Corrosion resistant fire coupling for industrial use

Abstract

The utility model relates to the field of fire department, especially a kind of anticorrosive fire department for factory.The technical problem to be solved by the utility model is to provide an anticorrosive fire department, which can improve the impact resistance, enhance the reliability of connection, and increase the connection fastness with fire hose.A kind of anticorrosive fire department for factory, comprising a connecting sleeve, a pipe jaw connecting sleeve is sleeved on the outer surface of one end of the connecting sleeve, and the pipe jaw connecting sleeve is fixedly connected with the connecting sleeve by a snap ring;the side end face of the connecting sleeve corresponding to the pipe jaw connecting sleeve is provided with a rubber sealing ring;the other end of the connecting sleeve is used for sleeving fire hose, and is fixedly connected with the connecting sleeve by a clamping ring and a clamp.The utility model improves the impact resistance, enhances the reliability of connection, and increases the connection fastness with fire hose.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting couplings, and in particular to a corrosion-resistant fire-fighting coupling for use in factories. Background Technology

[0002] Fire hose couplings are crucial components connecting fire hoses to fire hydrants, fire pumps, or other hoses. Their reliability directly impacts the efficiency and safety of firefighting and rescue operations. Currently, most common fire hose couplings are made of aluminum alloy, a material known for its lightweight and corrosion resistance, which to some extent meets the basic requirements of firefighting equipment. However, in actual use, aluminum alloy couplings also exhibit several significant drawbacks. First, aluminum alloy has relatively low hardness, making it highly susceptible to deformation or surface damage from impacts during frequent use, handling, and storage of fire hoses. Once the coupling structure deforms, it will severely damage the hose. This can significantly impact the sealing performance between the connector and the interface, potentially causing leaks or even detachment at the connection, posing a safety hazard during firefighting and rescue operations. Secondly, in specific environments such as factories, workers' hands are easily contaminated with oil. If a fire hose needs to be connected quickly in an emergency, oil contamination can cause the operator to slip when holding the connector, making it difficult to apply sufficient torque for a quick and reliable connection. This can severely delay firefighting efforts and may even cause the hose to detach under pressure due to an insecure connection. Therefore, there is an urgent need to develop a corrosion-resistant fire hose connector that can improve impact resistance, enhance connection reliability, and increase the tightness of the connection with the fire hose. Utility Model Content

[0003] In order to overcome the shortcomings of existing aluminum alloy fire hose couplings, which have low hardness and are easily deformed and damaged by impacts, affecting their sealing performance with the interface, this utility model aims to provide a corrosion-resistant fire hose coupling that can improve impact resistance, enhance connection reliability, and increase the tightness of the connection with the fire hose.

[0004] This utility model is achieved by the following specific technical means:

[0005] A corrosion-resistant fire hose coupling for factory use includes a connecting sleeve and a threaded connecting sleeve fitted onto the outer surface of one end of the connecting sleeve. The threaded connecting sleeve is fixedly engaged with the connecting sleeve by a retaining ring. A rubber sealing ring is provided on one end face of the connecting sleeve corresponding to the threaded connecting sleeve. The other end of the connecting sleeve is used to fit a fire hose and is fixedly connected to the connecting sleeve by a retaining ring and a clamp.

[0006] A protective sleeve is fitted on the outer surface of the threaded connector sleeve, and the inner surface of the protective sleeve is in close contact with the outer surface of the threaded connector sleeve. A locking sleeve is fitted on the end of the connecting sleeve away from the threaded connector sleeve, and the locking sleeve extends into the central hole of the threaded connector sleeve at the end near the threaded connector sleeve, and is fixedly connected to the threaded connector sleeve by threads. The locking sleeve at the end away from the threaded connector sleeve axially limits the protective sleeve through a shoulder. A pressure ring is also fitted on the outer surface of the connecting sleeve between the retaining ring and the clamp. The pressure ring is an open ring, and its outer diameter surface is set as a tapered outer surface with a taper. The central hole of the locking sleeve is set as a tapered hole that matches the tapered outer surface of the pressure ring.

[0007] The protective sleeve includes a protective shell; a buffer layer covering the inner surface of the protective shell; and a plurality of axially protruding anti-slip strips provided on the outer surface of the protective shell.

