Negative pressure material conveying pipe anti-blocking air supplementing device

Abstract

A negative pressure conveying pipe anti-clogging and air replenishment device relates to the field of material conveying technology. This invention solves the problems of high cost, poor safety, and complex procedures in existing negative pressure conveying pipe anti-clogging and air replenishment methods. The negative pressure conveying pipe of this invention has a welding seat and a fixed seat sequentially arranged at its top. A venting sealing plate is installed at the upper part of the inner hole of the fixed seat, and a first sealing gasket is installed below the venting sealing plate. A piston rod is installed at the lower part of the inner hole of the fixed seat, with its top end passing through the first sealing gasket and the venting sealing plate. The first sealing gasket is connected to the piston portion. A return spring is located above the venting sealing plate. A stop assembly is installed at the upper part of the piston rod section. An adjusting shell communicating with the outside is installed above the fixed seat, and a pressure gauge communicating with the inner cavity of the adjusting shell is installed at its top. This invention automatically replenishes air to the negative pressure conveying pipe in the event of pipe blockage without manual intervention, and automatically closes after the material pipeline is opened to maintain negative pressure in the conveying pipeline.

Description

Technical Field

[0001] This utility model relates to the field of material conveying technology, specifically to a negative pressure conveying pipe anti-clogging and air replenishment device. Background Technology

[0002] Existing air replenishment devices on negative pressure conveying pipelines all involve adding pressure sensors. When material becomes blocked, the pressure sensor detects a signal and then opens the air replenishment valve to clear the blockage. This method is not only costly, but also raises safety concerns regarding the feedback signals from pressure sensors and valves in explosion-proof environments. Furthermore, it is complex in terms of programming and presents challenges for later maintenance. Therefore, there is an urgent need to provide a solution to address the aforementioned problems of traditional negative pressure conveying pipelines. Utility Model Content

[0003] The purpose of this invention is to solve the problems of high cost, poor safety and complicated procedures in the existing negative pressure conveying pipe anti-blockage and air replenishment methods, and to provide a negative pressure conveying pipe anti-blockage and air replenishment device.

[0004] The technical solution of this utility model is:

[0005] A negative pressure conveying pipe anti-clogging and air replenishment device includes a welding seat 1, a fixed seat 2, a first sealing gasket 3, a venting sealing disc 4, a return spring 5, a piston rod 6, an adjusting shell 9, a pressure gauge 10, a stop assembly, and a locking assembly. The welding seat 1 is vertically arranged at the top of the negative pressure conveying pipe and communicates with the inner cavity of the pipe body. The fixed seat 2 is coaxially arranged at the top of the welding seat 1. A venting sealing disc 4 is coaxially arranged at the upper part of the inner hole of the fixed seat 2. The first sealing gasket 3 is located below the venting sealing disc 4. A valve is located at the lower part of the inner hole of the fixed seat 2. A piston rod 6 is arranged coaxially. The top of the rod portion of the piston rod 6 passes coaxially through the first sealing gasket 3 and the vent sealing plate 4 from top to bottom. The first sealing gasket 3 is in contact with the upper surface of the piston portion of the piston rod 6. The return spring 5 is located above the vent sealing plate 4 and is sleeved on the upper part of the rod segment of the piston rod 6. A stop assembly is provided on the upper part of the rod segment of the piston rod 6. An adjusting shell 9 is arranged coaxially above the fixed seat 2. The adjusting shell 9 is detachably fixed to the fixed seat 2 by a locking assembly. A pressure gauge 10 communicating with the inner cavity of the adjusting shell is provided at the top of the adjusting shell 9.

[0006] Furthermore, the anti-clogging gas replenishment device also includes a filter 11, which is coaxially arranged above the fixed base 2. The filter 11 is in communication with the outside world and is detachably fixed to the fixed base 2 by a locking assembly.

[0007] Furthermore, the anti-blocking gas supply device also includes a second sealing gasket 13. Both the welding seat 1 and the fixing seat 2 are circular sleeve structures. The inner hole of the welding seat 1 is a stepped hole, and the upper section of the stepped hole is a threaded hole. The lower side of the fixing seat 2 is provided with external threads, and the lower part of the fixing seat 2 is threadedly connected to the upper part of the welding seat 1. The second sealing gasket 13 is an annular plate structure, and the second sealing gasket 13 is embedded in the stepped surface of the welding seat 1.

