Pressure resistance testing device for indoor fire hydrant

Abstract

The invention relates to the technical field of fire hydrant detection, and particularly discloses an indoor fire hydrant pressure resistance testing device which comprises a water test gun head and a pressure gauge arranged at the top end of the outer wall of the water test gun head. The spherical valve is arranged on the right side of the water test gun head; the overpressure protection mechanism is arranged on the left side of the outer wall of the water test gun head; the aperture adjusting mechanism is arranged at the right end of the water testing gun head. According to the device, the accuracy and reliability of fire hydrant pressure testing are improved, compatible testing of fire hydrants with different calibers is ensured, meanwhile, sealing of testing equipment and a fire hydrant connector is effectively protected, risks caused by abnormal water pressure are reduced, and a safer and more efficient solution is provided for regular maintenance and performance evaluation of fire-fighting equipment.

Description

Technical Field

[0001] The invention relates to the technical field of fire hydrant detection, in particular to a pressure resistance testing device for indoor fire hydrants. Background Art

[0002] Fire hydrants, as an indispensable fire-fighting facility in modern buildings, are responsible for quickly providing a large amount of water to extinguish the fire in the early stage of the fire. They are designed to release the water flow in the water supply system to the fire scene at a certain pressure and flow rate through the built-in valves and nozzles (usually called gun heads), providing firefighters with effective fire-fighting means. In order to ensure that fire hydrants can work normally in an emergency, it is particularly important to conduct regular pressure tests on them. The pressure resistance test of indoor fire hydrants is mainly divided into static pressure test and dynamic pressure test. The static pressure test is to detect the pressure stability of the fire hydrant when there is no water flow, to ensure that the water pressure in the system is maintained within the specified range, to prevent water supply problems or equipment damage caused by insufficient or excessive pressure, while the dynamic pressure test is to test the pressure performance of the fire hydrant when spraying water by simulating actual use scenarios, to verify its effectiveness in the actual fire extinguishing process; When conducting these tests, the traditional method is to use a fire hydrant water test joint connected to the fire hydrant gun head and measure the pressure value through the water test joint. However, the existing fire hydrant water test joint has some obvious defects in design and use; Specifically, the existing fire hydrant water test joint cannot adjust the caliber of the gun head. Since different models of fire hydrants may be equipped with gun heads of different calibers, this fixed caliber design makes the water test joint appear powerless when facing fire hydrants of different calibers. Once the caliber of the water test joint does not match the caliber of the gun head of the fire hydrant to be tested, the pressure distribution of the water flow during the injection process will change, thereby affecting the accuracy of the dynamic pressure test. This mismatch may cause the dynamic pressure of the fire hydrant tested by the water test joint to be significantly different from the dynamic pressure when the gun head is actually used for injection, thereby misleading the performance evaluation of the fire hydrant, and may even affect the fire extinguishing effect at a critical moment, increasing fire losses; In addition, traditional fire hydrant water test joints lack over-pressure protection devices. In fire protection systems, water pump failure, pressure stabilizing device failure or pressure reducing valve failure often occur, which may cause the water pressure of the fire hydrant to increase abnormally. If there is no effective over-pressure protection device, excessive water pressure may not only damage the water test joint itself, but also damage the seal at the fire hydrant interface. Once the seal is deformed, damaged or fails, it will cause water leakage, which will not only affect the normal use of the fire hydrant, but also cause waste of water resources and safety hazards. In extreme cases, seal failure may even cause more serious fire accidents, posing a threat to the safety of people and property. Summary of the invention

[0003] The purpose of the present invention is to provide a pressure resistance testing device for indoor fire hydrants to solve the problems in the prior art that the caliber of the gun head cannot be adjusted and there is a lack of an overpressure protection device.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a pressure resistance testing device for an indoor fire hydrant, comprising: a water test gun head and a pressure gauge, the pressure gauge being arranged at the top of the outer wall of the water test gun head; a ball valve being arranged at the right side of the water test gun head; an overpressure protection mechanism being arranged at the left side of the outer wall of the water test gun head; and an aperture adjustment mechanism being arranged at the right end of the water test gun head.

