1. The positive pressure protection structure for preventing the frost of the cryogenic equipment is characterized by comprising a protection cover (1) and a blow-off pipe (2), wherein the blow-off pipe (2) comprises a connecting pipe nozzle (201), a fixing plate (202) and an annular pipe (203);

the annular pipe (203) is an annular pipe with an opening, so that the low-temperature equipment interface can be conveniently embraced; the gas injection holes (204) are arranged in the circumferential direction, the fixing plate (202) is further arranged in the circumferential direction of the annular pipe (203), one end of the fixing plate (202) is connected to the annular pipe (203), and the other end of the fixing plate is used for being fixedly connected to low-temperature equipment; one end of the filler neck (201) is connected to the annular pipe (203) and is communicated with the inner space of the annular pipe (203), and the other end of the filler neck penetrates through the leading-out hole of the protective cover (1) and is connected with an air source;

protection casing (1) is including being used for holding the disc of annular pipe (203) to and the handrail dish of both sides, open at the lateral part of disc has the hole of drawing forth of filler neck (201), protection casing (1) divide into the part of two symmetries, and the kneck is equipped with the screw, makes things convenient for two protection casing (1) cover back on the low temperature equipment interface, with the screw with two protection casing (1) fixed connection is in the same place.

2. The positive pressure protection structure for frost prevention of cryogenic equipment according to claim 1, wherein if liquid oxygen is transported in the cryogenic equipment, the positive pressure protection structure is continuously blown off by nitrogen or helium, so that a local positive pressure environment is formed in the protection cover (1).

3. The positive pressure protection structure for frost prevention of cryogenic equipment according to claim 1, wherein if liquid hydrogen is transported in the cryogenic equipment, the positive pressure protection structure is continuously blown off by helium gas, so that a local positive pressure environment is formed in the protection cover (1).

4. The positive pressure protection structure for the frost prevention of a cryogenic apparatus according to claim 1, wherein the protection cover (1) is formed by 3D printing of a transparent photosensitive resin.

5. The positive pressure protection structure for frost prevention of cryogenic equipment according to claim 1, wherein the structural state of the protection cover (1) is adaptively designed to be a round, square or multi-piece splicing molding according to different structural states of the appearance of the cryogenic equipment.

6. The positive pressure shielding structure for frost prevention of a cryogenic apparatus according to claim 1, wherein a plurality of blow-off pipes (2) are provided for a spatially large portion.

7. The positive pressure shielding structure for preventing the frost of a cryogenic apparatus according to claim 1, wherein the annular pipe (203) is made of metal and is not detached after being fixed to the cryogenic apparatus by the fixing plate (202).

8. The positive pressure protection structure for preventing the frost of a cryogenic device according to claim 1, wherein the fixing plate (202) is fixedly connected with the cryogenic device by a screw connection or a welding connection.

9. The positive pressure protection structure for frost prevention of cryogenic equipment according to claim 1 or 9, wherein the number of the fixing plates (202) is 4, and the fixing plates are uniformly arranged in a circumferential direction.

10. The positive pressure protection structure for the frost prevention of a cryogenic device according to claim 1, wherein the diameter of the outlet hole at the side of the disc matches the diameter of the filler neck (201) for the filler neck (201) to just pass through.

Background

In the filling and transferring processes of low-temperature media such as liquid hydrogen, liquid oxygen, liquid nitrogen, LNG and the like, a low-temperature liquid path system and a low-temperature gas supply system relate to a large amount of connection interface equipment, and because the interface part of the low-temperature equipment is frequently disassembled and heat insulation measures are not convenient to take, the icing and frosting phenomena are easy to occur under the low-temperature working condition, and the separation reliability of the equipment is influenced.

At present, the anti-icing measures are mainly to ensure the separation performance by means of manual defrosting of operators before the separation of the equipment. The manual defrosting measures limit the service performance of the low-temperature equipment, so that the low-temperature equipment cannot have the zero-second separation and unattended function.

Disclosure of Invention

Technical problem to be solved

The invention provides a positive pressure protection structure for preventing frost of low-temperature equipment, and aims to solve the technical problem.

(II) technical scheme

In order to solve the technical problem, the invention provides a positive pressure protection structure for preventing frost of low-temperature equipment, which comprises a protection cover (1) and a blow-off pipe (2), wherein the blow-off pipe (2) comprises a connecting pipe nozzle (201), a fixing plate (202) and an annular pipe (203);

the annular pipe (203) is an annular pipe with an opening, so that the low-temperature equipment interface can be conveniently embraced; the gas injection holes (204) are arranged in the circumferential direction, the fixing plate (202) is further arranged in the circumferential direction of the annular pipe (203), one end of the fixing plate (202) is connected to the annular pipe (203), and the other end of the fixing plate is used for being fixedly connected to low-temperature equipment; one end of the filler neck (201) is connected to the annular pipe (203) and is communicated with the inner space of the annular pipe (203), and the other end of the filler neck penetrates through the leading-out hole of the protective cover (1) and is connected with an air source;

protection casing (1) is including being used for holding the disc of annular pipe (203) to and the handrail dish of both sides, open at the lateral part of disc has the hole of drawing forth of filler neck (201), protection casing (1) divide into the part of two symmetries, and the kneck is equipped with the screw, makes things convenient for two protection casing (1) cover back on the low temperature equipment interface, with the screw with two protection casing (1) fixed connection is in the same place.

