CN201684228U - Disposable charcoal kidney - Google Patents

Abstract

The utility model discloses a disposable charcoal kidney, comprising a middle tube (1), a press cover (2), a blood-nozzle small cap (3), a filter gauze and a resin charcoal absorbent (8), wherein two ends of the middle tube (1) are respectively sealed by one press cover (2) and a blood-nozzle (2a) is arranged in the center of the press cover (2) and sealed by the blood-nozzle small cap (3) and the filter gauze is respectively arranged in the middle tube (1) near to each press cover (2); an annular groove is opened at the opening end surface of the press cover (2) and the perimeter inner wall of the annular groove is in step shape and the inner wall of the inner circle is provided with a rib (2b) and an end head (1d) of the middle tube (1) is inserted into the annular groove (3) to realizes the butt-joint and weld by the ultrasonic wave.

Description

Disposable use charcoal kidney

Technical field

This utility model relates to a kind of medical apparatus and instruments, relates in particular to the disposable use charcoal kidney in blood purification field.

Background technology

In recent years, the blood purification therapy develops rapidly and popularizes in China.The demand of wherein disposable use charcoal kidney increases year by year.Disposable use charcoal kidney carries out hemoperfusion treatment, removes the exogenous toxicant of interior life in the blood of human body by the method for extracorporeally circulating blood perfusion, reaches the purpose of evolution blood.

Disposable use charcoal kidney is connected in the outer circulation bloody path of lead body in the blood purification process, and the resin charcoal is with the absorption of the toxicant in the blood when disposable use charcoal kidney for blood flow, and the blood that is cleaned enters body-internal-circulation again.So the sterilization of disposable use charcoal kidney, the particularly sealing after the sterilization are stored, transportation is extremely important.In the process of sealing transportation,, can cause air admission to pollute the resin charcoal of filling in the disposable use charcoal kidney if disposable use charcoal kidney is poorly sealed, gnotobasis is destroyed, and the resin charcoal can escape out, causes disposable use charcoal kidney contaminated equally, can't use.

At present, common disposable use charcoal kidney all is made up of middle tube, filter screen, end cap, locking nut, block rubber cushion and acticarbon etc., in assembling, filter screen is contained in the middle tube, end cap (gland) is sealed middle tube, adorn a rubber cushion between end cap and the middle tube, by locking nut locking, the blood mouth of end cap central authorities is by the rubber cushion press seal on block and the block between end cap and the middle tube.Whole disposable use charcoal kidney has 14 primary clusterings, needs 7 molds, more complicated, and production cost is higher.Several seal points of disposable use charcoal kidney all are by threaded engagement simultaneously, tighten sealing, and disposable use charcoal kidney is when sterilization, because certain deformation can appear in high temperature, highly compressed effect, becoming flexible can appear in the cooperation of screw thread, need tighten once more, pollutes.In order to overcome above drawback, the someone attempts that sealing place is rotated friction welding to needs, but in welding process, can produce many flying chips in contact friction moment, and flying chip is on filter screen, in case it is very big to human body harm to enter blood.Also the someone attempts the eddy current welding is carried out in needs sealing place, welding is to heat by the metal induction coil to carry out the plastic molting welding, because induction coil is concentric with the very difficult assurance in the position of bonding wire, circumference temp is difficult to consistent, welding effect is difficult to guarantee that waste product is many behind the welding fabrication.Adopt what sealing structure at disposable use charcoal kidney field tank body is the problem that is difficult to solution always.

The utility model content

It is a kind of by ultra-sonic welded that technical problem to be solved in the utility model is to provide, the disposable use charcoal kidney of good sealing effect.

The technical solution of the utility model is as follows: a kind of disposable use charcoal kidney, comprise middle tube, gland, blood mouth small cap, filter screen and adsorbent, its key is: the tube two ends are sealed by a gland respectively in described, described gland central authorities are provided with the blood mouth, this blood mouth is by blood mouth small cap press seal, filter screen is equipped with at the interior close gland place separately of tube respectively in described, in the middle tube 1 between described two filter screens adsorbent is housed, and this adsorbent is the resin charcoal; Described gland opening end face has cannelure, described cannelure excircle inwall is a stairstepping, the cannelure inner periphery inwall of this gland axially is evenly equipped with rib, tube termination outer circumference surface is the stairstepping that adapts with gland cannelure excircle inwall in described, should insert butt joint in the gland cannelure in middle tube termination, it is one that described middle tube termination outer circumference surface supports ultra-sonic welded by rib.This structure adapts to ultra-sonic welded, tube termination outer circumference surface and gland cannelure excircle inwall have certain tiny gap in before welding, middle tube termination inner peripheral surface props up i.e. support by the cannelure inner periphery inwall rib of gland, through ultra-sonic welded, middle tube termination outer circumference surface is for to fuse into one with gland cannelure excircle inwall, the cannelure inner periphery inwall muscle uniform distribution of gland all with to power supports a tube termination outer circumference surface in when welding, in the tube termination can be not inwardly or unbalance stress, situations such as slit appear after making welding one-body molded, the sealing of gland and middle tube is very good, no matter be in the sterilization transportation, still long term storage, disposable use charcoal kidney can both keep aseptic; Adsorbent is selected the resin charcoal for use, has the dual-use function of resin and active carbon, the intensity height, and blood compatibility is good, and micropowder comes off few.

