Quick joint of grain sampling pipe

Abstract

The utility model relates to a grain sampling pipe quick connector which comprises a male buckle inserted into one end of a female buckle and a top buckle screwed with the other end of the female buckle, the inner end of the top buckle abuts against the inner end of the male buckle, at least one clamping block is arranged on the inner wall of the female buckle, and vertical grooves corresponding to the clamping blocks are formed in the outer wall of the male buckle. The lower end of the vertical groove communicates with one end of a transverse groove formed in the outer wall of the male buckle, and the other end of the transverse groove communicates with a limiting groove formed in the outer wall of the male buckle. Through an embedded clamping mode, the purpose of quickly connecting the sampling pipe is achieved, the time for assembling and disassembling the sampling pipe in the sampling process is greatly shortened, the working efficiency is improved, and meanwhile, the phenomenon of pipe falling is avoided.

Description

Technical Field

[0001] This application relates to a quick connector, and more particularly to a quick connector for a grain sampling tube. Background Technology

[0002] The grain sampler consists of a vacuum cleaner and a sampling tube. During sampling, the two sections of the sampling tube are connected via a threaded structure, which is manually tightened. Traditional threaded connections are time-consuming and often fail to connect the threads accurately, frequently resulting in misaligned threads or thread wear, leading to stripping. Therefore, existing grain sampling tube quick-connect fittings solve the problem of traditional threaded connections by using a quick-connect design, saving sampling time and reducing work efficiency.

[0003] In the prior art, Chinese utility model patent 201520651684.1 describes a quick connector for grain sampling tubes. This quick connector consists of six parts: an inner connector, a retaining ring, a ball bearing, a sleeve, a spring, and an outer connector. The retaining ring, ball bearing, sleeve, and spring are all mounted on the outer connector. One end of the sampling tube is the outer connector, and the other end is the inner connector. When connecting two sampling tubes, sliding the sleeve downwards easily inserts the inner connector of one sampling tube into the outer connector of the other. The sleeve automatically resets under the spring force, ensuring a reliable connection. Disassembly is similar; sliding the sleeve downwards again easily pulls the tube out, disconnecting the connection. The drawback of this structure is that during use, the exposed sleeve is easily scratched and displaced. Once displaced, the sampling tube may separate.

[0004] Therefore, in order to ensure a stable connection between the two sampling tubes, a quick connector for grain sampling tubes that uses an embedded snap-fit ​​method needs to be designed. Summary of the Invention

[0005] The purpose of this application is to provide a quick connector for grain sampling tubes that can be quickly and stably connected.

[0006] This application is implemented as follows: The quick connector for grain sampling tubes includes a male connector that is inserted into one end of the female connector and a top connector that is screwed into the other end of the female connector. The inner end of the top connector contacts the inner end of the male connector. At least one locking block is provided on the inner wall of the female connector. A vertical groove corresponding to the locking block is provided on the outer wall of the male connector. The lower end of the vertical groove is connected to one end of a horizontal groove provided on the outer wall of the male connector. The other end of the horizontal groove is connected to a limiting groove provided on the outer wall of the male connector.

[0007] The female buckle is a hollow tube with open ends, and its upper end has an internal threaded opening.

[0008] The top buckle is a hollow tube with external threads on the lower part of its outer wall. A sampling tube is fixedly connected to the upper port of the top buckle, and the external threads on the top buckle are matched and screwed into the internal threads of the upper port of the female buckle.

[0009] The upper end of the vertical groove is located at the upper port of the male buckle and protrudes from the groove opening. The vertical groove and the horizontal groove form an L-shaped channel. The end of the L-shaped channel is connected to the limiting groove. The limiting groove is opened upward and is parallel to the vertical groove. The vertical groove, the horizontal groove and the limiting groove together form a channel for the card block to enter.

[0010] The card block is a single piece, and the male buckle is provided with a vertical groove, a horizontal groove, and a limiting groove.

[0011] The locking blocks are two or more, and the two or more locking blocks are symmetrically distributed on the inner wall of the female buckle; correspondingly, the male buckle has vertical grooves on its outer wall that correspond one-to-one with the locking blocks, and the two or more vertical grooves are symmetrically distributed on the outer wall of the male buckle.

[0012] Each vertical slot corresponds to one horizontal slot, and all horizontal slots are opened in the same direction.