[0008] Furthermore, the protective shell is made of high-strength metal, and the buffer layer is made of buffer rubber; the protective shell provides primary protection, while the buffer layer effectively cushions external impacts.

[0009] Furthermore, the buffer rubber layer of the protective sleeve is integrally bonded to the protective shell through vulcanization molding.

[0010] Furthermore, the plurality of anti-slip ridges are evenly distributed in a ring around the outer diameter surface of the threaded connector sleeve.

[0011] Furthermore, the outer surface of the protective housing is coated with a corrosion-resistant coating.

[0012] Furthermore, the outer surface of the locking sleeve is provided with anti-slip knurling; this facilitates the rotation of the locking sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention achieves the effects of improving impact resistance, enhancing connection reliability, and increasing the tightness of the connection with fire hoses.

[0015] The protective sleeve provides protection and ease of operation, while the locking sleeve and the conical surface of the compression ring increase the tightness of the connection with the fire hose. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 4 This is a cross-sectional view of the protective sleeve of this utility model.

[0020] The markings in the attached diagram are as follows: 1-connecting sleeve, 2-clamping ring, 3-pipe thread connecting sleeve, 4-rubber sealing ring, 5-clamping ring, 6-clamp, 7-protective sleeve, 8-locking sleeve, 9-pressure ring, 71-protective shell, 72-buffer layer, 73-anti-slip convex strip. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings: Example

[0022] A type of corrosion-resistant fire-fighting coupling for factories, such as Figure 1-4 As shown, it includes a connecting sleeve 1, a threaded connecting sleeve 3 fitted onto the outer surface of one end of the connecting sleeve 1, the threaded connecting sleeve 3 being fixedly engaged with the connecting sleeve 1 by a retaining ring 2; a rubber sealing ring 4 is provided on one end face of the connecting sleeve 1 corresponding to the threaded connecting sleeve 3; the other end of the connecting sleeve 1 is used to fit a fire hose, and is fixedly connected to the connecting sleeve 1 by a retaining ring 5 and a clamp 6;

[0023] The outer surface of the threaded connector 3 is fitted with a protective sleeve 7, and the inner surface of the protective sleeve 7 is in close contact with the outer surface of the threaded connector 3. A locking sleeve 8 is fitted at the end of the connecting sleeve 1 away from the threaded connector 3. The locking sleeve 8 extends into the central hole of the threaded connector 3 at the end near the threaded connector 3 and is fixedly connected to the threaded connector 3 by threads. The locking sleeve 8 at the end away from the threaded connector 3 axially limits the protective sleeve 7 via a shoulder. A pressure ring 9 is also fitted on the outer surface of the connecting sleeve 1 between the retaining ring 5 and the clamp 6. The pressure ring 9 is an open ring with a tapered outer surface. The central hole of the locking sleeve 8 is a tapered hole that matches the tapered outer surface of the pressure ring 9.

[0024] The protective sleeve 7 includes a protective shell 71; a buffer layer 72 covering the inner surface of the protective shell 71; and a plurality of axially protruding anti-slip strips 73 provided on the outer surface of the protective shell 71.

[0025] Working principle:

[0026] This utility model fire hose coupling connects to a fire hose via a connecting sleeve 1 and connects to external fire equipment, such as a fire hydrant or the interface of another section of hose, via a threaded connecting sleeve 3. The threaded connecting sleeve 3 is fixedly engaged with the connecting sleeve 1 via a retaining ring 2 to ensure structural stability. The rubber sealing ring 4 provided on the end face of the connecting sleeve 1 provides a sealing effect during connection to prevent water leakage.

[0027] The core improvement lies in the addition of a protective sleeve 7 and a locking sleeve 8. The protective sleeve 7 is fitted onto the outer surface of the threaded connection sleeve 3, and its inner surface buffer layer 72 fits tightly against the outer surface of the threaded connection sleeve 3, effectively buffering external impacts and vibrations and preventing damage to the threaded connection sleeve 3 due to bumps. The protective shell 71 is made of high-strength metal, providing the main body protection. The anti-slip ridges 73 on the outer surface enhance the grip during operation and facilitate screwing. The locking sleeve 8 is fitted onto the end of the connecting sleeve 1 away from the threaded connection sleeve 3. One end extends into the central hole of the threaded connection sleeve 3 and is connected to it by threads, while the other end is axially limited by a shoulder to prevent the protective sleeve 7 from loosening and falling off. The outer surface of the locking sleeve 8 is provided with anti-slip knurling to facilitate the application of torque.

