A liquid charge device

Abstract

The application relates to a liquid working medium filling device, belonging to the technical field of filling equipment, and solves the problem that a piston is prone to tilting during the filling process of the prior art, leading to rubber ring abrasion, deformation and falling. The liquid working medium filling device comprises a filling cylinder, a piston and a filling cylinder fixing seat; the piston is arranged in the filling cylinder and can reciprocate along the inner wall of the filling cylinder; the filling cylinder is detachably arranged on the filling cylinder fixing seat, so that the filling cylinder can be positioned on the filling cylinder fixing seat to perform the liquid working medium filling operation. The application can ensure the parallelism between the piston and the cylinder bottom during the liquid working medium filling process, thereby avoiding the problems of rubber ring abrasion, deformation and falling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filling equipment, in particular to a liquid working medium filling device. BACKGROUND

[0002] In the space life support system, liquid working medium is injected into the system to make the system work normally. As a consumable, the liquid working medium needs to be constantly replenished. As a ground support personnel, it is necessary to produce a barrel product filled with liquid working medium so as to transport it to the space station.

[0003] The ground support personnel generally fills the liquid working medium into a filling barrel, and then sends the filling barrel filled with the liquid working medium to space through a rocket spaceship.

[0004] In the production process, when the liquid working medium filling device in the prior art fills the liquid working medium into the filling barrel, the piston will tilt due to the lack of guidance, causing dry friction between the piston and the filling cylinder, and causing the piston and the filling cylinder to be worn and deformed. In severe cases, the circumferential compression of the sealing ring on the piston is uneven, the local compression rate of the sealing ring is too large, the sealing ring material falls off, and excess material is introduced into the inside of the filling barrel. SUMMARY

[0005] In view of the above analysis, the present application aims to provide a liquid working medium filling device to solve the problem of easy tilting of the piston in the filling process of the prior art, which leads to easy deformation and shedding of the rubber ring.

[0006] The main purpose of the present application is achieved by the following technical solutions:

[0007] A liquid working medium filling device, comprising a filling cylinder, a piston and a filling cylinder fixing seat; the piston is arranged in the filling cylinder, and the piston can reciprocate along the inner wall of the filling cylinder; the filling cylinder is detachably mounted on the filling cylinder fixing seat, so that the filling cylinder can be positioned by the filling cylinder fixing seat to perform liquid working medium filling operation.

[0008] Further, the filling cylinder comprises a filling channel; the filling channel is protrusively arranged at the bottom of the filling cylinder.

[0009] Further, the filling cylinder further comprises a disconnecting device; the disconnecting device is connected with the filling channel.

[0010] Further, the filling cylinder fixing seat comprises an arc-shaped wall, a top support table and a bottom mounting table.

[0011] Further, the top support table and the bottom mounting table are arranged in parallel, and the arc-shaped wall is arranged perpendicularly to the top support table and the bottom mounting table.

[0012] Further, the bottom mounting table is provided with a U-shaped opening capable of accommodating the filling channel.

[0013] Further, the filling cylinder fixing seat further comprises a scale pin; the scale pin is arranged on the top supporting table.

[0014] Further, the piston comprises a sealing rubber ring.

[0015] Further, a cushion block is further included; the cushion block is arranged on the piston.

[0016] Further, a top cushion block is further included; the top cushion block is arranged on the cushion block.

[0017] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0018] (1) The liquid working medium filling device comprises a filling cylinder, a piston and a filling cylinder fixing seat, the piston is arranged in the filling cylinder, the piston can reciprocate along the inner wall of the filling cylinder; the filling cylinder is detachably mounted in the filling cylinder, so that the filling cylinder can be precisely filled with liquid working medium under the positioning of the fixing seat. The liquid working medium is injected from the bottom of the filling cylinder into the filling cylinder, and the liquid working medium injected into the filling cylinder can drive the piston to slide upwards. This kind of filling device makes the liquid injection not mixed with any impurities, and at the same time, this kind of injection method can avoid the shaking of the liquid working medium and keep its stability.

