Expansion type cut-off door for pipe orifice

Abstract

The utility model discloses an expansion type cut-off door for a pipe orifice, which relates to the technical field of gates, and comprises a base, a brake pad and a driving device, the base is provided with an overflowing channel, a connecting structure and a sealing structure are respectively arranged on a group of opposite surfaces of the base, the connecting structure surrounds the overflowing channel, the connecting structure is used for connecting the pipe orifice, and the sealing structure is used for sealing the sealing structure. The sealing structure surrounds the overflowing channel, and a first cutting edge is arranged on the side, located on the sealing structure, of the base. The brake pad is arranged on the base in a pivoted mode, the brake pad can rotate to a first position and a second position, at the first position, the brake pad closes the flow passing channel, the brake pad and the sealing structure jointly form sealing, at the second position, the brake pad opens the flow passing channel, and the rotating path of the brake pad is tangent to the first cutting edge; the driving device is in transmission connection with the brake pad and used for driving the brake pad to rotate to the first position or the second position. According to the expansion type cut-off door for the pipe orifice, the gate body is simple in structure, good in sealing performance and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of gate technology, and in particular to an expansion-type shut-off gate for pipe openings. Background Technology

[0002] In a water flow control system, gates are used to open and close pipe openings to control the flow rate of water within the pipe.

[0003] In existing control systems, gate valves are still used to control pipe openings. For example, in some gate structures, the gate uses a gate valve structure, with the gate valve parallel to the cross-section of the pipe opening. The flow path of the pipe opening is cut off by the gate valve moving along a guide groove. In the gate valve structure, the gate valve moves along the guide groove, and a sealing structure needs to be installed in the guide groove. Therefore, the friction generated when the gate valve moves is large, which also causes wear to the sealing structure, resulting in a short service life. Especially when the water level is higher than the gate valve, the water pressure acts on the gate valve surface, further increasing the pressure between the gate valve and the guide groove, which further increases the friction force experienced by the gate valve during movement.

[0004] Gate-type gates are typically installed vertically, meaning the gate moves vertically to open and close the pipe opening. This gate structure requires a relatively high depth for the diversion shaft or other manhole; the manhole needs sufficient depth to ensure the gate can move vertically to fully open the pipe opening. Therefore, gate-type gates have high requirements for installation space and significant limitations.

[0005] Another type of gate or valve structure is the hydraulic flap gate. Hydraulic flap gates are primarily used to prevent river tides from flowing back into drainage pipes. When the river tide level is higher than the outlet pipe and the pressure is greater than the pressure inside the pipe, the flap gate panel automatically closes, thus preventing water from flowing back into the pipe and ensuring the normal operation and safety of the pipeline system. The disadvantages of hydraulic flap gates are their low pressure resistance, poor reverse water-stopping ability, and inability to cut off debris at the pipe opening. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an expansion-type shut-off gate for pipe openings, which has a simple gate structure, good sealing performance, and long service life.

[0007] An expansion-type cutting gate for a pipe opening according to an embodiment of the present utility model includes: a base, the base having a flow channel, a connecting structure and a sealing structure respectively provided on a set of opposite surfaces of the base, the connecting structure surrounding the flow channel and used to connect the pipe opening, the sealing structure surrounding the flow channel, and a first cutting edge provided on one side of the base located at the sealing structure;

[0008] A brake plate is pivotally mounted on the base. The brake plate can rotate to a first position and a second position. In the first position, the brake plate closes the flow channel, and the brake plate and the sealing structure together form a seal. In the second position, the brake plate opens the flow channel, and the rotation path of the brake plate is tangent to the first cutting edge.

[0009] A driving device is connected to the brake pad and is used to drive the brake pad to rotate to the first position or the second position.

[0010] The expansion-type shut-off gate for pipe openings according to embodiments of this utility model has at least the following beneficial effects: the base is easily fixed and installed at the pipe opening position through the connecting structure; the sealing structure is used to cooperate with the gate plate to form a seal, enabling the pipe opening to be closed; the driving device is used to drive the gate plate to rotate and switch between a first position and a second position, that is, to close or open the pipe opening. The gate plate opens and closes by rotation, reducing friction between the gate plate and the sealing structure, thus improving the situation where the sealing structure is damaged by friction. The base is provided with a first cutting edge; when the gate plate rotates towards the first position to close the flow channel, the gate plate and the first cutting edge can cut off large debris stuck in the flow channel, reducing the risk of debris blocking the sealing structure and affecting the sealing effect. The entire gate body has a simple structure, long service life, and good sealing performance.