Further, if liquid oxygen is transmitted in the low-temperature equipment, the positive pressure protection structure is continuously blown by nitrogen or helium, so that a local positive pressure environment is formed in the protection cover (1).

Further, if liquid hydrogen is transmitted in the low-temperature equipment, the positive pressure protection structure is continuously blown off by helium gas, so that a local positive pressure environment is formed in the protection cover (1).

Further, the protective cover (1) is formed by 3D printing of transparent photosensitive resin.

Further, the structural state of the protective cover (1) is adaptively designed to be formed by splicing a circle, a square or multiple pieces according to the structural states of different low-temperature equipment shapes.

Furthermore, a plurality of blow-off pipes (2) are arranged at the position with larger space.

Further, the annular pipe (203) is made of metal and is not detached after being fixed on the low-temperature equipment through the fixing plate (202).

Further, the fixing plate (202) is fixedly connected with the cryogenic equipment through a screwing or welding mode.

Furthermore, the number of the fixing plates (202) is 4, and the fixing plates are uniformly arranged in the circumferential direction.

Further, the diameter of the outlet hole on the side of the disc is matched with that of the filler neck (201) for the filler neck (201) to just pass through.

(III) advantageous effects

The invention provides a positive pressure protection structure for preventing frost of low-temperature equipment.

This malleation protective structure utilizes the protection casing that 3D printed to form local little closed chamber at interface position, utilizes the fumarole of blowing pipe circumference equipartition to form the malleation environment of local nitrogen gas or helium medium at interface position, has completely cut off the moisture in the external environment effectively to start the anti-icing effect. The invention solves the problem that the interface part of the low-temperature equipment is easy to freeze and frost, improves the separation reliability of the low-temperature equipment, reduces the operation of personnel, and enables the corresponding low-temperature equipment to have the capabilities of unattended operation and zero-second separation. Through the verification test under the liquid nitrogen working condition, this malleation protective structure effect is better, has effectually played the anti-icing effect, and simple structure is compact, and adaptability is good.

Drawings

FIG. 1 is a structural diagram of a positive pressure protection structure of the present invention, in which the components of the positive pressure protection structure, the names of the components, and the typical implementation are specified;

FIG. 2 is a view of the structure of the blow-off pipe, in which the overall configuration of the blow-off pipe structure and the names and assembly relationships of the components are specified;

fig. 3 is a sectional view of the positive pressure shielding structure in use, which shows the connection form between the positive pressure shielding structure and the cryogenic equipment.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The technology is applied to the connection interface equipment of a low-temperature working condition filling system and a gas supply system for frost prevention, and can also be applied to electrical equipment for explosion prevention.

The invention aims to provide an anti-icing protective structure which is simple in structure under low-temperature working conditions and can be suitable for zero-second separation and unattended technology.

This malleation protective structure can form relatively confined little space at the interface position through setting up protection casing, blowdown pipe, supplies gases such as nitrogen gas or helium to form the malleation environment that has the inert gas protection in the protection casing through the blowdown pipe, prevents that vapor from getting into the interface position in the outside air to play the effect of anti-icing frost.

And in the working process, continuously blowing off, if liquid oxygen is transmitted in the low-temperature equipment, continuously blowing off the positive pressure protection structure by using nitrogen or helium to form a local positive pressure environment in the protection cover. Nitrogen is generally selected because of its abundant resources. If liquid hydrogen is transmitted in the low-temperature equipment, the positive pressure protection structure is continuously blown off by helium gas, so that a local positive pressure environment is formed in the protection cover.

The positive pressure protection structure is shown in the attached figure 1 and comprises a protection cover 1 and a blow-off pipe 2.

The protective cover 1 is formed by 3D printing of transparent photosensitive resin, has good adaptability and is fixed on low-temperature interface equipment;

the annular pipe 203 of the blowing pipe 2 is provided with a plurality of air injection holes 204 in the circumferential direction, so that the air pressure in a small closed space in the protective cover is relatively uniform when protective air is supplied, and the positive pressure protection effect is convenient to realize;

the structural state of the protective cover 1 can be adaptively designed into a round shape, a square shape and the like according to the appearance structural state of different low-temperature equipment, and can also be formed by splicing a plurality of pieces;

the appearance state of the blowing pipe 2 can be adaptively designed according to the appearance structure states of different low-temperature equipment, such as a ring shape, an opening shape and the like, and a plurality of blowing pipes can be arranged at the position with larger space.