[0019] (2) The piston, the cushion block and the top cushion block are arranged in the filling cylinder from bottom to top, wherein the cushion block is provided with a plurality of cushion blocks, and the plurality of cushion blocks and the top cushion block are arranged on the piston in parallel. The diameters of the cushion block and the top cushion block are coaxial with the piston, and the diameters of the cushion block and the top cushion block are parallel to each other. The cushion block arranged on the piston is tightly combined with the upper surface of the piston, and the plurality of cushion blocks can exert a vertical downward pressure on the piston perpendicular to the bottom of the filling cylinder. The pressure of the cushion block on the piston can guide the movement of the piston in the filling cylinder, ensure the coaxiality of the piston and the filling cylinder, ensure the parallelism of the piston and the bottom surface of the filling cylinder, and avoid the inclination of the piston.

[0020] (3) The cushion block is slightly smaller than the inner diameter of the filling cylinder and slightly larger than the diameter of the piston, which makes the cushion block have a guiding effect on the movement direction of the piston in the filling cylinder, ensures the coaxiality between the cushion block and the filling cylinder, and further ensures the coaxiality between the piston cylindrical surface and the filling cylinder cylindrical surface due to the close combination of the upper surface of the piston and the lower surface of the cushion block, so that the cushion block has a further guiding effect on the movement direction of the piston in the filling cylinder, which ensures the parallelism between the piston and the bottom surface of the filling cylinder and the cushion block, avoids the inclination of the piston in the filling cylinder, and causes the friction between the piston and the filling cylinder to generate abrasive dust. At the same time, the guiding effect reduces the probability of wear and deformation of the sealing rubber ring, avoids the excessive compression rate of the sealing ring, avoids the problem of wear and shedding of the sealing rubber ring during the upward movement of the piston, thereby avoiding the entry of the shed material into the filling cylinder during the filling process, and introducing excess material.

[0021] (4) The upper surface of the top cushion block is in contact with the lower surface of the top support table, so that the liquid working medium cannot continue to be injected into the filling cylinder, i.e., the injection is completed, so that the amount of liquid in the filling cylinder reaches a quantitative effect, facilitating batch production.

[0022] In the present application, the above-mentioned technical solutions can be combined with each other to realize more preferred combination schemes. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or by implementing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the embodiments, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain the principles of the application, and should not be considered limiting of the present application in scope, as numerous embodiments can be made of the application.

[0024] Figure 1 is a sectional view of the liquid working medium filling device before filling of the present application;

[0025] Figure 2 is a closed state diagram of the disconnecting device of the liquid working medium filling device of the present application;

[0026] Figure 3 is an open state diagram of the disconnecting device of the liquid working medium filling device of the present application;

[0027] Figure 4 is a schematic diagram of the filling cylinder fixing seat of the liquid working medium filling device of the present application;

[0028] Figure 5 is a sectional view of the liquid working medium filling device after filling of the present application.

[0029] Reference signs:

[0030] 1-filling cylinder; 11-filling channel; 12-disconnector; 121-housing; 122-sliding core; 123- support; 124-spring; 2-piston; 21-sealing rubber ring; 22-spiral hole; 3-pad; 4-top pad; 41-spiral through hole; 5-filling cylinder fixing seat; 51-arc wall; 52-top support table; 53-bottom mounting table; 54-scale pin. DETAILED DESCRIPTION

[0031] A liquid working medium filling device is further described in detail below in combination with specific embodiments, which are only used for comparison and explanation purposes, and the present application is not limited to these embodiments.

[0032] A specific embodiment of the present application is shown in Figure 1 A liquid working medium filling device is disclosed, which comprises a filling cylinder 1, a piston 2 and a filling cylinder fixing seat 5. The piston 2 is arranged inside the filling cylinder 1, and the diameter of the piston 2 is the same as the inner wall of the filling cylinder 1, so that the side wall of the piston 2 is in contact with the inner wall of the filling cylinder 1, and the piston 2 can slide back and forth along the inner wall of the filling cylinder 1. The filling cylinder 1 is detachably mounted in the filling cylinder fixing seat 5, so that the filling cylinder 1 can be precisely filled with liquid working medium under the positioning of the filling cylinder fixing seat 5.

