Pressure measuring connector of fire hydrant

Abstract

The utility model relates to the technical field of fire hydrant detection devices, in particular to a fire hydrant pressure measuring connector which comprises a connector body, a plurality of fastening assemblies and an integrated piece, one end of the connector body is connected with a fire hydrant connector in a clamped mode, and a water pressure gauge is fixedly installed at the other end of the connector body. The tightening assemblies are annularly arranged at the end, close to the fire hydrant connector, of the connector body, each tightening assembly comprises a lead screw and a moving part, the lead screws are rotationally installed on the connector body, one ends of the lead screws are in spiral transmission connection with the moving parts, and the integration parts are rotationally installed on the connector body. According to the utility model, through the arrangement of the integrated piece, each lead screw can rotate only by rotating the integrated piece, so that each lead screw can rotate, and the movable piece on each lead screw can abut against or be separated from the fire hydrant connector; the advantages that the number of screwing times is small, and the detection efficiency can be improved are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of fire hydrant detection devices, and more specifically to a fire hydrant pressure measuring joint. Background Art

[0002] Fire hydrants are fixed firefighting facilities, whose main function is to eliminate fire sources by spraying high-pressure water. In order to ensure that the water pressure sprayed by fire hydrants meets fire protection standards, building maintenance personnel need to regularly use detection devices to detect the water pressure of fire hydrants. Among them, the device for detecting the water pressure of fire hydrants includes the fire hydrant pressure measuring joint.

[0003] The patent document (CN217697746U) discloses a fire hydrant pressure measuring joint, including a joint body for being clamped with a fire hydrant joint, wherein one end of the joint body close to the fire hydrant joint is provided with a plurality of pressure blocks and a driving rod arranged in a ring, one end of the driving rod is threadedly connected to the joint body, and the other end of the driving rod is rotatably connected to the pressure block. When the joint body is clamped with the fire hydrant joint, by rotating each of the driving rods, the corresponding driving rod moves on the joint body and drives the pressure block to gradually approach the fire hydrant joint, and at a certain moment, the pressure block presses the fire hydrant joint, so that the connection between the fire hydrant joint and the joint body can be connected more tightly, reducing the risk of water leakage at the connection, so that the water pressure gauge at the other end of the joint body can have more accurate data when measuring pressure. However, since a plurality of driving rods are threadedly connected to the joint body, in order to make each pressure block abut against the fire hydrant joint, the inspection personnel need to screw the plurality of driving rods one by one, which is a cumbersome operation. When there are multiple fire hydrant joints in the same building that need to be pressure measured, the inspection efficiency is low.

[0004] Therefore, there is a need to provide a fire hydrant pressure measuring joint that has fewer screwing times and helps to improve detection efficiency. Utility Model Content

[0005] The main purpose of the present application is to provide a fire hydrant pressure measuring joint, which is arranged on a fire hydrant joint, wherein the fire hydrant pressure measuring joint includes a joint body, a plurality of tightening components and an integrated part, one end of the joint body is clamped and connected with the fire hydrant joint, and a water pressure gauge is fixedly installed on the other end of the joint body, the tightening component is annularly arranged on one end of the joint body close to the fire hydrant joint, each of the tightening components includes a screw rod and a moving part, the screw rod is rotatably installed on the joint body, and one end of the screw rod passes through the moving part. The part is spirally connected with the moving part, the integrating part is rotatably installed on the joint body, and the integrating part is dynamically connected with the screw rod on each of the tightening components. When the integrating part rotates, each of the screw rods rotates, and the moving part on each of the screw rods abuts against or separates from the fire hydrant joint. By setting the integrating part, the embodiment of the application only needs to rotate the integrating part to make each of the screw rods rotate. Compared with the prior art that requires rotating the drive rods one by one, the embodiment of the application has the advantages of less screwing times and helps to improve detection efficiency.

[0006] Another object of the present application is to provide a fire hydrant pressure measuring joint, wherein each of the tightening components includes a driven gear, and each of the ends of the screw rods facing away from the fire hydrant joint is fixedly mounted with a driven gear, and one end of the integration part has an active meshing portion, and the active meshing portion is meshed with each of the driven gears, so that each of the screw rods rotates when the integration part rotates through gear transmission.

