Slide Valve

Abstract

To provide a slide valve suitable for reducing wear on a seat ring and facilitating replacement. SOLUTION: A slide valve 100 is attached to a branch pipe 11 and comprises an attachment part 20 having a communication passage 21 formed therein that communicates with the inside of the branch pipe 11, a seat ring 23 provided on the end face of an opening 22, a disc 30 that covers the opening 22, a slide part 40 that slides the disc 30 along the surface of the opening 22 to open and close the opening 22, and a toggle clamp 50 that presses the disc 30 toward the attachment part 20. When the disc 30 is pressed by the toggle clamp 50, the disc 30 is pressed against the seat ring 23 to seal the opening 22, and when the disc 30 is not pressed, the disc 30 is separated from the seat ring 23 and can slide without sliding against the seat ring 23.

Description

[Technical Field]

[0001] The present invention relates to a slide-type valve, and more particularly to a slide-type valve that is suitable for reducing wear on a seat ring and facilitating replacement. [Background technology]

[0002] BACKGROUND ART Conventionally, a technique using a ball valve as described in Non-Patent Document 1 is known for cleaning branch pipes through which a fluid flows.

[0003] Branch pipes, which are branch pipes, are provided at regular intervals in the main pipe. Ball valves are attached to the branch pipes. The ball valves are normally closed to prevent fluid from leaking from the branch pipes. When cleaning, the ball valves are opened and an air blow nozzle is inserted into the branch pipe through the ball valve to clean the inside of the branch pipe. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] “About Ball Valves,” [online], July 9, 2025, Hisaka Manufacturing Co., Ltd., [Retrieved July 9, 2025], Internet<URL:https: / / www.hisaka.co.jp / valve / techDoc / techDoc09.html> Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the ball valve described in Non-Patent Document 1, the ball is pressed against the seat ring by the pressure of the fluid to form a seal, which makes the seat ring susceptible to wear. When the seat ring can no longer function due to wear, the ball valve body must be replaced.

[0006] The present invention has been made in light of the unresolved problems of the prior art, and aims to provide a slide-type valve that is suitable for reducing wear on the seat ring and facilitating replacement. [Means for solving the problem]

[0007] [Invention 1] In order to achieve the above object, a slide valve of Invention 1 comprises: an attachment part attached to a pipeline through which a fluid flows, and having a communication passage formed therein that communicates with the pipeline; a seat ring provided on an end face of an opening of the communication passage; a disk that covers the opening; a sliding part that slides the disk along the surface of the opening to open and close the opening; and a pressing part that presses the disk toward the attachment part; when the disk is pressed by the pressing part, the disk is pressed against the seat ring to seal the opening, and when the disk is not pressed, the disk is separated from the seat ring and can slide without sliding against the seat ring.

[0008] With this configuration, the opening is closed by pressing the disk with the pressing portion at a position where the disk covers the opening. When the disk is pressed, the disk is pressed against the seat ring, sealing the opening. When the pressing portion is released and the disk is slid by the sliding portion, the opening is opened. When the disk is not pressed, the disk is released from the seat ring and can slide without sliding against the seat ring.

[0009] [Invention 2] Furthermore, the slide-type valve of Invention 2 is the slide-type valve of Invention 1, wherein the pressing portion is provided on the opposite side of the slide portion from the disc, and presses the disc toward the mounting portion via a through-hole formed in the slide portion.

[0010] With this configuration, the disc is pressed by the pressing portion from the side of the slide portion opposite the disc, via the through-hole of the slide portion.

[0011] [Invention 3] Furthermore, the slide valve of Invention 3 is the slide valve of Invention 2, wherein the pressing part has a head for pressing the disc, an arm for rotating the head, a lock handle, and a link for transmitting the driving force of the lock handle to the arm, and when the lock handle reaches a predetermined angle, the head presses the disc and the clamping force is maintained.

[0012] With this configuration, when the lock handle is operated to lock the disk, the head presses against the disk and the clamping force is maintained, so the disk remains pressed by the pressing part. In contrast, when the lock handle is operated to unlock the disk, the head moves away from the disk, so the pressure from the pressing part is released.

[0013] [Invention 4] Furthermore, the slide-type valve of Invention 4 is the slide-type valve of any one of Inventions 1 to 3, wherein the slide portion is provided with a stopper pin that protrudes toward the mounting portion, and the mounting portion is provided with a pin receiver that receives the stopper pin, and the stopper pin is engaged by the pin receiver at a position where the disc covers the opening.

