Quick-change assembly of ion exchange column for nuclear medical radioactive wastewater purification

Abstract

The utility model discloses a quick-change component of an ion exchange column for nuclear medical radioactive wastewater purification, which comprises a male port arranged on a liquid inlet joint or a liquid outlet joint of the ion exchange column and a female port arranged on a liquid inlet pipe or a liquid outlet pipe, a reducing section is arranged at the upper end of the female port, the reducing section and the female port are in a step shape in space, and the male port is connected with the female port. An annular limiting surface is constructed at the joint of the two parts; an annular clamping surface for limiting the stretching depth of the male opening is arranged on the periphery of the male opening; wherein the contact positions of the annular limiting surface and the annular clamping surface are respectively provided with an annular sealing gasket, and the contact end surface of each annular sealing gasket is provided with at least one conical structure. According to the quick-change assembly of the ion exchange column for nuclear medical radioactive wastewater purification, the circular ring sealing gaskets with the conical structures are arranged on the contact end faces of the male opening and the female opening, so that the sealing performance after the male opening and the female opening are connected in an inserted mode is more excellent than that of an existing structure.

Description

Technical Field

[0001] The utility model relates to the field of nuclear medical radioactive wastewater treatment equipment, and more specifically, to a quick-change assembly of an ion exchange column for purifying nuclear medical radioactive wastewater. Background Art

[0002] Ion exchange technology is beginning to be used in the purification of radioactive wastewater from nuclear medicine. Ion exchange columns, as carriers of ion exchange fibers or resins, must meet the requirements of the treatment process. The purpose of ion exchange columns in the treatment of radioactive wastewater from nuclear medicine is to extract and remove medical radionuclides from the wastewater. When the adsorbent fibers or resins within the ion exchange column reach saturation, in typical chemical industry applications, the fibers or resins within the column are simply replaced. However, the fibers or resins within ion exchange columns used for the purification of radioactive wastewater from nuclear medicine reach their maximum radioactivity at this point, making it difficult to remove the exchange medium from the column alone from a radiation safety perspective. Furthermore, the replaced fibers or resins require temporary storage in a radiation-protected container until the radioactivity of the adsorbed nuclides decays to a level sufficient for clearance. Therefore, replacing the ion exchange column and its ion exchange medium is a preferred approach because the ion exchange column not only serves as a carrier but also as a temporary storage container for the fibers or resins.

[0003] Furthermore, because the replacement site of the ion exchange column is often in a radiation environment, in order to ensure the radiation safety of the workers, the column replacement time should be reduced as much as possible. However, the liquid inlet and liquid outlet of the existing ion exchange column are not arranged on the same side, that is, in most cases, the liquid inlet of the ion exchange column is arranged on the left side or the lower left end of the ion exchange column, and the liquid outlet of the ion exchange column is arranged on the right side or the upper right end of the ion exchange column. Figure 5 As shown, in actual applications, the liquid inlet and outlet ends of the ion exchange column are connected to the liquid inlet pipe and the liquid outlet pipe respectively through flanges. Therefore, this structural layout of the liquid inlet and outlet ends of the ion exchange column is essentially not capable of quick disassembly.

[0004] It should be further explained that although there are some connectors on the market that can realize quick replacement of pipes, most of these connectors adopt the most convenient plug-in type (male and female ports matching each other). Although they can realize quick connection and quick removal between pipes, the sealing performance of these structures after connection cannot meet the sealing requirements of radiation environment. There is a risk of nuclear leakage during long-term use. That is, the existing connectors that can realize quick replacement cannot be directly applied to the quick removal field of ion exchange columns. Utility Model Content

[0005] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages as will be described below.

[0006] To achieve these objectives and other advantages of the present invention, a quick-change assembly for an ion exchange column for purifying radioactive wastewater in nuclear medicine is provided, comprising: a male port provided on a liquid inlet connector or a liquid outlet connector of the ion exchange column, and a female port provided on a liquid inlet pipe or a liquid outlet pipe and mating with the male port, wherein the liquid inlet connector and the liquid outlet connector of the ion exchange column are both provided on the same side of the ion exchange column;

[0007] The upper end of the female opening is provided with a diameter-reducing section for the male opening to extend into, and the diameter-reducing section and the female opening are spatially stepped, so that an annular limiting surface is constructed at the connection between the diameter-reducing section and the female opening;

[0008] An annular stop surface is provided on the outer periphery of the male port to limit the insertion depth of the male port;

[0009] Wherein, circular sealing gaskets are respectively provided at the positions where the annular limiting surface and the annular locking surface contact each other, and at least one conical structure is provided on the end surfaces where the circular sealing gaskets contact each other.

[0010] Preferably, the male port is provided with a base at the upper end of the annular stop surface by means of a threaded connection;

[0011] Wherein, at least two locking mechanisms are provided on the outer periphery of the base and matched with the bottom of the annular limiting surface.

