Buffer device for ensuring balance of filling pressure

Abstract

The utility model provides a buffer device for guaranteeing the balance of filling pressure, which comprises an upper housing and a lower housing, one side of the upper housing is fixedly connected with the lower housing, a buffer diaphragm pad is fixedly connected at the butt joint of the upper housing and the lower housing, an air inlet and a flow sleeve are fixedly connected above the upper housing, and the flow sleeve is fixedly connected above the air inlet. A liquid level monitoring assembly is fixedly connected to one side of the flow sleeve, a flow valve rod is slidably connected to the interior of the flow sleeve, the lower portion of the flow valve rod is fixedly connected to a buffer diaphragm pad, and the liquid level monitoring assembly comprises a liquid level sensor, a lower liquid level probe and an upper liquid level probe; when the pressure of the lower cavity is increased and the flow valve rod is jacked up to shield the upper liquid level probe, the liquid level sensor receives a signal and can confirm that the pressure of the supply end is too high, an external compressed air supply device can be started, the stable pressure at the position of the buffer diaphragm pad can be recovered, and the production cost can be reduced while the stable filling quantity of finished medicine bags can be ensured; the method is suitable for large-scale industrial production.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine production and filling, in particular to a buffer device for ensuring filling pressure balance. Background Art

[0002] Terminally sterilized products controlled by the filling process of pharmaceutical production are widely used in the pharmaceutical industry. However, existing technologies for filling large-volume soft bags significantly impact the volume of the final sterilized product during the filling process due to factors such as pressure, speed, and flow meter accuracy. This has been a persistent problem in the pharmaceutical industry, leading to large volume variations and insufficient filling. This creates potential market complaints and product quality incidents caused by patients suffering from substandard product quality. Therefore, a buffer device is needed to ensure balanced filling pressure.

[0003] After searching, the Chinese patent publication number CN205575574U discloses a new type of constant liquid level filling device that ensures pressure balance, including a bottom barrel, a barrel cover is provided on the top of the bottom barrel coaxially with the cover, a plurality of filling pipes are distributed on the bottom edge of the bottom barrel, the barrel cover is provided with a liquid inlet pipe, the barrel cover is fixed to the liquid storage device through the liquid inlet pipe, the bottom of the bottom barrel is rotatably connected to the base via a rotating vertical shaft, an overflow groove is fixed to the bottom edge of the barrel cover, the barrel mouth of the bottom barrel is provided with a flange facing outward, the outer edge of the flange is located within the notch range of the overflow groove; the side wall of the liquid inlet pipe is provided with a plurality of liquid outlet holes at the lower pipe mouth;

[0004] In view of the problem that the above technology lacks the function of quickly detecting the problem and quickly stabilizing the pressure when the supply pressure is too high, a buffer device is proposed to ensure the balance of filling pressure. Utility Model Content

[0005] In view of this, the embodiments of the present invention hope to provide a buffer device that ensures the balance of filling pressure, so as to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the utility model is achieved as follows: it includes an upper cover shell and a lower cover shell, one side of the upper cover shell is fixedly connected to the lower cover shell, a buffer diaphragm pad is fixedly connected to the joint of the upper cover shell and the lower cover shell, an air inlet and a flow sleeve are fixedly connected to the top of the upper cover shell, a liquid level monitoring component is fixedly connected to one side of the flow sleeve, a flow valve stem is slidably connected to the inside of the flow sleeve, and the bottom of the flow valve stem is fixedly connected to the buffer diaphragm pad.

[0007] In some embodiments, the liquid level monitoring assembly includes a liquid level sensor, a lower liquid level probe and an upper liquid level probe, wherein the lower liquid level probe and the upper liquid level probe are fixedly connected to one side of the flow sleeve, and one end of the lower liquid level probe and the upper liquid level probe are fixedly connected to one end of the liquid level sensor through a data line.