[0008] Furthermore, the stop assembly includes a stop nut 8, and the upper side of the rod portion of the piston rod 6 has an external thread, with the stop nut 8 being threadedly connected to the upper part of the rod portion of the piston rod 6.

[0009] Furthermore, the stop assembly also includes a washer 7, which is provided between the anti-reverse nut 8 and the return spring 5, and the washer 7 is sleeved on the rod part of the piston rod 6.

[0010] Furthermore, several ventilation holes are opened on the ventilation sealing plate 4.

[0011] Furthermore, the venting sealing disc 4 includes a sleeve portion and a disc body portion. The sleeve portion is located at the center of the disc body portion. The sleeve portion and the disc body portion are an integral structure. The sleeve portion is slidably connected to the rod portion of the piston rod 6. Several vent holes are opened on the disc body portion, which are vertically penetrating the upper and lower surfaces of the disc body. The several vent holes are evenly distributed along the circumferential direction.

[0012] Furthermore, the locking assembly includes a clamp 12, the upper end of the fixing seat 2 is provided with an upper circular outer edge, the lower end of the adjusting shell 9 and the filter 11 is provided with a lower circular outer edge, and the upper circular outer edge of the fixing seat 2 is detachably fixedly connected to the lower circular outer edge of the adjusting shell 9 and / or the filter 11 through the clamp 12.

[0013] Furthermore, the locking assembly also includes a silicone pad, which is an annular plate structure. The silicone pad is coaxially arranged between the upper circular outer edge of the fixed base 2 and the lower circular outer edge of the adjusting shell 9 and / or the filter 11, and the lower surface of the silicone pad is in contact with the upper surface of the vent sealing disc 4.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] 1. The negative pressure conveying pipe anti-blockage and air replenishment device of this utility model can automatically replenish air to the negative pressure conveying pipe in the event of pipe blockage without manual intervention, and can automatically close after the material pipeline is opened to ensure the negative pressure in the conveying pipeline.

[0016] 2. The negative pressure conveying pipe anti-blockage air replenishment device of this utility model can also make a small amount of air replenishment to prevent material blockage at point A when it is about to be blocked. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of a negative pressure conveying pipe anti-clogging and air replenishment device under critical negative pressure adjustment state according to this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a negative pressure conveying pipe anti-clogging and air replenishment device after adjusting the critical negative pressure according to this utility model;

[0019] Figure 3 This is a schematic diagram of the air replenishment state of a negative pressure conveying pipe anti-blockage and air replenishment device of this utility model when the material is blocked at point A.

[0020] In the diagram: 1. Welding seat; 2. Fixed seat; 3. First sealing gasket; 4. Vent sealing disc; 5. Return spring; 6. Piston rod; 7. Gasket; 8. Anti-reverse nut; 9. Adjusting shell; 10. Pressure gauge; 11. Filter; 12. Clamp; 13. Second sealing gasket. Detailed Implementation

[0021] Specific implementation method one: Combining Figures 1 to 3 This embodiment describes a negative pressure conveying pipe anti-clogging and air-replenishing device. The device includes a welding seat 1, a fixed seat 2, a first sealing gasket 3, a venting sealing disc 4, a return spring 5, a piston rod 6, an adjusting shell 9, a pressure gauge 10, a stop assembly, and a locking assembly. The welding seat 1 is vertically arranged at the top of the negative pressure conveying pipe and communicates with the inner cavity of the pipe body. The fixed seat 2 is coaxially arranged at the top of the welding seat 1. A venting sealing disc 4 is coaxially arranged at the upper part of the inner hole of the fixed seat 2. The first sealing gasket 3 is located below the venting sealing disc 4. A piston rod 6 is coaxially arranged at the lower part of the inner hole. The top of the rod part of the piston rod 6 passes coaxially through the first sealing gasket 3 and the vent sealing plate 4 from top to bottom. The first sealing gasket 3 contacts the upper surface of the piston part of the piston rod 6. The return spring 5 is located above the vent sealing plate 4 and is sleeved on the upper part of the rod section of the piston rod 6. A stop assembly is provided at the upper part of the rod section of the piston rod 6. An adjusting shell 9 is coaxially arranged above the fixed seat 2. The adjusting shell 9 is detachably fixed to the fixed seat 2 by a locking assembly. A pressure gauge 10 communicating with the inner cavity of the adjusting shell is provided at the top of the adjusting shell 9.