[0005] Preferably, the overpressure protection mechanism includes: a pressure relief pipe, which is arranged on the left side of the top end of the outer wall of the water testing gun head; the bottom end of the guide rod is arranged in the inner cavity of the pressure relief pipe, and the top end of the guide rod extends out of the top end of the pressure relief pipe; the plug is slidably and adaptively connected to the top end of the pressure relief pipe, and the plug is slidably connected to the outer wall of the guide rod; the first spring is connected to the top of the outer wall of the guide rod, and the bottom end of the first spring is clamped on the top end of the plug.

[0006] Preferably, in order to adjust the maximum tolerable pressure value, the overpressure protection mechanism also includes: a bracket, the bracket is arranged on the left side of the top end of the outer wall of the water testing gun head, and the pressure relief pipe is located in the inner cavity of the bracket; the screw is screwed to the middle of the top end of the bracket, and the bottom end of the screw extends into the inner cavity of the bracket, and the top end of the outer wall of the guide rod can be slidably adapted and inserted in the inner cavity of the screw; the extrusion seat is rotatably arranged at the bottom end of the screw through a bearing, the inner cavity of the extrusion seat is connected to the inner cavity of the screw, the guide rod can be slidably adapted and inserted in the inner cavity of the extrusion seat, and the top end of the first spring is clamped at the bottom end of the extrusion seat.

[0007] Preferably, in order to adjust the caliber of the water testing gun head, the aperture adjustment mechanism includes: a positioning plate, the positioning plate is arranged at the right end of the water testing gun head, the inner cavity of the positioning plate is connected to the inner cavity of the water testing gun head, the outer wall of the positioning plate is provided with a plurality of slots equidistantly along the circumference, and the right side of the positioning plate is provided with six limit slots equidistantly along the circumference; the slider can be slidably adapted and inserted in the middle of the inner cavity of the limit slot; the number of sealing plates is six, and the middle of the left outer ends of the six sealing plates are respectively arranged on the right side of the six sliders, and the six sealing plates match each other.

[0008] Preferably, in order to drive the sealing plate to move, the aperture adjustment mechanism also includes: a sliding column, which is arranged in the middle of the right outer end of the sealing plate; the turntable is rotatably connected to the outer wall of the positioning plate through a bearing, and the positioning plate is located in the inner cavity of the turntable. The right side of the turntable is provided with six driving grooves that penetrate the left and right at equal distances along the circumference, and the sliding column can be slidably adapted and inserted into the inner side of the inner cavity of the driving groove, and the inner wall of the turntable is provided with a plurality of extrusion grooves at equal distances along the circumference.

[0009] Preferably, in order to fix the turntable, the inner cavity of the extrusion groove is provided with: a second spring, the second spring is embedded in the inner cavity of the extrusion groove, and one end of the second spring is clamped to the inner wall of the extrusion groove; a part of the clamping ball is embedded in the inner cavity of the extrusion groove, and the other part of the clamping ball is adapted to extend into the inner cavity of the clamping groove corresponding to its position, and the other end of the second spring is clamped to the outer wall of the clamping ball.

[0010] Preferably, the length of the card ball extending into the inner cavity of the card slot is smaller than its radius.

[0011] Preferably, the distance from the top end of the guide rod to the top end of the screw cavity is greater than the distance from the bottom end of the extrusion seat to the top end of the plug.

[0012] The pressure resistance testing device for indoor fire hydrants proposed by the present invention has the following beneficial effects: 1. The present invention can install the water test gun head at the interface of the fire hydrant, and can measure the static pressure and dynamic pressure of the fire hydrant respectively by opening or closing the ball valve, and read the pressure value through the pressure gauge.

[0013] 2. The present invention rotates the screw rod, and then utilizes the screw rod to drive the extrusion seat to move up and down, thereby adjusting the extrusion degree of the first spring, and then adjusting the maximum water pressure that the water test gun head can withstand. When the water pressure value in the inner cavity of the water test gun head exceeds the maximum water pressure it can withstand, the plug can be pushed up and down along the outer wall of the guide rod under the action of pressure, and the first spring is squeezed to undergo elastic deformation, thereby prompting the water in the inner cavity of the water test gun head to flow out through the pressure relief pipe, reducing the pressure in the inner cavity of the water test gun head, and preventing the interface seal of the water test gun head or the fire hydrant from being damaged.