[0007] Another object of the present application is to provide a fire hydrant pressure measuring joint, wherein each of the tightening components also includes a rotating part, one end of the rotating part is rotatably mounted on the first annular protrusion, and each of the movable parts has a plurality of guide grooves arranged in a ring shape. When the rotating part rotates by a predetermined angle, one end of the rotating part away from the first annular protrusion is placed in the guide groove or the rotating part is disengaged from the guide groove. By setting the rotating part, it is achieved to selectively provide a guide for the movable part.

[0008] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a fire hydrant pressure measuring joint, which is arranged on a fire hydrant joint, wherein the fire hydrant pressure measuring joint comprises:

[0009] a joint body, one end of which is clamped and connected to the fire hydrant joint, and the other end of which is fixedly mounted with a water pressure gauge; and

[0010] A plurality of tightening components, the tightening components are arranged in an annular manner on one end of the joint body close to the fire hydrant joint, each of the tightening components comprises a screw and a moving part, the screw is rotatably mounted on the joint body, and one end of the screw passes through the moving part and is spirally connected to the moving part; and

[0011] A unitary part, which is rotatably mounted on the joint body and is dynamically connected to the screw rods on each of the tightening components. When the unitary part rotates, each of the screw rods rotates, and the moving part on each of the screw rods abuts against or separates from the fire hydrant joint.

[0012] In one or more embodiments of the present application, each of the tightening components includes a driven gear, and each end of the screw rod facing away from the fire hydrant joint is fixedly mounted with a driven gear, and one end of the integration part has an active meshing portion, and the active meshing portion is meshed with each of the driven gears.

[0013] In one or more embodiments of the present application, the end of the integration component away from the active gear portion has a plurality of screw grooves arranged in a ring shape.

[0014] In one or more embodiments of the present application, the fire hydrant pressure measuring joint also includes a plurality of first bearings, the inner ring of each of the first bearings is sleeved on the joint body, the integrated part has a plurality of bearing grooves, each of the bearing grooves is provided with a first bearing, and the outer ring of the first bearing is interference fit with the corresponding bearing groove.

[0015] In one or more embodiments of the present application, the fire hydrant pressure measuring joint also includes two limit rings, the two limit rings are sleeved on the joint body and fixedly connected to the joint body, and the two limit rings are located at both ends of the integrated part, and each of the limit rings is abutted against the inner ring of the corresponding first bearing.

[0016] In one or more embodiments of the present application, the joint body has a first annular protrusion at one end close to the fire hydrant joint, and each of the screw rods is rotatably mounted on the first annular protrusion, and the first annular protrusion is located between the driven gear and the moving part.

[0017] In one or more embodiments of the present application, each of the tightening components also includes a rotating member, one end of which is rotatably mounted on the first annular protrusion, and each of the movable members has a plurality of guide grooves arranged in a ring shape. When the rotating member rotates by a predetermined angle, one end of the rotating member facing away from the first annular protrusion is placed in the guide groove or the rotating member is disengaged from the guide groove.

[0018] In one or more embodiments of the present application, each of the tightening components further includes a torsion spring, and two ends of the torsion spring are respectively connected to the rotating member and the first annular protrusion.

[0019] In one or more embodiments of the present application, the end of the joint body close to the fire hydrant joint also has a second annular protrusion, the second annular protrusion is located at the end of the first annular protrusion away from the integrating part, and each of the screw rods passes through the second annular protrusion.

[0020] In an embodiment of the present application, a fire hydrant pressure measuring joint includes a joint body, a plurality of tightening components and an integrated part. One end of the joint body is clamped with the fire hydrant joint, and a water pressure gauge is fixedly installed on the other end. The tightening components are arranged in a ring at one end of the joint body close to the fire hydrant joint. Each tightening component includes a screw and a moving part. The screw is rotatably installed on the joint body, and one end of the screw is spirally connected to the moving part. The integrated part is rotatably installed on the joint body, and the integrated part is dynamically connected to the screw on each tightening component. When the integrated part rotates, each screw rotates, and the moving part on each screw abuts against or separates from the fire hydrant joint. By setting the integrated part, the embodiment of the present application only needs to rotate the integrated part to make each screw rotate. Compared with the prior art that requires rotating the drive rod one by one, the embodiment of the present application has the advantages of less screwing times and helps to improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0022] Figure 1 The figure shows a half-section view of a fire hydrant pressure measuring joint of the utility model;