[0008] In some embodiments, a clamp is fixedly connected to one end of the upper cover shell and the flow sleeve, and a sealing rubber ring is fixedly connected to the connection between the upper cover shell and the lower cover shell.

[0009] In some embodiments, a liquid outlet and a liquid inlet are fixedly connected to the bottom of the lower cover.

[0010] In some embodiments, the liquid inlet has one end fixedly connected to a control component, a plurality of cavities are opened inside the control component, a translation rod is slidably connected inside the control component, a sealing plate is fixedly connected to one end of the translation rod, and a retaining ring is fixedly connected to the middle cavity of the control component.

[0011] In some embodiments, a blocking tube is fixedly connected to one end of the control component and the air inlet, and a pushing diaphragm is fixedly connected to the cavity on one side of the control component.

[0012] In some embodiments, one end of the translation rod is fixedly connected to a push plate.

[0013] In some embodiments, a spring is fixedly connected to one end of the translation rod and the inner cavity of the control assembly.

[0014] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0015] A buffer device that ensures balanced filling pressure. When the flow valve stem is lifted up to cover the upper liquid level probe by increasing the pressure in the lower chamber, the liquid level sensor receives a signal, confirming that the pressure on the supply end is too high. At this time, the external compressed air supply device can be started to restore the position of the buffer diaphragm pad to stabilize the pressure. This can ensure the stability of the finished medicine bag filling volume while reducing production costs. It is suitable for large-scale industrial production.

[0016] A buffer device that ensures filling pressure balance. Before the compressed air squeezes the buffer diaphragm pad, a translation rod moves the sealing plate to seal one end of the liquid inlet tightly against the retaining ring to prevent the liquid from flowing back due to the entry of compressed air and causing damage to the device.

[0017] 1. A buffer device to ensure the balance of filling pressure. The push plate can prevent the pushing diaphragm from being squeezed and damaged when the pushing diaphragm squeezes the translation rod. The spring can push the blocking plate away from the retaining ring to reset it.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. 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 following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is the main structural diagram of the utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the utility model;

[0022] Figure 3 This is a cross-sectional structural diagram of the control assembly of the present utility model;

[0023] Figure 4 This is a diagram of the internal structure of the control component of the present utility model.

[0024] Reference numerals:

[0025] 1. Upper cover; 2. Lower cover; 3. Air inlet; 4. Clamp; 5. Flow sleeve; 6. Liquid level sensor; 7. Liquid outlet; 8. Liquid inlet; 9. Flow valve stem; 10. Lower liquid level probe; 11. Upper liquid level probe; 12. Sealing tube; 13. Buffer diaphragm pad; 14. Sealing rubber ring; 15. Control assembly; 16. Translation rod; 17. Retaining ring; 18. Sealing plate; 19. Spring; 20. Push plate; 21. Push diaphragm. DETAILED DESCRIPTION

[0026] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] Example 1:

[0029] like Figure 1-4As shown, a buffer device for ensuring filling pressure balance includes an upper cover shell 1 and a lower cover shell 2. One side of the upper cover shell 1 is bolted to the lower cover shell 2. A buffer diaphragm pad 13 is fixedly connected to the butt joint of the upper cover shell 1 and the lower cover shell 2. An air inlet 3 and a flow sleeve 5 are fixedly connected to the top of the upper cover shell 1. The air inlet 3 is connected to an external compressed air supply device. The flow sleeve 5 is preferably made of high borosilicate glass. A liquid level monitoring component is fixedly connected to one side of the flow sleeve 5. A flow valve stem 9 is slidably connected inside the flow sleeve 5. The flow valve stem 9 is made of stainless steel. The bottom of the flow valve stem 9 is fixedly connected to the buffer diaphragm pad 13.

