Metal hose air tightness detection mechanism

Abstract

The utility model discloses a metal hose air tightness detection mechanism which comprises a flange fixedly communicated with the output end of a detection box, the flange is in threaded connection with a locking sleeve, a rubber sleeve is arranged in the locking sleeve in a sliding mode, and a cavity is annularly formed in the side wall of the rubber sleeve. The compression spring is arranged between the annular cavity and the vertical rod of the sliding rod, the side wall of the rubber sleeve is attached to the side wall of the annular cavity, a conical groove is formed in the end, away from the flange, of the locking sleeve, and a cavity is formed in the side wall of the rubber sleeve. The flange pushes the inflating assembly to inflate the cavity, the rubber sleeve is blown to bulge to annularly extrude the surface of the metal hose, gas in the cavity is pumped out by the inflating assembly after detection is completed, the rubber sleeve gradually becomes flat, extrusion on the metal hose is removed, the metal hose is conveniently taken out, and meanwhile the integrity of the rubber sleeve is protected. The air leakage phenomenon is reduced, and the detection accuracy of the metal hose is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of fire protection, in particular to an air tightness detection mechanism for a metal hose. Background technology:

[0002] After five years of use, the gas fire extinguishing system should be tested for air tightness by professional maintenance personnel every three years. The metal hose of the gas fire extinguishing system should be tested using a test box. When the metal hose needs to be tested, first put the locking sleeve and the rubber sleeve on the metal hose in sequence, then rotate the locking sleeve to fix the locking sleeve to the flange, and the locking sleeve drives the rubber sleeve to be inserted into the flange, and then operate the test box to test the metal hose.

[0003] The existing rubber sleeve is a solid structure. The locking sleeve drives the rubber sleeve to be inserted into the flange. The flange annularly squeezes the rubber sleeve to ensure the sealing between the rubber sleeve and the metal hose. When the metal hose needs to be pulled out after the inspection is completed, the deformed rubber sleeve squeezes the metal hose, which makes it inconvenient to pull out the metal hose. If you are not careful, the rubber sleeve may be easily damaged, resulting in air leakage, which reduces the detection accuracy of the metal hose. Utility model content:

[0004] To this end, the purpose of the utility model is to provide a metal hose air tightness detection mechanism to overcome the existing technology because the existing rubber sleeve is a solid structure, the locking sleeve drives the rubber sleeve to be inserted into the flange, and the flange annularly squeezes the rubber sleeve to ensure the sealing between the rubber sleeve and the metal hose. When the metal hose needs to be pulled out after the inspection is completed, the deformed rubber sleeve squeezes the metal hose and it is not convenient to pull out the metal hose. If you are not careful, the rubber sleeve may be easily damaged, resulting in air leakage, thereby reducing the detection accuracy of the metal hose.

[0005] The utility model is implemented by the following technical solutions:

[0006] A metal hose air tightness detection mechanism comprises a flange fixedly connected to the output end of a detection box, a locking sleeve being threadedly connected to the flange, a rubber sleeve being slidably provided inside the locking sleeve, a cavity being annularly opened on the side wall of the rubber sleeve, an air pumping assembly being fixedly connected inside the locking sleeve, the output end of the air pumping assembly being inserted into the cavity and connected thereto, and the air pumping assembly can perform air-inflating and air-deflating operations on the cavity.

[0007] Preferably, the inflation assembly includes an annular cavity fixedly arranged in the locking sleeve, the annular cavity and the locking sleeve forming a storage cavity, a rubber ring is slidably fitted in the storage cavity, the rubber ring is slidably fitted on the surface of the locking sleeve, a ventilation tube is fixedly provided through the side wall of the rubber ring, one end of the ventilation tube is communicated with the storage cavity, the other end of the ventilation tube is inserted into the cavity and communicated with it, a plurality of sliding rods are annularly fixedly connected to the side wall of the rubber ring, one end of the sliding rod passes through the locking sleeve and fits with the flange surface, the sliding rod is slidably connected to the locking sleeve, a compression spring is sleeved on the sliding rod, the compression spring is arranged between the annular cavity and the vertical rod of the sliding rod, and the side wall of the rubber sleeve fits with the side wall of the annular cavity.

[0008] Preferably, the inner diameter of the vent pipe gradually decreases along the direction approaching the rubber sleeve.

[0009] Preferably, the surface where the sliding rod contacts the flange surface is a curved surface.

[0010] Preferably, the side wall of the annular cavity is provided with two dovetail grooves with different diameters, a matching ring is slidably arranged in the dovetail groove, the side wall of the ring is fixedly connected to the side wall of the rubber sleeve, and the output end of the cavity is arranged between the two rings.

[0011] Preferably, a tapered groove is formed at the end of the locking sleeve away from the flange, and the diameter of the tapered groove gradually increases in a direction away from the flange.