[0014] 3. The present invention can drive the sliding column to move the sealing plate through the driving groove by rotating the turntable. At the same time, the sealing plate can be limited by the cooperation between the limiting groove and the sliding block, so that the gap between the inner sides of the six sealing plates can be adjusted, and then the caliber of the water test gun head can be indirectly adjusted, thereby ensuring the compatibility test of fire hydrants of different calibers.

[0015] 4. This device improves the accuracy and reliability of fire hydrant pressure testing, ensures the compatibility of fire hydrants of different calibers, and effectively protects the seal of the test equipment and fire hydrant interface, reduces the risks caused by abnormal water pressure, and provides a safer and more efficient solution for the regular maintenance and performance evaluation of fire protection facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 An exploded view of the present invention; Figure 3 This is an exploded diagram of the overpressure protection mechanism; Figure 4It is a structural schematic diagram of the extrusion seat; Figure 5 It is an exploded diagram of the aperture adjustment mechanism; Figure 6 It is a structural schematic diagram of the slider; Figure 7 for Figure 6 Enlarged view of point A.

[0017] In the figure: 1. water test gun head; 2. pressure gauge; 3. ball valve; 4. overpressure protection mechanism; 41. pressure relief pipe; 42. guide rod; 43. plug; 44. first spring; 45. bracket; 46. screw; 47. extrusion seat; 5. aperture adjustment mechanism; 51. positioning plate; 52. card slot; 53. limit slot; 54. slider; 55. sealing plate; 56. slide column; 57. turntable; 58. drive slot; 59. extrusion slot; 510. second spring; 511. card ball. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 7 The present invention provides a technical solution for a pressure test device for an indoor fire hydrant, comprising: a water test gun head 1, a pressure gauge 2, a ball valve 3, an overpressure protection mechanism 4 and an aperture adjustment mechanism 5, wherein the pressure gauge 2 is arranged at the top of the outer wall of the water test gun head 1, the pressure gauge 2 is a prior art and will not be described in detail herein, the pressure gauge 2 is used herein to read the pressure in the inner cavity of the water test gun head 1, the ball valve 3 is arranged on the right side of the water test gun head 1, the ball valve 3 is a prior art and will not be described in detail herein, the ball valve 3 is used herein to control the opening and closing of the inner cavity of the water test gun head 1, the overpressure protection mechanism 4 is arranged on the left side of the outer wall of the water test gun head 1, the overpressure protection mechanism 4 is used to prevent the pressure in the inner cavity of the water test gun head 1 from being too high, thereby causing damage to the seal of the water test gun head 1 or the fire hydrant interface, and the aperture adjustment mechanism 5 is arranged at the right end of the water test gun head 1, and the aperture adjustment mechanism 5 is used to indirectly adjust the caliber of the water test gun head 1.