[0030] The liquid level monitoring assembly includes a liquid level sensor 6, a lower liquid level probe 10, and an upper liquid level probe 11. The lower liquid level probe 10 and the upper liquid level probe 11 are fixedly connected to one side of the flow sleeve 5. One end of the lower liquid level probe 10 and the upper liquid level probe 11 are fixedly connected to one end of the liquid level sensor 6 through a data line. The liquid level sensor 6 is preferably a multi-probe liquid level sensor, which can be a photoelectric type sensor. The lower liquid level probe 10 and the upper liquid level probe 11 can determine the position of the flow valve stem 9 by detecting the different refractive indices of the objects in front.

[0031] The upper cover 1 and the lower cover 2 are both made of 316L stainless steel. The interior of the upper cover 1 and the lower cover 2 is divided into upper and lower chambers by a buffer diaphragm pad 13. The lower chamber is used to buffer the perfusion medicine. When the supply pressure is too high, there is too much medicine in the lower chamber, which will squeeze the buffer diaphragm pad 13 upward. At this time, the elastic buffer diaphragm pad 13 will push the flow valve stem 9 upward;

[0032] When the pressure is at a normal level, the top of the flow valve stem 9 is located above the lower liquid level probe 10. When the pressure in the lower chamber increases, the flow valve stem 9 is pushed up to block the upper liquid level probe 11. At this time, the liquid level sensor 6 receives a signal, which confirms that the pressure at the supply end is too high. At this time, the external compressed air supply device can be started to restore the position of the buffer diaphragm pad 13 to stabilize the pressure.

[0033] In this embodiment, the upper cover shell 1 and the flow sleeve 5 are fixedly connected with a clamp 4 at one end, and a sealing rubber ring 14 is fixedly connected at the connection between the upper cover shell 1 and the lower cover shell 2. The clamp 4 can be fixed to the upper cover shell 1 and the flow sleeve 5 by bolts on one side. The sealing rubber ring 14 can seal the joint between the upper cover shell 1 and the lower cover shell 2 to prevent leakage.

[0034] In this embodiment, a liquid outlet 7 and a liquid inlet 8 are fixedly connected to the lower portion of the lower cover shell 2 , and the liquid outlet 7 and the liquid inlet 8 are used for medicine to enter and exit the lower chamber.

[0035] In this embodiment, the interior of the upper housing 1 and the lower housing 2 is divided into upper and lower chambers by a buffer diaphragm pad 13. The lower chamber is used to buffer the perfusion medicine. When the supply pressure is too high, there is too much medicine in the lower chamber, which will squeeze the buffer diaphragm pad 13 upward. At this time, the elastic buffer diaphragm pad 13 will push the flow valve stem 9 upward.

[0036] When the pressure is at a normal level, the top of the flow valve stem 9 is located above the lower liquid level probe 10. When the pressure in the lower chamber increases and the flow valve stem 9 is pushed up to block the upper liquid level probe 11, the liquid level sensor 6 receives a signal, which can confirm that the pressure at the supply end is too high. At this time, the external compressed air supply device can be started to restore the position of the buffer diaphragm pad 13 to stabilize the pressure; the clamp 4 can be fixed to the upper cover shell 1 and the flow sleeve 5 by bolts on one side, and the sealing rubber ring 14 can seal the joint between the upper cover shell 1 and the lower cover shell 2 to prevent leakage;

[0037] The liquid outlet 7 and the liquid inlet 8 are used for medicine to enter and exit the lower chamber.

[0038] Example 2:

[0039] A buffer device to ensure filling pressure balance, this embodiment makes the following improvements on the basis of embodiment 1, such as Figure 1-4 As shown,

[0040] In this embodiment, a control assembly 15 is fixedly connected to one end of the liquid inlet 8. A plurality of cavities are opened inside the control assembly 15. A translation rod 16 is slidably connected to the inside of the control assembly 15. A blocking plate 18 is fixedly connected to one end of the translation rod 16. A retaining ring 17 is fixedly connected to the cavity in the middle of the control assembly 15.

