.

7. A shut-off valve device for a concrete pump pipe according to any one of claims 1-3, characterized in that: A sealing gasket (20) is fixedly connected to the top of the connecting port (8) to seal the gap between the connecting port (8) and the feeding channel (9).

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