CN2389629Y - Hand-held pressure accumulating liquid nitrogen cryotherapy apparatus - Google Patents

Abstract

The utility model discloses a hand-held pressure accumulating liquid nitrogen cryotherapy apparatus which is composed of a liquid storage bottle which is made of vacuum stainless steel, a bottle cover, a jet pipe, a cryopencil, etc., wherein the bottle cover and the liquid storage bottle are connected by threads, and a normally closed jet valve in a pull rod plunger piston type, a safety one-way valve and a manual air-release valve are arranged on the bottle cover. Because the utility model adopts the storage mode that the liquid nitrogen is sealed to accumulate the pressure, the nitrogen evaporated in the bottle at ordinary times is accumulated in the bottle to realize the effect that jet flow with larger pressure can be jetted out during the therapy process; thereby, the temperature of the cryopencil is quickly lowered. The utility model has the advantages of safe and convenient operation, nitrogen saving and good therapy effect. Thus, the utility model is widely suitable for various clinical cryotherapies.

Description

Hand-held pressure accumulation type liquid nitrogen cryotherapy device

This utility model relates to a kind of low-temperature physics therapy surgical instruments, and particularly a kind of is the hand-held pressure accumulation type liquid nitrogen cryotherapy device of low-temperature receiver with the liquid nitrogen.

Since the sixties, adopt cryogenic technique treatment disease at home and abroad clinicing aspect be used widely, be that the cryosurgical engineering of low-temperature receiver is more popular and adopt with the liquid nitrogen.Existing hand-held liquid nitrogen cryotherapy device is all by the built-in little glass heat-insulating cup of metal shell (or bottle, below be referred to as cup) gallbladder, bowl cover (or rubber closure), vexed pressure valve (or latex tubing), tube for transfusion and copper freezing first-class composition.Its shortcoming is: 1, infusion pressure is low, inconvenient operation: because of liquid nitrogen in the little glass heat-insulating cup gallbladder is to adopt the open banking system of normal pressure to store, no pressure in the cup gallbladder before the treatment, during treatment by the patient with hands by the vexed pressure valve (or hands pinch latex tubing) of cup on the shell, the heat that relies on metal shell to import into, the nitrogen of liquid nitrogen vaporization in glass gallbladder wouldn't outwards be discharged, wait to store form pressure gradually after, can carry liquid nitrogen to freezing head, make it cooling, the pressure that the interim vexed pressure mode of this dependence forms begins higher, just reduce gradually after several seconds, reason is metal shell has absorbed the cold that the nitrogen that overflows outside the liquid nitrogen vaporization passes in a large number in the cup gallbladder after, shell loses heat effect soon, add the rubber ring that is filled in the bowl cover place back hardening of catching a cold, make bowl cover poorly sealed and produce gas leakage, so pressure hold time is very short, carry liquid nitrogen by changeable back less until interruption, need pinch external rubber bulb with hands by the patient and inflate, or with rock back and forth the cup (bottle) way " pressurization ", could continue the course of treatment.Liquid nitrogen is used to three/for the moment in the cup gallbladder, transfusion change difficulty, need in time to replenish liquid nitrogen, make troubles and inconvenience to patient's operation.2, liquid nitrogen volatilization waste is big, need artificial frequent filling liquid nitrogen: heat-insulating property is poor, liquid nitrogen vaporization is fast because of little insulated cup bladder reserves few (200-250 milliliter), every glass of liquid nitrogen can only use 6-8 minute, clinical in two, three patients of every treatment just need in cup to replenish the filling liquid nitrogen.During the filling liquid nitrogen, the patient needs to lift heavy liquid nitrogen container with the arm height and pours in cup, and a large amount of liquid nitrogen is splashed to splash and slatterned when pouring into, and the liquid nitrogen that expends usefulness when the liquid nitrogen of waste is than treatment usually is also many; 3, the easy explosion of glass gallbladder, poor stability: liquid nitrogen temperature is-196 ℃, poor because of little glass gallbladder heat-insulating property, metal shell can frosting freeze hands, impacts because of the glass gallbladder bears cold and hot cataclysm for a long time repeatedly, be very easy to explosion (particularly in season hot summer), bring hidden danger to safety; 4, freezing the little cooling of refrigerating capacity is slow, application surface is narrow: slow in view of the little cooling of low, the freezing refrigerating capacity of infusion pressure, generally need refrigeration clock more than a minute, freezing temperature just can be reduced to below-180 ℃, is only applicable to the operative treatment of general middle or small cold.Slough freezing head, during the direct injection liquid nitrogen,, can not be satisfied with the clinical demand that freezes to destroy tumor because the liquid nitrogen of tube for transfusion ejection is insufficient, again because of spray the liquid nitrogen dynamics little, can't form tiny jet, therefore can't be used for the meticulous treatment of freezing beauty treatment etc.; 5, shell and freezing are perishable: glass gallbladder shell is (or make with the stamp iron sheet) made after chromium plating with heavy steel pipe welding, can frosting after shell is caught a cold during use, and the sweat of being bullied for a long time erosion and getting rusty; Copper freezing head meeting oxidation is unfavorable for sterilization; The rubber ring that is used to seal, rubber closure and latex tubing, ageing failure often need be changed because of enduring cold.