[0023] Figure 2 The diagram shows the structural diagram of the fire hydrant joint from a certain perspective;

[0024] Figure 3 The figure shows a schematic diagram of the structure of the moving parts. DETAILED DESCRIPTION

[0025] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0026] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0027] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0028] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0029] Application Overview

[0030] There is an existing fire hydrant pressure measuring joint. Since a plurality of driving rods are threadedly connected to the joint body, in order to make each pressure block abut against the fire hydrant joint, the inspection personnel need to screw the plurality of driving rods one by one, which is a cumbersome operation. When there are multiple fire hydrant joints in the same building that need to be pressure measured, the inspection efficiency is low.

[0031] Based on the above technical problems, the present application proposes a fire hydrant pressure measuring joint, wherein the fire hydrant pressure measuring joint has a simple structure, does not involve complicated manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the fire hydrant pressure measuring joint provided by the present application is easy to produce and low-cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0032] Schematic fire hydrant pressure test joint,

[0033] refer to Figures 1 to 3 According to a preferred embodiment of the utility model, a fire hydrant pressure measuring joint is arranged on a fire hydrant joint 10. The fire hydrant pressure measuring joint includes a joint body 20. One end of the joint body 20 is clamped and connected to the fire hydrant joint 10, and the other end of the joint body 20 is fixedly installed with a water pressure gauge 30.

[0034] Specifically, in order to realize the clamping connection between the joint body 20 and the fire hydrant joint 10, as shown in FIG. Figure 1 As shown, one end of the fire hydrant joint 10 has a first flange portion 101, the maximum radial dimension of the first flange portion 101 is greater than the maximum radial dimension of the other end of the fire hydrant joint 10, and the first flange portion 101 has a clamping cavity 1011, referring to Figure 2 The opening of the clamping cavity 1011 has two symmetrically arranged semicircular blocking parts 1012, and a circular through opening 1013 and two horizontal through openings 1014 are provided between the two semicircular blocking parts 1012. The two horizontal through openings 1014 are located on both sides of the circular through opening 1013 and are connected to the circular through opening 1013. In addition, Figure 1 As shown, the joint body 20 has a second flange portion 201 at one end close to the fire hydrant joint 10, and the end of the second flange portion 201 also has a cylindrical protrusion 2011, and the side of the cylindrical protrusion 2011 has two symmetrically arranged protrusions 2012. It should be noted that when the joint body 20 is engaged with the fire hydrant joint 10, the cylindrical protrusion 2011 is opposite to the circular through-hole 1013, and the two protrusions 2012 are opposite to the two horizontal through-holes 1014, so that the cylindrical protrusion 2011 extends from the circular through-hole 1013 into the engaging cavity 1011, and the joint body 20 is rotated by a predetermined angle, so that the two protrusions 2012 respectively abut against the corresponding semicircular blocking portion 1012 and prevent the joint body 20 from being separated from the engaging cavity 1011; it should also be noted that when the cylindrical protrusion 2011 extends into the engaging cavity 1011, the wall surface of the protrusion 2012 fits with the cavity surface of the engaging cavity 1011, and the first flange portion 101 fits with the second flange portion 201; in addition, in order to improve the sealing performance, as Figure 1 As shown, each of the protrusions 2012 is provided with a sealing gasket 40 on one side away from the fire hydrant joint 10 and the second flange portion 201, and the sealing gasket 40 is fixedly mounted on the joint body 20 by screw connection; in addition, as shown Figure 1 and Figure 2As shown, the fire hydrant joint 10 has a drainage hole 102 connected to the clamping cavity 1011, and the joint body 20 has a blind hole 2013. The blind hole 2013 extends a predetermined distance from the cylindrical protrusion 2011 in the direction away from the fire hydrant joint 10. When the joint body 20 is clamped with the fire hydrant joint 10, the drainage hole 102 is connected to the blind hole 2013, and water is discharged from the drainage hole 102 and flows into the blind hole 2013. It should also be pointed out that the sensitive element of the water pressure gauge 30 extends into the end of the blind hole 2013 away from the fire hydrant joint 10. When the blind hole 2013 is filled with water, the water gives the sensitive element of the water pressure gauge 30 a pressure and causes it to deform elastically, and causes the pointer on the water pressure gauge 30 to move and display the pressure value. Since the water pressure gauge 30 is a mature technology and is widely used in the market, the specific structure and model of the water pressure gauge 30 will not be described here. The water pressure gauge 30 includes but is not limited to the water pressure gauge 30 disclosed in the patent document (CN209623947U) that can detect pipeline water pressure.

