Expandable fluid blocking device

Abstract

An expandable fluid blocking device of the present invention comprises: an upper cover; a lower cover coupled to the upper cover; a valve seat that encompasses the circumferences of the upper cover and the lower cover; a push plate for expanding the valve seat in the circumferential direction; and a driving means for driving the push plate. Therefore, the expansion and contraction of the valve seat are physically implemented by the mechanical driving means, and thus an effect of increasing holding power in a pipe such as a water supply pipe is provided.

Description

Expandable fluid shutoff device

[0001] The present invention relates to an expandable fluid blocking device, and more particularly, to an expandable fluid blocking device that increases sealing force inside a pipe.

[0002] Typically, sluice valves are installed at intervals of 1 to 3 km in water pipes, and when replacing a section of water pipe, the sluice valves before and after must be closed to block the flow of water.

[0003] However, since all the water valves before and after the water pipe replacement section are closed at long intervals even though the section is only a small section, the water supply will inevitably be cut off from the water supply pipes that branch out to each household and other uses from the section between the water valves before and after the water pipe replacement section, which will eventually lead to a large area of ​​water supply cutoff, causing inconvenience to residents and damage to businesses.

[0004] In addition, there are problems such as increased water outage periods due to poor water supply and malfunction of the water supply valve due to aging, or excessively long time required for water pipe replacement work, which increases the time for water outage and increases inconvenience to residents.

[0005] To solve these problems, a method of replacing pipes such as water pipes using a non-stop valve construction method is being applied. The non-stop valve construction method installs a non-stop valve on water pipes or other pipes to stop the flowing water or fluid or control the flow rate.

[0006] This type of non-return valve is composed of a valve disc, and a rubber valve seat forming the outer body of the valve disc is pressed against the inner diameter surface of a water pipe, thereby creating an index that blocks the flow of water.

[0007] Figure 1 is a schematic diagram showing a conventional valve disc.

[0008] As illustrated in Fig. 1, a conventional valve disc adopted for a water supply valve is composed of a skeletal frame (11) that serves as a skeleton, and a valve seat (12) made of rubber that is integrally injection-molded into the skeletal frame (11). In particular, the lower and side ends of the valve seat (12) are formed as a seat surface (13) that is pointed and supports a point in a triangular shape so as to be pressed into the inner diameter surface of a water pipe (14) in a one-point support manner.

[0009] However, the conventional valve disc adopted for the above-mentioned non-return valve and its construction process had the following disadvantages.

[0010] First, the valve disc was operated up and down to increase the index, but when the valve disc was lowered, the rubber valve seat attached to the disc came into contact with the perforation area (sharp part due to perforation) and was damaged.

[0011] Accordingly, there is a problem of short water resistance and lifespan due to loss of function caused by damage and slippage of the rubber valve seat.

[0012] Second, in order to achieve a perfect index, the valve seat of the valve disc must be completely pressed against the inner surface of the water pipe. However, in this case, excessive force is applied to the valve disc for the index, which significantly reduces workability and takes a long time.

[0013] That is, since the valve seat of the valve disc is completely pressed against the inner surface of the water pipe and the index is formed only when the valve is rotated with high torque, the operator's workability for high torque operation is low, and accordingly, there is a disadvantage in that the work time is long.

[0014] Third, the valve disc was operated up and down to adjust the index, but there was a problem in that the rubber valve seat attached to the disc was pushed up and damaged when the valve disc was lowered.

[0015] Due to the aforementioned problem, the valve seat is not completely sealed against the inner surface of the water pipe, which ultimately reduces the index effect of the valve seat.

[0016] Therefore, there is a need for the development of an improved form of fluid blocking device with improved exponential power.

[0017] [Prior Art Literature]

[0018] [Patent Document]

[0019] (Patent Document 1) Patent Publication No. 1067247 (registered on September 19, 2011)

[0020] (Patent Document 2) Patent Publication No. 1157077 (registered on June 11, 2012)

[0021]

[0022] The present invention has been devised to solve the above-mentioned problems of the prior art, and the purpose of the present invention is to provide an expandable fluid blocking device that physically implements expansion and contraction of a valve seat to increase the gripping force in a pipe such as a water pipe.