[0012] Preferably, the locking mechanism comprises:

[0013] a connecting rod hinged to the base;

[0014] a lock hook hinged on the connecting rod;

[0015] Wherein, the base is provided with a limiting piece for stopping the connecting rod, and the free end of the lock is provided with a locking portion that cooperates with the bottom of the annular limiting surface.

[0016] Preferably, a corresponding lead shielding layer is provided on the outer side wall or the inner side wall of the ion exchange column with the male port.

[0017] The present invention includes at least the following beneficial effects: the present invention provides a reducing section on the female port of the liquid inlet pipe or the liquid outlet pipe at the nuclear hospital treatment site, so that the male port on the ion exchange column can be smoothly inserted into the female port. At the same time, the circular sealing gasket provided on the contact end faces of the two and at least one matching conical structure on the circular sealing gasket ensure the sealing performance of the male and female ports after plugging together. The invention can adapt to the field of nuclear medical radioactive wastewater treatment defined by this patent, and can complete the rapid replacement of the ion exchange column when the valve on the liquid inlet pipe or the liquid outlet pipe is in a closed state.

[0018] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a quick-change assembly of an ion exchange column for purification of radioactive wastewater in nuclear medicine in a separated state in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a state in which a quick-change assembly of an ion exchange column for purification of radioactive wastewater in nuclear medicine is plugged in according to an embodiment of the present invention;

[0021] Figure 3 This is a structural schematic diagram of a state in which a quick-change assembly of an ion exchange column for purification of radioactive wastewater in nuclear medicine is connected in one embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of an ion exchange column and a quick-change assembly in cooperation with each other in one embodiment of the present invention;

[0023] Figure 5 It is a structural schematic diagram of an ion exchange column in the prior art. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0025] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0026] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be a communication between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Example 1

[0030] A quick-change assembly of an ion exchange column for purifying radioactive wastewater in nuclear medicine, the structure of which is as follows: Figure 1 、 Figure 4 As shown, it includes: a male port 2 provided on the liquid inlet connector 10 or the liquid outlet connector 11 of the ion exchange column 1, and a female port 3 provided on the liquid inlet pipe 4 or the liquid outlet pipe 5 and matched with the male port.

[0031] The liquid inlet connector 10 and the liquid outlet connector 11 of the ion exchange column are both arranged on the same side of the ion exchange column 1;

[0032] The upper end of the female port 3 is provided with a reducing section 30 for the male port to extend into. The reducing section 30 and the female port 3 are spatially stepped, so that an annular limiting surface 31 is formed at the connection between the reducing section 30 and the female port 3;

[0033] On the outer periphery of the male port 2, an annular stop surface 20 is provided to limit the insertion depth of the male port 2;

[0034] Circular sealing gaskets 5 are respectively provided at the contact points of the annular limiting surface 31 and the annular retaining surface 20, and at least one tapered structure 50 is provided on the contacting end faces of each circular sealing gasket. In actual application, both the male and female ends have tapered circular sealing gaskets at the front end, which seal the purification liquid when the quick connector is closed. The front end step of the female end is increased, mainly to increase the contact surface area of ​​the sealing ring to improve sealing efficiency, and to provide a fulcrum for the retractor hook on the male end.

[0035] The working principle is that a reducing section is provided on the female port of the liquid inlet pipe or the liquid outlet pipe at the nuclear hospital treatment site, so that the male port on the ion exchange column can be smoothly inserted into the female port. At the same time, through the annular sealing gasket provided on the contact end faces of the two, and at least one matching conical structure on the annular sealing gasket (it should be noted in particular that when multiple conical structures are provided on each surface, when the annular sealing gasket is pressed under the action of gravity, each conical structure is meshed in space to form multiple seals, and the sealing performance can be significantly improved), the sealing performance of the male and female ports after plugging is guaranteed, which can adapt to the field of nuclear medical radioactive wastewater treatment defined by this patent, and can complete the rapid replacement of the ion exchange column when the valve on the liquid inlet pipe or the liquid outlet pipe is in the closed state.

[0036] Example 2

[0037] This embodiment 2 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-2 As shown, the following improvements are disclosed based on Implementation 1:

[0038] The male port 2 is provided with a base 6 at the upper end of the annular stop surface 20 by means of a threaded connection. The position of the base 6 on the male port 2 can be adjusted up and down by means of a detachable threaded connection.

[0039] Among them, at least two locking mechanisms 7 are provided on the outer periphery of the base 6 and matched with the bottom of the annular limiting surface 31. The locking mechanisms 7 are distributed at equal angles along the base 6, and their number is greater than or equal to 2 as needed.

[0040] Working principle: In actual application, the base fits with the male port through the internal thread, and the rotating base can move up and down along the male port axis. Its function is that when the elasticity of the ring sealing gasket is weakened, by adjusting the downward position of the base, the connection distance between the pipeline and the interface can be adaptively reduced to ensure that the sealing after connection meets the requirements.

