Plunger rod for medicine filling

Abstract

The utility model provides a plunger rod for medicine filling, and relates to the technical field of medical treatment. According to the plunger rod for medicine filling, the plunger rod is installed in a filling barrel, and a ceramic lining is arranged on the inner side wall of the filling barrel; the plunger rod comprises a rod body, a limiting plate, a reinforcing layer, a sealing piece, a driving mechanism and a controller. A plurality of mounting grooves are formed in the outer side wall of the rod body in the circumferential direction of the rod body. And a limiting plate is mounted in each mounting groove. And a reinforcing layer is arranged on the outer side wall of the limiting plate. The sealing piece is installed at one end of the rod body, and the sealing piece is matched with the inner diameter of a filling barrel. After the strengthening layer is arranged on the outer side wall of the limiting plate, the limiting plate is in clearance fit with the ceramic lining. The movable end of the driving mechanism is connected with the end, located outside the filling barrel, of the rod body. And the controller is electrically connected with the driving mechanism. The limiting plate is arranged on the rod body, meanwhile, the reinforcing layer is arranged on the limiting plate, the reinforcing layer is in clearance fit with the ceramic inner layer after installation, and movement of the rod body is prevented from being affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical technology field especially is related to a plunger rod for medicine filling. BACKGROUND

[0002] The existing medicine filling equipment includes filling barrel, plunger rod and driving device, the plunger rod is installed in the filling barrel, and the driving device is connected with the plunger rod. When filling, the driving device drives the plunger rod to move, so that the medicament filled in the filling barrel can be squeezed out through the plunger rod.

[0003] The existing plunger rod is prone to deformation or fracture when being squeezed out due to uneven force on the axis, which affects the normal use of the filling equipment. UTILITY MODEL CONTENT

[0004] The utility model discloses a plunger rod for medicine filling to solve the above-mentioned technical problem, the limit board is set up on the rod body, and the reinforcing layer is set up on the limit board, and the reinforcing layer is matched with the ceramic inner layer after installation, so that the movement of the rod body is avoided, and the problem that the rod body is damaged when the gravity center of the rod body deviates during filling is also avoided.

[0005] The utility model discloses the technical scheme that adopts:

[0006] A plunger rod for medicine filling is installed in a filling barrel, and an inner side wall of the filling barrel is provided with a ceramic lining.

[0007] A rod body is provided with a plurality of mounting grooves on the outer side wall thereof along the circumferential direction thereof.

[0008] A limit board is installed in each mounting groove.

[0009] A reinforcing layer is arranged on the outer side wall of the limit board.

[0010] A sealing element is installed at one end of the rod body, and the sealing element is matched with the inner diameter of the filling barrel.

[0011] A driving mechanism is connected to one end of the rod body outside the filling barrel.

[0012] A controller is electrically connected to the driving mechanism.

[0013] When the reinforcing layer is arranged on the outer side wall of the limit board, the limit board is matched with the ceramic lining in a clearance.

[0014] Optionally, the ceramic lining is an integral forming structure, and the ceramic lining is detachably connected to the filling barrel.

[0015] Optionally, one end of the rod body is provided with a positioning plate, and the sealing member is matched with the positioning plate.

[0016] Optionally, the sealing member comprises:

[0017] a mounting disc matched with one end of the rod body, and a sealing groove is arranged on the circumferential sidewall of the mounting disc;

[0018] a sealing lip arranged in the sealing groove and matched with the sidewall of the filling barrel.

[0019] Optionally, the plunger rod further comprises:

[0020] a plurality of reinforcing plates arranged on both sides of the limiting plate in the height direction, one end of the reinforcing plate is connected with the limiting plate, and the other end of the reinforcing plate is connected with the rod body.

[0021] Optionally, the driving mechanism comprises:

[0022] a linear mechanism installed on the top of the filling barrel, and the controller is electrically connected with the linear mechanism;

[0023] a connecting piece, one end of which is connected with the linear mechanism, and the other end of which is connected with the rod body.

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] 1. In order to improve the adaptability of the filling barrel, a ceramic lining is arranged on the inner side of the filling barrel, so that the adaptability of the filling barrel is improved.

[0026] 2. The limiting plate is arranged on the rod body, and the reinforcing layer is arranged on the limiting plate. After installation, the reinforcing layer is matched with the ceramic inner layer in a gap, so as to avoid affecting the movement of the rod body, and also avoid the problem of damage to the rod body when the force center of the rod body deviates during the filling process. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is a schematic diagram of the overall structure of the plunger rod for drug filling.

[0029] Figure 2 It is a schematic diagram of the rod body structure of the plunger rod for drug filling.

[0030] Reference signs:

[0031] 1, filling barrel; 11, ceramic lining; 2, rod body; 21, mounting groove; 22, positioning plate; 3, limiting plate; 4, reinforcing layer; 5, sealing element; 51, mounting disc; 52, sealing lip; 6, driving mechanism; 61, linear mechanism; 62, connecting piece; 7, controller; 8, reinforcing plate. DETAILED DESCRIPTION

[0032] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0033] In the description of the present application, it is to be understood that the terms "top", "bottom", "inner", "outer", "axial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "fixed", and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0037] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0038] As shown in Figure 1 and Figure 2 The present application provides a plunger rod for medicine filling, which is installed in a filling barrel 1, and an inner side wall of the filling barrel 1 is provided with a ceramic lining 11. The plunger rod comprises a rod body 2, a limiting plate 3, a reinforcing layer 4, a sealing element 5, a driving mechanism 6 and a controller 7. An outer side wall of the rod body 2 is provided with a plurality of mounting grooves 21 along a circumferential direction thereof. Each mounting groove 21 is mounted with a limiting plate 3. An outer side wall of the limiting plate 3 is provided with the reinforcing layer 4. The sealing element 5 is mounted at one end of the rod body 2, and the sealing element 5 matches an inner diameter of the filling barrel 1. After the reinforcing layer 4 is arranged on the outer side wall of the limiting plate 3, the limiting plate 3 is in clearance fit with the ceramic lining 11. An active end of the driving mechanism 6 is connected with one end of the rod body 2 located outside the filling barrel 1. The controller 7 is electrically connected with the driving mechanism 6.