[0033] Further, the device further comprises a pad 3 and a top pad 4. The pad 3 is arranged in plurality, and the plurality of pads 3 are arranged in parallel on the piston 2. The top pad 4 is arranged on the pad 3.

[0034] Specifically, the pad 3 and the top pad 4 are coaxially arranged with the piston 2, and the diameters of the pad 3 and the top pad 4 are arranged in parallel with each other and with the piston 2, so that the outer walls of the pad 3, the top pad 4 and the piston 2 are all parallel to the inner wall of the filling cylinder 1.

[0035] Specifically, the piston 2, the pad 3 and the top pad 4 are placed in the filling cylinder 1 in sequence from bottom to top, so that the piston 2, the pad 3 and the top pad 4 are in parallel contact with the inner bottom surface of the filling cylinder 1. After the filling cylinder 1 is placed on the filling cylinder fixing seat 5 after being vacuumized, the liquid working medium is injected into the filling cylinder 1 from the bottom of the filling cylinder 1, and the liquid working medium injected into the filling cylinder 1 can drive the piston 2 to slide upwards, and the movement direction of the piston 2 is guided by the pad 3 and the top pad 4. This kind of filling device can make the piston 2 always parallel to the bottom of the filling cylinder 1, avoiding the problem of tilting of the piston 2, and at the same time, this kind of injection method can avoid the shaking of the liquid working medium and keep its stability.

[0036] Furthermore, the filling cylinder 1 includes a filling channel 11 and a disconnector 12. The filling cylinder 1 is a cylindrical cylinder, and the filling channel 11 is an L-shaped channel that protrudes from the bottom of the filling cylinder 1. One end of the filling channel 11 communicates with the bottom of the filling cylinder 1, allowing the liquid working medium to be poured into the filling cylinder 1 through the filling channel 11. The other end of the filling channel 11 is fixedly connected to the disconnector 12 by bolts. The liquid working medium inlet connector can inject the liquid working medium into the filling channel 11 through the disconnector 12. After filling is completed, the liquid working medium inlet connector can be directly unplugged, and the disconnector 12 will automatically seal itself.

[0037] Specifically, the filling channel 11 is connected to the lower surface of the bottom of the filling cylinder 1 and is located at the center of the filling cylinder 1. It is coaxially arranged with the filling cylinder 1 so that when the liquid working medium is added into the filling cylinder 1, the pressure and intensity of the liquid working medium entering the filling cylinder 1 container in all directions are equal, thereby increasing the stability of the filling process.

[0038] Among them, such as Figures 2-3 As shown, the disconnector 12 includes a housing 121, a sliding core 122, a support 123, and a spring 124. The housing 121 has an inner cavity to accommodate the sliding core 122, the support 123, and the spring 124, and this cavity also serves as a flow channel for the liquid working fluid. The base of the support 123 is fixedly connected to the bottom of the housing 121. A sliding tube is provided at the axis of the support 123, allowing one end of the sliding core 122 to slide back and forth within the sliding tube. The other end of the sliding core 122 can be sealed to or separated from the opening of the housing 121. The spring 124 is sleeved on the outside of the support 123, with one end of the spring 124 used to press against the sliding core 122. When the sliding core 122 is compressed by an external force to the spring 124 (when the liquid working medium inlet connector is inserted into the disconnector 12), the sliding core 122 separates from the opening of the housing 121, and the liquid working medium flows into the inner cavity of the housing 121 and into the filling channel 11 through the inner cavity; when the external force is removed from the sliding core 122 (when the liquid working medium inlet connector is pulled out of the disconnector 12), the spring 124 is in an extended state and can abut against the opening of the sliding core 122 and the housing 121 to form a seal.