[0013] By implementing the above technical solution, this application securely connects the male and female buckles by inserting the locking block on the female buckle into the limiting groove on the male buckle, and then pressing the male buckle downwards with the top buckle, preventing the locking block from disengaging from the limiting groove. This application achieves rapid connection of the sampling tube through an embedded locking method, greatly reducing the time spent loading and unloading the sampling tube during sampling, improving work efficiency, and also preventing the tube from falling out. Attached Figure Description

[0014] The specific structure of this application is given by the following figures and embodiments:

[0015] Figure 1 This is a schematic diagram of the structure of this application;

[0016] Figure 2 This is a cross-sectional structural diagram of the female buckle of this application;

[0017] Figure 3 This is a schematic diagram of the female buckle structure of this application;

[0018] Figure 4 This is a structural diagram of a male buckle.

[0019] Legend: 1. Sampling tube, 2. Top buckle, 3. Female buckle, 3-1. Locking block, 3-2. Internal thread, 4. Male buckle, 4-1. Horizontal groove, 4-2. Vertical groove, 4-3. Limiting groove. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Example: Figure 1-4 As shown, the quick connector for grain sampling tubes includes a male connector 4 that is inserted into one end of the female connector 3, and a top connector 2 that is screwed into the other end of the female connector 3. The inner end of the top connector 2 contacts the inner end of the male connector 4. At least one locking block 3-1 is provided on the inner wall of the female connector 3. A vertical groove 4-2 corresponding to the locking block 3-1 is provided on the outer wall of the male connector 4. The lower end of the vertical groove 4-2 is connected to one end of the horizontal groove 4-1 provided on the outer wall of the male connector 4. The other end of the horizontal groove 4-1 is connected to the limiting groove 4-3 provided on the outer wall of the male connector 4.

[0023] This application achieves connection between the male buckle 4 and the female buckle 3 by engaging a locking block 3-1 on the inner wall of the male buckle 4 and pressing the male buckle 4 downwards with the top buckle 2, causing the locking block 3-1 to enter the limiting groove 4-3 for positioning. This prevents the male buckle 4 from rotating or moving up and down, thus completing the connection between the male buckle 4 and the female buckle 3. Compared to existing technologies, this application places the engaging structure inside the female buckle 3, so strong external pulling or rotation will not affect the connection. Even if the top buckle 2 loosens, the male buckle 4 will not detach from the female buckle 3 as long as the locking block 3-1 does not move to the position of the vertical groove 4-2, resulting in strong overall stability and reducing the likelihood of the pipe falling off.

[0024] Furthermore, such as Figure 2 , 3 As shown, the female buckle 3 is a hollow tube with open ends, and its upper end is an internally threaded port 3-2 with internal threads.

[0025] Furthermore, the top buckle 2 is a hollow tube with external threads on the lower part of its outer wall, and a sampling tube 1 is fixedly connected to the upper port of the top buckle 2. The top buckle 2 is screwed into the female buckle 3 through its external threads, so that the inner end of the top buckle 2 enters the female buckle 3 and contacts the inner end of the male buckle 4.

[0026] Furthermore, such as Figure 4 As shown, the male buckle 4 is a hollow tube with open ends. A sampling tube 1 is fixedly connected to the lower end of the male buckle 4. The outer diameter of the male buckle 4 is equal to or slightly smaller than the inner diameter of the female buckle 3, such that the male buckle 4 can be inserted into the female buckle 3, and the gap between the two is no more than 0.5 mm. For example, the outer diameter of the male buckle is 42 mm and the inner diameter of the female buckle is 42 mm, or the outer diameter of the male buckle is 41 mm and the inner diameter of the female buckle is 42 mm.

[0027] Furthermore, the upper end of the vertical groove 4-2 is located at the upper port of the male buckle 4 and the groove opening is exposed. The vertical groove 4-2 and the horizontal groove 4-1 form an L-shaped channel. The end of the L-shaped channel is connected to the limiting groove 4-3. The opening direction of the limiting groove 4-3 is the same as the opening direction of the vertical groove 4-2. The limiting groove 4-3 is parallel to the vertical groove 4-2. The vertical groove 4-2, the horizontal groove 4-1 and the limiting groove 4-3 together form a channel for the card block 3-1 to enter.

