Rotary opening / closing device for water pressure test of fire pipe
The rotary opening and closing device for fire piping simplifies the discharge of residual fire extinguishing water, eliminating the need for separate bypass pipes and reducing construction time and costs by facilitating efficient hydrostatic pressure testing.
Patent Information
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- DOWON ENG & ARCHITECTURE
- Filing Date
- 2025-08-30
- Publication Date
- 2026-07-29
AI Technical Summary
Existing hydrostatic pressure testing of fire piping requires dismantling and reassembling sprinkler heads for drainage, leading to excessive labor and time, and often compromises the integrity of the test by using air pressure instead of hydrostatic pressure, with the need for separate bypass pipes complicating the process and increasing construction costs.
A rotary opening and closing device for fire piping that allows easy discharge of residual fire extinguishing water through a watertight rotary moving pipe, eliminating the need for separate bypass pipes by incorporating a fire extinguishing pipe with a cutting section, upper and lower fixing rings, and a watertight plug mechanism to facilitate simple operation and sealing.
Enables efficient discharge of fire extinguishing water without separate bypass pipes, reducing construction time and costs by allowing for quick and effective hydrostatic pressure testing of fire piping systems.
Smart Images
Figure 112025099697102-PAT00001_ABST
Abstract
Description
Technology Field
[0001] The present invention relates to a rotary opening and closing device for hydrostatic pressure testing of fire piping, and more specifically, to a rotary opening and closing device for hydrostatic pressure testing of fire piping that allows fire extinguishing water remaining in the fire piping to be easily discharged through simple operation by rotating a watertight rotary moving pipe, and eliminates the need for a separate bypass pipe to discharge fire extinguishing water from thousands of sprinkler heads installed in a building, thereby saving a significant amount of time and cost in construction. Background Technology
[0002] Generally, sprinklers are automatic fire extinguishing systems that simultaneously provide fire notification and extinguish the fire at the initial stage of ignition. Because they discharge water in a mist, they are highly effective in suppressing fires and are suitable for underground buildings where fire detection or extinguishing activities are difficult, as well as areas with a large amount of combustible materials and high foot traffic.
[0003] These sprinklers are classified into wet sprinklers, negative pressure sprinklers, dry sprinklers, pre-action sprinklers, and deluge sprinklers depending on the characteristics of the equipment.
[0004] A wet sprinkler is a system in which water is always pressurized within the piping from a pressurized water supply device (such as a fire pump) to a closed-type sprinkler head, and when the closed-type sprinkler opens due to heat from a fire and water flows within the piping, a wet water flow detection device activates, and water is immediately discharged through the opened head.
[0005] A negative pressure sprinkler is a sprinkler system in which water is always pressurized to positive pressure from the pressurized water supply device to the primary side of the pre-action water flow detection device, and the fire extinguishing water is at negative pressure up to the secondary side closed-type sprinkler head, but changes to positive pressure when the detector operates in the event of a fire and water flow occurs, thereby preventing damage caused by the opening of the sprinkler head in the event of a non-fire.
[0006] In addition, a dry sprinkler is a sprinkler system in which a closed sprinkler head is attached to a pipe containing compressed air or nitrogen. When the sprinkler head opens and compressed air is released, the dry water flow detection device opens due to water pressure, and fire extinguishing water flows into the pipe and is discharged through the opened sprinkler head. Such dry sprinklers are installed restrictively in places where the indoor temperature of the protected area within the building cannot be maintained at 4°C or higher.
[0007] Generally, the most commonly used sprinkler system is the wet type, which is inexpensive and highly reliable. However, wet sprinklers have the disadvantage of not being usable in areas at risk of freezing during the winter; in such cases, the dry negative-pressure system can be used. Closed-type sprinkler heads from the wet system can be used as is, but upward-facing heads should be used whenever possible; if downward-facing heads must be used, dry pendant heads should be installed.
[0008] In addition, since there is no water in the piping of dry sprinkler systems, when downward-type heads are installed, once the system is activated and water is supplied, water enters the downward-type head and remains even after drainage. For this reason, there was a problem in that the water in the secondary piping had to be completely drained after activation.
[0009] In addition, in actual construction sites, ceiling hangers are often installed for interior decoration; in such cases, if sprinkler heads are installed in a downward manner, a performance test must be conducted through a water pressure inspection during the water pressure performance testing process after the sprinkler installation.
