Stainless steel plunger pump for filling and filling mechanism

Abstract

The utility model relates to the technical field of filling, and discloses a stainless steel plunger pump for filling and a filling mechanism, the plunger pump comprises a pump body and a pump rod assembly movably arranged in the inner cavity of the pump body; the pump body is of a tubular structure, the top of the pump body is in threaded connection with a connector connected with the liquid outlet pipe, and the bottom is provided with an outer flange. The pump rod assembly comprises a hollow rod, a pump core, framework oil seals and a thin nut, a limiting flange is arranged at the top end of the hollow rod, the pump core and the framework oil seals are made of polytetrafluoroethylene materials, the framework oil seals are installed at the two ends of the pump core and arranged on the hollow rod in a penetrating mode, the thin nut and the hollow rod are screwed and fastened, and the hollow rod is connected with the liquid inlet pipe. According to the designed pump rod assembly, the hollow rod is movably sealed with the pump body through the corrosion-resistant and high-lubrication pump core and the framework oil seal, abrasion is small, the requirement for the manufacturing precision of the pump body and the hollow rod is low, and the machining cost of parts can be reduced; and the plunger pump adopts a bottom-in and top-out liquid inlet and outlet mode, so that the pump body and the hollow rod do not need to be drilled.

Description

Technical Field

[0001] This utility model relates to the field of filling technology, and in particular to a stainless steel plunger pump and filling mechanism for filling. Background Technology

[0002] Currently, glass plunger pumps are widely used in liquid filling. The main disadvantages of glass plunger pumps are: first, they are easily broken during use and cleaning; second, the tiny particles generated by the friction between the shaft and sleeve during operation can easily contaminate the filling medium; and third, the filling volume is unstable due to the low manufacturing precision of glass products.

[0003] Patent application CN201820416932.8, filed on March 27, 2018, discloses a filling mechanism using a stainless steel or ceramic pump. This filling mechanism has the following drawbacks:

[0004] 1. The filling pump includes a pump body with an internal cavity structure and a pump rod that reciprocates within the cavity structure. The outlet is located on the upper side of the pump body, and the inlet is located on the lower side of the pump rod. This type of pump directly uses the pump rod to mate with the pump body, requiring high manufacturing precision and increasing manufacturing costs. Furthermore, long-term use between the pump rod and pump body will cause significant wear, reducing their service life. In addition, the inlet and outlet are located on the sides of the pump body and pump rod respectively, requiring additional drilling processes, further increasing manufacturing costs.

[0005] 2. The pump body is connected to the fixed base via a cross joint. To ensure the reliability of the connection, the cross joint is secured with pins. The fixed base is mounted on a mounting plate on the bracket, and the pump rod is connected to the lifting shaft via a coupling. This method of fixing the pump body to the top via a cross joint results in low reliability. Furthermore, the filling pump requires disassembly and assembly of multiple screws, leading to cumbersome disassembly and assembly. In addition, drilling is required on the pump body and pump rod, increasing manufacturing costs.

[0006] Based on this, this application provides a reasonably designed and easy-to-assemble stainless steel plunger pump and filling mechanism for filling to at least solve one of the above problems. Utility Model Content

[0007] The present invention aims to solve the technical problems existing in the prior art. Therefore, the present invention provides a solution.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A stainless steel plunger pump and filling mechanism for filling are provided, which are reasonably designed and easy to disassemble and assemble.

[0010] In a first aspect, a stainless steel plunger pump for filling is provided, comprising a pump body and a pump rod assembly movably disposed within the inner cavity of the pump body; the pump body has a tubular structure, with a connector screwed to the top for connection to an outlet pipe, and an outward flange at the bottom; the pump rod assembly comprises a hollow rod, a pump core, a skeleton oil seal, and a thin nut, the top of the hollow rod is provided with a limiting flange, the pump core and the skeleton oil seal are both made of polytetrafluoroethylene, the skeleton oil seals are installed at both ends of the pump core and pass through the hollow rod, and are screwed and fastened to the hollow rod by the thin nut, the hollow rod being connected to the inlet pipe.