[0020] As a preferred embodiment, further, the overpressure protection mechanism 4 includes: a pressure relief pipe 41, a guide rod 42, a plug 43, a first spring 44, a bracket 45, a screw 46 and an extrusion seat 47, the pressure relief pipe 41 is arranged on the left side of the top end of the outer wall of the water test gun head 1, the pressure relief pipe 41 is used to release the water pressure in the inner cavity of the water test gun head 1, the bottom end of the guide rod 42 is arranged in the inner cavity of the pressure relief pipe 41, the top end of the guide rod 42 extends out of the top end of the pressure relief pipe 41, and the guide rod 42 is used to close the plug 43 and The first spring 44 is used for limiting, the plug 43 can be slidably matched with the top of the pressure relief pipe 41, the plug 43 can be slidably sleeved on the outer wall of the guide rod 42, the plug 43 is used to block the inner cavity of the pressure relief pipe 41, the first spring 44 is sleeved on the top of the outer wall of the guide rod 42, the bottom end of the first spring 44 is clamped on the top of the plug 43, the first spring 44 is a rotation spring, which is elastically deformed by external force, and returns to its initial state after the external force is removed. 44 is used to apply downward extrusion force to the plug 43, the bracket 45 is arranged on the left side of the top of the outer wall of the water testing gun head 1, the pressure relief pipe 41 is located in the inner cavity of the bracket 45, the bracket 45 is used to support the screw 46, the screw 46 is screwed to the middle of the top of the bracket 45, the bottom end of the screw 46 extends into the inner cavity of the bracket 45, the top of the outer wall of the guide rod 42 can be slidably adapted to be inserted into the inner cavity of the screw 46, the screw 46 is used to squeeze the first spring 44, and the squeezing seat 47 is connected through the bearing It is rotatably arranged at the bottom end of the screw rod 46, the inner cavity of the extrusion seat 47 is connected to the inner cavity of the screw rod 46, the guide rod 42 is slidably adapted to be inserted into the inner cavity of the extrusion seat 47, the top end of the first spring 44 is clamped at the bottom end of the extrusion seat 47, the extrusion seat 47 can be used to block the first spring 44, the distance from the top end of the guide rod 42 to the top end of the inner cavity of the screw rod 46 is greater than the distance from the bottom end of the extrusion seat 47 to the top end of the plug 43, thereby ensuring that the extrusion degree of the first spring 44 can be increased.

[0021] As a preferred embodiment, further, the aperture adjustment mechanism 5 includes: a positioning plate 51, a slot 52, a limit slot 53, a slider 54, a sealing plate 55, a slide column 56, a turntable 57, a drive slot 58, an extrusion slot 59, a second spring 510 and a card ball 511. The positioning plate 51 is arranged at the right end of the water test gun head 1, and the inner cavity of the positioning plate 51 is connected to the inner cavity of the water test gun head 1. The outer wall of the positioning plate 51 is provided with a plurality of slots 52 equidistantly along the circumferential direction, and the right side of the positioning plate 51 is provided with six limit slots 53 equidistantly along the circumferential direction. The slider 54 can slide The sealing plate 55 is adapted to be inserted in the middle of the inner cavity of the limiting groove 53, and the cooperation between the slider 54 and the limiting groove 53 can be used to limit the sealing plate 55. There are six sealing plates 55, and the middle of the left outer ends of the six sealing plates 55 are respectively arranged on the right side of the six sliders 54. The six sealing plates 55 match each other, and the sealing plate 55 is used to block the inner cavity of the water testing gun head 1. The sliding column 56 is arranged in the middle of the right outer end of the sealing plate 55. The cooperation between the sliding column 56 and the driving groove 58 can cause the sealing plate 55 to move. The turntable 57 is rotatably sleeved through the bearing The outer wall of the positioning plate 51 is located in the inner cavity of the rotating plate 57. Six driving grooves 58 are opened on the right side of the rotating plate 57 at equal intervals along the circumference, and the sliding column 56 can be slidably adapted and inserted into the inner side of the inner cavity of the driving groove 58. The inner wall of the rotating plate 57 is opened at equal intervals along the circumference. A second spring 510 is embedded in the inner cavity of the extrusion groove 59. One end of the second spring 510 is clamped on the inner wall of the extrusion groove 59. The second spring 510 is a rotating spring. After being squeezed or stretched by an external force, it undergoes elastic deformation. After the external force is removed, Restore to the initial state, the second spring 510 is used to push the card ball 511 into the inner cavity of the card slot 52, a part of the card ball 511 is embedded in the inner cavity of the extrusion groove 59, and the other part of the card ball 511 is adapted to extend into the inner cavity of the card slot 52 corresponding to its position, and the other end of the second spring 510 is connected to the outer wall of the card ball 511. The position of the turntable 57 can be fixed by the cooperation between the card ball 511 and the card slot 52. The length of the card ball 511 extending into the inner cavity of the card slot 52 is less than its radius, so as to ensure that the turntable 57 can rotate.