The gland of above-mentioned blood mouth periphery is provided with sheath, and this jacket inner wall is provided with female thread.When the blood mouth is connected with extension tube attached, the screw thread of extension tube attached outer wall and jacket inner wall screw thread threaded engagement, it is more firm to make that the blood mouth is connected with extension tube attached.

Also be provided with the oversheath of protection blood mouth on the gland of above-mentioned sheath periphery.Oversheath can protect the blood mouth can not be subjected to the external force collision in use or transportation, comes off with extension tube attached, simultaneously because there has been the whole disposable use charcoal kidney of oversheath can erect placement, and has increased the aesthetic property of disposable use charcoal kidney.

The top of the screen frame excircle of above-mentioned filter screen is provided with the protruding eaves of a circle, middle tube inwall by described gland is provided with the two-stage step, fit in described first step face and screen frame lower surface, fit in described second step face and protruding eaves lower surface, the transition face between described first step face and the second step face is to fit with the screen frame outer circumference surface of protruding eaves below.The contact position of tube between the inwall forms two places and turns round in the screen frame, thus in the process that purifies the blood clinically adsorbent be difficult for from screen frame and gap leakage between the inwall, blood is polluted.

Above-mentioned annular screen frame lower surface opens first cannelure, and described screen cloth edge embeds in first cannelure.Injection molded of screen cloth and screen frame is in conjunction with more firm.

Above-mentioned blood mouth small cap partly is made up of top enlarged diameter section and bottom reduced diameter section two, described small cap top is that hands is twisted part, the small cap bottom be with gland on the suitable male thread portion of blood mouth, described external thread part is divided into the tubular structure of lower ending opening, described male thread portion upper end closed, and the internal diameter upper end of described male thread portion is little, it is big that the lower end becomes gradually, and be extended with stopper under the mediad of described male thread portion upper end, described stopper upper end diameter is big, and lower end diameter diminishes tapered gradually.After blood mouth small cap and gland blood mouth threaded engagement are tightened, 1, the sealing that matches of the big end down tapering of the up-small and down-big tapering of male thread portion internal diameter and blood mouth; 2, the stopper of blood mouth small cap stretches into gland blood mouth oral area endoporus it is sealed; 3, blood mouth small cap inner top surface is pushed down the face seal of blood mouth mouth end, forms three-dimensional sealing, makes that the sealing of blood mouth small cap and gland blood mouth is tight, can not produce pollution.

Above-mentioned stopper lower end surface is spherical.In the process that is screwed into, it is more smooth and easy that stopper enters gland blood mouth.

Beneficial effect: the utlity model has simple in structure, design uniqueness, gland and tube-in-tube structure adapt to ultra-sonic welded, and the disposable use charcoal kidney good sealing effect of welding fabrication is difficult for polluting; It is tight that blood mouth small cap and gland blood mouth have unique tri-dimensional sealed effect sealing; Assembly reduces, and mould reduces the cost that greatly reduces the manufacturing.

Description of drawings

Fig. 1 is this utility model structural representation;

Fig. 2 is the partial enlarged drawing of A portion among Fig. 1;

