A pressure resistance test device for an indoor fire hydrant

Abstract

The present invention relates to the technical field of fire hydrant detection, and specifically discloses a pressure resistance testing device for indoor fire hydrants, comprising: a test water gun head and a pressure gauge, the pressure gauge being arranged at the top end of the outer wall of the test water gun head; a globe valve arranged on the right side of the test water gun head; an overpressure protection mechanism arranged on the left side of the outer wall of the test water gun head; and an aperture adjustment mechanism arranged at the right end of the test water gun head. This device improves the accuracy and reliability of fire hydrant pressure testing, ensures compatible testing of fire hydrants with different diameters, effectively protects the testing equipment and the sealing of the 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.

Description

Technical Field

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

[0002] Fire hydrants, as indispensable fire-fighting facilities in modern buildings, bear the heavy responsibility of quickly providing a large amount of water source in the initial stage of a fire to extinguish the fire. Their design aims to release the water flow in the water supply system to the fire scene with a certain pressure and flow rate through the built-in valve and nozzle (usually called the gun head), providing an effective fire-fighting means for firefighters. To ensure that the fire hydrant can work properly in an emergency, it is particularly important to conduct regular pressure tests on it;

[0003] The pressure resistance test of indoor fire hydrants is mainly divided into two types: static pressure test and dynamic pressure test. The static pressure test aims to detect the pressure stability of the fire hydrant when there is no water flow, ensuring that the water pressure in the system is maintained within the specified range to prevent poor water supply or equipment damage caused by insufficient or excessive pressure. The dynamic pressure test is to simulate the actual use scenario and test the pressure performance of the fire hydrant when spraying water flow to verify its effectiveness in the actual fire-fighting process;

[0004] When conducting these tests, the traditional method is to connect a fire hydrant test joint to the fire hydrant gun head and measure its pressure value through the test joint. However, there are some obvious defects in the design and use of the existing fire hydrant test joints;

[0005] Specifically, the existing fire hydrant test joints 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 test joints unable to cope when facing fire hydrants of different calibers. Once the caliber of the test joint does not match the caliber of the gun head of the fire hydrant to be tested, it will cause changes in the pressure distribution during the water spray process, thereby affecting the accuracy of the dynamic pressure test. This mismatch may lead to a significant difference between the dynamic pressure of the fire hydrant tested by the test joint and the dynamic pressure when spraying with the actual gun head, thus misleading the performance evaluation of the fire hydrant and even potentially affecting the fire-fighting effect at a critical moment and increasing fire losses;

[0006] In addition, traditional fire hydrant test connectors also lack overpressure protection devices. In a fire protection system, pump failures, pressure stabilizing device failures, or pressure reducing valve failures often occur. These can all lead to abnormal increases in the water pressure of the fire hydrant. Without an effective overpressure protection device, excessive water pressure may not only damage the test connector itself but also cause damage to the seal at the fire hydrant interface. Once the seal is deformed, damaged, or fails, water leakage will occur, which not only affects the normal use of the fire hydrant but also may cause waste of water resources and safety hazards. In extreme cases, seal failure may even trigger more serious fire accidents, posing a threat to the safety of personnel and property. Summary of the Invention

[0007] The purpose of the present invention is to provide a pressure resistance testing device for an indoor fire hydrant to solve the problems in the prior art of being unable to adjust the caliber of the gun head and lacking an overpressure protection device.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A pressure resistance testing device for an indoor fire hydrant includes: a test water gun head and a pressure gauge. The pressure gauge is arranged at the top end of the outer wall of the test water gun head; a ball valve is arranged on the right side of the test water gun head; an overpressure protection mechanism is arranged on the left side of the outer wall of the test water gun head; and a hole diameter adjusting mechanism is arranged at the right end of the test water gun head.

[0009] Preferably, the overpressure protection mechanism includes: a pressure relief pipe arranged on the left side of the top end of the outer wall of the test water gun head; the bottom end of a 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; a plug is slidably and adaptively sleeved on the top end of the pressure relief pipe and slidably sleeved on the outer wall of the guide rod; a first spring is sleeved on the top of the outer wall of the guide rod, and the bottom end of the first spring is clamped to the top end of the plug.