[0014] With this configuration, the stopper pin is engaged with the pin receiver at a position where the disk covers the opening, thereby fixing the disk in place. [Effects of the Invention]

[0015] As described above, with the slide-type valve of Invention 1, when the disc is not pressed, the disc separates from the seat ring and can slide without sliding against the seat ring, thereby reducing wear on the seat ring compared to conventional valves. Also, because the seat ring can be replaced with the disc open, replacing the seat ring is easier than conventional valves.

[0016] Furthermore, according to the slide-type valve of Invention 2, it is only necessary to provide a pressing portion on the side of the slide portion opposite the disk, making it easy to manufacture.

[0017] Furthermore, according to the slide valve of the third aspect, the disc can be maintained in a pressed state.

[0018] Furthermore, according to the slide valve of Invention 4, it is possible to reduce the possibility of the disc sliding when the opening is closed. [Brief explanation of the drawings]

[0019] [Figure 1] 1A and 1B are diagrams showing the external configuration of a slide valve 100. FIG. [Figure 2] FIG. 2 is a vertical cross-sectional view of the slide valve 100 attached to the branch pipe 11. [Figure 3] 1 is a diagram showing the external configuration of the slide valve 100 in a state where the toggle clamp 50 is unlocked and the disk 30 is open. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment of the present invention will be described below, with reference to Figures 1 to 3 showing the embodiment. First, the configuration of this embodiment will be described.

[0021] 1A and 1B are diagrams showing the external configuration of a slide valve 100. FIG. 1A is a side view of the slide valve 100, and FIG. 1B is a front view of the slide valve 100.

[0022] FIG. 2 is a vertical cross-sectional view of the slide valve 100 attached to the branch pipe 11. As shown in FIG. 3A and 3B are diagrams showing the external configuration of the slide valve 100 when the toggle clamp 50 is unlocked and the disk 30 is open. Fig. 3A is a side view of the slide valve 100, and Fig. 3B is a front view of the slide valve 100.

[0023] As shown in Figure 2, the slide valve 100 is provided to clean the inside of a branch pipe 11 through which a fluid flows. Branch pipes 11, which are branch pipes, are provided at predetermined intervals in a main pipe 10. The slide valve 100 is attached to the branch pipe 11. The slide valve 100 is normally closed to prevent fluid from flowing out of the branch pipe 11. During cleaning, the slide valve 100 is opened, and an air blow nozzle is inserted into the branch pipe 11 through the slide valve 100 to clean the inside of the branch pipe 11.

[0024] As shown in FIGS. 1 to 3, the slide valve 100 is configured by stacking an attachment portion 20, a disc 30, a slide portion 40, and a toggle clamp 50 in the axial direction S in that order.

[0025] The mounting portion 20 is mounted by fitting onto the branch pipe 11. A communication passage 21 that communicates with the inside of the branch pipe 11 is formed in the mounting portion 20 in the axial direction S. A seat ring 23 is provided on the end face of the opening 22 along the outer periphery of the opening 22. The seat ring 23 is a ring-shaped member made of rubber or PTFE (Poly Tetra Fluoro Ethylene). The opening 22 of the communication passage 21 is covered by the inner surface of the disk 30 when the disk 30 is closed, and when the toggle clamp 50 is locked, the disk 30 is pressed against the seat ring 23 to seal the opening 22. A bearing 24 that receives the rotation shaft 42 of the slide portion 40 is provided at the upper end of the mounting portion 20. A pin receiver 25 that receives the stopper pin 44 of the slide portion 40 is provided at the lower end of the mounting portion 20.

[0026] The disk 30 is formed in a disk shape large enough to cover the opening 22, and slides along the surface of the opening 22 around its upper end as an axis to open and close the opening 22. The disk 30 has an inner surface facing the mounting portion 20 and an outer surface on the opposite side. A protrusion 31 that protrudes in the axial direction S is formed at the center of the outer surface of the disk 30.

[0027] A through-hole 41 penetrating in the axial direction S is formed in the center of the slide portion 40. The disk 30 is attached to the slide portion 40 by fitting a protrusion 31 into the through-hole 41. The slide portion 40 has an inner surface facing the disk 30 and an outer surface on the opposite side. A rotation shaft 42, whose axial direction is the axial direction S, is provided at the upper end of the slide portion 40 and protrudes toward the mounting portion 20. The rotation shaft 42 passes through a bearing hole of the bearing 24, has its tip fixed by a nut 43, and is rotatably supported by the bearing 24. A stopper pin 44 extending in the axial direction S is provided at the lower end of the slide portion 40 and protrudes toward the mounting portion 20. The stopper pin 44 is engaged with a pin receiver 25 at a position where the disk 30 completely covers the opening 22. As a result, the slide portion 40 can slide (rotate) the disk 30 counterclockwise around the rotation shaft 42 when viewed from the front, starting from the position where the disk 30 completely covers the opening 22.