[0023] In addition, another object of the present invention is to provide an expandable fluid shutoff device that increases the sealing force of the valve seat by applying the same force to the entire valve seat when the valve seat expands and comes into contact with a pipe.

[0024]

[0025] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0026] In order to achieve the above-described purpose, the expandable fluid blocking device of the present invention is characterized by including: an upper cover; a lower cover coupled to the upper cover; a valve seat surrounding the circumferences of the upper cover and the lower cover; a pressure plate for expanding the valve seat in the circumferential direction; and a driving means for driving the pressure plate.

[0027] In addition, the upper cover and lower plate are characterized in that first and second sliding grooves are formed respectively in which the sliding plate slides.

[0028] In addition, the first sliding groove is characterized in that two or more are radially arranged at equal intervals on the upper cover, the second sliding groove is characterized in that two or more are radially arranged at equal intervals on the lower cover, and the first sliding groove and the second sliding groove are radially arranged in an alternating manner.

[0029] In addition, the end of the pressure plate that expands the valve seat is characterized in that it is configured to overlap with the end of an adjacent pressure plate.

[0030] In addition, it is characterized in that a valve seat pressing plate is further provided to fix the valve seat to the upper cover and the lower cover.

[0031] In addition, the driving means is characterized by comprising an adjusting screw that is screw-connected to the cover, a sliding member that is installed across the adjusting screw, and a link that connects the sliding member and the pressing plate.

[0032] In addition, the upper cover is characterized in that a slot is formed through which the link crosses.

[0033] In addition, the upper cover is characterized in that a through hole is formed in which a sliding member is installed, and an O-ring is placed between the adjusting screw and the sliding member and between the sliding member and the through hole.

[0034] In addition, the driving means is characterized by comprising a spiral plate that is arranged between the upper cover and the lower cover and rotates and has driving screw threads formed on both sides, and a driven screw thread formed on the pressing plate to mesh with the driving screw thread.

[0035] In addition, the upper cover and the lower cover are characterized in that a through hole is formed in the upper cover and the lower cover, a ring gear is formed on the inner surface of the spiral plate, and a planetary gear is further provided that is in contact with the ring gear.

[0036] In addition, the planetary gear is formed with an adjustment knob, and the upper cover is characterized in that an adjustment hole is formed to expose the adjustment knob.

[0037] In addition, a control knob is formed in the center of the spiral plate, and a control hole for exposing the control knob is formed in the upper cover.

[0038] In addition, the driving means is characterized by comprising a cam plate that is arranged between the upper cover and the lower cover to rotate and has a cam groove formed therein, and a cam projection formed on the pressing plate to move along the cam groove.

[0039] In addition, the upper cover and the lower cover are characterized in that a through hole is formed in the upper cover and the lower cover, a ring gear is formed on the inner surface of the cam plate, and a planetary gear is further provided that is in contact with the ring gear.

[0040] In addition, the planetary gear is formed with an adjustment knob, and the upper cover is characterized in that an adjustment hole is formed to expose the adjustment knob.

[0041] In addition, the cam plate is characterized in that an adjustment knob is formed in the center, and an adjustment hole is formed in the upper cover to expose the adjustment knob.

[0042] According to the expandable fluid blocking device of the present invention, the expansion and contraction of the valve seat is physically implemented by the driving means, thereby providing the effect of increasing the gripping force in a pipe such as a water pipe.

[0043] Moreover, due to the expansion and contraction of the valve seat, the rubber-made valve seat does not come into contact with the housing or the perforation (sharp part resulting from the perforation) during the valve's movement, so no damage occurs.

[0044] In other words, it is possible to improve durability by improving damage and slippage of conventional rubber valve seats, while extending the installation sealing capacity and lifespan.

[0045] Additionally, when the valve seat expands and comes into contact with the pipe, the force applied to the entire valve seat is applied equally, thereby increasing the sealing force of the valve seat.