[0011] According to some embodiments of the present invention, the sealing structure includes a sealing groove and a sealing ring. The sealing groove is formed around the flow channel, and the sealing ring is installed in the sealing groove. When the brake plate is in the first position, the brake plate abuts against the sealing ring.

[0012] According to some embodiments of the present invention, the sealing ring has a filling cavity inside, the sealing ring has a filling nozzle, the filling nozzle communicates with the filling cavity, and the side wall of the sealing groove has a clearance hole, the filling nozzle passes through the clearance hole and is placed outside the sealing groove.

[0013] According to some embodiments of this utility model, the side of the sealing groove away from the flow channel is the outer side, and the side of the sealing groove close to the flow channel is the inner side. In cross-section, the distance between the top surface of the outer wall of the sealing groove and the surface of the base is greater than the distance between the top surface of the inner wall of the sealing groove and the surface of the base. The edge of the gate plate is chamfered, and the chamfer of the gate plate fits the sealing groove.

[0014] According to some embodiments of the present invention, the first cutting edge is disposed on the side wall of the sealing groove away from the flow channel.

[0015] According to some embodiments of the present invention, a second cutting edge is provided on the outer edge of the brake plate, and the second cutting edge can form a shearing structure with the first cutting edge.

[0016] According to some embodiments of the present invention, the base is provided with two support parts, which are symmetrically distributed about the central axis of the flow channel. Each support part is fitted with a rotating shaft, which is connected to a transmission part. The transmission part is connected to the brake plate, and the drive device is connected to the transmission part at any point.

[0017] According to some embodiments of the present invention, the driving device is a linear driving mechanism, one end of which is hinged to the base, and the other end of which is hinged to the transmission part.

[0018] According to some embodiments of the present invention, the driving device includes a cylinder seat and a driving cylinder. The cylinder seat is fixed to the base, and the driving cylinder is hinged to the cylinder seat. The driving cylinder has a piston rod, and the piston rod is hinged to the transmission part.

[0019] According to some embodiments of the present invention, two cylinder seats and two drive cylinders are provided. The two drive cylinders are symmetrically distributed about the axis of the flow channel, and each drive cylinder is hinged to a transmission part.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a first-view structural schematic diagram of the expansion-type cutting gate used for pipe openings according to an embodiment of the present invention;

[0023] Figure 2 This is a second-view structural schematic diagram of the expansion-type cutting gate used for pipe openings according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of an expansion-type cutting gate for a pipe opening according to an embodiment of the present invention;

[0025] Figure 4 This is a partially enlarged cross-sectional view of an expansion-type cutting gate used for pipe openings according to an embodiment of this utility model.

[0026] Icon labels:

[0027] Base 100, flow channel 110, connecting structure 120, sealing structure 130, sealing groove 131, sealing ring 132, support part 140, brake plate 200, transmission part 210, drive device 300, cylinder seat 310, drive cylinder 320. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] The water flow control system mentioned in the background technology is more extensive; here, we will use a diversion well as a specific application scenario as an example. Of course, the expansion valve used for pipe inlets is not limited to the diversion well application scenario. Diversion wells are generally used for separating sewage and rainwater. Under normal circumstances, sewage is collected in the diversion well and discharged through the outlet to a sewage treatment facility for biological or chemical treatment. During rainy weather, rainfall increases, and the water flow in the diversion well increases accordingly. However, rainwater generally does not contain organic pollutants. If rainwater is simultaneously discharged into the sewage treatment facility, it will increase the burden on the facility. Therefore, during rainy weather, the diversion well can close the outlet leading to the sewage treatment facility, allowing rainwater to be discharged directly from other outlets, thus rationally regulating the water flow distribution, reducing the burden on the sewage treatment facility, and improving drainage efficiency.

[0033] The separation of sewage and rainwater is achieved at different times by adjusting the opening and closing of the outlets leading to the sewage treatment facility, so gates are needed to control the opening and closing of the pipes in the diversion well.

[0034] In existing diversion wells, gate valves are still used to control the pipe openings. In a gate valve structure, the gate is parallel to the cross-section of the pipe opening. The flow path of the pipe opening is cut off by the movement of the gate along a guide groove, thus closing the pipe opening. The gate is opened or closed by the movement of the gate along the guide groove. When the gate is in the closed state, a sealing structure needs to be installed in the guide groove to prevent water from overflowing from the gap between the gate and the guide groove. Therefore, when the gate moves in the guide groove, the contact between the gate and the sealing structure generates greater friction, and the movement of the gate also causes wear to the sealing structure. If the sealing structure fails, the gate can no longer block the water flow, hence the short service life of gate valves.