[0022] Specific Implementation Method Two: Combining Figures 1 to 3 This embodiment further includes a filter 11, which is coaxially arranged above the fixed base 2. The filter 11 is in communication with the outside environment and is detachably fixed to the fixed base 2 via a locking assembly. With this configuration, after adjusting the critical negative pressure, the filter 11 is connected to the fixed base 2. Other components and connections are the same as in specific embodiment one.

[0023] Specific implementation method three: Combining Figures 1 to 3This embodiment further includes a second sealing gasket 13. Both the welding seat 1 and the fixing seat 2 are circular sleeve structures. The inner hole of the welding seat 1 is a stepped hole, with the upper section of the stepped hole being a threaded hole. The lower side of the fixing seat 2 has external threads, and the lower part of the fixing seat 2 is threadedly connected to the upper part of the welding seat 1. The second sealing gasket 13 is an annular plate structure, embedded in the stepped surface of the welding seat 1. With this configuration, the connection between the fixing seat 2 and the welding seat 1 is sealed by the second sealing gasket 13. Other components and connections are the same as in specific embodiments one or two.

[0024] Specific implementation method four: Combination Figures 1 to 3 This embodiment describes a stop assembly including a stop nut 8. The upper side of the piston rod 6 has an external thread, and the stop nut 8 is threaded to the upper part of the piston rod 6. With this configuration, the critical negative pressure for the air supply device can be adjusted by adjusting the stop nut 8, allowing for adjustments based on material characteristics and conveying pressure requirements. Other components and connections are the same as in specific embodiments one, two, or three.

[0025] Specific Implementation Method Five: Combining Figures 1 to 3 This embodiment further includes a washer 7. The washer 7 is positioned between the anti-reverse nut 8 and the return spring 5, and is sleeved on the rod portion of the piston rod 6. This arrangement allows the washer 7 to axially limit the return spring 5. Other components and connections are the same as in specific embodiments one, two, three, or four.

[0026] Specific Implementation Method Six: Combination Figures 1 to 3 This embodiment describes a system where the venting sealing disc 4 has several vent holes. This arrangement allows the interior of the adjusting housing 9 to connect with the negative pressure delivery pipeline. Other components and connections are the same as in specific embodiments one, two, three, four, or five.

[0027] Specific implementation method seven: Combining Figures 1 to 3 This embodiment describes a ventilated sealing disc 4 comprising a sleeve portion and a disc body portion. The sleeve portion is located at the center of the disc body portion, and the sleeve portion and disc body portion are an integral structure. The sleeve portion is slidably connected to the rod portion of the piston rod 6. Several vent holes are vertically penetrating the upper and lower surfaces of the disc body portion, and these vent holes are evenly distributed along the circumference. This configuration, with the ventilated sealing disc 4 slidably connected to the rod portion of the piston rod 6 via the sleeve portion, ensures stable movement of the piston rod 6. Other components and connections are the same as in specific embodiments one, two, three, four, five, or six.

[0028] Specific implementation method eight: Combination Figures 1 to 3This embodiment describes a locking assembly including a clamp 12. The upper end of the fixed base 2 has an upper circular outer edge, and the lower ends of the adjusting shell 9 and the filter 11 have lower circular outer edges. The upper circular outer edge of the fixed base 2 is detachably fixedly connected to the lower circular outer edge of the adjusting shell 9 and / or the filter 11 via the clamp 12. This configuration allows for easy disassembly and installation between the adjusting shell 9 and the fixed base 2, and between the filter 11 and the fixed base 2, by connecting both the adjusting shell 9 and the fixed base 2, and between the filter 11 and the fixed base 2, via the clamp 12. When adjusting the critical negative pressure, the adjusting shell 9 is connected to the fixed base 2 via the clamp 12; after adjusting the critical negative pressure, the filter 11 is connected to the fixed base 2 via the clamp 12. Other components and connections are the same as in specific embodiments one, two, three, four, five, six, or seven.