[0041] The control component 15 and one end of the air inlet 3 are fixedly connected to a blocking tube 12, and a pushing diaphragm 21 is fixedly connected to the cavity on one side of the control component 15;

[0042] The blocking plate 18 and the retaining ring 17 in the control assembly 15 have an inclination angle for docking. When the two are fully docked, they can prevent the liquid medicine from flowing into the upper cover 1 and the lower cover 2. Normal liquid medicine will push the blocking plate 18 away without affecting normal perfusion. When compressed air enters the upper chamber due to excessive pressure, the compressed air will simultaneously enter the cavity on one side of the control assembly 15 through the blocking tube 12, thereby squeezing and pushing the diaphragm 21 to deform, allowing the translation rod 16 to move with the blocking plate 18 and close to the retaining ring 17 for blocking.

[0043] One end of the liquid inlet 8 can be closed before the compressed air squeezes the buffer diaphragm pad 13 to prevent the liquid from flowing back due to the entry of compressed air and causing damage to the device; at the same time, pushing the diaphragm 21 can isolate the inside and outside to prevent leakage.

[0044] In this embodiment, a push plate 20 is fixedly connected to one end of the translation rod 16, and a spring 19 is fixedly connected to one end of the inner cavity of the translation rod 16 and the control component 15. The push plate 20 can prevent the pushing diaphragm 21 from being squeezed and damaged when squeezing the translation rod 16 through the pushing diaphragm 21. The spring 19 can push the sealing plate 18 away from the retaining ring 17 for reset.

[0045] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A buffer device for ensuring filling pressure balance, comprising an upper cover (1) and a lower cover (2), characterized in that: One side of the upper cover shell (1) is fixedly connected to the lower cover shell (2); a buffer diaphragm pad (13) is fixedly connected to the joint between the upper cover shell (1) and the lower cover shell (2); an air inlet (3) and a flow sleeve (5) are fixedly connected above the upper cover shell (1); a liquid level monitoring component is fixedly connected to one side of the flow sleeve (5); a flow valve stem (9) is slidably connected inside the flow sleeve (5); and the bottom of the flow valve stem (9) is fixedly connected to the buffer diaphragm pad (13).

2. A buffer device for ensuring filling pressure balance according to claim 1, characterized in that: The liquid level monitoring assembly comprises a liquid level sensor (6), a lower liquid level probe (10) and an upper liquid level probe (11); the lower liquid level probe (10) and the upper liquid level probe (11) are fixedly connected to one side of the flow sleeve (5); and one end of the lower liquid level probe (10) and the upper liquid level probe (11) are fixedly connected to one end of the liquid level sensor (6) via a data line.

3. A buffer device for ensuring filling pressure balance according to claim 2, characterized in that: The upper cover shell (1) and one end of the flow sleeve (5) are fixedly connected with a clamp (4), and the connection between the upper cover shell (1) and the lower cover shell (2) is fixedly connected with a sealing rubber ring (14).

4. A buffer device for ensuring filling pressure balance according to claim 3, characterized in that: A liquid outlet (7) and a liquid inlet (8) are fixedly connected to the lower portion of the lower housing (2).

5. A buffer device for ensuring filling pressure balance according to claim 4, characterized in that: A control component (15) is fixedly connected to one end of the liquid inlet (8), a plurality of cavities are formed inside the control component (15), a translation rod (16) is slidably connected to the inside of the control component (15), a blocking plate (18) is fixedly connected to one end of the translation rod (16), and a retaining ring (17) is fixedly connected to the cavity in the middle of the control component (15).

6. A buffer device for ensuring filling pressure balance according to claim 5, characterized in that: The control component (15) and one end of the air inlet (3) are fixedly connected to a blocking tube (12), and a pushing diaphragm (21) is fixedly connected in a cavity on one side of the control component (15).

7. A buffer device for ensuring filling pressure balance according to claim 6, characterized in that: One end of the translation rod (16) is fixedly connected to a push plate (20).

8. The buffer device for ensuring filling pressure balance according to claim 7, characterized in that: A spring (19) is fixedly connected to one end of the inner cavity of the translation rod (16) and the control assembly (15).

Images