Fixing threaded connector for liquid inlet in hydraulic support push rod

Abstract

The utility model provides a hydraulic support push rod internal liquid inlet fixing screwed joint which comprises a joint block and a joint pipe body in threaded fit with the joint block, a chuck limiter is detachably arranged on the upper portion of the joint pipe body, and the chuck limiter is in follow-up fit with the joint pipe body. A plurality of screw holes are formed in the chuck limiter, holding screws are arranged in the screw holes, and the holding screws are used for holding the chuck limiter on the connector block, so that the connector pipe body and the connector block do not rotate relative to each other. According to the liquid inlet fixing threaded connector in the hydraulic support push rod, on the basis that an existing structure of a conventional threaded connector is not damaged, the conventional threaded connector has the anti-loosening capacity.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic supports, and more specifically, to a hydraulic support push rod internal fluid inlet fixing threaded joint. Background Technology

[0002] Traditional coal mining machinery typically uses threaded joints such as KJ-type joints (e.g., KJ25-M332) and DN series joints (e.g., DN25). These two types are secured by tapping threads at the bottom of the joint. During the instantaneous impact of the hydraulic cylinders raising and lowering in coal mine hydraulic supports, vibrations can occur between the threaded joint of the inlet push rod and the joint block. Over time, this can lead to loosening of the threaded joint and even leakage.

[0003] Utility model patent CN222597040U discloses a male-female nut-pressurized anti-loosening connector, comprising a connector body with both ends extending into a tube shape. An outer limiting ring is circumferentially arranged in the middle of the outer wall of the connector body. A threaded connection hole is circumferentially arranged inside the connector body. An inner limiting ring is circumferentially arranged in the middle of the threaded connection hole. Notches are circumferentially opened at both ends of the inner wall of the connector body. A sealing ring, a gasket, and an open ring are symmetrically arranged from the inside to the outside along the inner limiting ring at both ends of the threaded connection hole. The two sealing rings are respectively embedded in the corresponding notches. This male-female nut-pressurized anti-loosening connector can effectively press the entire anti-loosening connector, preventing it from loosening under external force, greatly improving the anti-loosening performance and safety. However, the structure of this male-female nut-pressurized anti-loosening connector is relatively complex and not suitable for improving conventional threaded connectors. Utility Model Content

[0004] To enable conventional threaded joints to prevent loosening without disrupting their existing structure, this invention employs the following technical solution: a hydraulic support push rod internal fluid inlet fixing threaded joint, comprising a joint block and a joint tube body threadedly engaged with the joint block. A chuck limiter is detachably mounted on the upper part of the joint tube body, and the chuck limiter engages with the joint tube body. The chuck limiter has several screw holes, each containing a holding screw. These holding screws hold the chuck limiter on the joint block, preventing relative rotation between the joint tube body and the joint block.

[0005] Based on the above, in order to avoid secondary processing of the connector block, the bottom of the holding screw is provided to extend out of the screw hole, and the bottom of the holding screw holds the side edge of the connector block.

[0006] Based on the above, the lower surface of the chuck limiter is in contact with the upper surface of the connector block.

[0007] Based on the above, the chuck limiter has a strip-shaped locking hole in the middle, and the connector tube body has a locking ring on the upper part, with a locking surface on the locking ring for holding the strip-shaped locking hole.

[0008] Based on the above, a retaining ring is provided between the upper part of the connector tube body and the upper surface of the chuck limiter. The retaining ring is used to press the chuck limiter onto the upper surface of the connector block by the downward pressure of the connector tube body.

[0009] Based on the above, the chuck limiter is disc-shaped, and the diameter of the chuck limiter is greater than the width of the connector block.

[0010] Based on the above, the thickness of the locking ring is greater than or equal to the thickness of the chuck limiter.

[0011] Based on the above, the top of the connector block is provided with a liquid inlet hole, the side of the connector block is provided with a liquid outlet hole that communicates with the liquid inlet hole, and the connector tube body is threadedly connected to the liquid inlet hole.

[0012] Based on the above, the connector tube body is provided with an external thread in the middle, and the bottom of the connector tube body is provided with a connector insertion part for insertion into the liquid inlet hole.

[0013] This utility model has substantial features and advancements compared to existing technologies. Specifically, the hydraulic support push rod internal fluid inlet fixing threaded connector provided by this utility model, through setting a locking ring on a conventional threaded connector, cutting locking surfaces on both sides of the locking ring, assembling a chuck limiter on the locking ring, threading a holding screw on the chuck limiter, and holding the holding screw on the side edge of the connector block, can ensure that there is no relative movement between the connector block and the connector tube body by utilizing the holding action of the holding screw and the locking action of the chuck limiter, effectively preventing the connector tube body from loosening or even leaking. Furthermore, it avoids secondary drilling of the connector block and connector tube body, preventing structural damage caused by secondary processing.

[0014] Furthermore, by creating multiple circular arrays of screw holes on the chuck limiter, the tightness of the connector tube body can be controlled by changing the installation position of the locking screws on the chuck limiter. Therefore, this hydraulic support push rod internal fluid inlet fixing threaded connector can, with appropriate modifications, enable conventional threaded connectors to have anti-loosening capabilities. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the hydraulic support push rod internal liquid inlet fixing threaded joint provided by this utility model.

[0016] Figure 2 This is a side view of the hydraulic support push rod internal liquid inlet fixing threaded joint provided by this utility model.

[0017] Figure 3 This is a schematic diagram of the connector block structure in the hydraulic support push rod internal liquid inlet fixing threaded joint provided by this utility model.

