Low-voltage quick switching structure and adapter

Abstract

The utility model provides a low-pressure quick switching structure and an adapter, which can enable a pipeline and a pipe nozzle to be connected more conveniently and can shorten the installation and connection time of the pipeline and the pipe nozzle, and relates to the technical field of adapters. A low-pressure quick switching structure comprises a pipeline, a pipe nozzle and a low-pressure quick adapter, a boss is arranged on the outer side face of the pipe nozzle, and the low-pressure quick adapter comprises a switching pipe body, a sliding sleeve and a pipe nozzle plugging head; a pipe nozzle clamping connecting part is arranged at the front end of the conversion pipe body, a pipeline connecting plug is arranged at the rear end of the conversion pipe body, the pipe nozzle clamping connecting part comprises at least two elastic pieces which are arranged in the circumferential direction of the conversion pipe body at intervals, and protruding parts are arranged on the inner sides of the elastic pieces; the sliding sleeve is arranged on the pipe nozzle clamping connecting part in a sleeving mode, and the pipe nozzle plugging head is arranged in an inner cavity of the conversion pipe body in a sliding mode. According to the utility model, the installation and connection time of the pipeline and the nozzle can be shortened, and the test efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of conversion connector technology, specifically a low-pressure fast conversion structure and conversion connector. Background Technology

[0002] In production, low-pressure airtightness testing is frequently required for products. For example, during the production of motors, the airtightness of their water channels needs to be tested at 300 kPa. Currently, during low-pressure airtightness testing, the airtightness test pipe (air hose) is typically temporarily clamped and fixed to the product's test connection nozzle using clamps to pressurize the product. To ensure a more secure fixation of the test pipe, the nozzle usually has a raised ring on its outer side. This existing pipe connection method requires tightening clamp bolts, resulting in a lengthy installation time and impacting testing efficiency. Therefore, a quick-connect adapter that meets the requirements for low-pressure applications is needed to improve the ease of pipe-nozzle connection, shorten the installation and connection time, and increase testing efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a low-pressure fast conversion structure and adapter that makes it easier to connect pipes and nozzles and shortens the installation and connection time of pipes and nozzles.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a low-pressure quick-connect structure, including a pipe, a nozzle and a low-pressure quick-connect joint, wherein a boss is provided on the outer side of the nozzle;

[0005] The low-pressure quick adapter includes a conversion tube body, a sliding sleeve, and a nozzle plug. The conversion tube body has a nozzle clamping connection at its front end and a pipe connector at its rear end. The nozzle clamping connection includes at least two spring pieces spaced apart along the circumferential direction of the conversion tube body, with protrusions on the inner sides of the spring pieces. The sliding sleeve is fitted onto the nozzle clamping connection to prevent the spring pieces from deforming outwards. The sliding sleeve is slidably connected to the nozzle clamping connection so that it can slide backwards to separate from the spring pieces. The conversion tube body has a first spring connected to the sliding sleeve to allow the sliding sleeve to slide forward and reset. The nozzle plug is slidably disposed within the inner cavity of the conversion tube body to slide back and forth along the inner cavity. The conversion tube body has a second spring connected to the nozzle plug to allow the nozzle plug to slide back to the front end of the inner cavity of the conversion tube body. A sealing structure is provided between the nozzle plug and the inner wall of the conversion tube body. The nozzle plug has a fluid channel connecting its front and rear ends.

[0006] The nozzle is inserted into the nozzle clamping connection and pushes the nozzle sealing head to slide back and forth along the inner cavity of the conversion tube body to make the second spring elastically deform. Then, the second spring presses the front end of the nozzle sealing head against the front end face of the nozzle and seals with the front end face of the nozzle. The spring is clamped on the outer periphery of the nozzle, the protrusion is engaged with the boss, and the sliding sleeve slides forward on the nozzle clamping connection under the action of the first spring to prevent the spring from deforming outward. The pipe is inserted into the pipe connector.

[0007] Furthermore, the front end of the nozzle sealing head is provided with a sealing ring (6) that seals with the front end face of the nozzle.

[0008] This utility model also provides a low-pressure quick adapter, including a conversion tube body, a sliding sleeve, and a nozzle plug;

[0009] The front end of the conversion tube is provided with a nozzle clamping connection part, and the rear end is provided with a pipe plug. The nozzle clamping connection part includes at least two spring pieces that are spaced apart along the circumferential direction of the conversion tube, and the inner side of the spring pieces is provided with a protrusion.