[0046]

[0047] The effects according to the technical idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0048] Figure 1 is a schematic diagram showing a conventional valve disc.

[0049] Figures 2 and 3 are exemplary drawings showing the installation sequence of an expandable fluid blocking device according to the present invention.

[0050] FIG. 4 is a perspective view illustrating an expandable fluid blocking device according to a first embodiment of the present invention.

[0051] Figures 5 to 7 are perspective views showing an exploded view of an expandable fluid blocking device according to a first embodiment of the present invention.

[0052] FIG. 7a is an exemplary diagram illustrating the operation of a seal of an expandable fluid blocking device according to a first embodiment of the present invention.

[0053] Figure 8 is a perspective view illustrating an expandable fluid blocking device according to a second embodiment of the present invention.

[0054] Figures 9 to 11 are perspective views showing an exploded view of an expandable fluid blocking device according to a second embodiment of the present invention.

[0055] FIG. 12 is a perspective view illustrating an expandable fluid blocking device according to a third embodiment of the present invention.

[0056] Fig. 13 is a perspective view showing the internal configuration of an expandable fluid blocking device according to a third embodiment of the present invention.

[0057] Fig. 14 is a front view showing the internal configuration of an expandable fluid blocking device according to a third embodiment of the present invention.

[0058] FIG. 15 is a perspective view illustrating an expandable fluid blocking device according to a fourth embodiment of the present invention.

[0059] Figures 16 and 17 are perspective views showing an exploded view of an expandable fluid blocking device according to a fourth embodiment of the present invention.

[0060] Fig. 18 is a front view showing the internal configuration of an expandable fluid blocking device according to a fourth embodiment of the present invention.

[0061] FIG. 19 is a perspective view illustrating an expandable fluid blocking device according to a fifth embodiment of the present invention.

[0062] FIG. 20 is a perspective view showing the internal configuration of an expandable fluid blocking device according to a fifth embodiment of the present invention.

[0063] Fig. 21 is a front view showing the internal configuration of an expandable fluid blocking device according to a fifth embodiment of the present invention.

[0064] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention, and methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0065] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in their common sense to those of ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0066] Additionally, the singular in this specification may also include the plural unless specifically stated otherwise in the text. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, operations, and / or elements.

[0067]

[0068] Figures 2 and 3 are exemplary drawings showing the installation sequence of an expandable fluid blocking device according to the present invention.

[0069] As shown in FIGS. 2 and 3, an expandable fluid blocking device (A) according to the present invention is installed in a pipe (P) such as a water pipe to block the flow of water.

[0070] That is, the expandable fluid blocking device (A) of the present invention is configured to index a pipe (P) such as a water pipe and a branched T-shaped separator pipe.

[0071] In addition, the expandable fluid blocking device (A) of the present invention is installed by a transfer unit.

[0072]

[0073] First embodiment

[0074] FIG. 4 is a perspective view illustrating an expandable fluid blocking device according to a first embodiment of the present invention, FIGS. 5 to 7 are perspective views illustrating an exploded view of an expandable fluid blocking device according to a first embodiment of the present invention, and FIG. 7a is an exemplary view illustrating the operation of a seal of an expandable fluid blocking device according to a first embodiment of the present invention.

[0075] As illustrated in FIGS. 4 to 7A, an expandable fluid blocking device (A) according to a first embodiment of the present invention comprises a circular upper cover (100), a lower cover (200) coupled to the upper cover (100) to close an open end of the upper cover (100), a valve seat (300) surrounding the circumferences of the upper cover (100) and the lower cover (200), a pressure plate (400) that expands the valve seat (300) in the circumferential direction, and a driving means (500) that drives the pressure plate (400).

[0076] First, the upper cover (100) and lower cover (200) are connected by screws or the like to form an overall cylindrical shape.

[0077] In addition, the valve seat (300) is formed in a ring shape (donut) so as to surround the upper cover (100) and the lower cover (200). At this time, since the valve seat (300) is formed of a material having elasticity such as rubber, the expansion of the sealing plate (400) causes it to come into close contact with the inside of a pipe such as a water pipe, thereby blocking the flow of water.