[0011] In some alternative embodiments, PTFE gaskets are provided between the skeleton oil seal and the thin nut, as well as between the joint and the pump body.

[0012] In some alternative embodiments, the pump body, connector, hollow rod, and thin nut are all made of stainless steel.

[0013] In some alternative embodiments, a fixed housing is also included, which is rotatably mounted on the bottom of the pump body and secured by set screws. The outer wall of the fixed housing is provided with an annular mounting groove, and a sealing ring is provided between the fixed housing and the pump body.

[0014] Secondly, a filling mechanism is provided, including a frame, a drive unit, a rotating shaft, a fixed block, a rocker arm, a connecting assembly, and a plunger pump; the plunger pump is a stainless steel plunger pump as described above, the plunger pump is fixedly mounted on a plunger pump mounting plate via a fixed outer shell outside the pump body, the pump rod assembly inside the plunger pump is fixedly connected to the connecting assembly, the plunger pump mounting plate is fixedly mounted on the frame via a support column, the bottom of the connecting assembly is hinged to the top of the rocker arm, the bottom end of the rocker arm is hinged to one end of the fixed block, the other end of the fixed block is fixed to the rotating shaft, and the rotating shaft is driven by the drive unit.

[0015] In some optional embodiments, the connecting assembly includes a connecting cylinder, a semi-circular locking block, and an arc-shaped limiting block. The top open inner wall of the connecting cylinder is provided with a convex ring, and its side is provided with an opening groove to facilitate the connection of the liquid inlet pipe to the plunger pump. The bottom of the pump rod assembly is provided with an annular groove. The outer wall of the semi-circular locking block is provided with a groove that mates with the convex ring, and its inner ring matches the annular groove on the pump rod assembly. The semi-circular locking block is fitted into the connecting cylinder, and the annular groove of the pump rod assembly is located in the inner ring of the semi-circular locking block. The inner ring of the arc-shaped limiting block is engaged with the annular groove of the pump rod assembly and fixed by locking screws on the connecting cylinder.

[0016] In some alternative embodiments, one side of the plunger pump mounting plate is provided with multiple U-shaped grooves, and a pressure plate is fixedly installed between two adjacent U-shaped grooves by screws.

[0017] In some optional embodiments, a filling volume adjustment assembly is also included, comprising a fixed cylinder, an adjusting nut, and a movable cylinder. The fixed cylinder is mounted on the frame, and the movable cylinder is movably fitted onto its outer side. The top of the movable cylinder is detachably mounted to the bottom of the connecting cylinder. The adjusting nut is screwed onto the outer wall of the fixed cylinder. The position of the movable cylinder is controlled by adjusting the position of the adjusting nut on the fixed cylinder, thereby adjusting the descent of the pump rod assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The pump rod assembly designed in this utility model allows the hollow rod to be dynamically sealed with the pump body using a corrosion-resistant, highly lubricated pump core and skeleton oil seal, resulting in less wear and lower precision requirements for the pump body and hollow rod, which can greatly reduce the processing cost of parts; at the same time, the plunger pump adopts a bottom-inlet and top-outlet liquid inlet and outlet method, which is more reasonable in design, eliminating the need for drilling of the pump body and hollow rod, shortening the manufacturing process and reducing production costs;

[0020] 2. This plunger pump has a fixed outer shell mounted at the bottom of the pump body. The fixed outer shell is mounted on the plunger pump mounting plate by a pressure plate, while the hollow rod is mounted on the connecting cylinder by a semi-circular locking block and an arc-shaped limiting block. Disassembly and assembly only require operating two screws on the pressure plate and the connecting cylinder, which is simple and convenient. Moreover, this installation method does not require drilling holes in the pump body and the hollow rod, reducing the production cost of the parts. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a schematic diagram of the stainless steel plunger pump provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the filling mechanism provided by this utility model;

[0024] Figure 3 yes Figure 2 An assembly perspective view of the plunger pump and connecting components is provided.