[0022] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0023] When in use, the screw 46 is rotated according to the maximum water pressure that the water test gun head 1 can withstand. The rotational force generated by the rotation of the screw 46 can cause the screw 46 to drive the extrusion seat 47 to move up and down, so that the extrusion degree of the first spring 44 can be adjusted, and then the maximum water pressure that the water test gun head 1 can withstand can be adjusted by adjusting the extrusion force applied by the first spring 44 to the plug 43. The turntable 57 is rotated according to the caliber of the fire gun head adapted to the fire hydrant to be tested. The rotation of the turntable 57 can drive the driving slot 58 to rotate. At the same time, the rotation of the turntable 57 can drive the card ball 511 to move along the circumferential direction, and then the card slot 52 is used to adjust the pressure of the plug 43. The inner wall can squeeze the card ball 511 to move into the inner cavity of the extrusion groove 59, and squeeze the second spring 510 to elastically deform until the card ball 511 moves out of the inner cavity of the card groove 52. The rotation of the driving groove 58 can use the sliding column 56 to drive the sealing plate 55 to slide. At the same time, the cooperation between the limiting groove 53 and the sliding block 54 can be used to limit the sealing plate 55, so that the gap between the six inner sides of the sealing plate 55 can be adjusted, and then the caliber of the water testing gun head 1 is indirectly adjusted until the turntable 57 rotates to a suitable position. At this time, the elastic force of the second spring 510 can push the card ball 511 to move into the current position corresponding to it. In the inner cavity of the corresponding card slot 52, the position of the turntable 57 can be fixed by utilizing the cooperation between the card slot 52 and the card ball 511, the water test gun head 1 is installed on the fire hydrant, the inner cavity of the water test gun head 1 is blocked by the ball valve 3, the fire hydrant is rotated to open, and the fire hydrant delivers water to the inner cavity of the water test gun head 1. At this time, since the ball valve 3 blocks the inner cavity of the water test gun head 1, the pressure in the inner cavity of the water test gun head 1 gradually increases. After the pressure in the inner cavity of the water test gun head 1 stabilizes, the static water pressure of the water test gun head 1 can be read by the pressure gauge 2. If the static water pressure in the inner cavity of the water test gun head 1 is too high, the water pressure will The plug 43 can be pushed to move upward along the guide rod 42, and the first spring 44 can be squeezed to undergo elastic deformation until the plug 43 and the pressure relief pipe 41 are separated, and the water in the inner cavity of the water test gun head 1 can be discharged through the pressure relief pipe 41, thereby releasing the pressure in the inner cavity of the water test gun head 1, thereby preventing damage to the seal of the water test gun head 1 and the fire hydrant interface. The ball valve 3 is rotated to release the blockage of the inner cavity of the water test gun head 1 by the ball valve 3, and the water delivered by the fire hydrant is ejected through the water test gun head 1. At this time, the dynamic water pressure of the fire hydrant can be read by the pressure gauge 2. After the test is completed, the fire hydrant is closed and the water test gun head 1 can be removed from the fire hydrant.

[0024] In summary, this device improves the accuracy and reliability of fire hydrant pressure testing, ensures compatible testing of fire hydrants of different calibers, and effectively protects the seal of the test equipment and fire hydrant interface, reduces the risks caused by abnormal water pressure, and provides a safer and more efficient solution for the regular maintenance and performance evaluation of fire protection facilities.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure test device for indoor fire hydrants, characterized in that: include: Water test gun head (1); A pressure gauge (2), the pressure gauge (2) being arranged at the top end of the outer wall of the water testing gun head (1); A spherical valve (3), wherein the spherical valve (3) is arranged on the right side of the water testing gun head (1); An overpressure protection mechanism (4), the overpressure protection mechanism (4) being arranged on the left side of the outer wall of the water testing gun head (1); An aperture adjustment mechanism (5), wherein the aperture adjustment mechanism (5) is arranged at the right end of the water testing gun head (1); The overvoltage protection mechanism (4) comprises: A pressure relief pipe (41), wherein the pressure relief pipe (41) is arranged on the left side of the top end of the outer wall of the water testing gun head (1); A guide rod (42), wherein the bottom end of the guide rod (42) is arranged in the inner cavity of the pressure relief pipe (41), and the top end of the guide rod (42) extends out of the top end of the pressure relief pipe (41); A plug (43), the plug (43) being slidably adapted to be fitted on the top end of the pressure relief pipe (41), and the plug (43) being slidably sleeved on the outer wall of the guide rod (42); A first spring (44), wherein the first spring (44) is sleeved on the top of the outer wall of the guide rod (42), and the bottom end of the first spring (44) is clamped on the top end of the plug (43).