[0078] And, the above-mentioned plate (400) is arranged along the perimeter of the upper cover (100) and the lower cover (200) and is expanded by the driving means (500).

[0079] Meanwhile, the driving means (500) drives the pressing plate (400) to expand and contract along the perimeter of the upper cover (100) and the lower cover (200).

[0080] In addition, the upper cover (100) and lower cover (200) are formed with first and second sliding grooves (110, 210) through which the sliding plate (400) slides, respectively.

[0081] At this time, two or more of the first sliding grooves (110) are radially arranged at equal intervals on the upper cover (100), and two or more of the second sliding grooves (210) are radially arranged at equal intervals on the lower cover (200), and the first sliding grooves (110) and the second sliding grooves (210) are radially arranged in an alternating manner.

[0082] Specifically, the first sliding grooves (110) are radially arranged in three pieces at 120-degree intervals on the upper cover (100), the second sliding grooves (210) are radially arranged in three pieces at 120-degree intervals on the lower cover (200), and the first sliding grooves (110) and the second sliding grooves (210) are radially arranged with an offset from each other to have a 60-degree interval.

[0083] That is, in the embodiment of the present invention, the first and second sliding grooves (110, 210) can be installed in a number of four or more depending on the pipe size.

[0084] According to the arrangement structure of the first sliding groove (110) and the second sliding groove (210), the push plate (400) is evenly placed along the perimeter of the upper cover (100) and the lower cover (200). By evenly placing the push plate (400) in this way, the valve seat (300) is uniformly expanded, thereby improving the adhesion with the pipe.

[0085] As illustrated in Fig. 7a, the end of the push plate (400) that expands the valve seat (300) is configured to overlap with the end of the adjacent push plate (400). That is, the ends of the neighboring push plates (400) overlap with each other and are connected so that no gap is created and the valve seat (300) is expanded evenly.

[0086] In addition, a valve seat pressing plate (600) is further provided to fix the valve seat (300) to the upper cover (100) and the lower cover (200).

[0087] Accordingly, the valve seat (300) expanded by the valve seat pressing plate (600) is firmly fixed to the upper cover (100) and the lower cover (200) to prevent separation.

[0088] At this time, the valve seat press plate (600) is firmly fixed to the upper cover (100) and lower cover (200) by screws.

[0089]

[0090] Meanwhile, the driving means (500) according to the first embodiment is composed of an adjusting screw (510) that is screw-connected to the cover (200), a sliding member (520) that is installed across the adjusting screw (510), and a link (530) that connects the sliding member (520) and the pressing plate (400).

[0091] In addition, a hinge groove (521) connected to the link (530) is formed in the sliding member (520), and a hinge member (540) connected to the link (530) is formed in the sliding plate (400).

[0092] Accordingly, the sliding member (520) slides by the forward and reverse rotation of the adjusting screw (510), and the link (530) pushes or pulls the push plate (400) by the sliding of the sliding member (520), causing the push plate (400) to expand or contract the valve seat (300).

[0093] And, a slot (101) is formed in the upper cover (100) through which the link (530) passes.

[0094] Meanwhile, a through hole (120) in which a sliding member (520) is installed is formed in the upper cover (100), and an O-ring (550) is installed between the adjusting screw (510) and the sliding member (520) and between the sliding member (520) and the through hole (120).

[0095] At this time, a ring groove (522) into which the O-ring (550) is fitted is formed in the sliding member (520).

[0096] Leakage is prevented by this type of O-ring (550).

[0097] Additionally, a hexagonal head-shaped adjustment knob (511) is formed on the above adjustment screw (510).

[0098] In this way, a transfer unit or tool is attached to the above adjustment knob (511) to rotate the adjustment screw in the forward and reverse directions.

[0099] According to the present invention, the expansion and contraction of the valve seat (300) is physically implemented by a mechanical driving means to increase the gripping force in a pipe such as a water pipe.