[0012] The advantages of the utility model are as follows: a cavity is opened on the side wall of the rubber sleeve, and the locking sleeve drives the rubber sleeve to move and insert into the flange. The flange pushes the inflation component to inflate the cavity to blow up the rubber sleeve and perform annular extrusion on the surface of the metal hose. After the detection is completed, the gas in the cavity is extracted by the inflation component, and the rubber sleeve gradually flattens to cancel the extrusion of the metal hose, which facilitates the removal of the metal hose while protecting the integrity of the rubber sleeve, reduces the occurrence of air leakage, and improves the detection accuracy of the metal hose. Description of the drawings:

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is the structural diagram of the utility model;

[0015] Figure 2 This is the front view of the structure of the utility model;

[0016] Figure 3 It is a three-dimensional diagram of the structure of the utility model;

[0017] Figure 4 This is a structural diagram of the structural part 5 described in the utility model.

[0018] In the figure: flange 1, locking sleeve 2, annular cavity 3, circular ring 4, rubber sleeve 5, cavity 6, dovetail groove 7, storage cavity 8, rubber ring 9, vent pipe 10, slide rod 11, compression spring 12, tapered groove 13, metal hose 14. Specific implementation method:

[0019] In order to make the purpose and advantages of the utility model more clearly understood, the utility model is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0021] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0022] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] like Figure 1-Figure 4 As shown, the utility model provides the following technical solutions: a metal hose air tightness detection mechanism, including a flange 1 fixedly connected to the output end of the detection box, a locking sleeve 2 threadedly connected to the flange 1, a rubber sleeve 5 slidingly provided in the locking sleeve 2, a cavity 6 annularly opened on the side wall of the rubber sleeve 5, an air pumping assembly fixedly connected in the locking sleeve 2, the output end of the air pumping assembly is inserted into the cavity 6 and connected thereto, and the air pumping assembly can perform air-inflating and air-evacuation operations on the cavity 6.

[0024] Combination Figure 1 As shown, during use, when the metal hose 14 needs to be tested for sealing, first, the locking sleeve 2 and the rubber sleeve 5 are sequentially put on the metal hose 14. At this time, the output end of the inflation component is inserted into the cavity 6 and connected with it, and then the metal hose 14 is inserted into the flange 1. The metal hose 14 drives the rubber sleeve 5 to be inserted into the flange 1. The metal hose 14 drives the locking sleeve 2 to move, and the locking sleeve 2 drives the inflation component to move and fit the side wall of the flange 1. Then the locking sleeve 2 is rotated and screwed to the flange 1, and the locking sleeve 2 drives the inflation component to move. At this time, the flange 1 pushes the inflation component to work, and the inflation component inflates the cavity 6 so that the rubber sleeve 5 bulges and squeezes the surrounding wall of the metal hose 14, thereby achieving sealing of the surrounding wall of the metal hose 14, and the side wall of the rubber sleeve 5 fits with the inflation component to ensure the sealing between the rubber sleeve 5 and the inflation component.

[0025] After the locking sleeve 2 is fixed to the flange 1, the detection box is operated to detect the air tightness of the metal hose 14. After the metal hose 14 is tested, first unscrew the locking sleeve 2 to separate it from the flange 1. The locking sleeve 2 drives the inflation assembly to move. The inflation assembly is reset to extract the gas in the cavity 6. The rubber sleeve 5 gradually becomes flat, which facilitates the removal of the metal hose 14 while protecting the integrity of the rubber sleeve 5, reducing the occurrence of air leakage and improving the detection accuracy of the metal hose 14. Then, pull out the metal hose 14, and then perform other metal hose 14 inspections in the above manner.

[0026] Please combine Figure 1 , Figure 2 As shown, an embodiment of an air-inflating assembly comprises an annular cavity 3 fixedly arranged in a locking sleeve 2, the annular cavity 3 and the locking sleeve 2 forming a storage cavity 8, a rubber ring 9 is fitted and slidably arranged in the storage cavity 8, the rubber ring 9 is fitted and slidably arranged on the surface of the locking sleeve 2, a ventilation pipe 10 is fixedly arranged through the side wall of the rubber ring 9, one end of the ventilation pipe 10 is communicated with the storage cavity 8, and the other end of the ventilation pipe 10 is inserted into the cavity 6 and communicated with it, a plurality of sliding rods 11 are fixedly connected in an annular manner to the side wall of the rubber ring 9, one end of the sliding rod 11 passes through the locking sleeve 2 and is fitted with the surface of the flange 1, the sliding rod 11 is slidably connected to the locking sleeve 2, a compression spring 12 is sleeved on the sliding rod 11, the compression spring 12 is arranged between the annular cavity 3 and the vertical rod of the sliding rod 11, and the side wall of the rubber sleeve 5 is fitted with the side wall of the annular cavity 3.

[0027] The inner diameter of the vent pipe 10 gradually decreases along the direction approaching the rubber sleeve 5 , thereby increasing the pressure of the gas entering the cavity 6 and making it easier to blow up the rubber sleeve 5 .