[0029] In this embodiment, the clamp 12 is a commercially available product. As long as it can achieve a detachable connection between the upper and lower circular outer edges, the specific structure is not limited and will not be described in detail here.

[0030] Specific Implementation Method Nine: Combining Figures 1 to 3 In this embodiment, the locking assembly further includes a silicone pad. The silicone pad has an annular plate structure and is coaxially arranged between the upper circular outer edge of the fixed base 2 and the lower circular outer edge of the adjusting shell 9 and / or the filter 11. The lower surface of the silicone pad is in contact with the upper surface of the vent sealing disc 4. This arrangement, with the silicone pad between the adjusting shell 9 and the fixed base 2, and between the filter 11 and the fixed base 2, achieves both a sealed connection and axial positioning of the vent sealing disc 4. Other components and connections are the same as in specific embodiments one, two, three, four, five, six, seven, or eight.

[0031] Working principle

[0032] Combination Figures 1 to 3 This invention describes the working principle of a negative pressure conveying pipe anti-clogging and air replenishment device:

[0033] Before use, the fixed base 2 needs to be connected to the negative pressure delivery pipeline to generate a high negative pressure at the inlet of the fixed base 2. Since the adjusting shell 9 is connected to the outside, the adjusting shell 9 is in a normal pressure state. Under the action of the negative pressure, the return spring 5 is compressed, causing the piston rod 6 to move downward, creating a gap between the first sealing gasket 3 and the vent sealing plate 4. At this time, the inside of the adjusting shell 9 is connected to the negative pressure delivery pipeline. When the pressure gauge 10 has a reading, it means that the air replenishment device is activated at the critical negative pressure. After adjusting the critical negative pressure, the adjusting shell 9 can be replaced with the filter 11 for normal use.

[0034] When there is no blockage in the negative pressure conveying pipeline, the material is conveyed from A to B as follows: Figure 1As shown, the welding seat 1 is kept in a low negative pressure state. Under the action of the return spring 5, the piston rod 6 pushes the gasket 7 to drive the anti-reverse nut 8 and the piston rod 6 to move upward, so that the first sealing gasket 3 is in close contact with the ventilated sealing plate 4 to seal. At this time, the air replenishment device does not work, which can ensure that the material is conveyed normally under the corresponding negative pressure state.

[0035] When there is a blockage in the negative pressure conveying pipeline, such as Figure 2 As shown, when material is blocked at point A, the negative pressure at point B will rise rapidly due to the blockage, further increasing the negative pressure in the cavities of welding seat 1 and fixed seat 2. Since filter 11 is connected to the outside, the area above the venting sealing plate 4 is at normal pressure. Under the action of pressure difference, piston rod 6 will pull return spring 5 down, causing the first sealing gasket 3 to detach from the venting sealing plate 4. The small hole on the venting sealing plate 4 will connect point B to the outside, and gas will flow rapidly into the negative pressure conveying pipeline through the small hole on the venting sealing plate 4. Because the small hole on the venting sealing plate 4 is relatively small, the air velocity at the connection point will be very fast. Under the action of air jet, the accumulated material at point A will be cleared, breaking up the accumulated material at point A, thus making the pipeline unobstructed. When the pipeline is opened, the air replenishment device will return to normal under the action of return spring 5. Figure 1 In the state shown.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A negative pressure conveying pipe anti-clogging and air replenishment device, characterized in that: The anti-blocking gas supply device includes a welding seat (1), a fixed seat (2), a first sealing gasket (3), a venting sealing disc (4), a return spring (5), a piston rod (6), an adjusting shell (9), a pressure gauge (10), a stop assembly, and a locking assembly. A welding seat (1) is vertically arranged and connected to the inner cavity of the negative pressure conveying pipeline. A fixed seat (2) is coaxially arranged at the top of the welding seat (1). A venting sealing disc (4) is coaxially arranged at the upper part of the inner hole of the fixed seat (2). A first sealing gasket (3) is arranged below the venting sealing disc (4). A piston is coaxially arranged at the lower part of the inner hole of the fixed seat (2). The top of the rod (6) of the piston rod (6) passes coaxially through the first sealing gasket (3) and the vent sealing plate (4) from top to bottom. The first sealing gasket (3) contacts the upper surface of the piston part of the piston rod (6). The return spring (5) is located above the vent sealing plate (4) and sleeved on the upper part of the rod section of the piston rod (6). A stop assembly is provided on the upper part of the rod section of the piston rod (6). An adjustment shell (9) is coaxially arranged above the fixed seat (2). The adjustment shell (9) is detachably fixed to the fixed seat (2) through a locking assembly. A pressure gauge (10) communicating with the inner cavity of the adjustment shell is provided at the top of the adjustment shell (9).