[0100] Moreover, due to the expansion and contraction of the valve seat (300), the rubber material valve seat (300) does not come into contact with the housing or the perforation (sharp part due to perforation) during the movement of the valve, so no damage occurs.

[0101] In other words, it is possible to improve durability by improving damage and slippage of conventional rubber valve seats, while extending the installation sealing capacity and lifespan.

[0102] In addition, when the valve seat (300) expands and comes into contact with the pipe, the force applied to the entire valve seat (300) is applied equally, thereby increasing the adhesion of the valve seat (300).

[0103]

[0104] Hereinafter, in describing another embodiment of an expandable fluid blocking device according to the present invention, the same component symbols are used for components having the same configuration and function as the first embodiment of the present invention, and a detailed description thereof is omitted.

[0105] Second embodiment

[0106] FIG. 8 is a perspective view illustrating an expandable fluid blocking device according to a second embodiment of the present invention, and FIGS. 9 to 11 are perspective views illustrating an exploded view of an expandable fluid blocking device according to a second embodiment of the present invention.

[0107] As illustrated in FIGS. 8 to 11, an expandable fluid blocking device (A) according to a second embodiment of the present invention comprises a circular upper cover (100), a lower cover (200) coupled to the upper cover (100) to close an open end of the upper cover (100), a valve seat (300) surrounding the circumferences of the upper cover (100) and the lower cover (200), a pressure plate (400) that expands the valve seat (300) in the circumferential direction, and a driving means (500) that drives the pressure plate (400).

[0108] First, the upper cover (100) and lower cover (200) are connected by screws or the like to form an overall cylindrical shape.

[0109] In addition, the valve seat (300) is formed in a ring shape (donut) so as to surround the upper cover (100) and the lower cover (200). At this time, since the valve seat (300) is formed of a material having elasticity such as rubber, the expansion of the sealing plate (400) causes it to come into close contact with the inside of a pipe such as a water pipe, thereby blocking the flow of water.

[0110] And, the above-mentioned plate (400) is arranged along the perimeter of the upper cover (100) and the lower cover (200) and is expanded by the driving means (500).

[0111] Meanwhile, the driving means (500) drives the pressing plate (400) to expand and contract along the perimeter of the upper cover (100) and the lower cover (200).

[0112] In addition, the upper cover (100) and lower cover (200) are formed with first and second sliding grooves (110, 210) through which the sliding plate (400) slides, respectively.

[0113] At this time, the first sliding grooves (110) are radially arranged in three pieces at 120-degree intervals on the upper cover (100), the second sliding grooves (210) are radially arranged in three pieces at 120-degree intervals on the lower cover (200), and the first sliding grooves (110) and the second sliding grooves (210) are radially arranged with each other offset so as to have a 60-degree interval.

[0114] According to the arrangement structure of the first sliding groove (110) and the second sliding groove (210), the push plate (400) is evenly placed along the perimeter of the upper cover (100) and the lower cover (200). By evenly placing the push plate (400) in this way, the valve seat (300) is uniformly expanded, thereby improving the adhesion with the pipe.

[0115] In addition, a valve seat pressing plate (600) is further provided to fix the valve seat (300) to the upper cover (100) and the lower cover (200).

[0116]

[0117] Meanwhile, the driving means (500) according to the second embodiment is configured with a spiral plate (510) that is arranged and rotates between the upper cover (100) and the lower cover (200) and has driving screw threads (511) formed on both sides, and a driven screw thread (520) formed on the press plate (400) to engage with the driving screw thread (511).

[0118] Accordingly, the driving screw thread (511) rotates according to the forward and reverse rotation of the spiral plate (510), and the sealing plate (400) formed with the driven screw thread (520) that engages with the driving screw thread (511) expands or contracts the valve seat (300).

[0119] In addition, through holes (101, 201) are formed in the upper cover (100) and the lower cover (200), a ring gear (530) is formed on the inner surface of the spiral plate (510), and a planetary gear (540) that is in contact with the ring gear (530) is further provided.

