Ultra-low temperature liquid filling device

Abstract

The present application discloses a device for filling ultra-low temperature liquid, comprising an inner sleeve and a first sleeve sleeved outside the inner sleeve, the inner sleeve comprising a first liquid-filling pipe, a first bellows, a second liquid-filling pipe and a second bellows which are fixedly connected in sequence from right to left, a first annular boss is arranged in the first liquid-filling pipe, a tail joint is fixed at the right end of the first liquid-filling pipe, a valve plug is abutted at the right end end of the first annular boss, a valve plug seat is fixed on the right end surface of the valve plug, the right end of the valve plug seat is slidably connected to the inner wall of the tail joint, a first spring is abutted against the valve plug seat and the tail joint, an intermediate flow channel is arranged in the valve plug seat, a sealing ring is fixed on the inner wall of the second liquid-filling pipe, a push rod which penetrates the valve plug and extends into the second bellows is connected at the left end of the valve plug seat, and an impurity flow channel is clamped between the first sleeve and the inner sleeve. The filling device realizes the discharge of impurities in advance during the filling process through the coordination of various structures, thereby ensuring the quality of liquid filling and achieving better effect.

Description

Technical Field

[0001] The present application relates to the field of ultra-low temperature liquid filling, and in particular to an ultra-low temperature liquid filling device. Background Art

[0002] The filling device is a carrier that realizes reliable connection between the liquid filling machine and the vehicle-mounted filling port and the cylinder, and is used to control the flow of the filled medium to the vehicle-mounted cylinder.

[0003] In the prior art, since ultra-low temperature liquid is filled, frost or ice is easily generated in the inner sleeve during the filling process, making it difficult to pull out the filling gun and plugging it in and out; and there is no buffer during the plugging and pulling process, which can easily cause damage to the internal components of the filling device and affect practicality; before filling, there is impurity gas in the original cylinder, which, if not discharged, will affect the filling accuracy and filling effect. Summary of the invention

[0004] The purpose of the present invention is to provide a super-low temperature liquid filling device to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The embodiment of the present application discloses a super-low temperature liquid filling device, characterized in that it includes an inner sleeve and a first sleeve sleeved outside the inner sleeve, the inner sleeve includes a first liquid filling pipe, a first bellows, a second liquid filling pipe and a second bellows fixedly connected in sequence from right to left, a first annular boss is provided in the first liquid filling pipe, a tail joint is fixed to the right end of the first liquid filling pipe, a valve plug is abutted at the right end end of the first annular boss, a valve plug seat is fixed on the right end surface of the valve plug, the right end of the valve plug seat is slidably connected to the inner wall of the tail joint, and a second annular boss is convexly provided on the valve plug seat The valve plug seat has an inner surface which is connected to the valve plug, and an inner surface which is connected to the valve plug of the inner casing is connected to the outer surface of the valve plug. The valve plug seat has an inner surface which is connected to the valve plug and the outer surface of the valve plug is connected to the inner casing.

[0007] As a further improvement of the present invention, a limiting sleeve sleeved on the push rod is arranged inside the sealing ring, and the limiting sleeve is connected to the sealing ring through a connecting rib.

[0008] As a further improvement of the present invention, a sealing sleeve is threadedly connected to the inner circumference of the first annular boss, and an annular flange is provided on the left end of the sealing sleeve. The annular flange abuts against the second spring, and a sealing gasket is clamped between the annular flange and the end surface facing the first annular boss.

[0009] As a further improvement of the present invention, a third annular boss is protrudingly provided on the inner wall of the second liquid adding pipe, and the right end of the sealing ring abuts against the third annular boss.

[0010] As a further improvement of the present invention, a second sleeve is sandwiched between the first sleeve and the inner sleeve, a third sleeve is arranged outside the first sleeve, a first vacuum layer is sandwiched between the first sleeve and the third sleeve, a second vacuum layer is sandwiched between the inner sleeve and the second sleeve, the first vacuum layer is connected to the second vacuum layer, a vacuum port is provided on the third sleeve, and an impurity flow channel is formed between the first sleeve and the second sleeve.

[0011] As a further improvement of the present invention, the two ends of the third sleeve are tightly connected to the two ends of the first sleeve to form a first vacuum layer, the left end of the second sleeve is tightly connected to the left end of the inner sleeve to form a second vacuum layer, a first annular rib is convexly provided on the inner wall of the first sleeve and is tightly connected to the right end of the second sleeve, an opening connecting the first vacuum layer and the second vacuum layer is provided on the first sleeve on the right side of the first annular rib, and the right end of the first sleeve is tightly connected to the right end of the inner sleeve.

[0012] As a further improvement of the present invention, the inner wall of the first sleeve is connected to the outer wall of the second sleeve through a second annular rib, the inner wall of the second sleeve is connected to the outer wall of the inner sleeve through a third annular rib, and a plurality of air holes are provided on the second annular rib and the third annular rib.

[0013] As a further improvement of the present invention, the push rod is threadedly connected to the valve plug and the valve plug seat, and a limiting boss is convexly provided on the push rod.