Fig. 3 is the partial enlarged drawing of B portion among Fig. 1.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As Fig. 1, shown in Figure 2, a kind of disposable use charcoal kidney, tube 1 in comprising, gland 2, blood mouth small cap 3 and filter screen, tube 1 two ends are sealed by a gland 2 respectively in described, described gland 2 opening end faces have cannelure, described cannelure excircle inwall is a stairstepping, the cannelure inner periphery inwall of this gland 2 axially is evenly equipped with rib 2b, the bar number of rib is 16 or 18 and all can, tube 1 termination outer circumference surface is the stairstepping that adapts with gland 2 cannelure excircle inwalls in described, should insert butt joint in gland 2 cannelures by middle tube 1 termination 1d, it is one that described middle tube 1 termination outer circumference surface supports ultra-sonic welded by rib 2b.Described gland 2 central authorities are provided with blood mouth 2a, described blood mouth small cap 3 partly is made up of top enlarged diameter section and bottom reduced diameter section two, described small cap top is that hands is twisted part 3a, the small cap bottom be with gland on the suitable male thread portion 3b of blood mouth, described male thread portion 3b is the tubular structure of lower ending opening, described male thread portion 3b upper end closed, the internal diameter upper end of described male thread portion 3b is little, it is tapered greatly that the lower end becomes gradually, and be extended with stopper 3c under the mediad of described male thread portion 3b upper end, described stopper 3c upper end diameter is big, and lower end diameter diminishes gradually and is conical, and stopper 3c lower end surface is spherical.This blood mouth 2a is by blood mouth small cap 3 press seals, and blood mouth 2a wall is divided into inside and outside two circles, and blood mouth small cap 3 male thread portions insert between inside and outside two circles of blood mouth 2a, and the outer ring has after female thread and blood mouth small cap 3 male thread portion threaded engagement tighten.Stopper 3c and blood mouth 2a form tri-dimensional sealed.In order to be connected firmly with external transducer potector, the gland 2 of blood mouth 2a periphery is provided with sheath 6 simultaneously, and these sheath 6 inwalls are provided with female thread.Also be provided with the oversheath 7 of protection blood mouth 2a on the gland 2 of described sheath 6 peripheries.Filter screen is equipped with at tube 1 interior close gland 2 places separately respectively in described, in the middle tube 1 between described two filter screens adsorbent is housed, and this adsorbent is the resin charcoal; The top of screen frame 4 excircles of filter screen is provided with the protruding eaves 4a of a circle, (referring to Fig. 2) is provided with the two-stage step by middle tube 1 inwall of described gland 2, fit in described first step face 1a and screen frame 4 lower surfaces, fit in described second step face 1b and protruding eaves 4a lower surface, the transition face between described first step face 1a and the second step face 1b is that screen frame 4 outer circumference surfaces of 1c and protruding eaves 4a below are fitted.Screen frame 4 upper surfaces are spacing by gland, and the lower surface is spacing by first step face 1a, and filter screen is stuck in the middle tube firmly.Annular screen frame 4 lower surfaces have the first cannelure 4b, and described screen cloth 5 edges embed in the first cannelure 4b, single injection-molded, sound construction.

Although below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described; but this utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic rather than determinate; those of ordinary skill in the art is under enlightenment of the present utility model; under the prerequisite of this utility model aim and claim; can make multiple similar expression, such conversion all falls within the protection domain of the present utility model.

Claims (7)

1. disposable use charcoal kidney, comprise middle tube (1), gland (2), blood mouth small cap (3), filter screen and adsorbent (8), it is characterized in that: tube (1) two ends are sealed by a gland (2) respectively in described, described gland (2) central authorities are provided with blood mouth (2a), this blood mouth (2a) is by blood mouth small cap (3) press seal, the interior close gland (2) separately of tube (1) locates to be equipped with respectively filter screen in described, in the middle tube (1) between described two filter screens adsorbent is housed, and this adsorbent is the resin charcoal; Described gland (2) opening end face has cannelure, the cannelure excircle inwall of described gland (2) is a stairstepping, the cannelure inner periphery inwall of this gland (2) axially is evenly equipped with rib (2b), tube (1) termination outer circumference surface is the stairstepping that adapts with gland (2) cannelure excircle inwall in described, should insert butt joint in gland (2) cannelure in middle tube (a 1) termination (1d), it is one that described middle tube (1) termination outer circumference surface supports ultra-sonic welded by rib (2b).

2. according to the described disposable use charcoal kidney of claim 1, it is characterized in that: the peripheral gland (2) of described blood mouth (2a) is provided with sheath (6), and this sheath (6) inwall is provided with female thread.

3. according to the described disposable use charcoal kidney of claim 2, it is characterized in that: the oversheath (7) that also is provided with protection blood mouth (2a) on the gland (2) of described sheath (6) periphery.

4. according to the described disposable use charcoal kidney of claim 1, it is characterized in that: the top of the screen frame of described filter screen (4) excircle is provided with a circle protruding eaves (4a), middle tube (1) inwall by described gland (2) is provided with the two-stage step, described first step face (1a) is fitted with screen frame (4) lower surface, described second step face (1b) is fitted with protruding eaves (4a) lower surface, and the transition face between described first step face (1a) and the second step face (1b) is that (1c) fits with screen frame (4) outer circumference surface of protruding eaves (4a) below.

5. according to claim 1 or 4 described disposable use charcoal kidneys, it is characterized in that: described annular screen frame (4) lower surface has first cannelure (4b), and described screen cloth (5) edge embeds in first cannelure (4b).

6. according to the described disposable use charcoal kidney of claim 1, it is characterized in that: described blood mouth small cap (3) partly is made up of top enlarged diameter section and bottom reduced diameter section two, described small cap top is that hands is twisted part (3a), the small cap bottom be with gland on the suitable male thread portion (3b) of blood mouth, described male thread portion (3b) is the tubular structure of lower ending opening, described male thread portion (3b) upper end closed, the internal diameter upper end of described male thread portion (3b) is little, it is big that the lower end becomes gradually, and be extended with stopper (3c) under the mediad of described male thread portion (3b) upper end, described stopper (3c) upper end diameter is big, and lower end diameter diminishes tapered gradually.

7. according to the described disposable use charcoal kidney of claim 6, it is characterized in that: described stopper (3c) lower end surface is for spherical.

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