[0010] Preferably, in order to adjust the maximum pressure value that can be borne, the overpressure protection mechanism further includes: a bracket arranged on the left side of the top end of the outer wall of the test water gun head, and the pressure relief pipe is located in the inner cavity of the bracket; a screw rod is screwed to the middle of the top end of the bracket, the bottom end of the screw rod extends into the inner cavity of the bracket, and the top end of the outer wall of the guide rod is slidably and adaptively inserted into the inner cavity of the screw rod; an extrusion seat is rotatably arranged at the bottom end of the screw rod through a bearing, the inner cavity of the extrusion seat is communicated with the inner cavity of the screw rod, the guide rod is slidably and adaptively inserted into the inner cavity of the extrusion seat, and the top end of the first spring is clamped to the bottom end of the extrusion seat.

[0011] Preferably, in order to adjust the aperture of the test water gun head, the aperture adjusting mechanism includes: a positioning disk disposed at the right end of the test water gun head. The inner cavity of the positioning disk communicates with the inner cavity of the test water gun head. A plurality of card slots are equidistantly arranged along the circumferential direction on the outer wall of the positioning disk, and six limiting slots are equidistantly arranged along the circumferential direction on the right side of the positioning disk; a slider is slidably and adaptively inserted into the middle of the inner cavity of the limiting slot; the number of sealing plates is six, and the middle parts of the left outer ends of the six sealing plates are respectively arranged on the right sides of the six sliders, and the six sealing plates are matched with each other.

[0012] Preferably, in order to drive the movement of the sealing plate, the aperture adjusting mechanism further includes: a sliding column disposed at the middle part of the right outer end of the sealing plate; a rotating disk is rotatably sleeved on the outer wall of the positioning disk through a bearing. The positioning disk is located in the inner cavity of the rotating disk. Six driving slots penetrating through from left to right are equidistantly arranged along the circumferential direction on the right side of the rotating disk. The sliding column is slidably and adaptively inserted into the inner side of the driving slot, and a plurality of extrusion slots are equidistantly arranged along the circumferential direction on the inner wall of the rotating disk.

[0013] Preferably, in order to fix the rotating disk, the following is arranged in the inner cavity of the extrusion slot: a second spring, the second spring is embedded in the inner cavity of the extrusion slot, and one end of the second spring is clamped to the inner wall of the extrusion slot; a part of the clamping ball is embedded in the inner cavity of the extrusion slot, and the other part of the clamping ball extends into the inner cavity of the card slot corresponding to its position in an adaptive manner, and the other end of the second spring is clamped to the outer wall of the clamping ball.

[0014] Preferably, the length of the clamping ball extending into the inner cavity of the card slot is less than its radius.

[0015] Preferably, the distance from the top end of the guide rod to the top end of the inner cavity of the screw rod is greater than the distance from the bottom end of the extrusion seat to the top end of the plug.

[0016] A pressure resistance testing device for an indoor fire hydrant proposed by the present invention has the beneficial effects as follows:

[0017] 1. The present invention can install the test water gun head at the interface of the fire hydrant, and by opening or closing the ball valve, the static pressure and dynamic pressure of the fire hydrant can be measured respectively, and the pressure value can be read through the pressure gauge.

[0018] 2. By rotating the screw rod, the present invention drives the extrusion seat to move up and down through the screw rod, so as to adjust the extrusion degree of the first spring, and further adjust the maximum water pressure that the test water gun head can withstand. When the water pressure value in the inner cavity of the test water gun head exceeds the maximum water pressure it can withstand, under the action of the pressure, the plug can be pushed to move up and down along the outer wall of the guide rod, and the first spring is squeezed to generate elastic deformation, so as to promote the water in the inner cavity of the test water gun head to flow out through the pressure relief pipe, reduce the pressure in the inner cavity of the test water gun head, and prevent the sealing of the test water gun head or the interface of the fire hydrant from being damaged.

[0019] 3. By rotating the turntable, the driving groove can be used to drive the sliding column to drive the sealing plate to move. At the same time, the cooperation between the limiting groove and the slider can limit the sealing plate, so that the gap inside the six sealing plates can be adjusted, and indirectly the caliber of the test water gun head can be adjusted, thus ensuring the compatibility test of fire hydrants with different calibers.