2. The pressure resistance test device for indoor fire hydrants according to claim 1, characterized in that: The overvoltage protection mechanism (4) further comprises: A bracket (45), the bracket (45) being arranged on the left side of the top end of the outer wall of the water testing gun head (1), and the pressure relief pipe (41) being located in the inner cavity of the bracket (45); A screw rod (46), the screw rod (46) being screwed to the middle of the top end of the bracket (45), the bottom end of the screw rod (46) extending into the inner cavity of the bracket (45), and the top end of the outer wall of the guide rod (42) being slidably adapted to be inserted into the inner cavity of the screw rod (46); An extrusion seat (47) is rotatably arranged at the bottom end of the screw rod (46) via a bearing, the inner cavity of the extrusion seat (47) is connected to the inner cavity of the screw rod (46), the guide rod (42) is slidably adapted to be inserted into the inner cavity of the extrusion seat (47), and the top end of the first spring (44) is clamped to the bottom end of the extrusion seat (47).

3. The pressure resistance test device for indoor fire hydrants according to claim 2, characterized in that: The aperture adjustment mechanism (5) comprises: A positioning plate (51), the positioning plate (51) being arranged at the right end of the water testing gun head (1), the inner cavity of the positioning plate (51) being connected to the inner cavity of the water testing gun head (1), the outer wall of the positioning plate (51) being provided with a plurality of slots (52) equidistantly arranged along the circumferential direction, and the right side of the positioning plate (51) being provided with six limiting slots (53) equidistantly arranged along the circumferential direction; A slider (54), the slider (54) being slidably adapted to be inserted into the middle portion of the inner cavity of the limiting groove (53); The sealing plates (55) are six in number, and the middle parts of the left outer ends of the six sealing plates (55) are respectively arranged on the right sides of the six sliding blocks (54), and the six sealing plates (55) match each other.

4. The pressure resistance test device for indoor fire hydrants according to claim 3, characterized in that: The aperture adjustment mechanism (5) further comprises: A sliding column (56), wherein the sliding column (56) is arranged at the middle portion of the right outer end of the sealing plate (55); The turntable (57) is rotatably sleeved on the outer wall of the positioning plate (51) through a bearing, the positioning plate (51) is located in the inner cavity of the turntable (57), six driving grooves (58) penetrating the right side of the turntable (57) are equidistantly provided along the circumferential direction, the sliding column (56) is slidably adapted to be inserted into the inner side of the inner cavity of the driving groove (58), and a plurality of extrusion grooves (59) are equidistantly provided on the inner wall of the turntable (57) along the circumferential direction.

5. The pressure resistance test device for indoor fire hydrants according to claim 4, characterized in that: The inner cavity of the extrusion groove (59) is provided with: a second spring (510), the second spring (510) being embedded in the inner cavity of the extrusion groove (59), and one end of the second spring (510) being clamped on the inner wall of the extrusion groove (59); A locking ball (511), a portion of which is embedded in the inner cavity of the extrusion groove (59), and another portion of which is adapted to extend into the inner cavity of the locking groove (52) corresponding to its position, and the other end of the second spring (510) is locked to the outer wall of the locking ball (511).

6. The pressure resistance test device for indoor fire hydrants according to claim 5, characterized in that: The length of the locking ball (511) extending into the inner cavity of the locking groove (52) is less than its radius.

7. The pressure resistance test device for indoor fire hydrants according to claim 6, characterized in that: The distance from the top end of the guide rod (42) to the top end of the inner cavity of the screw rod (46) is greater than the distance from the bottom end of the extrusion seat (47) to the top end of the plug (43).

Images