[0010] The sliding sleeve is fitted onto the nozzle clamping connection to prevent the spring from deforming outward. The sliding sleeve is slidably connected to the nozzle clamping connection so that it can slide backward and separate from the spring. The conversion tube body is provided with a first spring that is connected to the sliding sleeve so that the sliding sleeve can slide forward and thus reset.

[0011] The nozzle plug is slidably disposed within the inner cavity of the conversion tube body so as to slide back and forth along the inner cavity of the conversion tube body. The conversion tube body is provided with a second spring connected to the nozzle plug so that the nozzle plug slides back to the front end of the inner cavity of the conversion tube body. A sealing structure is provided between the nozzle plug and the inner wall of the conversion tube body. The nozzle plug is provided with a fluid channel connecting its front and rear ends.

[0012] Furthermore, the front end of the nozzle sealing head is provided with a sealing ring for sealing and engaging with the nozzle end face.

[0013] Furthermore, the sealing ring is embedded in the nozzle plug head.

[0014] Furthermore, a retaining ring located behind the sleeve is slidably sleeved on the conversion tube body, and the second spring is sleeved on the conversion tube body, with one end abutting against the retaining ring and the other end abutting against the sleeve. A retaining ring is provided on the rear side of the retaining ring to abut against it.

[0015] The beneficial effects of this utility model are: the low-pressure quick-connect structure and adapter of this utility model only require inserting the nozzle and the pipe into the nozzle clamping connection part and the pipe plug at both ends of the quick-connect adapter when connecting the nozzle and the pipe. No bolts need to be tightened during the connection of the nozzle and the pipe, making the connection between the pipe and the nozzle more convenient, shortening the installation and connection time of the pipe and the nozzle, and improving the testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the nozzle structure;

[0017] Figure 2 This is a schematic diagram of the low-pressure quick-connect adapter of this utility model;

[0018] Figure 3 This is a schematic diagram of the low-voltage fast-connection structure of this utility model;

[0019] The figure shows: 1. Conversion tube body, 2. Nozzle plug, 3. Sliding sleeve, 4. Second spring, 5. First spring, 6. Sealing ring, 7. Nozzle, 8. Pipe, 9. Retaining ring, 10. Nozzle clamping connection, 11. Pipe connector, 12. Fluid channel, 21. Boss, 71. Spring, 111. Protrusion, 112. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, in the prior art, a boss 71 is provided on the nozzle 7 to facilitate pipe connection. To make the connection between the pipe and the nozzle easier and shorten the installation and connection time, such as... Figure 2 , Figure 3 As shown, a low-pressure quick-connect structure of this utility model includes a pipe 8, a nozzle 7, and a low-pressure quick-connect connector. The outer surface of the nozzle 7 is provided with a boss 71. Figure 2As shown, the low-pressure quick adapter includes a conversion tube body 1, a sliding sleeve 3, and a nozzle plug 2. The front end of the conversion tube body 1 is provided with a nozzle clamping connection part 11 for clamping the inserted nozzle 7, and the rear end is provided with a pipe connector 12 for connecting the pipe 8. The nozzle clamping connection part 11 includes at least two spring pieces 111 spaced apart along the circumferential direction of the conversion tube body 1, and the inner side of each spring piece 111 has a protrusion 112. The sliding sleeve 3 is fitted onto the nozzle clamping connection part 11 to prevent the spring pieces 111 from deforming outwards. The sliding sleeve 3 is slidably connected to the nozzle clamping connection part 11 so that it can slide backwards and separate from the spring pieces 111, allowing the spring pieces 111 to... The nozzle is deformed outwards to facilitate nozzle removal. The conversion tube 1 is connected to the sliding sleeve 3 so that the sliding sleeve 3 can slide forward and reset the first spring 5 that is re-fitted onto the spring piece 111. The nozzle plug 2 is slidably disposed in the inner cavity of the conversion tube 1 so that it can slide back and forth along the inner cavity of the conversion tube 1. The conversion tube 1 is provided with a second spring 4 connected to the nozzle plug 2 so that the nozzle plug 2 can slide back to the front end of the inner cavity of the conversion tube 1. A sealing structure is provided between the nozzle plug 2 and the inner wall of the conversion tube 1. The nozzle plug 2 is provided with a fluid channel 21 connecting its front and rear ends so that fluid can pass through the adapter. The nozzle 7 is inserted into the nozzle clamping connection part 11, and pushes the nozzle sealing head 2 to slide back and forth along the inner cavity of the conversion tube body 1 so that the second spring 4 is elastically deformed. Then, the second spring 4 presses the front end of the nozzle sealing head 2 onto the front end face of the nozzle 7 and seals with the front end face of the nozzle 7. The spring piece 111 is clamped on the outer periphery of the nozzle 7 to radially limit the nozzle. The protrusion 112 is engaged with the boss 71 to axially limit the nozzle. The sliding sleeve 3 slides forward on the nozzle clamping connection part 11 under the action of the first spring 5 to prevent the spring piece 111 from deforming outward, thereby clamping and fixing the nozzle to one end of the low-pressure quick adapter, realizing a sealed connection with one end of the low-pressure quick adapter. The pipe 8 is inserted into the pipe plug 12 to seal the other end of the low-pressure quick adapter, thereby completing the connection between the pipe and the nozzle.