[0020] 4. This device improves the accuracy and reliability of the fire hydrant pressure test, ensures the compatibility test of fire hydrants with different calibers, effectively protects the test equipment and the sealing of the fire hydrant interface, reduces the risk 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

[0021] Figure 1 is a schematic structural view of the present invention;

[0022] Figure 2 is an exploded view of the present invention;

[0023] Figure 3 is an exploded view of the overpressure protection mechanism;

[0024] Figure 4 is a schematic structural view of the extrusion seat;

[0025] Figure 5 is an exploded view of the aperture adjusting mechanism;

[0026] Figure 6 is a schematic structural view of the slider;

[0027] Figure 7 is Figure 6 an enlarged view of part A of

[0028] In the figure: 1, test water 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 adjusting mechanism; 51, positioning disk; 52, card slot; 53, limiting groove; 54, slider; 55, sealing plate; 56, sliding column; 57, turntable; 58, driving groove; 59, extrusion groove; 510, second spring; 511, clamping ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 - 7 The present invention provides a technical solution for a pressure resistance test device of an indoor fire hydrant, including: a test water gun head 1, a pressure gauge 2, a ball valve 3, an overpressure protection mechanism 4, and an aperture adjustment mechanism 5. The pressure gauge 2 is arranged at the top end of the outer wall of the test water gun head 1. The pressure gauge 2 is a prior art and will not be elaborated here. The pressure gauge 2 is used to read the pressure in the inner cavity of the test water gun head 1. The ball valve 3 is arranged on the right side of the test water gun head 1. The ball valve 3 is a prior art and will not be elaborated here. The ball valve 3 is used to control the opening and closing of the inner cavity of the test water gun head 1. The overpressure protection mechanism 4 is arranged on the left side of the outer wall of the test water gun head 1. The overpressure protection mechanism 4 is used to prevent the pressure in the inner cavity of the test water gun head 1 from being too large and causing damage to the test water gun head 1 or the sealing of the fire hydrant interface. The aperture adjustment mechanism 5 is arranged at the right end of the test water gun head 1. The aperture adjustment mechanism 5 is used to indirectly adjust the aperture of the test water gun head 1.

[0031] As a preferred solution, 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 a pressing seat 47. The pressure relief pipe 41 is arranged on the left side of the top end of the outer wall of the test water gun head 1. The pressure relief pipe 41 is used to release the water pressure in the inner cavity of the test water gun head 1. 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. The guide rod 42 is used to limit the plug 43 and the first spring 44. The plug 43 is slidably and adaptively sleeved on the top end of the pressure relief pipe 41 and 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, and the bottom end of the first spring 44 is clamped on the top end of the plug 43. The first spring 44 is a torsion spring, which undergoes elastic deformation when subjected to external extrusion or stretching and returns to its initial state after the external force is removed. The first spring 44 is used to apply a downward extrusion force to the plug 43 here. The bracket 45 is arranged on the left side of the top end of the outer wall of the test water 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 on the middle of the top end of the bracket 45, and the bottom end of the screw 46 extends into the inner cavity of the bracket 45. The top end of the outer wall of the guide rod 42 is slidably and adaptively inserted into the inner cavity of the screw 46. The screw 46 is used to extrude the first spring 44. The pressing seat 47 is rotatably arranged at the bottom end of the screw 46 through a bearing. The inner cavity of the pressing seat 47 is communicated with the inner cavity of the screw 46. The guide rod 42 is slidably and adaptively inserted into the inner cavity of the pressing seat 47. The top end of the first spring 44 is clamped on the bottom end of the pressing seat 47. The pressing 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 46 is greater than the distance from the bottom end of the pressing seat 47 to the top end of the plug 43, ensuring that the extrusion degree of the first spring 44 can be increased.