[0010] In the hydrostatic pressure performance inspection of such fire piping, there is a problem in that sprinkler heads must be individually detached and reassembled for drainage after the pressure test. This increases the labor required to dismantle and reassemble the sprinkler heads from the piping, and consequently, the work time for detaching and reassembling each individual sprinkler head installed at regular intervals becomes excessive.
[0011] Furthermore, during the building completion phase, there was a problem in that sprinkler performance testing could not be properly conducted. This was because, in order to meet the completion deadline, the water pressure test was either not performed or was shortened, even though sufficient performance testing should have been carried out during the testing process. In addition, problems were arising where the actual performance of the sprinklers could not be verified because the water pressure test was substituted with air pressure.
[0012] Furthermore, the current situation is that the actual performance of sprinklers cannot be verified because water pressure performance tests are being conducted using compressed air instead of hydrostatic pressure.
[0013] To solve these problems, a fire extinguishing pipe (110) installed in a building to supply fire extinguishing water to suppress a fire when a fire occurs; a bypass pipe (130) installed in the fire extinguishing pipe (110) to discharge fire extinguishing water within the fire extinguishing pipe (110) after a hydrostatic pressure test of the fire extinguishing pipe (110) is performed; and a bypass pipe (130) installed in the fire extinguishing pipe (110) and remaining within the fire extinguishing pipe (110) after the hydrostatic pressure test of the fire extinguishing pipe (110) is completed
[0014] It includes an opening / closing valve member (150) installed in the bypass pipe (130) to discharge the fire extinguishing water; wherein the opening / closing valve member (150) is connected to the bypass pipe (130) and includes a valve body unit (151) formed with a ball storage space (153) and first and second storage spaces (154, 155) so as to install a valve opening / closing unit (161) that opens / closes a flow path inside, a valve opening / closing unit (161) rotatably installed in the first storage space (154) formed inside the valve body unit (151), and a valve stem unit (171) installed in the valve opening / closing unit (161) to rotate the valve opening / closing unit (161); wherein the valve stem unit (171) rotates the ball valve (162) of the valve opening / closing unit (161). A valve stem body (172) is formed to allow the valve stem body (172) to be fastened to a fastening hole (164) formed in the ball valve (162) of the valve opening / closing unit (161), and a fastening screw portion (173) is formed protruding from the lower part of the valve stem body (172) so as to allow the first packing ring (168) of the valve opening / closing unit (161) to be installed in a state of close contact with the valve body body (152) and to press the first packing ring (168), and a packing seating projection (174) is formed protruding from the valve stem body (172) so as to allow the first packing ring (168) to be pressed and installed in a state of close contact with the valve body body (152), and a third packing material (175) is installed in the valve stem body (172) and the valve stem space (158) to maintain airtightness of the valve stem space (158) formed in the valve body unit (151), and the An opening and closing device for a hydrostatic pressure test of a fire piping system, characterized in that a fixing nut (177) is fastened to the thread (159) of the valve stem space (158) so that the valve stem body (172) is stably coupled to the thread (159) of the valve stem space (158), and a handle (178) is installed on the valve stem body (172) so that the ball valve (162) can be rotated. This was disclosed in Patent Registration No. 10-2672301 (published on June 5, 2024).
[0015] However, while this conventional shut-off device for hydrostatic pressure testing of fire piping can quickly discharge fire extinguishing water remaining in the fire piping (110) after hydrostatic pressure testing of a number of fire piping (110) installed in a building and can easily discharge fire extinguishing water by simple operation through the rotation of the handle (178) of the shut-off valve member (150), it requires a bypass pipe (130) separately connected to the fire piping (110), and thus there was a problem that a lot of time and cost were required to install the bypass pipe (130) to discharge fire extinguishing water from thousands of sprinkler heads (111) installed in the building. Prior art literature
[0016] (KR) Republic of Korea Patent Registration No. 10-2672301 (Published June 5, 2024) The problem to be solved
[0017] The present invention is intended to solve the above-mentioned problems and comprises a firefighting connection pipe having a connecting pipe body, an upper inner threaded part, an upper outer threaded part, a lower inner threaded part, a lower outer threaded part, an upper ring groove, a lower ring groove, a front water passage hole, and a rear water passage hole; a watertight rotary moving pipe having a pipe body, an upper inner ring groove, an upper sealing ring, a lower inner ring groove, a lower sealing ring, a front through hole, a rear through hole, a left water passage hole, and a right water passage hole; an upper fixing ring having an image mark indicating a closing boundary line, an arrow indicating an opening boundary line, and an inner threaded part, a lower fixing ring having an inner threaded part; a front and rear water passage opening / closing mechanism having a watertight plug, a plug, a support bar, a support plate, a spring, a sliding water passage opening / closing rod, a wrench bolt hole, and a headless wrench bolt; and a firefighting pipe having a cutting part, an outer threaded part on one side, and an outer threaded part on the other side, thereby enabling a simple [unclear] due to the rotation of the watertight rotary moving pipe The purpose is to provide a rotary shut-off device for hydrostatic pressure testing of fire piping that allows fire extinguishing water remaining in the fire piping to be easily discharged through operation, and eliminates the need for a separate bypass pipe to discharge fire extinguishing water from thousands of sprinkler heads installed in the building, thereby saving significant time and costs in construction.