[0014] As a further improvement of the present invention, a connecting thread is provided on the outer wall of the tail joint.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] 1. After the push rod is squeezed, the valve plug moves toward the tail joint. Due to pressure reasons, the impurity gas flows from the middle flow channel and the gap between the first annular boss and the valve plug through the inner sleeve to the impurity flow channel for discharge, thereby ensuring the quality of liquid addition and achieving better results.

[0017] 2. By setting the bellows at both ends, a buffer section is formed to avoid damage to the sealing ring when the external liquid adding mechanism and the filling device are squeezed and connected, which is convenient for buffering and avoids damage to parts.

[0018] 3. Set up double vacuum layers inside and outside to achieve heat insulation from the outside, avoid frost or ice in the inner casing, and ensure long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 Shown is a schematic structural diagram of a super-low temperature liquid filling device in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 In one embodiment, a cryogenic liquid filling device comprises an inner sleeve 1 and a first sleeve 2 sleeved outside the inner sleeve 1, the inner sleeve 1 comprises a first liquid adding pipe 101, a first bellows 102, a second liquid adding pipe 103 and a second bellows 104 which are fixedly connected in sequence from right to left, a first annular boss 105 is arranged in the first liquid adding pipe 101, a tail joint 3 is fixed to the right end of the first liquid adding pipe 101, a valve plug 4 is abutted at the right end thereof, a valve plug seat 5 is fixed on the right end surface of the valve plug 4, the right end of the valve plug seat 5 is slidably connected to the inner wall of the tail joint 3, a second annular boss 501 is convexly arranged on the valve plug seat 5, and the second annular boss 501 is convexly arranged on the valve plug seat 5. The first spring 6 mounted on the valve plug seat 5 is abutted on the end surface of the annular boss 501 facing the tail joint 3, and an intermediate flow channel 502 connecting the first liquid adding pipe 101 and the tail joint 3 is provided in the valve plug seat 5. A sealing ring 106 is fixed on the inner wall of the second liquid adding pipe 103, and a second spring 7 is abutted on the end surface of the sealing ring 106 facing the first annular boss 105. The left end of the valve plug seat 5 is connected to a push rod 8 that penetrates the valve plug 4 and extends into the second bellows 104. An impurity flow channel 9 is clamped between the first sleeve 2 and the inner sleeve 1. The inlet of the impurity flow channel 9 is connected to the second bellows 104, and the outlet of the impurity flow channel 9 is connected to the pressure relief conduit 10.

[0023] Furthermore, a limiting sleeve 11 sleeved on the ejector rod 8 is provided inside the sealing ring 106 , and the limiting sleeve 11 is connected to the sealing ring 106 via a connecting rib 12 to prevent the ejector rod from being misplaced, thereby enabling rapid connection with an external filling mechanism.

[0024] Furthermore, a sealing sleeve 24 is threadedly connected to the inner circumference of the first annular boss 105, and an annular flange 2401 is provided at the left end of the sealing sleeve 24. The annular flange 2401 abuts against the second spring 7 to increase the sealing performance, and a sealing gasket 25 is clamped between the annular flange 2401 and the end surface facing the first annular boss 105.

[0025] Furthermore, a third annular boss 13 is convexly provided on the inner wall of the second liquid filling pipe 103, and the right end of the sealing ring 106 abuts against the third annular boss 13. The third annular boss limits the sealing ring, which facilitates the squeezing of the sealing ring, thereby ensuring the sealing effect during the filling process.

[0026] In this technical solution, after the push rod is squeezed, the valve plug is moved toward the tail joint. Due to pressure reasons, the impurity gas flows from the middle flow channel and the gap between the first annular boss and the valve plug through the inner sleeve to the impurity flow channel for discharge, thereby ensuring the quality of liquid addition and achieving better results. By setting the bellows at both ends, a buffer section is formed, thereby avoiding damage to the sealing ring when the external liquid addition mechanism and the filling device are squeezed and connected, facilitating buffering and avoiding damage to components.

[0027] In one embodiment, a second sleeve 14 is sandwiched between the first sleeve 2 and the inner sleeve 1, a third sleeve 15 is disposed outside the first sleeve 2, a first vacuum layer 16 is sandwiched between the first sleeve 2 and the third sleeve 15, a second vacuum layer 17 is sandwiched between the inner sleeve 1 and the second sleeve 14, the first vacuum layer 16 is communicated with the second vacuum layer 17, a vacuum port 18 is disposed on the third sleeve 15, and an impurity flow channel 9 is formed between the first sleeve 2 and the second sleeve 14.

[0028] Furthermore, both ends of the third sleeve 15 are tightly connected to both ends of the first sleeve 2 to form a first vacuum layer 16, the left end of the second sleeve 14 is tightly connected to the left end of the inner sleeve 1 to form a second vacuum layer 17, and a first annular rib 23 tightly connected to the right end of the second sleeve 14 is convexly provided on the inner wall of the first sleeve 2, and an opening 19 connecting the first vacuum layer 16 and the second vacuum layer 17 is provided on the first sleeve 2 on the right side of the first annular rib 23, and the right end of the first sleeve 2 is tightly connected to the right end of the inner sleeve 1.

