CN219090600U - Needle cylinder for multi-piston high-pressure injector - Google Patents
Needle cylinder for multi-piston high-pressure injector Download PDFInfo
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- CN219090600U CN219090600U CN202223572966.1U CN202223572966U CN219090600U CN 219090600 U CN219090600 U CN 219090600U CN 202223572966 U CN202223572966 U CN 202223572966U CN 219090600 U CN219090600 U CN 219090600U
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- piston
- sealing ring
- rear end
- end piston
- syringe
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- 238000007789 sealing Methods 0.000 claims abstract description 50
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 239000003814 drug Substances 0.000 abstract description 17
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000002872 contrast media Substances 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000002591 computed tomography Methods 0.000 description 2
- 238000002583 angiography Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940039231 contrast media Drugs 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000013152 interventional procedure Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a syringe for a multi-piston high-pressure injector, comprising: a syringe housing; the piston body is arranged in the needle cylinder shell and comprises a front end piston and a rear end piston, sealing ring assemblies are arranged on the front end piston and the rear end piston, and the front end piston and the rear end piston are integrally injection molded; a first containing cavity is arranged between the front end piston and the inner wall of the syringe shell, and a second containing cavity is arranged between the front end piston and the rear end piston. When the medicament in the first containing cavity is too much under pressure, the front end sealing ring can not seal the medicament in the first containing cavity, the medicament can leak into the second containing cavity, and the pressure in the second containing cavity is basically atmospheric pressure due to the existence of the front end sealing ring, so that the rear end sealing ring can well seal the medicament leaking into the second containing cavity in the second containing cavity without continuing to leak into the push rod of the high-pressure injector or the equipment.
Description
Technical Field
The utility model relates to the technical field of injectors, in particular to a needle cylinder for a multi-piston high-pressure injector.
Background
During many medical diagnostic and interventional procedures, a physician or other person injects saline or contrast media into a patient in conjunction with Computed Tomography (CT), digital Subtraction Angiography (DSA), magnetic resonance system (MR) imaging to assist the physician in diagnosis and treatment. Normal saline or contrast medium is sucked into the syringe from the medicament bottle through the device, and then reversely pushed out of the syringe through the device and into the patient through the pipeline.
In the use process of the high-pressure injector, the injection pressure is often very large due to the requirements of the vascular pressure and the injection speed existing in the patient, so that the prevention of the leakage of the medicament is very important for the matching of the piston sealing ring and the inner wall surface of the needle cylinder to ensure the injection pressure; in addition, in the use process of the high-pressure injector, the piston rotates due to the reciprocating operation of the push rod and the piston, so that the piston is easy to topple over or pulled off when different contrast agents are replaced. There is a need for a syringe that avoids the above phenomena, and thus better provides optimal diagnosis and treatment for the patient and ensures safe and efficient operation of the device.
The traditional syringe for the high-pressure injector is only provided with one piston matched with the inner wall surface of the syringe, so that accidents such as leakage of medicament, overturning of the piston and the like in the injection process are difficult to completely avoid, and once the accidents occur, the operation of equipment is influenced, a machine is damaged, and the diagnosis and treatment process of a patient are influenced.
Disclosure of Invention
The utility model aims to provide a syringe for a multi-piston high-pressure injector, so as to solve the problems.
In order to solve the above technical problems, the present utility model provides a syringe for a multi-piston high pressure injector, comprising:
a syringe housing;
the piston body is arranged in the needle cylinder shell and comprises a front end piston and a rear end piston, sealing ring assemblies are arranged on the front end piston and the rear end piston, and the front end piston and the rear end piston are integrally injection molded;
a first containing cavity is arranged between the front end piston and the inner wall of the syringe shell, and a second containing cavity is arranged between the front end piston and the rear end piston.
Furthermore, one side of the front end piston is provided with a conical surface, and the outer side walls of the front end piston and the rear end piston are provided with clamping grooves.
Further, the sealing ring assembly comprises a front end sealing ring and a rear end sealing ring, wherein the front end sealing ring is installed on one side of the front end piston, and the rear end piston sealing ring is installed on the rear end piston.