[0018] Figure 4 This is a schematic diagram of the connector tube body structure in the hydraulic support push rod internal liquid inlet fixing threaded joint provided by this utility model.

[0019] Figure 5 This is a schematic diagram of the chuck limiter structure in the hydraulic support push rod internal liquid inlet fixing threaded joint provided by this utility model.

[0020] In the diagram: 1. Liquid outlet; 2. Chuck limiter; 3. Holding screw; 4. Screw hole; 5. Connector tube body; 6. Snap ring; 7. Connector block; 8. Liquid inlet; 9. Locking ring; 10. Locking surface; 11. Connector insertion part; 12. Connector threaded part; 13. Strip-shaped locking hole. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0022] Example 1

[0023] This embodiment provides a hydraulic support push rod internal fluid inlet fixing threaded joint, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the device includes a connector block 7 and a connector tube body 5 that is threadedly engaged with the connector block 7. A chuck limiter 2 is detachably mounted on the upper part of the connector tube body 5. The chuck limiter 2 is engaged with the connector tube body 5. The chuck limiter 2 has several screw holes 4, and a holding screw 3 is disposed in each screw hole 4. The holding screw 3 is used to hold the chuck limiter 2 on the connector block 7 so that the connector tube body 5 and the connector block 7 do not rotate relative to each other.

[0024] Specifically, in this embodiment, to avoid secondary processing of the connector block, the bottom of the holding screw 3 extends out of the screw hole 4, and the bottom of the holding screw 3 holds onto the side edge of the connector block 7. The lower surface of the chuck limiter 2 is in contact with the upper surface of the connector block 7.

[0025] The chuck limiter 2 has a strip-shaped locking hole 13 in the middle, and the connector tube body 5 has a locking ring 9 on the upper part. The locking ring 9 has a locking surface 10 for holding the strip-shaped locking hole 13.

[0026] Specifically, the connector block 7 has an inlet hole 8 at its top and an outlet 1 on its side that communicates with the inlet hole 8. The connector tube body 5 is threaded onto the inlet hole 8. The connector tube body 5 has an external thread in its middle, forming a connector threaded portion 12. The connector tube body 5 has a connector insertion portion 11 at its bottom for insertion into the inlet hole 8.

[0027] Example 2

[0028] This embodiment provides a hydraulic support push rod internal fluid inlet fixing threaded joint. The main difference from embodiment 1 is that in this embodiment, a retaining ring 6 is provided between the upper part of the joint tube body 5 and the upper surface of the chuck limiter 2. The retaining ring 6 is used to press the chuck limiter 2 onto the upper surface of the joint block 7 by the downward pressure of the joint tube body 5.

[0029] Example 3

[0030] This embodiment provides a hydraulic support push rod internal fluid inlet fixing threaded joint. The main difference from Embodiment 1 is that in this embodiment: the chuck limiter 2 is disc-shaped, and the diameter of the chuck limiter 2 is greater than the width of the connector block 7. The thickness of the locking ring 9 is greater than or equal to the thickness of the chuck limiter 2.

[0031] Specifically, the installation steps for the hydraulic support push rod internal fluid inlet fixing threaded joint are as follows:

[0032] First, a retaining ring 6 is embedded at the lower end of the chuck limiter 2 and the connector tube body 5 for buffering and fixing. Then, the chuck limiter 2 is installed on the retaining ring 9 to ensure that the retaining surface 10 on the retaining ring 9 is matched with the strip retaining hole 13 on the chuck limiter 2.

[0033] Then, in the opposite direction of tightening the connector tube body 5, a retaining screw is installed in the first screw hole near the edge of the connector block 7. The retaining screw and the edge of the connector block retain the connector tube body 5 so that it cannot rotate in the opposite direction, thereby preventing the connector tube body 5 from becoming loose.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hydraulic support push rod internal fluid inlet fixing threaded joint, comprising a joint block and a joint pipe body threadedly engaged with the joint block, characterized in that: A chuck limiter is detachably provided on the upper part of the connector tube body. The chuck limiter is engaged with the connector tube body. The chuck limiter has several screw holes, and a holding screw is provided in the screw holes. The holding screw is used to hold the chuck limiter on the connector block so that the connector tube body and the connector block do not rotate relative to each other.

2. The hydraulic support push rod inner fluid inlet fixed threaded joint according to claim 1, characterized in that: The bottom of the holding screw extends out of the screw hole and is held on the side edge of the connector block.

3. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 1, characterized in that: The lower surface of the chuck limiter is in contact with the upper surface of the connector block.

4. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 1, 2, or 3, characterized in that: The chuck limiter has a strip-shaped locking hole in the middle, and the connector tube body has a locking ring on the upper part, with a locking surface on the locking ring for holding the strip-shaped locking hole.

5. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 4, characterized in that: A retaining ring is provided between the upper part of the connector tube body and the upper surface of the chuck limiter. The retaining ring is used to press the chuck limiter onto the upper surface of the connector block by the downward pressure of the connector tube body.

6. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 1, 2, or 3, characterized in that: The chuck limiter is disc-shaped, and the diameter of the chuck limiter is greater than the width of the connector block.

7. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 4, characterized in that: The thickness of the locking ring is greater than or equal to the thickness of the chuck limiter.

8. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 1, characterized in that: The connector block has an inlet hole at the top and an outlet hole on the side that communicates with the inlet hole. The connector tube body is threaded onto the inlet hole.

9. The hydraulic support push rod internal fluid inlet fixing threaded joint according to claim 8, characterized in that: The connector tube body has an external thread in the middle, and the bottom of the connector tube body has a connector insertion part for insertion into the liquid inlet hole.

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