[0039] It is worth noting that the pads 3, which are parallel to the piston 2, fit tightly against the upper surface of the piston 2. The multiple pads 3 can apply a vertical downward pressure to the piston 2 perpendicular to the bottom of the filling cylinder 1. The pressure of the pads 3 on the piston 2 can guide the movement of the piston 2 in the filling cylinder 1, ensuring the coaxiality of the piston 2 and the filling cylinder 1, that is, ensuring the parallelism between the bottom surface of the piston 2 and the filling cylinder 1.

[0040] Furthermore, during the filling process, the pad block 3 can be removed from the filling cylinder 1 sequentially from the top to the bottom to leave filling and storage space for the liquid working medium.

[0041] Further, the piston 2 comprises a sealing rubber ring 21, which is arranged on the outer wall of the piston 2 and plays a sealing role between the piston 2 and the filling cylinder 1.

[0042] During the filling process of the liquid working medium, the piston 2 moves upward in the filling cylinder 1, and in this process, the sealing rubber ring 21 directly contacts the inner wall of the filling cylinder 1 and slides on the inner wall of the filling cylinder 1.

[0043] It is worth noting that the cushion block 3 is arranged inside the filling cylinder 1, and the diameter of the cushion block 3 is slightly smaller than the inner diameter of the filling cylinder 1 and slightly larger than the diameter of the piston 2, which ensures the coaxiality between the cushion block 3 and the filling cylinder 1 and the piston 2. This arrangement makes the cushion block 3 have a guiding effect on the movement direction of the piston 2 in the filling cylinder 1. In other words, during the filling process, the liquid working medium drives the piston 2 to move upward, thereby driving the cushion block 3 to move synchronously. Since the cushion block 3 is closely attached to the inner wall of the filling cylinder 1, the piston 2 is further ensured to have coaxiality between the cylindrical surface of the piston 2 and the cylindrical surface of the filling cylinder 1, so that the cushion block 3 has a further guiding effect on the movement direction of the piston 2 inside the filling cylinder 1, that is, the parallelism between the piston 2 and the bottom surface of the filling cylinder 1 and the cushion block 3 is ensured, which avoids the inclination of the piston 2 inside the filling cylinder 1 and reduces the probability of generating abrasive dust due to the friction between the sealing rubber ring 21 on the piston 2 and the filling cylinder 1. At the same time, it avoids the excessive compression rate of the sealing rubber ring 21 in a local area, so that the material of the sealing rubber ring 21 is not worn off during the upward movement of the piston 2, thereby avoiding the introduction of foreign matter into the filling cylinder 1 during the filling process.

[0044] It is worth noting that the cushion block 3 has a circular through hole, which is used to reduce the weight of the cushion block 3 and facilitate the removal of the cushion block 3 from the filling cylinder 1.

[0045] Further, all sharp edges of the cushion block 3 are chamfered to avoid scratching the inner wall of the filling cylinder 1 during the movement of the cushion block 3, otherwise the liquid working medium will cause corrosion at the scratched part of the inner wall of the cylinder, resulting in internal roughness, which causes the inclination of the piston 2 and the dry friction between the piston 2 and the filling cylinder 1, thereby causing the inclination of the piston 2. The flatness of the upper and lower surfaces of the cushion block 3 is 0.1, and the lower surface is the reference, and the parallelism of the upper surface relative to the reference is 0.1, so as to ensure the parallelism between the cushion block 3 and the piston 2.

[0046] Further, as shown in Figure 4 the filling cylinder fixing seat 5 comprises an arc-shaped wall 51, a top supporting table 52 and a bottom mounting table 53. The top supporting table 52 is mounted on the upper end of the arc-shaped wall 51, and the bottom mounting table 53 is mounted on the lower end of the arc-shaped wall 51. The top supporting table 52 and the bottom mounting table 53 are arranged in parallel with each other, and the arc-shaped wall 51 is arranged perpendicular to the top supporting table 52 and the bottom mounting table 53.