[0028] The surface of the slide bar 11 in contact with the surface of the flange 1 is an arc surface, which reduces the contact area with the flange 1 and facilitates the sliding of the slide bar 11.

[0029] Combination Figure 1As shown, during use, when the locking sleeve 2 and the flange 1 are screwed and fixed, the locking sleeve 2 drives the annular cavity 3 to move, the annular cavity 3 drives the compression spring 12 to move, the compression spring 12 drives the slide rod 11 to move and fit the surface of the flange 1, the flange 1 pushes the slide rod 11 to move and squeeze the compression spring 12 to deform, the slide rod 11 pushes the rubber ring 9 to slide in the storage cavity 8, and squeezes the gas in the storage cavity 8 into the cavity 6 along the ventilation pipe 10 to blow up the rubber sleeve 5 to seal the surface of the metal hose 14, and the annular cavity 3 moves to squeeze the side wall of the rubber sleeve 5 to ensure the sealing between the annular cavity 3 and the rubber sleeve 5.

[0030] After the metal hose 14 is inspected, the locking sleeve 2 is twisted to separate it from the flange 1. The locking sleeve 2 drives the annular cavity 3 to move, and the annular cavity 3 indirectly drives the slide rod 11 to move and separate from the side wall of the flange 1. At this time, the deformed compression spring 12 pushes the slide rod 11 to move, and the slide rod 11 drives the rubber ring 9 to move to suck the gas in the cavity 6 above the rubber sleeve 5 into the storage cavity 8 along the ventilation pipe 10. The rubber sleeve 5 gradually becomes flat, which is convenient for pulling out the metal hose 14.

[0031] The side wall of the annular cavity 3 is provided with two dovetail grooves 7 of different diameters. A matching ring 4 is slidably arranged in the dovetail groove 7 . The side wall of the ring 4 is fixedly connected to the side wall of the rubber sleeve 5 . The output end of the cavity 6 is arranged between the two rings 4 .

[0032] Please combine Figure 1 As shown, during use, the two dovetail grooves 7 and the two rings 4 realize the rotational connection between the annular cavity 3 and the rubber sleeve 5 to form a whole, the locking sleeve 2 drives the annular cavity 3 to move, and the annular cavity 3 drives the rubber sleeve 5 to move and sleeve on the metal hose 14 through the ring 4.

[0033] A tapered groove 13 is formed at the end of the locking sleeve 2 away from the flange 1 , and the diameter of the tapered groove 13 gradually increases along the direction away from the flange 1 .

[0034] Please combine Figure 1 As shown, during use, when the locking sleeve 2 is inserted into the metal hose 14 , the diameter of the tapered groove 13 gradually increases in a direction away from the flange 1 , so that the metal hose 14 can be inserted into the locking sleeve 2 more accurately.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal hose air tightness detection mechanism, comprising a flange fixedly connected to the output end of a detection box, wherein a locking sleeve is threadedly connected to the flange, and characterized in that: A rubber sleeve is slidably provided in the locking sleeve, and a cavity is annularly opened in the side wall of the rubber sleeve. An air pumping assembly is fixedly connected in the locking sleeve, and an output end of the air pumping assembly is inserted into the cavity and communicated with the cavity. The air pumping assembly can inflate and exhaust the cavity.

2. The metal hose air tightness detection mechanism according to claim 1, characterized in that: The inflation assembly includes an annular cavity fixedly arranged in a locking sleeve, the annular cavity and the locking sleeve forming a storage cavity, a rubber ring is slidably fitted in the storage cavity, the rubber ring is slidably fitted on the surface of the locking sleeve, a ventilation pipe is fixedly provided through the side wall of the rubber ring, one end of the ventilation pipe is communicated with the storage cavity, the other end of the ventilation pipe is inserted into the cavity and communicated with it, a plurality of sliding rods are annularly fixedly connected to the side wall of the rubber ring, one end of the sliding rod passes through the locking sleeve and fits with the flange surface, the sliding rod is slidably connected to the locking sleeve, a compression spring is sleeved on the sliding rod, the compression spring is arranged between the annular cavity and the vertical rod of the sliding rod, and the side wall of the rubber sleeve fits with the side wall of the annular cavity.

3. The metal hose air tightness detection mechanism according to claim 2, characterized in that: The inner diameter of the vent pipe gradually decreases along the direction approaching the rubber sleeve.

4. The metal hose air tightness detection mechanism according to claim 3, characterized in that: The surface where the sliding rod contacts the flange surface is an arc surface.

5. A metal hose air tightness detection mechanism according to any one of claims 2 to 4, characterized in that: The side wall of the annular cavity is provided with two dovetail grooves with different diameters. A matching ring is slidably arranged in the dovetail groove. The side wall of the ring is fixedly connected to the side wall of the rubber sleeve. The output end of the cavity is arranged between the two rings.

6. A metal hose air tightness detection mechanism according to claim 3 or 4, characterized in that: A conical groove is formed at the end of the locking sleeve away from the flange, and the diameter of the conical groove gradually increases along the direction away from the flange.

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