[0028] Meanwhile, a clamping ring 9 is also provided on the outer surface of the connecting sleeve 1 between the retaining ring 5 and the clamp 6. The clamping ring 9 is an open ring with a conical outer surface. The central hole of the locking sleeve 8 is a matching conical hole. When the locking sleeve 8 is screwed on, it moves axially towards the protective sleeve 7. On the one hand, it clamps the protective sleeve 7 through the shoulder. On the other hand, it generates a radially contracting clamping force by cooperating with the conical outer surface of the clamping ring 9 through the conical hole. This firmly clamps the middle section of the fire hose joint onto the connecting sleeve 1, increasing the connection strength between the fire hose and the connecting sleeve 1 and preventing the fire hose from loosening due to excessive water pressure. The conical surface mating structure has a self-centering function, ensuring that the clamping force is evenly distributed and improving the reliability and sealing of the connection.

[0029] Although this disclosure has been described in detail with reference to exemplary embodiments, it is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of this disclosure.

Claims

1. A corrosion-resistant fire hose coupling for factory use, comprising a connecting sleeve (1), a threaded connecting sleeve (3) fitted onto the outer surface of one end of the connecting sleeve (1), wherein the threaded connecting sleeve (3) is fixedly engaged with the connecting sleeve (1) by a retaining ring (2); a rubber sealing ring (4) is provided on one end face of the connecting sleeve (1) corresponding to the threaded connecting sleeve (3); the other end of the connecting sleeve (1) is used to fit a fire hose and is fixedly connected to the connecting sleeve (1) by a retaining ring (5) and a clamp (6); Its features are, The outer surface of the threaded connector sleeve (3) is fitted with a protective sleeve (7), and the inner surface of the protective sleeve (7) is tightly fitted with the outer surface of the threaded connector sleeve (3); a locking sleeve (8) is fitted at the end of the connecting sleeve (1) away from the threaded connector sleeve (3), and the locking sleeve (8) extends into the center hole of the threaded connector sleeve (3) at the end near the threaded connector sleeve (3), and is fixedly connected to the threaded connector sleeve (3) by threads; the locking sleeve (8) axially limits the protective sleeve (7) at the end away from the threaded connector sleeve (3) through a shoulder; a pressure ring (9) is also fitted on the outer surface of the connecting sleeve (1) between the retaining ring (5) and the clamp (6), and the pressure ring (9) is an open ring with a tapered outer surface with a taper; the center hole of the locking sleeve (8) is a tapered hole that matches the tapered outer surface of the pressure ring (9); The protective sleeve (7) includes a protective shell (71); a buffer layer (72) covering the inner surface of the protective shell (71); and a plurality of anti-slip ridges (73) protruding along the axial direction are provided on the outer surface of the protective shell (71).

2. The corrosion-resistant fire-fighting coupling for factories according to claim 1, characterized in that, The protective shell (71) is made of high-strength metal, and the buffer layer (72) is made of buffer rubber.

3. The corrosion-resistant fire-fighting coupling for factories according to claim 2, characterized in that, The buffer rubber layer of the protective sleeve (7) is integrally bonded to the protective shell (71) by vulcanization molding.

4. The corrosion-resistant fire-fighting coupling for factories according to claim 1, characterized in that, The aforementioned anti-slip ridges (73) are evenly distributed in a ring around the outer diameter surface of the threaded connector (3).

5. A corrosion-resistant fire-fighting coupling for factories according to claim 1, characterized in that, The outer surface of the protective housing (71) is coated with a corrosion-resistant coating.

6. The corrosion-resistant fire-fighting coupling for factories according to claim 1, characterized in that, The outer surface of the locking sleeve (8) is provided with anti-slip knurling.

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