[0047] Specifically, the bottom mounting table 53 is a circular ring structure, one side of which is provided with a U-shaped opening capable of accommodating the filling channel 11 arranged below the filling cylinder 1. The arc-shaped wall 51 is a semicircular arc wall, the circular arc of the arc-shaped wall 51 is the same as the circular arc of the filling cylinder 1, and the arc-shaped wall 51 and the filling cylinder 1 are coaxially arranged.

[0048] When the filling cylinder 1 is placed on the filling cylinder fixing seat 5, the filling channel 11 can be accommodated in the U-shaped opening of the bottom mounting table 53, and the outer wall of the filling cylinder 1 is in close contact with the inner part of the arc-shaped wall 51, so that the filling cylinder 1 can be fixed relative to the filling cylinder fixing seat 5, that is, the filling cylinder 1 can be quickly positioned on the filling cylinder fixing seat 5 through the arc-shaped wall 51 of the filling cylinder fixing seat 5, ensuring that the bottom of the filling cylinder 1 can be arranged parallel to the bottom mounting table 53, so that the filling cylinder 1 can maintain horizontal degree when being filled.

[0049] Further, the filling cylinder fixing seat 5 has a height difference between the top supporting table 52 and the bottom mounting table 53 (the lower surface of the top supporting table 52 and the upper surface of the bottom mounting table 53), which is equal to the sum of the height of the filling cylinder 1 and the height of the top layer cushion block 4. The distance between the lower surface of the top supporting table 52 and the upper surface of the filling cylinder 1 is equal to the thickness of the top layer cushion block 4.

[0050] Specifically, the top supporting table 52 of the filling cylinder fixing seat 5 is a circular ring table, and the operator can observe the general situation of the filling process, that is, the upward state of the top layer cushion block 4 in the filling cylinder, in real time through the circular ring opening above, so as to estimate and judge in advance. In addition, the diameter of the circular ring table of the top supporting table 52 is smaller than the diameter of the top layer cushion block 4.

[0051] Further, the filling cylinder fixing seat 5 further comprises a scale pin 54 for measuring the relative distance between the top layer cushion block 4 and the top supporting table 52 in real time, so as to determine the filling condition of the liquid working medium in the filling cylinder 1. The scale pin 54 is slidingly connected in the pin hole of the top supporting table 52, and the top layer cushion block 4 can contact the scale pin 54 and drive the scale pin 54 to slide synchronously in the pin hole when the top layer cushion block 4 goes up.

[0052] Further, the scale pin 54 is fixedly connected with a limiting piece above, and the limiting piece can be limited on the upper surface of the top supporting table 52 when the scale pin 54 moves downward.

[0053] Specifically, the scale pin 54 is provided with a scale line for measuring the upward distance of the top layer cushion block 4, so as to determine whether the cushion block 3 needs to be removed or whether the injection of the liquid working medium into the filling cylinder 1 needs to be stopped.

[0054] As Figure 5As shown, when all the pads 3 are removed, the piston 2 is in contact with the top layer pad 4, and as the liquid working medium is injected into the filling cylinder 1, the distance between the upper surface of the top layer pad 4 and the lower surface of the top support table 52 gradually decreases, so that the top layer pad 4 is in contact with the scale pin 54. The liquid working medium continues to be injected into the filling cylinder 1, and the top layer pad 4 drives the scale pin 54 to move upward synchronously. When the displacement of the scale pin reaches the standard, the injection is stopped, and the injection process is completed.

[0055] It is worth noting that, since the top support table 52 and the bottom mounting table 53 are arranged in parallel, the parallelism between the upper surface of the top layer pad 4 and the lower surface of the top support table 52 is ensured, thereby ensuring the parallelism between the upper and lower surfaces of the piston 2 and the bottom of the filling cylinder 1, further avoiding the problem of excessive local compression rate or excessive local friction force of the sealing rubber ring 21, effectively reducing the risk of material wear or falling off of the sealing rubber ring 21 during the upward movement of the piston 2, avoiding the falling material from entering the filling cylinder 1 during the filling process, and avoiding the introduction of foreign matter, which leads to the impurity of the liquid working medium.