[0028] The toggle clamp 50 is composed of a clamp base 51 attached to the outer surface of the slide portion 40, a head 52 for pressing the protrusion 31, an arm 53 for rotating the head 52, a lock handle 54, and a link 55 for transmitting the driving force of the lock handle 54 to the arm 53.

[0029] One end of the link 55 is rotatably attached to the clamp base 51, and the other end is rotatably attached to the base of the lock handle 54. One end of the arm 53 is rotatably attached to the clamp base 51, and the other end is rotatably attached to the end of the lock handle 54. The arm 53 is rotated by the lever principle, with the operating part of the lock handle 54 as the force point. The link 55 also implements a toggle mechanism. The state in which the lock handle 54 is raised is called the "unlocked state" (Figure 3). At this time, the arm 53 and head 52 are separated from the protrusion 31 and can move freely. When the lock handle 54 is pressed down from the unlocked state, the linked link 55 moves. When the lock handle 54 reaches a predetermined angle, the link 55 passes through a state close to a straight line (the toggle point). The curved surface of the arm 53 guides the link 55, forming the toggle point. The link 55 enters a self-retaining state (over-center lock) at a position slightly beyond the toggle point. Once it passes the toggle point, the head 52 presses against the protrusion 31, maintaining the clamping force even when the lock handle 54 is released. This toggle mechanism fixes the protrusion 31 in a pressed position toward the mounting portion 20. The state in which the lock handle 54 is horizontal is called the "locked state" (Figure 1). When the lock handle 54 is lifted from the locked state, the head 52 moves away from the protrusion 31, returning it to the unlocked state.

[0030] Next, the operation of this embodiment will be described. Normally, when the disc 30 is slid to a position that completely covers the opening 22, the stopper pin 44 is engaged with the pin receiver 25, and the disc 30 is fixed in place. Next, the lock handle 54 is operated to set the disc 30 in the locked state. In the locked state, the disc 30 is pressed against the seat ring 23, sealing the opening 22.

[0031] When cleaning, the lock handle 54 is operated to set the lock to the unlocked state. In the unlocked state, the disc 30 is separated from the seat ring 23, so even when the disc 30 is slid, it does not slide against the seat ring 23, resulting in less wear on the seat ring 23. Next, the disc 30 is slid counterclockwise by 90 degrees to open the opening 22. An air blow nozzle is inserted into the branch pipe 11 through the opening 22 to clean the inside of the branch pipe 11. After cleaning is complete, the disc 30 is slid to a position that completely covers the opening 22, and the stopper pin 44 is engaged with the pin receiver 25, fixing the disc 30 in place. Next, the lock handle 54 is operated to set the lock state.

[0032] Next, the effects of this embodiment will be described. In this embodiment, the slide valve 100 comprises an attachment part 20 attached to the branch pipe 11 and having a communication passage 21 formed therein that communicates with the inside of the branch pipe 11, a seat ring 23 provided on the end face of the opening 22, a disc 30 that covers the opening 22, a slide part 40 that slides the disc 30 along the surface of the opening 22 to open and close the opening 22, and a toggle clamp 50 that presses the disc 30 against the attachment part 20; when the disc 30 is pressed by the toggle clamp 50, the disc 30 is pressed against the seat ring 23 to seal the opening 22, and when the disc 30 is not pressed, the disc 30 is separated from the seat ring 23 and can slide without sliding against the seat ring 23.

[0033] As a result, when the disc 30 is not pressed, the disc 30 is separated from the seat ring 23 and can slide without sliding against the seat ring 23, thereby reducing wear on the seat ring 23 compared to conventional designs. Furthermore, because the disc 30 is separated from the seat ring 23, the internal pressure of the branch pipe 11 can be released before the opening operation. Furthermore, because the seat ring 23 can be replaced with the disc 30 in the open state, replacing the seat ring 23 is easier than conventional designs. Since the user can replace the seat ring 23, maintenance costs can be reduced. Furthermore, since the valve can be fully opened simply by sliding the disc 30, work efficiency can be improved. Since no parts need to be removed from the slide valve 100 when opening or closing the disc 30, the possibility of losing parts is reduced.

[0034] Furthermore, in this embodiment, the toggle clamp 50 is provided on the opposite side of the slide portion 40 from the disk 30 , and presses the protrusion 31 through the through hole 41 .