[0018] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem
[0019] To achieve the above purpose, the present invention comprises a fire extinguishing pipe (60) that is installed in multiple numbers in a building to supply fire extinguishing water so as to suppress a fire when a fire occurs, wherein a sprinkler head (61) is mounted on the tip, but a cutting portion (62) is formed that is cut off before reaching the sprinkler head (61), a one-sided external threaded portion (62a) is formed on one side of the cutting portion (62), and a other-sided external threaded portion (62b) is formed on the other side of the cutting portion (62);
[0020] On one side, an upper inner screw portion (11a) is screw-coupled to the one inner screw portion (62a) of the fire pipe (60) cutting portion (62), and on the other side, a lower inner screw portion (11b) is screw-coupled to the other outer screw portion (62b) of the cutting portion (62). A connecting pipe body (11) is formed, which is a pipe body that is connected to the cutting portion (62) to connect the fire pipe (60). A front water passage hole (12) is formed in the center of the front side of the connecting pipe body (11), and a rear water passage hole (13) is formed in the center of the rear side of the connecting pipe body (11). An upper outer screw portion (11aa) is formed on the outer surface of the upper part, and a lower outer screw portion (11ba) is formed on the outer surface of the lower part. The lower part of the upper outer screw portion (11aa) A firefighting connecting pipe (10) having an upper ring groove (14) formed in a ring shape around the front and rear sides at the upper end of the connecting pipe body (11), and a lower ring groove (15) formed in a ring shape around the front and rear sides at the lower end of the connecting pipe body (11) at the lower end of the outer screw portion (11ba);
[0021] A pipe body (21), which is a pipe body, is formed in close contact with the outer surface of the connecting pipe body (11) of the fire connection pipe (10). On the inner surface of the upper part of the pipe body (21), an upper inner ring groove (21aa) is formed by a recess corresponding to the upper ring groove (14) so that the upper sealing ring (21a) is in close contact to form a watertight seal. On the inner surface of the lower part, a lower inner ring groove (21ba) is formed by a recess corresponding to the lower ring groove (15) so that the lower sealing ring (21b) is in close contact to form a watertight seal. A front through hole (22) is formed on the extension line of the front water passage hole (12) at the front center, and a rear through hole (23) is formed on the extension line of the rear water passage hole (13) at the rear center. A left water passage hole (24) is formed at the left center, and a right water passage hole (25) is formed at the right center. At the center of the front through hole (22) A watertight rotating moving tube (20) that rotates watertightly in the front and rear directions, with a reference line (26) formed vertically in the upper and lower directions and positioned at the arrow (31) indicating the closing boundary line at the top;
[0022] An upper fixing ring (30) that is fixedly coupled by forming an inner threaded portion (33) that is watertightly screw-coupled to the upper outer threaded portion (11aa) of the fire connection pipe (10), wherein an arrow (31) indicating a closing boundary line is formed on the lower front outer surface and an arrow (32) indicating an opening boundary line is formed on the lower right outer surface, thereby blocking and guiding upward movement during rotational movement of the watertight rotating moving pipe (20);
[0023] A lower fixing ring (40) that is fixedly coupled by having an inner screw portion (41) formed therein that is screw-coupled in a watertight manner to the outer screw portion (11ba) of the lower part of the fire connection pipe (10), thereby blocking downward movement and guiding the watertight rotating moving pipe (20) during rotational movement; and
[0024] A watertight plug (51) is formed, each having a rubber plug (51a) that is watertight and inserted into the front and rear passages (22, 23) of the watertight rotating moving pipe (20) respectively, and has a length that extends to the front and rear passages (12, 13) of the fire connection pipe (10), a metal support bar (51b) inserted into the center of the plug (51a), and a support plate (51c) which is a plate chain located on the outer surface of the support bar (51b) and extends in length to the left and right sides; a spring (52, 52a) is formed, each having a spring positioned to surround the outer surface of the watertight plug (51) and fixed in close contact with the outer surface of the watertight rotating moving pipe (20) to spring outward; and a spring (52, 52a) is formed, each having a cylindrical shape that surrounds the watertight plug (51) and the spring (52, 52a), and on the front and rear center side It is characterized by having front and rear water opening / closing openings (50, 50a) each having a sliding water opening / closing rod (53) formed with a wrench bolt hole (53a) that pushes the support plate (51c) of the watertight plug (51) inwardly by screwing a headless wrench bolt (53b) into it. Effects of the invention