[0056] In this embodiment, the difference between the pad 3 and the top layer pad 4 lies in the different principles of their functions. During the filling process, the pad 3 is limited by the cylindrical diameter of the filling cylinder 1 to ensure the coaxiality between the cylindrical surface of the piston 2 and the cylindrical surface of the filling cylinder 1. The upper surface of the top layer pad 4 is in contact with the lower surface of the top support table 52, which indirectly ensures the parallelism between the upper and lower surfaces of the piston 2 and the bottom of the filling cylinder 1. In addition, when the upper surface of the top layer pad 4 is in contact with the lower surface of the top support table 52, the liquid working medium cannot continue to be injected, so that the amount of liquid in the filling cylinder 1 reaches the quantitative effect, which is convenient for batch production.

[0057] Further, the piston 2 further comprises a spiral hole 22, and the top layer pad 4 comprises a spiral through hole 41. The spiral hole 22 is arranged at the top axis of the piston 2 and does not pass through the bottom of the piston 2; the spiral through hole 41 is arranged at the axis of the top layer pad 4 and passes through the top layer pad 4. The spiral hole 22 and the spiral through hole 41 are coaxially arranged and have the same diameter, and an external threaded part can rotate through the spiral through hole 41 to reach the spiral hole 22, and after the top layer pad 4 and the piston 2 are fixedly connected, the top layer pad 4 and the piston 2 are taken out at the same time. Alternatively, the external threaded part can be connected to the spiral through hole 41 and the spiral hole 22 respectively, and the top layer pad 4 and the piston 2 can be taken out respectively according to actual needs.

[0058] Specifically, since the top layer pad 4 needs to be removed and replaced many times during the filling process, the spiral through hole 41 of the top layer pad 4 is connected with the circular cutout on the pad 3, which can achieve the effect of exhausting air when the top layer pad 4 is removed and replaced, and ensure the parallelism between the pad 3 and the top layer pad 4.

[0059] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application shall be encompassed within the protection scope of the present application.

[0060] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application shall be encompassed within the protection scope of the present application.

Claims

1. A liquid charge device, characterized by comprising: It includes filling cylinder (1), piston (2), cushion block (3), top cushion block (4) and filling cylinder fixing seat (5), the piston (2), the cushion block (3) and the top cushion block (4) are placed in the filling cylinder (1) from below to above in turn, the piston (2) can reciprocate along the inner wall of the filling cylinder (1); The filling cylinder (1) is detachably installed on the filling cylinder fixing seat (5), so that the filling cylinder (1) can be filled with liquid working medium under the positioning of the filling cylinder fixing seat (5); Wherein, the filling cylinder (1) includes filling channel (11), the filling channel (11) is protrudingly arranged at the bottom of the filling cylinder (1), and the liquid working medium is injected into the filling cylinder (1) through the filling channel (11), the liquid working medium drives the piston (2) to slide upward, the movement direction of the piston (2) is guided by the cushion block (3) and the top cushion block (4), so as to avoid the piston (2) to incline.

2. The liquid charge device of claim 1, wherein The filling cylinder (1) further includes disconnector (12), the disconnector (12) is connected with the filling channel (11).

3. The liquid charge device of claim 2, wherein The filling cylinder fixing seat (5) includes arc wall (51), top support table (52) and bottom mounting table (53).

4. The liquid charge device of claim 3, wherein The top support table (52) and the bottom mounting table (53) are arranged in parallel, and the arc wall (51) is arranged perpendicularly to the top support table (52) and the bottom mounting table (53).

5. The liquid charge device of claim 4, wherein The bottom mounting table (53) is provided with a U-shaped opening, and the U-shaped opening can accommodate the filling channel (11).

6. A liquid charge device according to any one of claims 3 to 5, wherein The filling cylinder fixing seat (5) further includes scale pin (54), and the scale pin (54) is arranged on the top support table (52).

7. The liquid charge device according to any one of claims 1 to 5, characterized in that, The piston (2) includes sealing rubber ring (21).

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