[0039] When filling liquid, the pressure on the rod body 2 is different due to different filling liquids, so as to improve the structural strength of the plunger rod and adapt to the filling of different liquids. The ceramic lining 11 is arranged in the filling barrel 1 to avoid reaction between the liquid and the inner side wall of the filling barrel 1. In order to limit the rod body 2, the mounting grooves 21 are arranged on the side wall of the rod body 2, and the limiting plate 3 is mounted in the mounting groove 21. After the reinforcing layer 4 is mounted on the limiting plate 3, the reinforcing layer 4 is in clearance fit with the ceramic lining 11, so as to avoid severe friction between the reinforcing layer 4 and the ceramic lining 11 and improve the service life of the rod body 2. The limiting plate 3 limits the rod body 2 to avoid offset and breakage of the rod body 2 during the filling process. The reinforcing layer 4 in the embodiment is made of ceramic.

[0040] In one of the embodiments, as shown in Figure 1 in order to further improve the service life of the filling barrel 1, the ceramic lining 11 is in one-piece structure. When the ceramic lining 11 is damaged, in order to facilitate replacement of the ceramic lining 11, the ceramic lining 11 is detachably connected with the filling barrel 1.

[0041] In one embodiment, as shown in Figure 1 In order to facilitate the connection of the rod body 2 and the sealing member 5, one end of the rod body 2 is provided with a positioning plate 22, and the sealing member 5 is matched with the positioning plate 22.

[0042] In one embodiment, as shown in Figure 1 In use, the liquid is pushed out of the filling barrel 1 by the sealing member 5. The sealing member 5 comprises a mounting disc 51 and a sealing lip 52. The mounting disc 51 is matched with the positioning plate 22, and the mounting disc 51 is provided with a sealing groove on the circumferential side wall. The sealing lip 52 is installed in the sealing groove. After installation, the sealing lip 52 is matched with the side wall of the filling barrel 1.

[0043] In one embodiment, as shown in Figure 1 and Figure 2 In use, in order to further improve the structural strength of the rod body 2, the plunger rod further comprises a reinforcing plate 8. The reinforcing plate 8 is provided with a plurality of reinforcing plates 8 along the height direction of the limiting plate 3. One end of the reinforcing plate 8 is connected with the limiting plate 3, and the other end of the reinforcing plate 8 is connected with the rod body 2.

[0044] In one embodiment, as shown in Figure 1 In order to facilitate the automatic movement of the rod body 2, the driving mechanism 6 comprises a linear mechanism 61 and a connecting member 62. The linear mechanism 61 is installed on the top of the filling barrel 1, and the controller 7 is electrically connected with the linear mechanism 61. One end of the connecting member 62 is connected with the linear mechanism 61, and the other end of the connecting member 62 is connected with the rod body 2.

[0045] In use, the controller 7 controls the movement of the linear mechanism 61, and the linear mechanism drives the rod body 2 to move according to the preset requirements.

[0046] The linear mechanism 61 in the embodiment can be a linear motor, a pneumatic cylinder, a hydraulic cylinder, or a screw pair that can realize linear motion.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A plunger rod for drug filling, wherein the plunger rod is installed inside a filling container, characterized in that, The inner wall of the filling barrel is lined with a ceramic liner; the plunger rod includes: The rod body has multiple mounting grooves on its outer side wall along its circumferential direction; A limiting plate is installed in each of the mounting slots; A reinforcing layer is provided on the outer wall of the limiting plate; A seal is installed at one end of the rod, and the seal is matched with the inner diameter of the filling barrel; A drive mechanism, the movable end of which is connected to the end of the rod located outside the filling barrel; The controller is electrically connected to the drive mechanism; Wherein, when the reinforcing layer is disposed on the outer side wall of the limiting plate, the limiting plate and the ceramic liner are fitted with a clearance.

2. The plunger rod for drug filling according to claim 1, characterized in that, The ceramic liner is a one-piece molded structure, and the ceramic liner is detachably connected to the filling barrel.

3. The plunger rod for drug filling according to claim 1 or 2, characterized in that, A positioning plate is provided at one end of the rod, and the sealing element cooperates with the positioning plate.

4. The plunger rod for drug filling according to claim 1, characterized in that, The sealing element includes: The mounting plate is fitted to one end of the rod body, and a sealing groove is provided on the circumferential side wall of the mounting plate; A sealing lip is disposed within the sealing groove, and the sealing lip mates with the side wall of the filling barrel.

5. The plunger rod for drug filling according to claim 1, characterized in that, The plunger rod further includes: A reinforcing plate is provided on both sides along the height direction of the limiting plate. One end of the reinforcing plate is connected to the limiting plate, and the other end of the reinforcing plate is connected to the rod.

6. The plunger rod for drug filling according to claim 1, characterized in that, The drive mechanism includes: A linear mechanism is installed on top of the filling barrel, and the controller is electrically connected to the linear mechanism; The connector is connected at one end to the linear mechanism and at the other end to the rod.

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