[0035] When the water level is higher than the gate, the water pressure acts on the surface of the gate, further increasing the pressure between the gate and the guide groove, which in turn further increases the frictional force experienced by the gate when it moves.

[0036] In addition, in applications such as diversion wells, large debris such as tree branches may remain inside the well. If these debris get stuck in the guide groove, they will affect the sealing effect between the gate and the guide groove.

[0037] Reference Figure 1 , Figure 2 and Figure 3 As shown, an expansion-type shut-off gate for pipe openings according to an embodiment of the present invention includes a base 100, a gate plate 200, and a drive device 300.

[0038] The base 100 is provided with a flow channel 110. A connecting structure 120 and a sealing structure 130 are respectively provided on a set of opposite surfaces of the base 100. The connecting structure 120 surrounds the flow channel 110 and is used to connect the pipe port. The sealing structure 130 surrounds the flow channel 110. The base 100 is provided with a first cutting edge on one side of the sealing structure 130.

[0039] The flow channel 110 is a channel through which water flows. For example, a through hole can be made in the base 100 to allow water to pass through, i.e., the base 100 is provided with a flow channel 110. For example, a circular plate-shaped base 100 can be selected, with a through hole made in the center of the plate-shaped base 100. One side of the plate of the base 100 can serve as a connecting structure 120, and the opposite plate can be provided with a sealing structure 130. In the diversion well, the connecting structure 120 of the plate-shaped base 100 can be a plane, which fits against the side wall of the diversion well, so that the flow channel 110 coincides with the pipe opening. Finally, the base 100 is fixed to the side wall of the diversion well. It should be understood that a sealing material, such as sealant or cement, can be applied between the base 100 and the side wall of the diversion well.

[0040] On the opposite side of the connecting structure 120 is a sealing structure 130, which is used to cooperate with the brake pad 200 to complete the sealing.

[0041] The brake plate 200 is pivotally mounted on the base 100. The brake plate 200 can rotate to a first position and a second position. In the first position, the brake plate 200 closes the flow passage 110 and the brake plate 200 and the sealing structure 130 together form a seal. In the second position, the brake plate 200 opens the flow passage 110 and the rotation path of the brake plate 200 is tangent to the first cutting edge.

[0042] The drive device 300 is connected to the brake plate 200 for driving the brake plate 200 to rotate to the first position or the second position.

[0043] It is important to understand that pivotability refers to a connection method in which two components can rotate relative to each other around a certain axis. In the connection structure of the brake plate 200, the brake plate 200 can rotate relative to the base 100 around the axis. The rotation of the brake plate 200 is powered by the drive device 300. In the first position, i.e., the eccentric gate of the pipe opening is closed, the brake plate 200 contacts the sealing structure 130 to form a seal, closing the flow passage 110, i.e., closing the pipe opening; after the drive device 300 rotates the brake plate 200 away from the first position, the brake plate 200 opens the flow passage 110, which can be understood as the brake plate 200 being in the second position.

[0044] The drive unit 300 can be selected from a device or equipment with rotary drive function or a linear drive mechanism. When the drive unit 300 selects a device with rotary drive function, the drive unit 300 transmits the rotary motion to the brake plate 200, and the drive unit 300 drives the brake plate 200 to rotate and switch between the first position and the second position.

[0045] It should be understood that the eccentric gate at the pipe opening of this invention is not limited to use in diversion wells, but can also be applied to other pipe openings to achieve opening and closing. As long as the pipe opening has a flat wall surface, the eccentric gate can be installed at the pipe opening.

[0046] When debris in the water gets stuck in the flow channel 110, especially when the debris is located at the sealing structure 130, it will affect the contact seal between the brake disc 200 and the sealing structure 130. When the brake disc 200 rotates toward the first position, because the rotation path of the brake disc 200 is tangent to the first cutting edge, the brake disc 200 can cut off the debris located at the sealing structure 130, ensuring that the brake disc 200 can form a good seal with the sealing structure 130.

[0047] Reference Figure 4 As shown, it can be understood that the sealing structure 130 includes a sealing groove 131 and a sealing ring 132. The sealing groove 131 is opened around the flow channel 110, and the sealing ring 132 is installed in the sealing groove 131. When the brake plate 200 is in the first position, the brake plate 200 abuts against the sealing ring 132.