The purpose of this utility model be to provide a kind of infusion pressure height, simple operation, safe and reliable, the liquid nitrogen vaporization loss is little, the hand-held pressure accumulation type liquid nitrogen cryotherapy device of applied range.

The technical solution that realizes this utility model purpose is: a kind of hand-held pressure accumulation type liquid nitrogen cryotherapy device, comprise reservoir, bottle cap, playpipe, freezing head, it is characterized in that bottle cap is provided with the normally closed injection valve of rod-pulling type, safety check valve and manual vent valve, bottle cap is connected by threaded connector with reservoir, between bottle cap and the threaded connector upper surface, be provided with the foam rubber sealing circle, playpipe is threaded with normally closed injection valve.

This utility model compared with prior art has following remarkable advantage: 1, volume is little, in light weight, moulding is exquisite attractive in appearance.As the stainless-steel vacuum dewar bottle of reservoir, by bilayer polishing thin-wall stainless steel shell make, volume is little, in light weight, other metal parts (containing freezing head) major part selects for use stainless steel material to make, can corrosion; 2, big, the freezing head refrigeration of infusion pressure is renderd a service strong: because of having adopted the airtight pressure accumulation banking system of liquid nitrogen, the nitrogen that evaporates in the bottle before the operation stores in reservoir and forms pressure gradually, standing time, longer pressure amount of liquid nitrogen just bigger, that be injected into freezing head was also just more, therefore freezing head refrigeration is renderd a service by force, cooling is fast, and generally cold head just can be reduced to below-180 ℃ in 10 times in second; 3, reservoir can explosion, freezing thawing rewarming be fast, safe and reliable: because of the withstand voltage height of bottle good rigidity, appearance frost-free do not freeze hands, it is little more than 100 times that actual working pressure bears pressure than the bottle explosion, and be provided with the relief valve protector that automatic superpressure is lost heart, so reservoir can never explosion; Big because of infusion pressure again, long, the liquid nitrogen energy continuous injection of holding time, treatment can be carried out continuously, the freezing feverish sensation in the head capacity of the rustless steel of hollow and thin-walled is little, nature thawing rewarming is quick, general in 6 times in second freezing head just can return to room temperature and freezing after the mucosal tissue disengaging, thereby ensured and controlled the safe and reliable of preface work.4, freezing refrigerating speed is adjustable, applied range: pass the size that the injection valve draw rod positions can be controlled liquid nitrogen flow, therefore freezing refrigerating speed just can be regulated and control.Big in view of infusion pressure, as to slough freezing direct injection amount of liquid nitrogen is many, the cryosurgery that can not only be fit to middle or small cold, needing also to be suitable for big cold to freeze to destroy the operation of tumor, when the cold nozzle needle of playpipe front-end configuration special use, liquid nitrogen can be tiny jet and great efforts, can satisfy the clinical demand of meticulous treatments such as freezing beauty treatment, its range of application is very extensive; 5, liquid nitrogen vaporization loss less wastage, reduced medical cost: according to thermodynamic principles, the cryogenic liquid band is pressed and is stored, can significantly reduce its evaporation capacity, in view of what adopt is that airtight pressure accumulation banking system of liquid nitrogen and air-tightness are good, and under the pressure of the inside of a bottle effect, liquid nitrogen vaporization is very slow, therefore the liquid nitrogen vaporization loss is just few, and the liquid nitrogen at the bottom of being stored in bottle almost can be used up.Test factually, after leaving standstill 16 hours, liquid nitrogen just evaporates one bottle of liquid nitrogen (500 milliliters) at normal temperatures and pressures, whenever fills it up with one bottle of liquid nitrogen and can intermittently use 4～8 hours, can treat tens of routine patients, and or else the patient needs frequent filling liquid nitrogen therebetween.Therefore, avoid the waste of liquid nitrogen, saved a large amount of labours and time, reduced medical cost; 6, simple in structure, operation is dexterous convenient: the patient only need screw off bottle cap before using, directly in reservoir, cover tight bottle cap again behind the filling liquid nitrogen, selection installs suitable freezing head, just carried out the preceding preparation of art, the patient only need hold with the right hand and lift reservoir during use, hooks pull bar with forefinger at any time, and liquid nitrogen just can spray to freezing head with big pressure moment, make freezing fast cooling, just can begin focus is carried out cold therapy.Releasing lever, freezing head stop refrigeration and energy rapid and natural thawing rewarming, and finish the course of treatment.When reusing, the patient need not do other any preparation again, extract the reservoir leave standstill and just can proceed treatment work, during operation the patient can tilt arbitrarily bottle, change the treatment angle, therefore operation is very dexterous convenient.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is the attached view of structure shown in Figure 1.