2. The anti-clogging and air-replenishing device for a negative pressure conveying pipe according to claim 1, characterized in that: The anti-blocking gas replenishment device also includes a filter (11), which is coaxially arranged above the fixed base (2). The filter (11) is connected to the outside world and is detachably fixed to the fixed base (2) through a locking assembly.

3. A negative pressure conveying pipe anti-clogging and air replenishment device according to claim 1 or 2, characterized in that: The anti-blocking gas supply device also includes a second sealing gasket (13). The welding seat (1) and the fixed seat (2) are both circular sleeve structures. The inner hole of the welding seat (1) is a stepped hole. The upper part of the stepped hole is a threaded hole. The lower side of the fixed seat (2) is threaded. The lower part of the fixed seat (2) is threadedly connected to the upper part of the welding seat (1). The second sealing gasket (13) is an annular plate structure. The second sealing gasket (13) is embedded in the stepped surface of the welding seat (1).

4. The anti-clogging and air-replenishing device for a negative pressure conveying pipe according to claim 3, characterized in that: The stop assembly includes a stop nut (8), and the upper side of the rod part of the piston rod (6) is threaded with an external thread, and the stop nut (8) is threaded to the upper part of the rod part of the piston rod (6).

5. A negative pressure conveying pipe anti-clogging and air replenishment device according to claim 1 or 4, characterized in that: The stop assembly also includes a washer (7), which is provided between the anti-reverse nut (8) and the return spring (5), and the washer (7) is sleeved on the rod part of the piston rod (6).

6. The anti-clogging and air-replenishing device for a negative pressure conveying pipe according to claim 5, characterized in that: Several ventilation holes are opened on the ventilation sealing plate (4).

7. The anti-clogging and air-replenishing device for a negative pressure conveying pipe according to claim 6, characterized in that: The ventilation sealing disc (4) includes a sleeve part and a disc body part. The sleeve part is located at the center of the disc body part. The sleeve part and the disc body part are an integral structure. The sleeve part is slidably connected to the rod part of the piston rod (6). Several ventilation holes are opened on the disc body part, which are vertically penetrating the upper and lower surfaces of the disc body. The several ventilation holes are evenly distributed along the circumferential direction.

8. The anti-clogging and air-replenishing device for a negative pressure conveying pipe according to claim 7, characterized in that: The locking assembly includes a clamp (12), the upper end of the fixing seat (2) is provided with an upper circular outer edge, the lower end of the adjusting shell (9) and the filter (11) is provided with a lower circular outer edge, and the upper circular outer edge of the fixing seat (2) is detachably fixedly connected to the lower circular outer edge of the adjusting shell (9) and / or the filter (11) through the clamp (12).

9. The anti-clogging and air-replenishing device for a negative pressure conveying pipe according to claim 8, characterized in that: The locking assembly also includes a silicone pad, which is an annular plate structure. The silicone pad is coaxially arranged between the upper circular outer edge of the fixed seat (2) and the lower circular outer edge of the adjusting shell (9) and / or the filter (11), and the lower surface of the silicone pad is in contact with the upper surface of the vent sealing disc (4).

Images