[0041] Example 3

[0042] This embodiment 3 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1 As shown, the following improvements are disclosed based on Implementation 1:

[0043] The locking mechanism 7 comprises:

[0044] A connecting rod 70 is hinged to the base 6, and the connecting rod 70 is connected to the base via a hinge point I 73;

[0045] The lock buckle 71 is hinged on the connecting rod 70 and is connected to the connecting rod through the hinge point II 74. Then, the connecting rod 70 can drive the lock buckle 71 to move upward and inward under the action of external torque to complete the corresponding locking action;

[0046] Among them, the base 6 is provided with a limiting member 60 for stopping the connecting rod 70, and the free end of the lock buckle 7 is provided with a locking portion 72 that cooperates with the bottom of the annular limiting surface 31. In actual application, the locking mechanism of this embodiment is similar to the buckle lock provided on a suitcase, and the structure of its limiting member can be an elastic element (such as the elastic member in a buckle lock with patent number 201720703972.6), or a clamping column with a limiting groove. The connecting rod can be hung on the clamping column or fixed by clamping. The clamping portion is an extended fixing portion used to be stuck at the bottom of the annular limiting surface when in the locked state. Through the tightening force of the lock buckle, the secondary connection and fixation of the pipeline and the interface are completed to ensure that its fixing effect meets the use requirements. In the case of weakening of the elasticity of the circular sealing gasket, by adjusting the downward position of the base, the connection stability and sealing of the pipeline and the interface meet the requirements.

[0047] Working principle: The connection process of the ion exchange column quick-change assembly for nuclear medical radioactive wastewater purification is shown in the axial section. Figure 1-Figure 3 As shown, the installation process of the ion exchange column is as follows:

[0048] Step 1: First, adjust the base to the appropriate position on the male port axis by rotating it. The appropriate position means that when the connecting rod moves to the vertical position (also the end position), the lock can provide the necessary force to tighten the male and female ports.

[0049] Step 2: Move the male port down into the female port until their respective sealing rings touch each other.

[0050] Step 3: Flip the connecting rod upwards and use the external torque to move the connecting rod to the vertical position. The locking part on the lock is just stuck at the bottom of the annular limit surface, and it is fixed under the action and will not fall.

[0051] Disconnection is the reverse process of connection. First, separate the connecting rod from the limiting part, and then use the downward external torque to flip the connecting rod downward and leave the vertical position, so that the locking part is separated from the bottom of the annular limiting surface, and further move the male port away from the female port to the initial position to complete the removal of the ion exchange column.

[0052] Example 4

[0053] This embodiment 4 is a preferred embodiment of the present invention, and its specific structure is as follows Figure 4 As shown, the following improvements are disclosed based on Implementation 1:

[0054] A corresponding lead shielding layer 12 is provided on the outer side wall or the inner side wall of the ion exchange column 1 with the male port 2 .

[0055] The working principle is that a lead shielding layer for radiation protection is set on the ion exchange column used for nuclear medical radioactive wastewater purification, so that when the operator enters the nuclear medical radioactive wastewater purification treatment site, the radioactive elements adsorbed inside the ion exchange column will not cause harm to the operator.

[0056] The above solutions are only examples of preferred embodiments, but are not limited thereto. When implementing the present invention, appropriate replacements and / or modifications can be made according to user needs.

[0057] The number of devices and processing scales described herein are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

[0058] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A quick-change assembly for an ion exchange column for purifying radioactive wastewater in nuclear medicine, comprising: A male port provided on the liquid inlet connector or the liquid outlet connector of the ion exchange column, and a female port provided on the liquid inlet pipe or the liquid outlet pipe and cooperating with the male port, wherein the liquid inlet connector and the liquid outlet connector of the ion exchange column are both provided on the same side of the ion exchange column; The upper end of the female opening is provided with a diameter-reducing section for the male opening to extend into, and the diameter-reducing section and the female opening are spatially stepped, so that an annular limiting surface is constructed at the connection between the diameter-reducing section and the female opening; An annular stop surface is provided on the outer periphery of the male port to limit the insertion depth of the male port; Wherein, circular sealing gaskets are respectively provided at the positions where the annular limiting surface and the annular locking surface contact each other, and at least one conical structure is provided on the end surfaces where the circular sealing gaskets contact each other.

2. The quick-change assembly of the ion exchange column for purifying radioactive wastewater in nuclear medicine according to claim 1, characterized in that: The male port is provided with a base at the upper end of the annular stop surface by means of a threaded connection; Wherein, at least two locking mechanisms are provided on the outer periphery of the base and matched with the bottom of the annular limiting surface.

3. The quick-change assembly of the ion exchange column for purifying radioactive wastewater in nuclear medicine according to claim 2, characterized in that: The locking mechanism comprises: a connecting rod hinged to the base; a lock hook hinged on the connecting rod; Wherein, the base is provided with a limiting piece for stopping the connecting rod, and the free end of the lock is provided with a locking portion that cooperates with the bottom of the annular limiting surface.

4. The quick-change assembly of the ion exchange column for purifying radioactive wastewater in nuclear medicine according to claim 1, characterized in that: A corresponding lead shielding layer is provided on the outer side wall or the inner side wall of the ion exchange column with a male port.

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