Further, the front end piston and the rear end sealing ring are provided with clamping rings, the front end sealing ring wraps the front end piston partially, the clamping rings of the front end sealing ring are clamped in clamping grooves of the front end piston, and the outer side wall of the front end sealing ring is attached to the inner wall of the piston cylinder.
Further, the snap ring of the rear end sealing ring is clamped in the clamping groove of the rear end piston, and the outer side wall of the rear end sealing ring is attached to the inner wall of the piston cylinder.
Further, a clamping block is arranged on one side of the rear end piston.
The utility model has the beneficial effects that the utility model provides the needle cylinder for the multi-piston high-pressure injector, when the medicament in the first containing cavity is excessively pressed, the front end sealing ring can not seal the medicament in the first containing cavity, the medicament can leak into the second containing cavity, and the pressure in the second containing cavity is basically atmospheric pressure due to the existence of the front end sealing ring, so that the rear end sealing ring can well seal the medicament leaking into the second containing cavity in the second containing cavity without continuously leaking into the push rod or the equipment of the high-pressure injector.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a perspective view of a preferred embodiment of a syringe for a multi-piston high pressure injector of the present utility model;
fig. 2 is a semi-sectional view of a preferred embodiment of a syringe for a multi-piston high pressure injector of the present utility model.
In the figure:
1. a syringe housing; 11. a first cavity; 12. a second cavity;
2. a piston body; 21. a front end piston; 22. a rear end piston; 23. a conical surface; 24. a clamping groove;
3. a seal ring assembly; 31. a front end sealing ring; 32. a rear end sealing ring; 33. a clasp;
4. and (5) clamping blocks.
Detailed Description
The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.
As shown in fig. 1 to 2, the present utility model provides a syringe for a multi-piston high pressure syringe, comprising: a syringe housing 1; the piston body 2 is arranged in the needle cylinder shell 1, the piston body 2 comprises a front end piston 21 and a rear end piston 22, a sealing ring assembly 3 is arranged on the front end piston 21 and the rear end piston 22, and the front end piston 21 and the rear end piston 22 are integrally injection molded; a first containing cavity 11 is arranged between the front end piston 21 and the inner wall of the syringe shell 1, and a second containing cavity 12 is arranged between the front end piston 21 and the rear end piston 22.
The front end piston 21 and the rear end piston 22 are integrally injection molded, and can be regarded as rigid connection, and an external high-pressure injector push rod can push the front end piston 21 and the rear end piston 22 to move in the syringe shell 1 at the same time.
In the use process, when the medicament in the first accommodating cavity 11 is excessively pressed and the front end sealing ring 31 cannot seal the medicament in the first accommodating cavity 11, the medicament leaks into the medicament second accommodating cavity 12 formed by the front end sealing ring 31, the syringe shell 1, the front end piston 21, the rear end sealing ring 32 and the space surrounded by the rear end piston 22, and the pressure in the second accommodating cavity 12 is basically atmospheric pressure due to the existence of the front end sealing ring 31, so that the medicament leaked into the second accommodating cavity 12 can be well sealed in the second accommodating cavity 12 by the rear end sealing ring 32 without continuously leaking into the high-pressure syringe push rod or the high-pressure syringe device, and the medicament leakage phenomenon caused by the excessively large pressure in the syringe is avoided.
One side of the front end piston 21 is provided with a conical surface 23, and the outer side walls of the front end piston 21 and the rear end piston 22 are provided with clamping grooves 24.
The sealing ring assembly 3 comprises a front end sealing ring 31 and a rear end sealing ring 32, wherein the front end sealing ring 31 is arranged on one side of the front end piston 21, the rear end piston 22 is arranged on the rear end piston 22, the front end piston 21 and the rear end sealing ring 32 are provided with a clamping ring 33, the front end sealing ring 31 wraps the front end piston 21 partially, the clamping ring 33 of the front end sealing ring 31 is clamped in the clamping groove 24 of the front end piston 21, the outer side wall of the front end sealing ring 31 is attached to the inner wall of the piston cylinder, the clamping ring 33 of the rear end sealing ring 32 is clamped in the clamping groove 24 of the rear end piston 22, and the outer side wall of the rear end sealing ring 32 is attached to the inner wall of the piston cylinder.