This malleation protective structure utilizes the protection casing that 3D printed to form local little closed chamber at interface position, utilizes the fumarole of blowing pipe circumference equipartition to form the malleation environment of local nitrogen gas or helium medium at interface position, has completely cut off the moisture in the external environment effectively to start the anti-icing effect. The invention solves the problem that the interface part of the low-temperature equipment is easy to freeze and frost, improves the separation reliability of the low-temperature equipment, reduces the operation of personnel, and enables the corresponding low-temperature equipment to have the capabilities of unattended operation and zero-second separation. Through the verification test under the liquid nitrogen working condition, this malleation protective structure effect is better, has effectually played the anti-icing effect, and simple structure is compact, and adaptability is good.

Fig. 1 is a structural diagram of a positive pressure protection structure, in which the components, the names of the components and the typical implementation of the positive pressure protection structure are specified. Wherein, 1-protective cover 2-blow off pipe.

FIG. 2 is a drawing showing a structure of a blow-off pipe, in which the overall configuration of the blow-off pipe structure and the names and assembling relationships of the components are specified. 201, filler neck 202, fixing plate 203, annular tube 204 and gas injection hole.

Fig. 3 is a sectional view showing the use state of the positive pressure protection structure, and the connection form of the positive pressure protection structure and the cryogenic equipment is clearly shown in the drawing. Wherein, 1-protective cover 2-blow off pipe 3-cryogenic facilities I4-cryogenic facilities II.

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

A positive pressure protection structure for preventing frost of low-temperature equipment is structurally shown in figures 1 to 2 and comprises a protective cover 1 and a blow-off pipe 2, wherein the blow-off pipe 2 comprises a filler neck 201, a fixing plate 202 and an annular pipe 203.

The annular tube 203 is an annular tube with an opening to facilitate encircling the device interface. The gas injection holes 204 are arranged in the circumferential direction, a fixing plate 202 is further arranged in the circumferential direction of the annular tube 203, one end of the fixing plate 202 is connected to the annular tube 203, and the other end of the fixing plate 202 is used for being fixedly connected to low-temperature equipment. One end of the filler neck 201 is connected to the annular pipe 203 and is communicated with the inner space of the annular pipe 203, and the other end of the filler neck penetrates through the outlet hole of the protective cover 1 and is connected with an air source. The ring pipe 203 is a metal product and is generally not disassembled after being fixed on the cryogenic equipment by the fixing plate 202.

The protective cover 1 comprises a circular disc for accommodating the annular pipe 203 and handrail discs on two sides, wherein the side part of the circular disc is provided with an outlet hole of the filler neck 201, the outlet hole is just matched with the diameter of the filler neck 201, and the filler neck 201 just passes through the outlet hole. The protective cover 1 is divided into two symmetrical parts, and screw holes are formed in the interface, so that the two protective covers 1 are conveniently and fixedly connected together by screws after the two protective covers 1 cover the interface of the low-temperature equipment.

The structure diagram of the positive pressure protection structure is shown in the attached drawing 1, the using state is shown in the attached drawing 3, the fixing plate 202 of the blow-off pipe 2 is fixedly connected with the low-temperature equipment I3 in a screwing or welding mode, the protective cover 1 is fixedly connected with the low-temperature equipment I in a screwing mode and covers the blow-off pipe 2 and the interface parts of the low-temperature equipment I and the low-temperature equipment II, the protective cover 1 and the blow-off pipe 2 can be correspondingly adjusted through the appearance structure state of the low-temperature equipment, and the pipe connecting port 201 of the blow-off pipe 2 penetrates through the protective cover to be connected with a gas supply system pipeline.

Further, the number of the fixing plates 202 is generally 4, and they are uniformly arranged in the circumferential direction.

Furthermore, two or more screw holes are arranged on the protective cover 1, so that the protective cover is conveniently and fixedly connected with the low-temperature equipment I in a threaded connection mode.

The working process of the invention is as follows: the protective cover 1 is connected with the low-temperature equipment I in a threaded connection mode, and a small closed cavity is formed at the interface part of the low-temperature equipment I and the low-temperature equipment II. Blow off pipe 2 and be connected with low temperature equipment I through spiro union or welding form, arrange inside protection casing 1, encircle the equipment interface, the fumarole 204 that gas was arranged through annular pipe 203 circumferencial direction sprays at interface position department, forms local malleation environment, prevents that outside moisture from getting into interface position and forming the frost. The appearance structure of the protective cover I and the blowing pipe 2 can be adjusted according to actual working conditions, and the applicability is wide.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.