[0048] The sealing ring 132 is typically made of an elastic material. When compressed by the brake pad 200, the sealing ring 132 deforms, increasing the contact area between the sealing ring 132 and the brake pad 200 and improving the sealing effect. Preferably, the cross-sectional shape of the sealing groove 131 can be arc-shaped, with an arc length greater than half the circumference. The cross-sectional shape of the sealing ring 132 can be circular. After the sealing ring 132 is pressed into the sealing groove 131, the groove wall of the sealing groove 131 can prevent the sealing ring 132 from coming out.

[0049] It is understood that the sealing ring 132 has a filling cavity inside, the sealing ring 132 has a filling nozzle, the filling nozzle communicates with the filling cavity, and the side wall of the sealing groove 131 has a clearance hole, the filling nozzle passes through the clearance hole and is placed outside the sealing groove 131.

[0050] The sealing ring 132, with its filling cavity, can be filled with gas or liquid, giving it better elastic deformation capability. For example, air can be injected into the sealing ring 132 through a filling nozzle, and the elasticity of the sealing ring 132 can be adjusted by controlling the air pressure inside. After the sealing ring 132 is fully inflated, the filling nozzle can be sealed. Preferably, the filling nozzle can be equipped with a one-way valve to provide a sealing function. If liquid is to be filled into the sealing ring 132, hydraulic oil can be selected.

[0051] It is important to understand that when the brake disc 200 rotates from the second position to the first position to close, the filling cavity of the sealing ring 132 may not be filled with liquid initially. Liquid is then filled into the filling cavity of the sealing ring 132 only after the brake disc 200 is fully in the first position, ensuring tight contact between the sealing ring 132 and the brake disc 200 to achieve a seal. This minimizes wear or damage to the sealing ring 132 during the rotation of the brake disc 200. It is also important to understand that the filling nozzle can be connected to an external control device to control the entry and exit of liquid into or from the filling cavity. For example, a directional valve and a pump can be used to drive liquid into or out of the filling cavity.

[0052] It is understood that the side of the sealing groove 131 away from the flow channel 110 is the outer side, and the side of the sealing groove 131 close to the flow channel 110 is the inner side. In the cross-section, the distance between the top surface of the outer wall of the sealing groove 131 and the surface of the base 100 is greater than the distance between the top surface of the inner wall of the sealing groove 131 and the surface of the base 100. The edge of the brake plate 200 is chamfered, and the chamfer of the brake plate 200 fits with the sealing groove 131.

[0053] With the above-described configuration, the sealing groove 131 can further fit the chamfer of the brake plate 200, improving the sealing performance between the brake plate 200 and the sealing ring 132. Meanwhile, it is understood that the first cutting edge is located on the side wall of the sealing groove 131 away from the flow channel 110.

[0054] The brake plate 200 preferentially engages with the first cutting edge to cut off debris before contacting the sealing ring 132, reducing the risk of debris scraping the sealing ring 132 and extending the service life of the sealing ring 132.

[0055] When the brake plate 200 rotates from the second position to the first position, the edge of the brake plate 200 can be tangential to the cutting edge, achieving a shearing effect. When there are small branches or other solid objects in the diversion well, they can be cut off by the shearing action of the brake plate 200 and the cutting edge, preventing small branches or other solid objects from being trapped between the brake plate 200 and the sealing structure 130, thus reducing the risk of damage to the sealing structure 130. Similarly, it also reduces the risk of small branches or other solid objects getting stuck in the flow channel 110 and causing blockage.

[0056] It is understandable that the outer edge of the brake plate 200 is provided with a second cutting edge, which can form a shearing structure with the first cutting edge.

[0057] The second cutting edge works in conjunction with the first cutting edge to improve the speed and ability of the brake plate 200 to cut debris.

[0058] It is understood that the base 100 is provided with two support parts 140, which are symmetrically distributed about the central axis of the flow channel 110. Each support part 140 is fitted with a rotating shaft, which is connected to a transmission part 210. The transmission part 210 is connected to the brake plate 200, and the drive device 300 is connected to any of the transmission parts 210.

[0059] The drive unit 300 drives the support part 140 at any point, which in turn drives the brake plate 200 to rotate. The support part 140 is provided on the base 100 to provide a mounting base for the pivotal connection of the brake plate 200.

[0060] It is understandable that the drive device 300 is a linear drive mechanism, with one end of the linear drive mechanism hinged to the base 100 and the other end of the linear drive mechanism hinged to the transmission part 210.