[0120] In addition, an adjustment knob (541) is formed on the above-mentioned planetary gear (540), and an adjustment hole (102) that exposes the adjustment knob (541) is formed on the above-mentioned upper cover (100).

[0121] Accordingly, by rotating the control knob (541) of the planetary gear (540) in the forward and reverse directions, the spiral plate (510) on which the ring gear (530) is formed rotates, and the push plate (400) on which the driven screw thread (520) coupled with the driving screw thread (511) of the spiral plate (510) is formed reciprocates. The push plate (400) on which the reciprocating motion occurs expands or contracts the valve seat (300).

[0122] The expandable fluid blocking device (A) according to the second embodiment of the present invention prevents the expandable fluid blocking device from moving due to its own weight after being installed in a pipe by installing a supporter, bracket, etc. in the through hole (101, 201). In particular, a supporter and bracket capable of supporting a load are necessarily installed in the through hole (101, 201) of the expandable fluid blocking device (A) arranged on the upper side of the T-shaped separator tube.

[0123] However, if it is not necessary to install a supporter or bracket in the above-mentioned through hole (101, 201), it is closed with a finishing material.

[0124]

[0125] Third embodiment

[0126] FIG. 12 is a perspective view illustrating an expandable fluid blocking device according to a third embodiment of the present invention, FIG. 13 is a perspective view illustrating an internal configuration of an expandable fluid blocking device according to a third embodiment of the present invention, and FIG. 14 is a front view illustrating an internal configuration of an expandable fluid blocking device according to a third embodiment of the present invention.

[0127] The expandable fluid blocking device of the third embodiment has the same configuration as the expandable fluid blocking device of the second embodiment, and only the differences are described.

[0128] As shown in FIGS. 12 to 14, the driving means (500) according to the third embodiment is composed of a spiral plate (510) that is arranged and rotates between the upper cover (100) and the lower cover (200) and has driving screw threads (511) formed on both sides, and a driven screw thread (520) formed on the press plate (400) to engage with the driving screw threads (511).

[0129] At this time, an adjustment knob (530) is formed in the center of the spiral plate (510), and an adjustment hole (101) that exposes the adjustment knob (530) is formed in the upper cover (100).

[0130] Accordingly, as the control knob (530) of the spiral plate (510) is rotated in the forward and reverse directions, the driving screw thread (511) rotates, and the sealing plate (400) formed with the driven screw thread (520) that engages with the driving screw thread (511) expands or contracts the valve seat (300).

[0131]

[0132] Fourth embodiment

[0133] FIG. 15 is a perspective view illustrating an expandable fluid blocking device according to a fourth embodiment of the present invention, FIGS. 16 and 17 are perspective views illustrating an expanded fluid blocking device according to a fourth embodiment of the present invention in an exploded state, and FIG. 18 is a front view illustrating the internal configuration of an expandable fluid blocking device according to a fourth embodiment of the present invention.

[0134] As illustrated in FIGS. 15 to 18, an expandable fluid blocking device (A) according to a fourth embodiment of the present invention comprises a circular upper cover (100), a lower cover (200) coupled with the upper cover (100) to close an open end of the upper cover (100), a valve seat (300) surrounding the circumferences of the upper cover (100) and the lower cover (200), a push plate (400) that expands the valve seat (300) in the circumferential direction, and a driving means (500) that drives the push plate (400).

[0135] First, the upper cover (100) and lower cover (200) are connected by screws or the like to form an overall cylindrical shape.

[0136] In addition, the valve seat (300) is formed in a ring shape (donut) so as to surround the upper cover (100) and the lower cover (200). At this time, since the valve seat (300) is formed of a material having elasticity such as rubber, the expansion of the sealing plate (400) causes it to come into close contact with the inside of a pipe such as a water pipe, thereby blocking the flow of water.

[0137] And, the above-mentioned plate (400) is arranged along the perimeter of the upper cover (100) and the lower cover (200) and is expanded by the driving means (500).

[0138] Meanwhile, the driving means (500) drives the pressing plate (400) to expand and contract along the perimeter of the upper cover (100) and the lower cover (200).