[0025] Thus, the present invention comprises a firefighting connecting pipe having a connecting pipe body, an upper inner threaded part, an upper outer threaded part, a lower inner threaded part, a lower outer threaded part, an upper ring groove, a lower ring groove, a front water passage hole, and a rear water passage hole; a watertight rotary moving pipe having a pipe body, an upper inner ring groove, an upper sealing ring, a lower inner ring groove, a lower sealing ring, a front through hole, a rear through hole, a left water passage hole, and a right water passage hole; an upper fixing ring having an image mark indicating a closing boundary line, an arrow indicating an opening boundary line, and an inner threaded part; a lower fixing ring having an inner threaded part; a front and rear water passage opening / closing mechanism having a watertight plug, a plug, a support bar, a support plate, a spring, a sliding water passage opening / closing rod, a wrench bolt hole, and a headless wrench bolt; and a firefighting pipe having a cutting part, an outer threaded part on one side, and an outer threaded part on the other side, thereby allowing for simple operation through the rotation of the watertight rotary moving pipe to [remove] what remains in the firefighting pipe It allows for convenient discharge of fire extinguishing water and eliminates the need for separate bypass pipes to discharge water from thousands of sprinkler heads installed in the building, thereby saving significant time and costs during construction.
[0026] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Brief explanation of the drawing
[0027] FIG. 1 is an exploded perspective view showing the connection of a rotary opening and closing device for a hydrostatic pressure test of a fire piping, which is an embodiment of the present invention. FIG. 2 is a combined perspective view showing the combined state of a rotary opening and closing device for a hydrostatic pressure test of a fire piping, which is an embodiment of the present invention. FIG. 3 is a plan cross-sectional view of the usage state showing the rear water flow opening / closing port of a rotary opening / closing device for hydrostatic pressure testing of a fire pipe, which is an embodiment of the present invention, separated from the rear water flow hole of a fire connection pipe. FIG. 4 is a plan cross-sectional view of the usage state showing the front water flow opening / closing port of a rotary opening / closing device for hydrostatic pressure testing of a fire piping, which is an embodiment of the present invention, separated from the front water flow hole of a fire connection pipe. FIG. 5 is a cross-sectional view of the usage state showing the discharge of internal firefighting water to the outside by rotating the watertight rotary moving pipe 90 degrees clockwise from the outer surface of the firefighting connection pipe while the front and rear water passage openings of the rotary opening / closing device for hydrostatic pressure testing of a firefighting pipe, which is an embodiment of the present invention, are separated from the front and rear water passage holes of the firefighting connection pipe, respectively. FIG. 6 is a front view of the usage state showing the construction of a rotary opening and closing device for hydrostatic pressure testing of a fire piping, which is an embodiment of the present invention. FIG. 7 is a cross-sectional view in use showing the construction of a rotary opening and closing device for hydrostatic pressure testing of a fire piping, which is an embodiment of the present invention. FIG. 8 is a plan view showing the construction of a rotary opening and closing device for hydrostatic pressure testing of a fire piping, which is an embodiment of the present invention, in a cutaway view of the usage state. Specific details for implementing the invention
[0028] The present invention will be described in more detail below with reference to the attached drawings.
[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement them. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.
[0030] In order to clearly explain the invention in the drawings, parts unrelated to the explanation have been omitted, and the same reference numerals have been used for identical or similar components throughout the specification. The scope of the invention should not be interpreted as being limited by the embodiments described in the text, and since the embodiments are subject to various modifications and may take various forms, the scope of the invention should be understood to include equivalents capable of realizing the technical concept.