A clamping block 4 is arranged on one side of the rear end piston 22, and the clamping block 4 can be used for installing a high-pressure syringe push rod for pushing the piston to move.
When the piston moves in the syringe housing 1, the front end piston 21 and the rear end piston 22 are always coaxial under the action of the inner wall surface of the syringe housing 1 through the stress balance between the integrally formed multiple pistons and the inner wall of the syringe housing 1, whether the front end piston 21 and the rear end piston 22 rotate or whether the tensile force of the rear end piston 22 is uniform in the disassembling process, so that the contrast agent leakage phenomenon caused by the overturning of the piston is avoided.
The above-described preferred embodiments according to the present utility model are intended to suggest that, in view of the above description, various changes and modifications may be made by the worker in question without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A syringe for a multi-piston high pressure injector, comprising:
a syringe housing (1);
the piston body (2) is arranged in the needle cylinder shell (1), the piston body (2) comprises a front end piston (21) and a rear end piston (22), a sealing ring assembly (3) is arranged on the front end piston (21) and the rear end piston (22), and the front end piston (21) and the rear end piston (22) are integrally injection molded;
a first containing cavity (11) is arranged between the front end piston (21) and the inner wall of the syringe shell (1), and a second containing cavity (12) is arranged between the front end piston (21) and the rear end piston (22).
2. A syringe for a multiple piston high pressure injector as defined in claim 1, wherein,
one side of the front end piston (21) is provided with a conical surface (23), and clamping grooves (24) are formed in the outer side walls of the front end piston (21) and the rear end piston (22).
3. A syringe for a multiple piston high pressure injector as defined in claim 2, wherein,
the sealing ring assembly (3) comprises a front end sealing ring (31) and a rear end sealing ring (32), the front end sealing ring (31) is installed on one side of the front end piston (21), and the rear end piston (22) is installed on the rear end piston (22) in a sealing ring mode.
4. A syringe for a multiple piston high pressure injector as defined in claim 3, wherein,
the front end piston (21) and the rear end sealing ring (32) are provided with a clamping ring (33), the front end sealing ring (31) wraps the front end piston (21) partially, the clamping ring (33) of the front end sealing ring (31) is clamped in a clamping groove (24) of the front end piston (21), and the outer side wall of the front end sealing ring (31) is attached to the inner wall of the piston cylinder.
5. A multiple plunger high pressure syringe as set forth in claim 4 wherein,
the clamping ring (33) of the rear end sealing ring (32) is clamped in the clamping groove (24) of the rear end piston (22), and the outer side wall of the rear end sealing ring (32) is attached to the inner wall of the piston cylinder.
6. A multiple plunger high pressure syringe as set forth in claim 5 wherein,
one side of the rear end piston (22) is provided with a clamping block (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223572966.1U CN219090600U (en) | 2022-12-29 | 2022-12-29 | Needle cylinder for multi-piston high-pressure injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223572966.1U CN219090600U (en) | 2022-12-29 | 2022-12-29 | Needle cylinder for multi-piston high-pressure injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219090600U true CN219090600U (en) | 2023-05-30 |
Family
ID=86457187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223572966.1U Active CN219090600U (en) | 2022-12-29 | 2022-12-29 | Needle cylinder for multi-piston high-pressure injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219090600U (en) |
-
2022
- 2022-12-29 CN CN202223572966.1U patent/CN219090600U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240523 Address after: No. 99 Yaogu Avenue, Jiangbei New District, Nanjing City, Jiangsu Province, 210000 Patentee after: NANJING JUSHA MEDICAL TECHNOLOGY Co.,Ltd. Country or region after: China Patentee after: Nanjing Jusha Display Technology Co.,Ltd. Address before: 215335 room 2109, floor 21, building 3, No. 1, Hongfeng Road, enterprise science park, Qianjin East Road, Kunshan Development Zone, Suzhou, Jiangsu Patentee before: Suzhou Yingjiete Medical Technology Co.,Ltd. Country or region before: China |