[0139] In addition, the upper cover (100) and lower cover (200) are formed with first and second sliding grooves (110, 210) through which the sliding plate (400) slides, respectively.

[0140] At this time, the first sliding grooves (110) are radially arranged in three pieces at 120-degree intervals on the upper cover (100), the second sliding grooves (210) are radially arranged in three pieces at 120-degree intervals on the lower cover (200), and the first sliding grooves (110) and the second sliding grooves (210) are radially arranged with each other offset so as to have a 60-degree interval.

[0141] According to the arrangement structure of the first sliding groove (110) and the second sliding groove (210), the push plate (400) is evenly placed along the perimeter of the upper cover (100) and the lower cover (200). By evenly placing the push plate (400) in this way, the valve seat (300) is uniformly expanded, thereby improving the adhesion with the pipe.

[0142] In addition, a valve seat pressing plate (600) is further provided to fix the valve seat (300) to the upper cover (100) and the lower cover (200).

[0143]

[0144] Meanwhile, the driving means (500) according to the fourth embodiment is configured with a cam plate (510) that is arranged between the upper cover (100) and the lower cover (200) to rotate and has a cam groove (511) formed therein, and a cam protrusion (520) formed on the pressing plate (400) to move along the cam groove (511).

[0145] In addition, through holes (101, 201) are formed in the upper cover (100) and the lower cover (200), a ring gear (530) is formed on the inner surface of the cam plate (510), and a planetary gear (540) that is in contact with the ring gear (530) is further provided.

[0146] In addition, an adjustment knob (541) is formed on the above-mentioned planetary gear (540), and an adjustment hole (102) that exposes the adjustment knob (541) is formed on the above-mentioned upper cover (100).

[0147] Accordingly, as the adjustment knob (541) of the planetary gear (540) is rotated in the forward and reverse directions, the cam plate (510) on which the ring gear (530) is formed rotates, and the push plate (400) on which the cam projection (520) combined with the cam groove (511) of the cam plate (510) is formed reciprocates. The push plate (400) on which the reciprocating motion occurs expands or contracts the valve seat (300).

[0148] The expandable fluid blocking device (A) according to the fourth embodiment of the present invention prevents the expandable fluid blocking device from moving due to its own weight after being installed in a pipe by installing a supporter, bracket, etc. in the through hole (101, 201). In particular, a supporter and bracket capable of supporting a load are necessarily installed in the through hole (101, 201) of the expandable fluid blocking device (A) arranged on the upper side of the T-shaped separator tube.

[0149] However, if it is not necessary to install a supporter or bracket in the above-mentioned through hole (101, 201), it is closed with a finishing material.

[0150]

[0151] Fifth embodiment

[0152] FIG. 19 is a perspective view illustrating an expandable fluid blocking device according to a fifth embodiment of the present invention, FIG. 20 is a perspective view illustrating an internal configuration of an expandable fluid blocking device according to a fifth embodiment of the present invention, and FIG. 21 is a front view illustrating an internal configuration of an expandable fluid blocking device according to a fifth embodiment of the present invention.

[0153] The expandable fluid blocking device of the fifth embodiment has the same configuration as the expandable fluid blocking device of the fifth embodiment, and only the differences are described.

[0154] As shown in FIGS. 19 to 21, the driving means (500) according to the fifth embodiment is configured with a cam plate (510) that is arranged between the upper cover (100) and the lower cover (200) to rotate and has a cam groove (511) formed therein, and a cam protrusion (520) formed on the pressing plate (400) to move along the cam groove (511).

[0155] At this time, an adjustment knob (530) is formed in the center of the cam plate (510), and an adjustment hole (101) that exposes the adjustment knob (530) is formed in the upper cover (100).

[0156] Accordingly, by rotating the control knob (530) of the cam plate (510) in the forward and reverse directions, the cam plate (510) rotates, and the push plate (400) formed with the cam protrusion (520) coupled with the cam groove (511) of the cam plate (510) generates a reciprocating motion. The push plate (400) that generates the reciprocating motion expands or contracts the valve seat (300).