[0028] Furthermore, the locking block 3-1 is a single unit, and the male buckle 4 is provided with a vertical groove 4-2, a horizontal groove 4-1, and a limiting groove 4-3. When the male buckle 4 is inserted upward into the female buckle 3, the upper end of the vertical groove 4-2 is aligned with the locking block 3-1. As the male buckle 4 continues to be inserted, the locking block 3-1 enters the vertical groove 4-2 from the groove until the locking block 3-1 touches the lower end of the vertical groove 4-2. At this point, the male buckle 4 can no longer be inserted inward. The male buckle 4 is rotated in the direction of the horizontal groove 4-1, and the locking block 3-1 enters the horizontal groove 4-1 until the locking block 3-1 moves to the other end of the horizontal groove 4-1 and is in the state of waiting to enter the limiting groove 4-3.

[0029] Furthermore, there are two or more card blocks 3-1, which are distributed axially symmetrically on the inner wall of the female buckle 3.

[0030] Correspondingly, the outer wall of the male buckle 4 is provided with vertical grooves 4-2 that correspond one-to-one with the locking block 3-1, and multiple vertical grooves 4-2 are distributed symmetrically on the outer wall of the male buckle 4.

[0031] Each vertical slot 4-2 corresponds to a horizontal slot 4-1. The horizontal slots 4-1 are opened in the same direction. That is to say, each horizontal slot 4-1 starts from the lower end of its corresponding vertical slot 4-2 and extends to the left to any position between the two vertical slots 4-2, or extends to the right to any position between the two vertical slots 4-2.

[0032] In use, the two sampling tubes 1 are first fixedly connected to the lower port of the male buckle 4 and the upper port of the top buckle 2, respectively. Then, the male buckle 4 is inserted through the lower port of the female buckle 3, so that the locking block 3-1 can enter the corresponding vertical groove 4-2. When the locking block 3-1 reaches the end of the vertical groove 4-2, the male buckle 4 is rotated, so that the locking block 3-1 moves from one end of the horizontal groove 4-1 to the other end. When the locking block 3-1 reaches the opening of the limiting groove 4-3, the top buckle 2 can be screwed in through the upper port of the female buckle 3. As the top buckle 2 is screwed in, the inner end of the top buckle 2 touches the inner end of the male buckle 4. The top buckle 2 continues to be screwed in, so that the male buckle 4 is pushed downward. At this time, the locking block 3-1 enters the limiting groove 4-3, and the male buckle 4 is positioned so that it can neither move upward nor rotate, thus completing the connection of the two sampling tubes 1.

[0033] The above technical features constitute the embodiments of this application, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A grain probe tube quick connector, characterized by: The male buckle is inserted into one end of the female buckle, the top buckle is screwed into the other end of the female buckle, the inner end of the top buckle is in contact with the inner end of the male buckle, at least one clamping block is arranged on the inner wall of the female buckle, a vertical slot corresponding to the clamping block is arranged on the outer wall of the male buckle, the lower end of the vertical slot is communicated with one end of a horizontal slot arranged on the outer wall of the male buckle, and the other end of the horizontal slot is communicated with a limiting slot arranged on the outer wall of the male buckle.

2. The grain probe quick connector of claim 1, wherein: The female buckle is a cavity pipe with open ends, and the upper end is an internally threaded port.

3. The grain probe quick connector of claim 2, wherein: The top buckle is a cavity pipe with an external thread arranged on the lower part of the outer wall, a sample tube is fixedly connected to the upper port of the top buckle, and the top buckle is screwed to the internally threaded port of the female buckle through the external thread.

4. The grain probe quick connector of claim 1 or 2 or 3, wherein: The upper end of the vertical slot is located at the upper port of the male buckle and exposes a slot, the vertical slot and the horizontal slot form an L-shaped channel, the end of the L-shaped channel is communicated with the limiting slot, the limiting slot is arranged in the same direction as the vertical slot, and the vertical slot, the horizontal slot and the limiting slot form a channel for the clamping block to enter.

5. The grain probe quick connector of claim 4, wherein: The limiting slot is parallel to the vertical slot.

6. The grain probe quick connector of claim 4, wherein: The clamping block is one, and the male buckle is provided with one vertical slot, one horizontal slot and one limiting slot.

7. The grain probe quick connector of claim 4, wherein: The clamping block is two or more, and the two or more clamping blocks are distributed in an axial symmetry on the inner wall of the female buckle; correspondingly, the vertical slots corresponding to the clamping blocks are arranged on the outer wall of the male buckle in an axial symmetry.

8. The grain probe quick connector of claim 7, wherein: Each vertical slot corresponds to a horizontal slot, and the horizontal slots are arranged in the same direction.

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