[0022] In this utility model, the pipe connector 12 is an existing tracheal pipe connector.

[0023] like Figure 3 As shown, the usage process of this utility model is as follows:

[0024] Step 1: Slide the sliding sleeve 3 backward to release the spring piece 111. At this time, the spring piece 111 can be elastically deformed outward, which makes it easier for the nozzle 7 to be inserted into the nozzle clamping connection part 11.

[0025] Step 2: Insert the connected nozzle 7 into the nozzle clamping connection part 11 of the conversion tube body 1, so that the protrusion 112 of the spring piece 111 passes over the boss 71 of the nozzle and engages with the boss 71. During the process of inserting the nozzle 7 into the nozzle clamping connection part 11, it will push the nozzle plug head 2 to move backward a certain distance, so that the second spring 4 will produce a certain elastic deformation. Under the reaction of the second spring 4, the front end of the nozzle plug head 2 is pressed against the front end face of the nozzle 7 and seals with the front end face of the nozzle 7, preventing fluid from flowing out of the adapter through the nozzle 7 and the nozzle plug head 2, thus meeting the low-pressure use requirements.

[0026] Step 3: Loosen the sliding sleeve 3. Under the action of the first spring 5, the sliding sleeve 3 will slide forward, thereby tightening the spring piece 111, preventing the spring piece 111 from deforming outward, and ensuring that the spring piece 111 clamps and fixes the nozzle 7.

[0027] Step 4: Insert pipe 8 into pipe connector 12.

[0028] When it is necessary to remove the nozzle, slide the sliding sleeve 3 backward to release the spring piece 111. At this time, the spring piece 111 can elastically deform outward. Then pull the adapter outward to open the spring piece and remove the nozzle.

[0029] The low-pressure quick-connect structure of this utility model only requires inserting the nozzle and pipe into the two ends of the quick-connect joint when connecting the nozzle and pipe, without the need to tighten bolts. This makes the connection between the pipe and nozzle more convenient, shortens the installation and connection time between the pipe and nozzle, and improves testing efficiency.

[0030] In order to achieve a better sealing fit between the nozzle plug 2 and the nozzle, the second spring 4 can be pre-deformed during installation. This way, the nozzle plug 2 only needs to slide backward a small distance to provide a large clamping force from the second spring 4.

[0031] The first and second springs can be either tension springs or compressible springs. In the diagram, both the first and second springs are compressible springs.

[0032] The sealing structure between the nozzle plug 2 and the inner wall of the conversion tube 1 serves to prevent fluid from passing between the nozzle plug 2 and the inner wall of the conversion tube 1. The sealing structure typically uses a sealing ring.

[0033] The front end of the nozzle sealing head 2 can be fitted with a metal sealing structure for sealing the nozzle. To better seal the nozzle, the front end of the nozzle sealing head 2 is provided with a sealing ring 6 that seals with the front face of the nozzle 7. The sealing ring 6 can be attached to the nozzle sealing head 2 by bonding, embedding, or other methods. Preferably, for ease of replacement, the sealing ring 6 is embedded in the nozzle sealing head 2.

[0034] The number of spring pieces 111 can be any number of two or more. In order to facilitate the insertion of the nozzle into the nozzle clamping connection part 11, the number of spring pieces 111 should be at least three.

[0035] Specifically, a retaining ring 9 located behind the sliding sleeve 3 is slidably sleeved on the conversion tube body 1. The second spring 4 is sleeved on the conversion tube body 1, with one end abutting against the retaining ring 9 and the other end abutting against the sliding sleeve 3. The second spring 4 is a compressible spring. A retaining spring 10 is provided on the rear side of the retaining ring 9 to abut against it, preventing the retaining ring 9 from sliding backward. The above structure facilitates the installation of the sliding sleeve 3.

