CN204677848U - The special Self-fastening high pressure joint of a kind of high pressure needle valve - Google Patents

Abstract

The utility model discloses a special self-tightening high-pressure joint for a high-pressure needle valve, which comprises a pressure sleeve bolt, a threaded pressure sleeve, a high-pressure connection pipe and a valve body. An indented groove interface is arranged on the inner side of the end of the pressure sleeve bolt; The inner side of the threaded gland is provided with threads, and the threaded gland is threadedly connected with one end of the high-pressure pipe; the end of the high-pressure pipe is provided with a 59° conical surface; the bottom of the valve body port is provided with an inner 60° inclined surface, and the valve The body and the pressure sleeve bolts are connected by threads; compared with the traditional ultra-high pressure joints, non-metallic seals are discarded, thus ensuring the sealing performance under extreme temperatures. At the same time, the locking force of the locking tapered surface seal is changed to avoid the situation of the contact surface being seized.

Description

A special self-tightening high-pressure joint for high-pressure needle valves

technical field

The utility model relates to a joint, in particular to a special self-fastening high-pressure joint for high-pressure needle valves.

Background technique

Couplings are generally used for hose connections, and generally include male and female connectors. When in use, just connect the male connector with the female connector. However, generally after the male connector and the female connector are docked, fluid can be introduced into the pipeline (usually a hose). Before the male joint and the female joint are butted, because the male joint or the female joint cannot bear pressure, the pipeline cannot pass fluid. In addition, in the existing joints, the internal structure of the male joint and the female joint is relatively complicated. When the male joint and the female joint are docked, the operation of connecting the internal channels of the male joint and the female joint is cumbersome and the connection speed is slow. Third, the sealing effect of the existing joints is not good, which easily causes fluid leakage.

Utility model content

The purpose of the utility model is to provide a high-pressure joint which is applicable to a wide range of pressures and ambient temperatures, has a simple structure, good sealing performance and is convenient to use.

In order to achieve the above object, the utility model is achieved in that:

A special self-tightening high-pressure joint for high-pressure needle valves, including a compression sleeve bolt, a threaded compression sleeve, a high-pressure connection pipe and a valve body. The inner side of the end of the compression sleeve bolt is provided with an indented groove interface; There are threads, and the threaded pressure sleeve is threadedly connected with one end of the high-pressure pipe; the end of the high-pressure pipe is provided with a 59° conical surface; the bottom of the valve body port is provided with an inner 60° slope, and the valve body and the pressure sleeve bolts Connected by thread.

Compared with the prior art, the invention has the beneficial effect that: compared with the traditional ultra-high pressure joint, the non-metallic seal is discarded, thereby ensuring the sealing performance under extreme temperature. At the same time, the locking force of the locking tapered surface seal is changed to avoid the situation of the contact surface being seized.

Description of drawings

Fig. 1 is a structural schematic diagram of the self-tightening high-pressure joint dedicated to the high-pressure needle valve of the present invention.

Detailed ways

Below further illustrate the utility model by specific embodiment.

As shown in Figure 1, a special self-tightening high-pressure joint for high-pressure needle valves, including a compression sleeve bolt 1, a threaded compression sleeve 2, a high-pressure connection pipe 3 and a valve body 4, is provided with an indented recess on the inner side of the compression sleeve bolt end. Groove interface; the inner side of the threaded pressure sleeve is provided with threads, and the threaded pressure sleeve is threadedly connected with one end of the high-pressure pipe; the end of the high-pressure pipe is provided with a 59° conical surface; the bottom of the valve body port is provided with an inner 60° slope, and the valve body and the pressure sleeve The bolts are connected by threads.

The high-pressure connecting pipe 3 and the threaded pressure sleeve 2 are processed with fine-toothed left-handed fastening threads that match, the end surface of the high-pressure connecting pipe 3 is processed with a 59° conical surface, the bottom of the valve body 4 port is processed with an inner 60° slope, the valve body 4 and the pressure sleeve bolt 1 Process matching fastening threads. After assembling the 4 parts according to the diagram, tighten the gland bolt 1 with a wrench. The compression force of the gland bolt acts on the threaded gland 2 and transmits it to the high-pressure connecting pipe 3. The conical surface of the high-pressure connecting pipe 3 and the inclined surface of the valve body 4 complete the seal. In addition, when the gland bolt 1 is tightened, it provides clockwise friction to the threaded gland 2, and the clockwise friction acts on the threaded gland 2 of the left-hand thread, so that the threaded gland 2 is lifted in the opposite direction, increasing the high pressure. The tightness between the connecting pipe 3 and the valve body 4 improves the sealing performance.

Claims (1)

1. A special self-tightening high-pressure joint for high-pressure needle valves, which is characterized in that it includes a compression sleeve bolt, a threaded compression sleeve, a high-pressure connection pipe and a valve body, and an indented groove interface is provided on the inner side of the end of the compression sleeve bolt; The inner side of the threaded pressure sleeve is provided with threads, and the threaded pressure sleeve is threadedly connected with one end of the high-pressure pipe; the end of the high-pressure pipe is provided with a 59° conical surface; the bottom of the valve body port is provided with an inner 60° slope, The valve body and the pressure sleeve bolts are connected by threads.