[0031] Throughout the specification of the present invention, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members in between. Furthermore, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.
[0032] The terms used in this invention are defined considering their functions within the invention; however, since these may vary depending on the intentions or practices of the user or operator, the definitions of these terms should be interpreted in a meaning and concept consistent with the technical details of this invention.
[0033] Furthermore, optional terms in the embodiments below are used to distinguish one component from another, and the components are not limited by said terms. In describing the present invention below, detailed descriptions of related prior art that may unnecessarily obscure the essence of the invention are omitted.
[0034] The rotary opening and closing device for a water pressure test of a fire pipe according to the present invention comprises a fire pipe connection pipe (10) having a connecting pipe body (11) that is connected to a fire pipe (60), a watertight rotating movable pipe (20) that is watertightly attached to the outer surface of the fire pipe connection pipe (10) and rotates to the left and right sides, an upper fixing ring (30) that guides the rotation of the watertight rotating movable pipe (20) from the upper side, a lower fixing ring (40) that guides the rotation of the watertight rotating movable pipe (20) from the lower side, and a headless wrench bolt (53b) that is loosened from the wrench bolt hole (53a) to open the front and rear water passage holes (12, 13) of the fire pipe connection pipe (10), rotates the watertight rotating movable pipe (20) to discharge fire extinguishing water inside the fire pipe (60), and tightens the headless wrench bolt (53b) from the wrench bolt hole (53a) to open the front and rear water passage holes (12, 13) of the fire pipe connection pipe (10), and then the headless wrench bolt (53b) is tightened from the wrench bolt hole (53a) to open the fire pipe connection pipe (10) It consists of a front and rear water opening / closing port (50, 50a) that seals the front and rear water passages (12, 13), and a fire piping (60) having a sprinkler head (61) and a cutting section (62).
[0035] The above fire pipe connection pipe (10) has an upper inner screw portion (11a) on one side to which the one inner screw portion (62a) of the fire pipe (60) cutting portion (62) is screw-coupled, and on the other side to which the other outer screw portion (62b) of the cutting portion (62) is screw-coupled, and a connecting pipe body (11) which is a pipe body that is connected to the cutting portion (62) to connect the fire pipe (60) is formed, and a front water passage hole (12) is formed in the front center of the connecting pipe body (11), and a rear water passage hole (13) is formed in the rear center of the connecting pipe body (11), and an upper outer screw portion (11aa) is formed on the upper outer surface, and a lower outer screw portion (11ba) is formed on the lower outer surface. An upper ring groove (14) is formed in the upper part of the lower connecting pipe body (11) in a ring shape, forming a recess in the front and rear directions, and a lower ring groove (15) is formed in the lower part of the upper connecting pipe body (11) in a ring shape, forming a recess in the front and rear directions.
[0036] The above watertight rotating moving pipe (20) is formed with a pipe body (21) that is in close contact with the outer surface of the connecting pipe body (11) of the fire connecting pipe (10), and on the inner surface of the upper part of the pipe body (21), a recess is formed corresponding to the upper ring groove (14) to form an upper inner ring groove (21aa) that is in close contact with the upper sealing ring (21a) to form a watertight seal, and on the inner surface of the lower part, a recess is formed corresponding to the lower ring groove (15) to form a lower inner ring groove (21ba) that is in close contact with the lower sealing ring (21b) to form a watertight seal, and on the front center, a front through hole (22) is formed on the extension line of the front water passage hole (12), and on the rear center, a rear through hole (23) is formed on the extension line of the rear water passage hole (13), and on the left center, a left water passage hole (24) is formed, and on the right center, a right water passage hole (25) A through hole is formed, and a reference line (26) is formed that is vertically aligned from the center of the front through hole (22) to the upper and lower parts and is positioned at the arrow (31) indicating the upper end of the closed boundary line, so that it rotates in a watertight manner in the front and rear directions.
[0037] The upper fixing ring (30) is a ring body that is fixedly coupled by forming an inner screw portion (33) that is screw-coupled to the outer screw portion (11aa) of the upper part of the fire connection pipe (10) in a watertight manner, and an arrow (31) indicating a closing boundary line is formed on the outer surface of the front side of the lower part, and an arrow (32) indicating an opening boundary line is formed on the outer surface of the right side of the lower part, thereby blocking upward movement and guiding rotation when the watertight rotating moving pipe (20) rotates.