Below in conjunction with accompanying drawing this utility model is further described.

Embodiment.Referring to Fig. 1, Fig. 2, hand-held pressure accumulation type liquid nitrogen cryotherapy device of the present utility model is by reservoir (1), bottle cap (2), playpipe (3), freezing head (4), normally closed injection valve (5), safety check valve (6), manually vent valve (7) is formed, reservoir adopts the stainless steel cylinder of vacuum insulation, bottleneck connects the threaded connector (8) that pyrite is made, threaded connector again with bottle cap (2) by being threaded, between bottle cap (2) inner surface and threaded connector upper surface, be provided with foam rubber sealing circle (9), on bottle cap (2), be provided with normally closed injection valve (5), safety check valve (6), manual vent valve (7), normally closed injection valve (5) departs from bottle cap (2) center and is provided with, so that the open degree that pull bar (15) can be regulated injection valve, safety check valve (16) adopts the spring steel ball structure, so that when pressure is excessive, can discharge the gas decompression automatically, ensure safety, manually vent valve (7) adopts the awl structure, play artificial regulating action, normally closed injection valve (5) is by valve seat (10), vertex of a cone valve rod (11), spring (12), supporting seat (13), bracing ring (14), pull bar (15) is formed, playpipe (3) and freezing component (4) are threaded with the lateral liquid outlet of valve seat (10), and it is vertical mutually, tube for transfusion (17) in the reservoir is connected with valve seat (10) bottom inlet, supporting seat (13) is used the upper end that is threaded in valve seat (10), bracing ring (14) is set above the supporting seat (13), vertex of a cone valve rod (11) is arranged in the endoporus of valve seat (10), spring (12) is enclosed within the thin cervical region of its upper end, pull bar (15) is made the bending-like of 120 ° of angles, and bracing ring (14) forms lever construction, and be connected with vertex of a cone valve rod (11) by pin (17), vertex of a cone valve rod (11) can move up and down under the effect of pull bar (15), in order to the opening and closing jet, because pull bar (15) can rotate around vertex of a cone valve rod (11), and be provided with because valve body (10) is eccentric, when pull bar (15) rotates, in different positions, stroke is different, therefore, the height that cone valve rod (11) promotes is just different, so just can control the open degree of injection valve.

Claims (6)

1, a kind of hand-held pressure accumulation type liquid nitrogen cryotherapy device, comprise reservoir [1], bottle cap [2], playpipe [3], freezing head [4], it is characterized in that bottle cap is provided with the normally closed injection valve of rod-pulling type [5], safety check valve [6] and manual vent valve [7], bottle cap is connected by threaded connector (8) with reservoir, between bottle cap and the threaded connector upper surface, be provided with foam rubber sealing circle [9], playpipe [3] is threaded with normally closed injection valve [5].

2, hand-held pressure accumulation type liquid nitrogen cryotherapy device according to claim 1, it is characterized in that normally closed injection valve [5] is made up of valve seat [10], vertex of a cone valve rod [11], spring [12], supporting seat [13], bracing ring [14], pull bar [15], be connected with pin [16] between the upper end of pull bar and vertex of a cone valve rod, vertex of a cone valve rod is arranged in the endoporus of valve seat, supporting seat is used the upper end that is threaded in valve seat, and spring housing is at the thin cervical region in the upper end of vertex of a cone valve rod.

3,, it is characterized in that normally closed injection valve departs from the bottle cap center and is provided with according to claim 1 or 2 described hand-held pressure accumulation type liquid nitrogen cryotherapy devices.

4, according to claim 1 or 3 described hand-held pressure accumulation type liquid nitrogen cryotherapy devices, it is characterized in that the angle of pull bar is 100-120 °.

5, hand-held pressure accumulation type liquid nitrogen cryotherapy device according to claim 1 and 2 is characterized in that reservoir [1] adopts the stainless-steel vacuum dewar bottle to make.

6, hand-held pressure accumulation type liquid nitrogen cryotherapy device according to claim 1 and 2 is characterized in that safety check valve adopts the steel ball spring structure.

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