Claims

1. A low-pressure quick-connect structure, comprising a pipe (8), a nozzle (7), and a low-pressure quick-connect connector, wherein the outer side of the nozzle (7) is provided with a boss (71), characterized in that: The low-pressure quick adapter includes a conversion tube body (1), a sliding sleeve (3), and a nozzle plug (2); the front end of the conversion tube body (1) is provided with a nozzle clamping connection part (11), and the rear end is provided with a pipe plug (12). The nozzle clamping connection part (11) includes at least two clamping spring pieces (111) spaced apart along the circumferential direction of the conversion tube body (1), and the inner side of the spring piece (111) is provided with a protrusion (112); the sliding sleeve (3) is sleeved on the nozzle clamping connection part (11) to prevent the spring piece (111) from deforming outward. The sliding sleeve (3) is slidably connected to the nozzle clamping connection part (11) so that it can slide backward and separate from the spring piece (111). 111), the conversion tube body (1) is provided with a first spring (5) connected to the sliding sleeve (3) so that the sliding sleeve (3) slides forward and thus resets; the nozzle plug (2) is slidably disposed in the inner cavity of the conversion tube body (1) so that it can slide back and forth along the inner cavity of the conversion tube body (1); the conversion tube body (1) is provided with a second spring (4) connected to the nozzle plug (2) so that the nozzle plug (2) slides and resets to the front end of the inner cavity of the conversion tube body (1); a sealing structure is provided between the nozzle plug (2) and the inner wall of the conversion tube body (1); the nozzle plug (2) is provided with a fluid channel (21) connecting its front and rear ends; The nozzle (7) is inserted into the nozzle clamping connection part (11) and pushes the nozzle plug (2) to slide back and forth along the inner cavity of the conversion tube body (1) so that the second spring (4) is elastically deformed. Then, the front end of the nozzle plug (2) is pressed against the front end face of the nozzle (7) and sealed with the front end face of the nozzle (7) by the second spring (4). The spring piece (111) is clamped on the outer periphery of the nozzle (7), the protrusion (112) is engaged with the boss (71), and the sliding sleeve (3) slides forward on the nozzle clamping connection part (11) under the action of the first spring (5) to prevent the spring piece (111) from deforming outward. The pipe (8) is inserted into the pipe connector (12).

2. The low-voltage fast-connection structure as described in claim 1, characterized in that: The nozzle plug (2) is provided with a sealing ring (6) that seals with the front end face of the nozzle (7).

3. A low-pressure quick-connect adapter, characterized in that: The low-pressure quick adapter includes a conversion tube body (1), a sliding sleeve (3), and a nozzle plug (2); The front end of the conversion tube (1) is provided with a nozzle clamping connection part (11), and the rear end is provided with a pipe plug (12). The nozzle clamping connection part (11) includes at least two spring pieces (111) spaced apart along the circumferential direction of the conversion tube (1). The inner side of the spring piece (111) is provided with a protrusion (112). The sliding sleeve (3) is fitted on the nozzle clamping connection part (11) to prevent the spring piece (111) from deforming outward. The sliding sleeve (3) is slidably connected to the nozzle clamping connection part (11) so that it can slide backward and leave the spring piece (111). The conversion tube body (1) is provided with a first spring (5) connected to the sliding sleeve (3) so that the sliding sleeve (3) can slide forward and thus reset. The nozzle plug (2) is slidably disposed in the inner cavity of the conversion tube (1) so that it can slide back and forth along the inner cavity of the conversion tube (1). The conversion tube (1) is provided with a second spring (4) connected to the nozzle plug (2) so that the nozzle plug (2) slides back to the front end of the inner cavity of the conversion tube (1). A sealing structure is provided between the nozzle plug (2) and the inner wall of the conversion tube (1). The nozzle plug (2) is provided with a fluid channel (21) connecting its front and rear ends.

4. A low-pressure quick-connect adapter as described in claim 3, characterized in that: The nozzle plug (2) is provided with a sealing ring (6) at the front end for sealing with the nozzle end face.

5. A low-pressure quick-connect adapter as described in claim 4, characterized in that: The sealing ring (6) is embedded in the nozzle plug (2).

6. A low-pressure quick-connect adapter as described in claim 3, characterized in that: The nozzle clamping connection (11) includes at least three spring pieces (111).

7. A low-pressure quick-connect adapter as described in any one of claims 3 to 6, characterized in that: The conversion tube (1) is slidably fitted with a retaining ring (9) located behind the sliding sleeve (3). The second spring (4) is fitted on the conversion tube (1), with one end abutting against the retaining ring (9) and the other end abutting against the sliding sleeve (3). The retaining ring (9) is provided with a retaining ring (10) that abuts against it.

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