CN-224231350-U - Anti-drop anti-blocking radioactive gas-liquid sampling needle

CN224231350UCN 224231350 UCN224231350 UCN 224231350UCN-224231350-U

Abstract

The utility model belongs to the technical field of radioactive gas-liquid sampling of nuclear power plants, and particularly relates to an anti-drop anti-blocking radioactive gas-liquid sampling needle which comprises a needle seat, a connecting part, a needle tube and a sheath, wherein the connecting part is arranged at the top end of the needle seat, the needle tube is connected with the connecting part, the sheath is wrapped on the outer side of the needle tube, and the sheath is used for protecting the needle tube; the top end of the needle tube is an oblique needle point incision, the upper section of the needle tube is provided with a side hole. The needle seat material of the sampling needle is selected to be metal copper, the needle tube is made of 304 stainless steel, the needle seat and the injector are ensured to be fixed more firmly, the mechanical flaring of the needle tube of the sampling needle and the lateral polishing technical means of the needle tube and the needle seat part are realized, the purpose of preventing the needle seat and the needle tube from falling off is realized, and the needle tube of the sampling needle and the needle seat are ensured not to be separated when the pulling force is lower than 100N. Meanwhile, the side hole is arranged at the needle tube, so that the sampling pad can not be blocked during sampling and needle insertion, and the sampling efficiency is improved.

Inventors

SUN YINGYING
PENG BING
WANG BAOXU
JIANG PENG
WANG YUKUN
LIU PENG
HAN YUGANG
WU LIXIN
WANG HUIBO
NIU PENG
LU DAN
Yue Tonghao
ZOU YING

Assignees

中核核电运行管理有限公司
秦山第三核电有限公司

Dates

Publication Date: 20260512
Application Date: 20250521

Claims (9)

1. The radioactive gas-liquid sampling needle is characterized by comprising a needle seat (1), a connecting part (2), a needle tube (3) and a sheath (4), wherein the connecting part (2) is arranged at the top end of the needle seat (1), the needle tube (3) is connected with the connecting part (2), the sheath (4) is wrapped on the outer side of the needle tube (3), the sheath (4) is used for protecting the needle tube (3), the top end of the needle tube (3) is an oblique needle point incision, and a side hole is formed in the upper section of the needle tube (3).
2. The anti-disengaging anti-blocking radioactive gas-liquid sampling needle according to claim 1, wherein the side hole is an oval side hole positioned 5mm from the oblique needle tip incision, the side hole being used to prevent the sampling needle from blocking.
3. The anti-drop anti-blocking radioactive gas-liquid sampling needle according to claim 2, wherein the length of the needle tube (3) is 42mm, the outer diameter of the needle tube (3) is 0.9mm, and the inclined needle point incision is a 17-degree inclined opening.
4. A radioactive gas-liquid sampling needle for preventing disengagement and blocking according to claim 3, wherein the size of the elliptical side hole is 0.8mm for the main shaft and 0.2mm for the minor shaft.
5. The anti-drop anti-blocking radioactive gas-liquid sampling needle according to claim 4, wherein the connecting portion (2) is provided with an inner hole which is transversely polished by a polishing tap (6), and the diameter of the inner hole is matched with the outer diameter of the needle tube (3).
6. The anti-drop anti-blocking radioactive gas-liquid sampling needle according to claim 5, wherein the inner hole of the connecting part (2) is adhered with the needle tube (3) through glue dropping.
7. The anti-drop anti-blocking radioactive gas-liquid sampling needle according to claim 1 is characterized in that the needle tube (3) is made of stainless steel, and the needle seat (1) is made of pure copper nickel plating.
8. The anti-drop anti-blocking radioactive gas-liquid sampling needle according to claim 7, wherein after the needle tube (3) is installed on the needle seat (1), a conical flaring firing pin (5) is adopted to flare the joint of the connecting part (2) and the needle tube (3).
9. The anti-drop and anti-blocking radioactive gas-liquid sampling needle according to claim 7, wherein the conical part length of the conical flaring firing pin (5) is 12mm, and the diameter of the bottom surface of the conical part is 0.12mm.