[0157]

[0158] While preferred embodiments of the present invention have been described in detail, the technical scope of the present invention is not limited to the aforementioned embodiments and should be interpreted in accordance with the scope of the patent claims. Those skilled in the art should recognize that numerous modifications and variations are possible without departing from the scope of the present invention.

[0159]

[0160] [Explanation of symbols]

[0161] A - Expandable fluid shutoff device

[0162] 100 - Upper cover 200 - Lower cover

[0163] 300 - Valve seat 400 - Seal plate

[0164] 500 - Drivetrain

Claims

1. Top cover; A lower cover combined with the upper cover; A valve seat surrounding the perimeter of the upper cover and lower cover; A press plate for expanding the valve seat circumferentially; and An expandable fluid blocking device, characterized by comprising: a driving means for driving the above-mentioned plate.

2. In paragraph 1, An expandable fluid blocking device characterized in that the upper cover and lower plate each have first and second sliding grooves formed therein, through which the sealing plate slides.

3. In paragraph 2, An expandable fluid blocking device, characterized in that two or more of the first sliding grooves are radially arranged at equal intervals on the upper cover, two or more of the second sliding grooves are radially arranged at equal intervals on the lower cover, and the first sliding grooves and the second sliding grooves are radially arranged in an alternating manner with each other.

4. In paragraph 3, An expandable fluid shutoff device characterized in that the end of the sealing plate that expands the valve seat is configured to overlap the end of an adjacent sealing plate.

5. In paragraph 1, An expandable fluid shutoff device characterized in that it further comprises a valve seat pressing plate for fixing the valve seat to the upper cover and the lower cover.

6. In any one of paragraphs 1 to 5, The above driving means is, An expandable fluid shutoff device characterized by comprising: an adjusting screw that is screw-connected to the cover; a sliding member that is installed across the adjusting screw; and a link that connects the sliding member and the sealing plate.

7. In paragraph 6, An expandable fluid blocking device characterized in that the upper cover has a slot formed through which the link passes.

8. In paragraph 7, A through hole is formed in the upper cover to install a sliding member. An expandable fluid shutoff device characterized in that an O-ring is disposed between the adjusting screw and the sliding member and between the sliding member and the through hole.

9. In any one of paragraphs 1 to 5, The above driving means is, An expandable fluid blocking device characterized by comprising a spiral plate disposed between the upper cover and the lower cover and having driving screw threads formed on both sides, and driven screw threads formed on the sealing plate to engage with the driving screw threads.

10. In paragraph 9, A through hole is formed in the upper cover and lower cover. A ring gear is formed on the inner surface of the above spiral plate, An expandable fluid shutoff device characterized in that it further comprises a planetary gear in contact with the ring gear.

11. In paragraph 10, The above planetary gear is formed with an adjustment knob, An expandable fluid shutoff device characterized in that an adjustment hole is formed in the upper cover to expose the adjustment knob.

12. In paragraph 9, A control knob is formed in the center of the above spiral plate, An expandable fluid shutoff device characterized in that an adjustment hole is formed in the upper cover to expose the adjustment knob.

13. In any one of paragraphs 1 to 5, The above driving means is, An expandable fluid blocking device characterized by comprising a cam plate formed with a cam groove and a cam projection formed on the pressing plate so as to move along the cam groove and arranged to rotate between the upper cover and the lower cover.

14. In paragraph 13, A through hole is formed in the upper cover and lower cover. A ring gear is formed on the inner surface of the above cam plate, An expandable fluid shutoff device characterized in that it further comprises a planetary gear in contact with the ring gear.

15. In paragraph 14, The above planetary gear is formed with an adjustment knob, An expandable fluid shutoff device characterized in that an adjustment hole is formed in the upper cover to expose the adjustment knob.

16. In paragraph 13, An adjustment knob is formed in the center of the above cam plate, An expandable fluid shutoff device characterized in that an adjustment hole is formed in the upper cover to expose the adjustment knob.

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