[0035] It should be noted that when measuring the water pressure of a fire hydrant, due to the excessively high pressure, if the sealing gasket 40 between the first flange portion 101 and the second flange portion 201 is not compressed, there is a risk of water leakage, which affects the water pressure detection data of the fire hydrant.

[0036] In view of this, in the embodiment of the present application, in order to make the first flange portion 101 and the second flange portion 201 fit more closely and compress the sealing gasket 40, as shown in FIG. Figure 1 As shown, the fire hydrant pressure measuring joint also includes a plurality of tightening components 50, and the tightening components 50 are arranged in a ring at one end of the joint body 20 close to the fire hydrant joint 10, and each of the tightening components 50 includes a threaded rod 501 and a moving part 502, and the threaded rod 501 is rotatably mounted on the joint body 20, and one end of the threaded rod 501 passes through the moving part 502 and is spirally connected to the moving part 502.

[0037] It should be noted that, by rotating the screw rod 501, the moving part 502 moves along the screw rod 501 and approaches or moves away from the fire hydrant joint 10. When the fire hydrant joint 10 is engaged with the joint body 20, by rotating each of the screw rods 501 and making each corresponding moving part 502 press the fire hydrant joint 10, the joint body 20 and the fire hydrant joint 10 can be more closely fitted, and the sealing gasket 40 can be compressed.

[0038] However, since there are a large number of screw rods 501, if the screw rods 501 are rotated one by one, the operation is cumbersome, which affects the detection efficiency. Figure 1 As shown, the fire hydrant pressure measuring joint also includes a unified part 60, which is rotatably mounted on the joint body 20, and the unified part 60 is dynamically connected to the screw rod 501 on each of the tightening components 50. When the unified part 60 rotates, each of the screw rods 501 rotates, and the moving part 502 on each of the screw rods 501 abuts against or separates from the fire hydrant joint 10.

[0039] Furthermore, when the integration part 60 rotates, each of the screw rods 501 rotates accordingly. Figure 1 As shown, each of the tightening components 50 includes a driven gear 5011, and one end of each of the screw rods 501 away from the fire hydrant joint 10 is fixedly installed with a driven gear 5011 by welding or key connection. One end of the integration part 60 has an active meshing portion 601, and the active meshing portion 601 includes a plurality of meshing teeth arranged in a ring shape, and the active meshing portion 601 is meshed with each of the driven gears 5011.

[0040] It should be noted that when the integrated part 60 rotates, the teeth on the active meshing part 601 drive each of the driven gears 5011 to rotate. Since each of the driven gears 5011 is fixedly connected to the corresponding screw rod 501, each of the screw rods 501 rotates in a circumferential direction. It is obvious that, compared with the prior art in which each driving rod needs to be screwed one by one, the embodiment of the present application only needs to rotate one integrated part 60 to drive each of the screw rods 501 to rotate. Compared with the prior art, the embodiment of the present application has the advantages of less screwing times and helps to improve the detection efficiency.

[0041] Furthermore, in order to facilitate the inspection personnel to rotate the integration member 60, as shown in FIG. Figure 1 As shown, the end of the integration part 60 away from the active meshing part 601 has a plurality of screw grooves 602 arranged in a ring shape, and a cross-sectional shape of the screw grooves 602 is preferably square or regular hexagonal.

[0042] It should be noted that by providing a plurality of the screw grooves 602 arranged in a ring shape, when the integrated part 60 needs to be rotated, the inspector can insert an insert rod or an Allen wrench into the screw groove 602, and swing the insert rod or the Allen wrench to drive the integrated part 60 to rotate circumferentially.