Description

Anti-drop anti-blocking radioactive gas-liquid sampling needle Technical Field The utility model belongs to the technical field of radioactive gas-liquid sampling of nuclear power plants, and particularly relates to an anti-drop anti-blocking radioactive gas-liquid sampling needle. Background The water and gas in the primary loop of the nuclear power plant and the related systems are high tritium and high radioactivity medium, and particularly in a heavy water reactor unit, the tritium content in the liquid and the gas is high. At present, an injector is adopted for water gas sampling of a primary loop system of a nuclear power plant, a sampling needle of the injector is a medical sampling needle, and the risk of radioactive medium leakage exists in the sampling process of the nuclear power plant. In the prior art, a medical sampling needle is manufactured by referring to GB15811-2001 standard, the allowable pulling force of the needle is more than 45N according to national standard requirements, the pulling force range is 60N-80N when the nuclear power plant samples on site, and the sampling needle is at risk of being separated from a needle seat under the pulling force. The water and gas in the primary loop of the nuclear power plant and the related systems are high-pressure radioactive media, and if the needle head is separated from the needle seat, the high-radioactivity water and gas are sprayed onto the body of a sampling person and field equipment, so that the environment and equipment are polluted, and even the risk of overdose of the sampling person exists. Meanwhile, the needle opening of the medical sampling needle is designed to be an inclined opening, the on-site sampler of the nuclear power plant is a rubber gasket, after the inclined opening needle is inserted into the gasket, the problem that the gasket is punctured to block the sampling needle exists, the sampling needle needs to be replaced for resampling, and the sampling time and the working dose received by workers are increased. Disclosure of utility model The utility model provides an anti-drop anti-blocking radioactive gas-liquid sampling needle, which is used for solving the problem that a needle seat and a needle head are separated and a bevel connection needle is blocked by a gasket in the prior art. The technical scheme of the utility model is as follows: The utility model provides an anti-drop anti-blocking radioactive gas-liquid sampling needle which comprises a needle seat, a connecting part, a needle tube and a sheath, wherein the connecting part is arranged at the top end of the needle seat, the needle tube is connected with the connecting part, the sheath is wrapped on the outer side of the needle tube, the sheath is used for protecting the needle tube, the top end of the needle tube is an oblique needle point incision, and a side hole is arranged at the upper section of the needle tube. In some embodiments, the side hole is an oval side hole disposed 5mm from the beveled tip incision, the side hole being for preventing clogging of the sampling needle. In some embodiments, the needle cannula is 42mm in length, the needle cannula outer diameter is 0.9mm, and the beveled needle tip slit is a 17 bevel. In some embodiments, the size of the oval side holes is 0.8 x 0.2mm. In some embodiments, the connecting portion is laterally ground with a grinding tap to a bore diameter that matches the needle cannula outer diameter. In some embodiments, the inner hole of the connecting part is adhered with the needle tube through glue dripping. In some embodiments, the needle cannula is made of stainless steel, and the needle hub is made of pure copper nickel plating. In some embodiments, after the needle cannula is fitted with the hub, a conically-flared striker is used to flare the junction of the junction with the needle cannula. In some embodiments, the conical portion of the conically-flared striker is 12mm in length and the conical portion floor diameter is 0.12mm. The utility model has the beneficial effects that: The utility model provides an anti-drop anti-blocking radioactive gas-liquid sampling needle, wherein the needle seat material of the sampling needle is selected to be metal copper, the needle tube is made of 304 stainless steel, the needle seat and the injector are ensured to be fixed more firmly, and the utility model adopts the technical means of mechanical flaring of the needle tube of the sampling needle and transverse polishing of the needle tube and the needle seat part, thereby realizing the purpose of preventing the needle seat and the needle tube from dropping mechanically, and ensuring that the needle tube of the sampling needle and the needle seat are not separated when the pulling force is lower than 100N. Meanwhile, the side hole is arranged at the needle tube, so that the sampling pad can not be blocked during sampling and needle insertion, and the sampling efficiency is improved. Drawings FIG. 1 is a schemati