[0032] As a preferred solution, further, the aperture adjusting mechanism 5 includes: a positioning disk 51, a card slot 52, a limiting slot 53, a slider 54, a sealing plate 55, a sliding column 56, a turntable 57, a driving slot 58, a pressing slot 59, a second spring 510 and a clamping ball 511. The positioning disk 51 is arranged at the right end of the test water gun head 1, and the inner cavity of the positioning disk 51 is communicated with the inner cavity of the test water gun head 1. A plurality of card slots 52 are equidistantly arranged along the circumference on the outer wall of the positioning disk 51. Six limiting slots 53 are equidistantly arranged along the circumference on the right side of the positioning disk 51. The slider 54 is slidably and adaptively inserted into the middle of the inner cavity of the limiting slot 53. The cooperation between the slider 54 and the limiting slot 53 can be used to limit the sealing plate 55. The number of the sealing plates 55 is six. The middle parts of the left outer ends of the six sealing plates 55 are respectively arranged on the right sides of the six sliders 54. The six sealing plates 55 match each other. The sealing plate 55 is used to block the inner cavity of the test water gun head 1. The sliding column 56 is arranged at the middle part of the right outer end of the sealing plate 55. The cooperation between the sliding column 56 and the driving slot 58 can be used to promote the movement of the sealing plate 55. The turntable 57 is rotatably sleeved on the outer wall of the positioning disk 51 through a bearing. The positioning disk 51 is located in the inner cavity of the turntable 57. Six driving slots 58 penetrating left and right are equidistantly arranged along the circumference on the right side of the turntable 57. The sliding column 56 is slidably and adaptively inserted into the inner side of the inner cavity of the driving slot 58. A plurality of pressing slots 59 are equidistantly arranged along the circumference on the inner wall of the turntable 57. The second spring 510 is embedded in the inner cavity of the pressing slot 59. One end of the second spring 510 is clamped to the inner wall of the pressing slot 59. The second spring 510 is a rotary spring. It undergoes elastic deformation after being externally pressed or stretched and returns to its initial state after the external force is removed. The second spring 510 is used here to push the clamping ball 511 into the inner cavity of the card slot 52. A part of the clamping ball 511 is embedded in the inner cavity of the pressing slot 59, and the other part of the clamping ball 511 extends into the inner cavity of the card slot 52 corresponding to its position adaptively. The other end of the second spring 510 is clamped to the outer wall of the clamping ball 511. The cooperation between the clamping ball 511 and the card slot 52 can be used to fix the position of the turntable 57. The length of the clamping ball 511 extending into the inner cavity of the card slot 52 is less than its radius, ensuring that the turntable 57 can rotate.

[0033] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0034] During use, rotate the screw rod 46 according to the maximum water pressure that the test water gun head 1 can withstand. The rotational force generated by the rotation of the screw rod 46 can cause the screw rod 46 to drive the extrusion seat 47 to move up and down, thereby adjusting the extrusion degree of the first spring 44. Furthermore, the maximum water pressure that the test water gun head 1 can withstand can be adjusted by adjusting the extrusion force exerted by the first spring 44 on the plug 43. Rotate the turntable 57 according to the caliber of the fire hose nozzle adapted to the current fire hydrant to be tested. The rotation of the turntable 57 can drive the drive groove 58 to rotate. At the same time, the rotation of the turntable 57 can drive the clamping ball 511 to move circumferentially. Furthermore, the inner wall of the clamping groove 52 can be used to squeeze the clamping ball 511 into the inner cavity of the extrusion groove 59 and squeeze the second spring 510 to undergo elastic deformation until the clamping ball 511 moves out of the inner cavity of the clamping groove 52. The rotation of the drive groove 58 can drive the sealing plate 55 to slide by means of the sliding column 56. At the same time, the cooperation between the limiting groove 53 and the slider 54 can be used to limit the sealing plate 55, thereby adjusting the gap inside the six sealing plates 55, and indirectly adjusting the caliber of the test water gun head 1 until the turntable 57 rotates to an appropriate position. At this time, under the elastic force of the second spring 510, the clamping ball 511 can be pushed into the inner cavity of the current corresponding clamping groove 52. The cooperation between the clamping groove 52 and the clamping ball 511 can be used to fix the position of the turntable 57. Install the test water gun head 1 on the fire hydrant, use the spherical valve 3 to block the inner cavity of the test water gun head 1, rotate and open the fire hydrant, and the fire hydrant delivers water into the inner cavity of the test water gun head 1. At this time, since the spherical valve 3 blocks the inner cavity of the test water gun head 1, the pressure in the inner cavity of the test water gun head 1 gradually increases. After the pressure in the inner cavity of the test water gun head 1 stabilizes, the static water pressure of the test water gun head 1 can be read through the pressure gauge 2. If the static water pressure in the inner cavity of the test water gun head 1 is too high, under the action of the water pressure, the plug 43 can be pushed to move upward along the guide rod 42 and squeeze the first spring 44 to undergo elastic deformation until the plug 43 is separated from the pressure relief pipe 41. The water in the inner cavity of the test water gun head 1 can be discharged through the pressure relief pipe 41, thereby releasing the pressure in the inner cavity of the test water gun head 1 and preventing damage to the sealing of the test water gun head 1 and the fire hydrant interface. Rotate the spherical valve 3 to release the blockage of the inner cavity of the test water gun head 1 by the spherical valve 3. The water delivered by the fire hydrant is ejected through the test water gun head 1. At this time, the dynamic water pressure of the fire hydrant can be read through the pressure gauge 2. After the test is completed, close the fire hydrant and remove the test water gun head 1 from the fire hydrant.