[0038] The lower fixing ring (40) is a ring body that is fixedly coupled by having an inner screw portion (41) formed therein that is screw-coupled to the outer screw portion (11ba) of the lower end of the fire connection pipe (10) in a watertight manner, and prevents downward movement and guides rotation when the watertight rotating moving pipe (20) rotates.
[0039] The above-mentioned front and rear water passage opening / closing ports (50, 50a) are each formed with a watertight plug (51) having a rubber plug (51a) that is watertight and has a length that extends to the front and rear water passage holes (12, 13) of the fire connection pipe (10), a metal support bar (51b) that is inserted into the center of the plug (51a), and a support plate (51c) that is a plate chain located on the outer surface of the support bar (51b) and extends to the left and right sides. A spring (52, 52a) is each formed that surrounds the outer surface of the watertight plug (51), is fixed in close contact with the outer surface of the watertight rotating pipe (20), and springs that spring outward are formed. The watertight plug (51) and the above-mentioned front and rear water passage opening / closing ports (50, 50a) are each formed in a cylindrical shape. A sliding water-opening / closing rod (53) is formed, each having a wrench bolt hole (53a) that encloses the spring (52, 52a) and has a headless wrench bolt (53b) screw-connected to the front and rear center side to push the support plate (51c) of the watertight plug (51) inward.
[0040] The above fire piping (60) is a pipe body installed in multiple locations in a building to supply fire extinguishing water so as to suppress a fire when a fire occurs. A sprinkler head (61) is mounted on the tip, but a cutting section (62) is formed that is cut off before reaching the sprinkler head (61). On one side of the cutting section (62), an outer threaded section (62a) is formed, and on the other side of the cutting section (62), an outer threaded section (62b) is formed.
[0041] The present invention allows for the convenient discharge of firefighting water remaining in the firefighting pipe (60) through simple operation by rotating the watertight rotating pipe (20), which opens the front and rear water passages (12, 13) of the firefighting connection pipe (10) by loosening the headless wrench bolt (53b) from the wrench bolt hole (53a) and rotates the watertight rotating pipe (20) to discharge the firefighting water inside the firefighting pipe (60), and then seals the front and rear water passages (12, 13) of the firefighting connection pipe (10) by tightening the headless wrench bolt (53b) from the wrench bolt hole (53a). Additionally, since there is no need for a separate bypass pipe to discharge firefighting water from thousands of sprinkler heads (61) installed in the building, a significant amount of time and cost can be saved during construction.
[0042] The embodiments and drawings attached to this specification merely clearly illustrate a part of the technical concept included in the present invention, and it is obvious that variations and specific embodiments that can be easily deduced by a person skilled in the art within the scope of the technical concept included in the specification and drawings of the present invention are all included within the scope of the technical concept of the present invention.
[0043] The scope of the present invention is defined by the claims set forth below rather than by the detailed description, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included within the scope of the present invention. Explanation of the symbols
[0044] 10: Firefighting connection pipe 11: Connection pipe body 11a: Upper inner threaded section 11aa: Upper outer threaded section 11b: Lower inner threaded section 11ba: Lower outer threaded section 12: Front water passage hole 13: Rear water passage hole 14: Upper ring groove 15: Lower ring groove 20: Watertight rotary moving pipe 21: Pipe body 21a: Upper sealing ring 21aa: Upper inner ring groove 21b: Lower sealing ring 21ba: Lower inner ring groove 22: Front through hole 23: Rear through hole 24: Left water passage hole 25: Right water passage hole 30: Upper fixing ring 31: Arrow indicating the closing boundary line 32: Arrow indicating the opening boundary line 33: Inner threaded section 40: Lower fixing ring 41: Inner threaded section 50, 50a: Front and rear water passage opening / closing ports 51: Watertight plug 51a : Plug 51b : Support bar 51c : Support plate 52 : Resilient spring 53 : Sliding water opening / closing rod 53a : Wrench bolt hole 53b : Headless wrench bolt 60 : Firefighting pipe 61 : Sprinkler head 62 : Cut section 62a : One-side outer threaded section 62b : Other-side outer threaded section
Claims