[0035] This simplifies manufacturing since it is only necessary to provide the toggle clamp 50 on the side of the slide portion 40 opposite the disk 30.

[0036] Furthermore, in this embodiment, the toggle clamp 50 has a head 52 for pressing the protrusion 31, an arm 53 for rotating the head 52, a lock handle 54, and a link 55 for transmitting the driving force of the lock handle 54 to the arm 53, and when the lock handle 54 reaches a predetermined angle, the head 52 presses the protrusion 31 and the clamping force is maintained.

[0037] This allows the disc 30 to be maintained in a pressed state. Furthermore, no tools are required for operation, as the lock handle 54 is simply set to the unlocked state and then the disc 30 is slid open. The lock handle 54 has an independent locking mechanism, which reduces the possibility of the disc 30 opening due to incorrect operation. The locked and unlocked states of the lock handle 54 can be visually confirmed, making it easy to check if the disc 30 has been left closed.

[0038] Furthermore, in this embodiment, the slide portion 40 is provided with a stopper pin 44 that protrudes toward the mounting portion 20, and the mounting portion 20 is provided with a pin receiver 25 that receives the stopper pin 44, and the stopper pin 44 is engaged by the pin receiver 25 at a position where the disk 30 covers the opening 22.

[0039] This reduces the possibility of the disc 30 sliding when the opening 22 is closed. Even if an attempt is made to open the opening 22 by mistake when the internal pressure of the branch pipe 11 is high, the disc 30 is unlikely to fly out, improving safety.

[0040] In this embodiment, the branch pipe 11 corresponds to the pipe line of the first invention, and the toggle clamp 50 corresponds to the pressing portion of the first to third inventions.

[0041] [Modification] Although the toggle clamp 50 is used in the above embodiment and its modified examples, the present invention is not limited to this and any other structure that can press the disk 30 can be used.

[0042] Furthermore, in the above embodiment and its modifications, the disk 30 is provided with the protrusion 31, but this is not limiting, and the protrusion 31 may not be provided. In this case, for example, a configuration can be adopted in which the length of the head 52 is long and the outer surface of the disk 30 is directly pressed against it.

[0043] Furthermore, the above-described embodiments and their modifications can be applied to each other. Furthermore, the present invention is not limited to the above-described embodiment and its modifications, and can be applied to other cases without departing from the spirit of the present invention. For example, the slide valve 100 is not limited to a specific user, but can be applied to all users who frequently perform cleaning work inside pipes. It can also be applied to uses other than cleaning inside pipes. [Explanation of symbols]

[0044] 100...slide valve, 10...main pipe, 11...branch pipe, 20...mounting portion, 21...communicating passage, 22...opening, 23...seat ring, 24...bearing, 25...pin receiver, 30...disk, 31...projection, 40...slide portion, 41...through hole, 42...rotating shaft, 43...nut, 44...stopper pin, 50...toggle clamp, 51...clamp base, 52...head, 53...arm, 54...lock handle, 55...link, S...axial direction

Claims

1. an attachment portion attached to a pipeline through which a fluid flows and having a communication passage formed therein that communicates with the pipeline; a seat ring provided on an end surface of the opening of the communication passage; a disk covering the opening; a slide portion that slides the disk along a surface of the opening so as to open and close the opening; a pressing portion that presses the disk toward the mounting portion, When the disk is pressed by the pressing portion, the disk is pressed against the seat ring to seal the opening, and when the disk is not pressed, the disk is separated from the seat ring and can slide without sliding against the seat ring. the pressing portion is provided on the opposite side of the slide portion from the disk, and presses the disk toward the mounting portion via a through hole formed in the slide portion; The pressing unit has a head for pressing the disk, an arm for rotating the head, a lock handle, and a link for transmitting the driving force of the lock handle to the arm, and when the lock handle reaches a predetermined angle, the head presses the disk and the clamping force is maintained.

2. an attachment portion attached to a pipeline through which a fluid flows and having a communication passage formed therein that communicates with the pipeline; a seat ring provided on an end surface of the opening of the communication passage; a disk covering the opening; a slide portion that slides the disk along a surface of the opening so as to open and close the opening; a pressing portion that presses the disk toward the mounting portion, When the disk is pressed by the pressing portion, the disk is pressed against the seat ring to seal the opening, and when the disk is not pressed, the disk is separated from the seat ring and can slide without sliding against the seat ring. The slide portion is provided with a stopper pin that protrudes toward the mounting portion, The mounting portion is provided with a pin receiver that receives the stopper pin, A slide-type valve, wherein the stopper pin is engaged with the pin receiver when the disk is in a position where it covers the opening.

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