[0035] In summary, the device improves the accuracy and reliability of fire hydrant pressure testing, ensures compatible testing of fire hydrants with different calibers, effectively protects the testing equipment and the sealing of the 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.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure resistance test device for an indoor fire hydrant, characterized in that Including: Testing water gun head (1); Pressure gauge (2), the pressure gauge (2) is arranged at the top end of the outer wall of the testing water gun head (1); Ball valve (3), the ball valve (3) is arranged on the right side of the testing water gun head (1); Overpressure protection mechanism (4), the overpressure protection mechanism (4) is arranged on the left side of the outer wall of the testing water gun head (1); Aperture adjustment mechanism (5), the aperture adjustment mechanism (5) is arranged at the right end of the testing water gun head (1); The overpressure protection mechanism (4) includes: Relief pipe (41), the relief pipe (41) is arranged on the left side of the top end of the outer wall of the testing water gun head (1); Guide rod (42), the bottom end of the guide rod (42) is arranged in the inner cavity of the relief pipe (41), and the top end of the guide rod (42) extends out of the top end of the relief pipe (41); Plug (43), the plug (43) is slidably and adaptively sleeved on the top end of the relief pipe (41), and the plug (43) is slidably sleeved on the outer wall of the guide rod (42); First spring (44), 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); The aperture adjustment mechanism (5) includes: Positioning disk (51), the positioning disk (51) is arranged at the right end of the testing water gun head (1), the inner cavity of the positioning disk (51) is communicated with the inner cavity of the testing water gun head (1), a plurality of card slots (52) are equidistantly arranged along the circumference on the outer wall of the positioning disk (51), and six limiting slots (53) are equidistantly arranged along the circumference on the right side of the positioning disk (51); Slider (54), the slider (54) is slidably and adaptively inserted into the middle of the inner cavity of the limiting slot (53); Sealing plates (55), the number of the sealing plates (55) is six, the middle parts of the left outer ends of the six sealing plates (55) are respectively arranged on the right sides of the six sliders (54), and the six sealing plates (55) are matched; Sliding column (56), the sliding column (56) is arranged at the middle part of the right outer end of the sealing plate (55); Rotating disk (57), the rotating disk (57) is rotatably sleeved on the outer wall of the positioning disk (51) through a bearing, the positioning disk (51) is located in the inner cavity of the rotating disk (57), six driving slots (58) penetrating left and right are equidistantly arranged along the circumference on the right side of the rotating disk (57), the sliding column (56) is slidably and adaptively inserted into the inner side of the driving slot (58), and a plurality of extrusion slots (59) are equidistantly arranged along the circumference on the inner wall of the rotating disk (57); In the inner cavity of the extrusion slot (59) there is: Second spring (510), the second spring (510) is embedded in the inner cavity of the extrusion slot (59), and one end of the second spring (510) is clamped on the inner wall of the extrusion slot (59); Ball (511), a part of the ball (511) is embedded in the inner cavity of the extrusion slot (59), another part of the ball (511) extends into the inner cavity of the card slot (52) corresponding to its position adaptively, and the other end of the second spring (510) is clamped on the outer wall of the ball (511).

2. The pressure resistance test device for an indoor fire hydrant according to claim 1, characterized in that: The overpressure protection mechanism (4) further includes: Bracket (45), the bracket (45) is arranged on the left side of the outer wall top of the test water gun head (1), and the pressure relief pipe (41) is located in the inner cavity of the bracket (45); Screw rod (46), the screw rod (46) is screwed to the middle of the top of the bracket (45), the bottom end of the screw rod (46) extends into the inner cavity of the bracket (45), and the top end of the outer wall of the guide rod (42) is slidably and adaptively inserted into the inner cavity of the screw rod (46); Extrusion seat (47), the extrusion seat (47) is rotatably arranged at the bottom end of the screw rod (46) through a bearing, the inner cavity of the extrusion seat (47) is communicated with the inner cavity of the screw rod (46), the guide rod (42) is slidably and adaptively 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 an indoor fire hydrant according to claim 1, characterized in that: The length of the clamping ball (511) extending into the inner cavity of the clamping groove (52) is less than its radius.

4. A pressure resistance test device for an indoor fire hydrant according to claim 2, 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).

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