Claim 1 A fire piping (60) that is installed in multiple numbers in a building to supply fire extinguishing water to suppress a fire when a fire occurs, has a sprinkler head (61) mounted on its tip, but has a cutting section (62) that is cut off before reaching the sprinkler head (61), has a one-sided outer threaded section (62a) on one side of the cutting section (62), and has a other-sided outer threaded section (62b) on the other side of the cutting section (62), and a connecting pipe body (11) that is pipe-connected to the cutting section (62) and has an upper-side inner threaded section (11a) on one side to which the one-sided inner threaded section (62a) of the fire piping (60) is screw-connected, and has a lower-side inner threaded section (11b) on the other side to which the other-sided outer threaded section (62b) of the cutting section (62) is screw-connected, and is pipe-connected to the cutting section (62) to connect the fire piping (60). A firefighting connecting pipe (10) having an upper outer threaded portion (11aa) on the upper outer surface of the connecting pipe body (11), a lower outer threaded portion (11ba) on the lower outer surface of the connecting pipe body (11), a front water passage hole (12) in the front center of the connecting pipe body (11), and a rear water passage hole (13) in the rear center of the connecting pipe body (11); a watertight rotating moving pipe (20) having a pipe body (21) that is in close contact with the outer surface of the connecting pipe body (11) of the firefighting connecting pipe (10), having upper and lower sealing rings (21a, 21b) respectively, having a front through hole (22) on the extension line of the front water passage hole (12) in the front center, and a rear through hole (23) on the extension line of the rear water passage hole (13) in the rear center, and the watertight rotating moving pipe (20) In a rotary opening and closing device for a water pressure test of a fire piping having front and rear water-sealing openings (50, 50a) each having a water-sealing plug (51) that is inserted into and sealed in the front and rear openings (22, 23), the fire connecting pipe (10) has an upper ring groove (14) formed in a ring shape around the front and rear sides at the upper end of the lower connecting pipe body (11) of the upper outer screw portion (11aa), and a lower ring groove (15) formed in a ring shape around the front and rear sides at the lower end of the upper connecting pipe body (11) of the lower outer screw portion (11ba);The above watertight rotating moving pipe (20) has an upper inner ring groove (21aa) formed on the inner surface of the upper part of the pipe body (21) corresponding to the upper ring groove (14) so that the upper sealing ring (21a) is in close contact to form a watertight seal, and a lower inner ring groove (21ba) formed on the inner surface of the lower part corresponding to the lower ring groove (15) so that the lower sealing ring (21b) is in close contact to form a watertight seal, a left water passage hole (24) is formed in the center of the left side and a right water passage hole (25) is formed in the center of the right side, and a reference line (26) is formed vertically from the center of the front passage hole (22) to the upper side and is positioned at the arrow (31) indicating the closing boundary line, so that it rotates watertightly in the front and rear directions; and is screw-coupled watertightly to the outer screw portion (11aa) of the upper part of the fire connection pipe (10). An upper fixing ring (30) that is fixedly coupled with an inner screw portion (33), wherein an arrow (31) indicating a closing boundary line is formed on the outer surface of the lower front side and an arrow (32) indicating an opening boundary line is formed on the outer surface of the lower right side, thereby blocking and guiding upward movement of the watertight rotating moving pipe (20) during rotational movement; and a lower fixing ring (40) that is fixedly coupled with an inner screw portion (41) formed to be watertightly screw-coupled to the outer screw portion (11ba) of the lower part of the fire connection pipe (10), thereby blocking and guiding downward movement of the watertight rotating moving pipe (20) during rotational movement;The above-mentioned front and rear water passage opening / closing ports (50, 50a) each have a rubber stopper (51a) that is watertight and has a length that is inserted into the front and rear water passage holes (12, 13) of the fire connection pipe (10), and each have a metal support bar (51b) inserted into the center of the stopper (51a), and each have a support plate (51c) which is a plate chain that is positioned on the outer surface of the support bar (51b) and extends in length to the left and right sides, and each have a spring (52, 52a) that is positioned to surround the outer surface of the watertight stopper (51) and is fixed in close contact with the outer surface of the watertight rotating moving pipe (20) and springs that spring outward, and each have a cylindrical shape that surrounds the watertight stopper (51) and the spring (52, 52a), and a headless wrench bolt (53b) is screw-coupled to the front and rear center side. A rotary opening and closing device for a water pressure test of a fire piping system, characterized in that a sliding water-through opening and closing rod (53) having a wrench bolt hole (53a) that pushes the support plate (51c) of the watertight plug (51) inward is formed.