[0043] Furthermore, in order to realize the rotatable installation of the integration member 60 on the joint body 20, as shown in FIG. Figure 1As shown, the fire hydrant pressure measuring joint also includes a plurality of first bearings 70. In the embodiment of the present application, the number of the first bearings 70 is two, and the two first bearings 70 are arranged at intervals, and the inner ring of each first bearing 70 is sleeved on the joint body 20. The integrated part 60 has a plurality of bearing grooves 603. In the embodiment of the present application, both end faces of the integrated part 60 have a bearing groove 603, and each bearing groove 603 is provided with a first bearing 70, and the outer ring of the first bearing 70 is interference fit with the corresponding bearing groove 603.

[0044] It should be noted that when the outer ring of the first bearing 70 rotates relative to the inner ring of the first bearing 70, the integration part 60 which is interference fit with the outer ring of the first bearing 70 rotates circumferentially to achieve the purpose of rotatably installing the integration part 60 on the joint body 20.

[0045] Furthermore, in order to prevent the inner ring of the first bearing 70 from axially moving along the joint body 20 and causing the active meshing portion 601 to be unable to effectively mesh with each of the driven gears 5011, as shown in FIG. Figure 1 As shown, the fire hydrant pressure measuring joint further includes two limiting rings 701, which are sleeved on the joint body 20 and fixedly connected to the joint body 20, and the fixed connection method includes but is not limited to welding or threaded connection, and the two limiting rings 701 are located at both ends of the integration part 60, and each limiting ring 701 abuts against the inner ring of the corresponding first bearing 70. It should be noted that by arranging the limiting rings 701 on the outer sides of the two first bearings 70, the first bearing 70 is limited from axial movement.

[0046] Furthermore, in order to realize that each of the screw rods 501 is rotatably mounted on the joint body 20, as shown in FIG. Figure 1 As shown, the joint body 20 has a first annular protrusion 202 at one end close to the fire hydrant joint 10, and each of the screw rods 501 is rotatably mounted on the first annular protrusion 202 through a bearing. The first annular protrusion 202 is located between the driven gear 5011 and the moving part 502, and in the embodiment of the present application, the first annular protrusion 202 is located on the second flange portion 201.

[0047] Furthermore, in order to realize the rotation of the screw rod 501, the corresponding moving member 502 only moves axially along the screw rod 501, such as Figure 1As shown, each of the tightening components 50 further includes a rotating member 503, one end of which is rotatably mounted on the first annular protrusion 202 through a pin, and each of the moving members 502 has a plurality of guide grooves 5021 arranged in an annular shape. In the embodiment of the present application, referring to Figure 3 Each of the movable members 502 is provided with one end of the screw rod 501 having three guide grooves 5021 arranged in an annular shape. When the rotating member 503 rotates by a predetermined angle, the end of the rotating member 503 away from the first annular protrusion 202 is placed in the guide groove 5021 or the rotating member 503 is separated from the guide groove 5021.

[0048] It should be noted that, under normal circumstances, one end of the rotating member 503 away from the first annular protrusion 202 is placed in the guide groove 5021, and a guiding effect is provided for the rotating member 503; however, when the joint body 20 is engaged with the fire hydrant joint 10, in order to avoid the movement interference between the moving member 502 and the first flange portion 101 of the fire hydrant joint 10, the inspection personnel first rotate the rotating member 503 and make the rotating member 503 fall off the corresponding guide groove 5021. At this time, the inspection personnel can rotate the moving member 502 90°. At this time, since the width dimension of the moving member 502 is smaller than its length dimension, the side surface of the rotating member 502 after rotation will be spaced a predetermined distance from the outer surface of the first flange portion 101, thereby avoiding the movement interference between the moving member 502 and the first flange portion 101 during the engagement between the joint body 20 and the fire hydrant joint 10. dynamic interference; in addition, in order to facilitate the fixing of the angle of the movable member 502 after rotating a predetermined angle, the three guide grooves 5021 arranged in an annular manner are provided. After the movable member 502 rotates 90°, the inspection personnel can place the rotating member 503 in another rotating guide groove 5021 to temporarily fix the angle of the movable member 502; when the joint body 20 is engaged with the fire hydrant joint 10, the rotating member 503 is disengaged from the guide groove 5021, and one end face of the movable member 502 is made parallel to the end face of the first flange portion 101, and the rotating member 503 is placed in the guide groove 5021 again to guide the movable member 502, so that when the inspection personnel rotate the integrated member 60, each movable member 502 moves along the corresponding screw rod 501 and at a certain moment, the movable member 502 presses the first flange portion 101.