[0029] Furthermore, the inner wall of the first sleeve 2 is connected to the outer wall of the second sleeve 14 through the second annular rib 20, and the inner wall of the second sleeve 14 is connected to the outer wall of the inner sleeve 1 through the third annular rib 21. A plurality of air holes 22 are provided on the second annular rib 20 and the third annular rib 21.

[0030] In this technical solution, double vacuum layers are provided inside and outside to achieve heat insulation from the outside, avoid frost or ice formation in the inner sleeve, and ensure long-term use.

[0031] In one embodiment, the push rod 8 is threadedly connected to the valve plug 4 and the valve plug seat 5 , and a limiting boss is protruded from the push rod 8 .

[0032] In this technical solution, a detachable connection is achieved by means of a threaded connection, which is convenient for maintenance and repair.

[0033] In one embodiment, a connecting thread 301 is provided on the outer wall of the tail connector 3 .

[0034] In this technical solution, the connection can be easily disassembled.

[0035] Specific implementation principle:

[0036] During filling, the external filling mechanism is inserted into the inner tube to drive the push rod to move, and the push rod drives the valve plug to slide the valve plug seat into the tail joint, creating a gap between the valve plug and the first annular boss. Due to air pressure, impurity gas enters the impurity flow channel in the opposite direction along the tail joint, the gap between the valve plug and the first annular boss, the second sleeve, the gap between the connecting ribs and the bellows for discharge. After the discharge is completed, the external filling mechanism is squeezed inward and abuts against the sealing ring to achieve sealing. At this time, driven by the reaction force of the two springs and the bellows, the push rod will reversely push open the injection valve in the external filling mechanism, and the liquid will flow in through the inner sleeve and the tail joint to achieve filling.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication 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.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for filling ultra-low temperature liquid, characterized in that: The valve body of the embodiment of the present invention is a valve body with a first end cap, a second end cap and a second end cap being fixedly connected to each other from the first end cap to the second end cap. A sealing ring, wherein the end surface of the sealing ring facing the first annular boss is abutted with a second spring, the left end of the valve plug seat is connected to a push rod that penetrates the valve plug and extends into the second bellows, an impurity flow channel is clamped between the first sleeve and the inner sleeve, the inlet of the impurity flow channel is communicated with the second bellows, the outlet of the impurity flow channel is connected with the pressure relief conduit, a second sleeve is clamped between the first sleeve and the inner sleeve, a third sleeve is arranged outside the first sleeve, a first vacuum layer is clamped between the first sleeve and the third sleeve, a second vacuum layer is clamped between the inner sleeve and the second sleeve, the first vacuum layer is communicated with the second vacuum layer, a vacuum port is arranged on the third sleeve, and an impurity flow channel is formed between the first sleeve and the second sleeve.

2. The ultra-low temperature liquid filling device according to claim 1, characterized in that: A limiting sleeve sleeved on the top rod is arranged inside the sealing ring, and the limiting sleeve is connected to the sealing ring through a connecting rib.

3. The ultra-low temperature liquid filling device according to claim 1, characterized in that: A sealing sleeve is threadedly connected to the inner circumference of the first annular boss, and an annular flange is provided at the left end of the sealing sleeve. The annular flange abuts against the second spring, and a sealing gasket is clamped between the annular flange and the end surface facing the first annular boss.

4. The ultra-low temperature liquid filling device according to claim 1, characterized in that: A third annular boss is protrudingly provided on the inner wall of the second liquid adding pipe, and the right end of the sealing ring abuts against the third annular boss.

5. The ultra-low temperature liquid filling device according to claim 1, characterized in that: The two ends of the third sleeve are tightly connected to the two ends of the first sleeve to form a first vacuum layer, the left end of the second sleeve is tightly connected to the left end of the inner sleeve to form a second vacuum layer, a first annular rib tightly connected to the right end of the second sleeve is convexly provided on the inner wall of the first sleeve, an opening connecting the first vacuum layer and the second vacuum layer is provided on the first sleeve on the right side of the first annular rib, and the right end of the first sleeve is tightly connected to the right end of the inner sleeve.

6. The ultra-low temperature liquid filling device according to claim 5, characterized in that: The inner wall of the first sleeve is connected to the outer wall of the second sleeve through the second annular rib, the inner wall of the second sleeve is connected to the outer wall of the inner sleeve through the third annular rib, and a plurality of air holes are provided on the second annular rib and the third annular rib.

7. The ultra-low temperature liquid filling device according to claim 1, characterized in that: The push rod is threadedly connected with the valve plug and the valve plug seat, and a limiting boss is convexly provided on the push rod.

8. The ultra-low temperature liquid filling device according to claim 1, characterized in that: A connecting thread is arranged on the outer wall of the tail joint.

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