[0061] Specifically, it can be understood that the drive device 300 includes a cylinder seat 310 and a drive cylinder 320. The cylinder seat 310 is fixed to the base 100, and the drive cylinder 320 is hinged to the cylinder seat 310. The drive cylinder 320 has a piston rod, which is hinged to the transmission part 210.

[0062] The drive cylinder 320 controls the piston rod to move, thereby driving the transmission unit 210 to rotate around the rotating shaft and driving the brake plate 200 to rotate.

[0063] It is understood that there are two cylinder seats 310 and two drive cylinders 320. The two drive cylinders 320 are symmetrically distributed about the axis of the flow channel 110. Each drive cylinder 320 is hinged to a transmission part 210.

[0064] Two drive cylinders 320 control the piston rod to move synchronously, which can stably drive the rotation of the brake plate 200, and the brake plate 200 can be subjected to greater torque to cut off larger debris.

[0065] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An expansion-type shut-off gate for pipe openings, characterized in that, include: A base (100) is provided with a flow channel (110). A connecting structure (120) and a sealing structure (130) are respectively provided on a set of opposite surfaces of the base (100). The connecting structure (120) surrounds the flow channel (110) and is used to connect the pipe port. The sealing structure (130) surrounds the flow channel (110). The base (100) is provided with a first cutting edge on one side of the sealing structure (130). A brake plate (200) is pivotally disposed on the base (100). The brake plate (200) can rotate to a first position and a second position. In the first position, the brake plate (200) closes the flow channel (110), and the brake plate (200) and the sealing structure (130) together form a seal. In the second position, the brake plate (200) opens the flow channel (110). The rotation path of the brake plate (200) is tangent to the first cutting edge. A driving device (300) is connected to the brake plate (200) for driving the brake plate (200) to rotate to the first position or the second position.

2. The expansion-type shut-off gate for pipe openings according to claim 1, characterized in that, The sealing structure (130) includes a sealing groove (131) and a sealing ring (132). The sealing groove (131) is formed around the flow channel (110), and the sealing ring (132) is installed in the sealing groove (131). When the brake plate (200) is in the first position, the brake plate (200) abuts against the sealing ring (132).

3. The expansion-type shut-off gate for pipe openings according to claim 2, characterized in that, The sealing ring (132) has a filling cavity inside, and the sealing ring (132) has a filling nozzle that communicates with the filling cavity. The side wall of the sealing groove (131) has a clearance hole, and the filling nozzle passes through the clearance hole and is placed outside the sealing groove (131).

4. The expansion-type shut-off gate for pipe openings according to claim 2, characterized in that, The side of the sealing groove (131) away from the flow channel (110) is the outer side, and the side of the sealing groove (131) close to the flow channel (110) is the inner side. In cross-section, the distance between the top surface of the outer wall of the sealing groove (131) and the surface of the base (100) is greater than the distance between the top surface of the inner wall of the sealing groove (131) and the surface of the base (100). The edge of the brake plate (200) is chamfered, and the chamfer of the brake plate (200) fits the sealing groove (131).

5. The expansion-type shut-off gate for pipe openings according to claim 4, characterized in that, The first cutting edge is located on the side wall of the sealing groove (131) away from the flow channel (110).

6. The expansion-type shut-off gate for pipe openings according to claim 5, characterized in that, The outer edge of the brake piece (200) is provided with a second cutting edge, which can form a shearing structure with the first cutting edge.

7. The expansion-type shut-off gate for pipe openings according to claim 1, characterized in that, The base (100) is provided with two support parts (140), which are symmetrically distributed about the central axis of the flow channel (110). Each support part (140) is fitted with a rotating shaft, which is connected to a transmission part (210). The transmission part (210) is connected to the brake plate (200), and the drive device (300) is connected to the transmission part (210) at any point.

8. The expansion-type shut-off gate for pipe openings according to claim 7, characterized in that, The drive device (300) is a linear drive mechanism, one end of which is hinged to the base (100), and the other end of which is hinged to the transmission part (210).

9. The expansion-type shut-off gate for pipe openings according to claim 8, characterized in that, The drive device (300) includes a cylinder seat (310) and a drive cylinder (320). The cylinder seat (310) is fixed to the base (100). The drive cylinder (320) is hinged to the cylinder seat (310). The drive cylinder (320) has a piston rod, which is hinged to the transmission part (210).

10. The expansion-type shut-off gate for pipe openings according to claim 9, characterized in that, The system is provided with two cylinder seats (310) and two drive cylinders (320). The two drive cylinders (320) are symmetrically distributed about the axis of the flow channel (110). Each drive cylinder (320) is hinged to a transmission part (210).

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