[0049] Furthermore, in order to realize that the rotating member 503 is normally placed in the corresponding guide groove 5021, as shown in FIG. Figure 1As shown, each of the tightening components 50 further includes a torsion spring 504, and two ends of the torsion spring 504 are respectively connected to the rotating member 503 and the first annular protrusion 202, and the connection method is preferably welding.

[0050] Furthermore, since the moving member 502 is far away from the first annular protrusion 202, in order to improve the rigidity of each of the screw rods 501, as shown in FIG. Figure 1 As shown, the end of the joint body 20 close to the fire hydrant joint 10 also has a second annular protrusion 203, and the second annular protrusion 203 is located at the end of the first annular protrusion 202 away from the integration part 60, and each of the screw rods 501 passes through the second annular protrusion 203. By setting the second annular protrusion 203, an auxiliary support is provided for each of the screw rods 501.

[0051] In summary, the fire hydrant pressure measuring joint based on the embodiment of the present application is explained, which provides the fire hydrant pressure measuring joint with advantages such as fewer screwing times and helps to improve detection efficiency.

[0052] It is worth mentioning that in the embodiment of the present application, the fire hydrant pressure measuring joint has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the fire hydrant pressure measuring joint provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0053] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A fire hydrant pressure measuring joint, which is provided on the fire hydrant joint. Features: The fire hydrant pressure measuring joint comprises a joint body, one end of which is clamped and connected to the fire hydrant joint, and the other end of which is fixedly mounted with a water pressure gauge; and A plurality of tightening components, the tightening components are arranged in an annular manner on one end of the joint body close to the fire hydrant joint, each of the tightening components comprises a screw, a moving part and a driven gear, the screw is rotatably mounted on the joint body, one end of the screw passes through the moving part and is spirally connected to the moving part, and one end of each screw away from the fire hydrant joint is fixedly mounted with a driven gear; as well as A unitary part, which is rotatably mounted on the joint body and is dynamically connected to the screw rod on each of the tightening components. One end of the unitary part has an active meshing portion, which meshes with each of the driven gears. When the unitary part rotates, each of the screw rods rotates, and the moving part on each of the screw rods abuts against or separates from the fire hydrant joint.

2. The fire hydrant pressure measuring joint according to claim 1, Features: The end of the integration part away from the active toothing part has a plurality of screw grooves arranged in an annular shape.

3. The fire hydrant pressure measuring joint according to claim 2, Features: The fire hydrant pressure measuring joint also includes a plurality of first bearings, the inner ring of each of the first bearings is sleeved on the joint body, the integrated part has a plurality of bearing grooves, each of the bearing grooves is provided with a first bearing, and the outer ring of the first bearing is interference fit with the corresponding bearing groove.

4. The fire hydrant pressure measuring joint according to claim 3, Features: The fire hydrant pressure measuring joint also includes two limit rings, which are sleeved on the joint body and fixedly connected to the joint body, and the two limit rings are located at both ends of the integrated part, and each of the limit rings abuts against the inner ring of the corresponding first bearing.

5. The fire hydrant pressure measuring joint according to any one of claims 2 to 4, Features: One end of the joint body close to the fire hydrant joint is provided with a first annular protrusion, and each of the screw rods is rotatably mounted on the first annular protrusion, and the first annular protrusion is located between the driven gear and the moving part.

6. The fire hydrant pressure measuring joint according to claim 5, Features: Each of the tightening components also includes a rotating member, one end of which is rotatably mounted on the first annular protrusion, and each of the movable members has a plurality of guide grooves arranged in a ring shape. When the rotating member rotates by a predetermined angle, one end of the rotating member that is away from the first annular protrusion is placed in the guide groove or the rotating member is disengaged from the guide groove.

7. The fire hydrant pressure measuring joint according to claim 6, Features: Each of the tightening components further includes a torsion spring, and two ends of the torsion spring are respectively connected to the rotating member and the first annular protrusion.

8. The fire hydrant pressure measuring joint according to claim 7, Features: The joint body also has a second annular protrusion at one end close to the fire hydrant joint. The second annular protrusion is located at the end of the first annular protrusion away from the integration part, and each of the screw rods passes through the second annular protrusion.

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