[0025] Figure 4 yes Figure 3 The provided plunger pump is shown in a top view on the plunger pump mounting plate.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1—Pump body; 1.1—Outer flange; 2—Pump rod assembly; 2.1—Hollow rod; 2.1.1—Limit flange; 2.1.2—Annular groove; 2.2—Pump core; 2.3—Skeleton oil seal; 2.4—Thin nut; 3—Connector; 4—PTFE gasket; 5—Fixed housing; 5.1—Mounting groove; 6—Frame; 7—Rotating shaft; 8—Fixing block; 9—Swing rod; 10—Connecting assembly; 10.1—Connecting cylinder; 10.1.1—Raised ring; 10.1.2—Opening slot, 10.1.3—Locking screw, 10.2—Semi-circular locking block, 10.2.1—Groove, 10.3—Arc-shaped limiting block, 11—Reset mechanism, 11.1—Pull rod, 11.2—Spring, 12—Plunger pump mounting plate, 12.1—U-shaped groove, 13—Support column, 14—Pressure plate, 15—Filling volume adjustment component, 15.1—Fixed cylinder, 15.2—Adjusting nut, 15.3—Moving cylinder. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "installation," "connection," and "linking" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] Example 1

[0034] As attached Figure 1 As shown, this embodiment provides a stainless steel plunger pump for filling, including a pump body 1 and a pump rod assembly 2 movably disposed within the pump body cavity. The pump body 1 of this embodiment has a tubular structure, with a connector 3 screwed to its top for connection to the outlet pipe, and an outwardly flanged edge 1.1 at its bottom. To ensure sealing, a PTFE gasket 4 is provided between the connector 3 and the pump body 1. The pump rod assembly 2 includes a hollow rod 2.1, a pump core 2.2, a skeleton oil seal 2.3, and a thin nut 2.4. The top of the hollow rod 2.1 is provided with a limiting flange 2.1.1. Both the pump core 2.2 and the skeleton oil seal 2.3 are made of PTFE. The skeleton oil seals 2.3 are installed at both ends of the pump core 2.2 and pass through the hollow rod 2.1, and are screwed and fastened to the hollow rod 2.1 by the thin nut 2.4. A PTFE gasket 4 is provided between the thin nut 2.4 and the skeleton oil seal 2.3. The hollow rod 2.1 is connected to the inlet pipe. The pump body 1, connector 3, hollow rod 2.1, and thin nut 2.4 are all made of stainless steel.

[0035] The pump rod assembly designed in this embodiment utilizes a corrosion-resistant, highly lubricated pump core and skeleton oil seal for movable sealing with the pump body, resulting in low wear and a long service life. It also reduces the precision requirements for the pump body and hollow rod, effectively lowering their processing costs. Furthermore, this plunger pump features a bottom-inlet, top-outlet design, directly connecting to the inlet and outlet pipes. Compared to side-inlet / outlet designs, this eliminates the need for drilling holes in the sides of the pump body and hollow rod, further reducing processing costs.

[0036] Furthermore, this embodiment also includes a fixed outer casing 5 at the bottom of the pump body 1. The preferred installation method is that the fixed outer casing 5 is rotatably mounted to the bottom of the pump body 1. The rotatable mounting structure can specifically be as shown in the attached figure. Figure 1 As shown, after the pump body 1 is inserted into the bottom of the fixed housing 5, the bottom of the fixed housing 5 wraps around the outer flange 1.1 of the bottom of the pump body 1. The fixed housing 5 is provided with set screws for fixing the pump body. Preferably, the outer wall of the fixed housing 5 is provided with an annular mounting groove 5.1 to facilitate the installation of the whole assembly consisting of the fixed housing and the plunger pump, and a sealing ring is provided between the fixed housing 5 and the pump body 1.

[0037] Example 2

[0038] Based on Embodiment 1, this embodiment provides a filling mechanism, as shown in the attached figure.Figure 2 To be continued Figure 4 As shown, the system includes a frame 6, a drive unit, a rotating shaft 7, a fixing block 8, a swing arm 9, a connecting assembly 10, a plunger pump, and a reset mechanism 11. The plunger pump is a stainless steel plunger pump as described in Embodiment 1. The plunger pump is fixedly mounted on the plunger pump mounting plate 12 via a fixed outer shell 5 outside the pump body 1. The pump rod assembly 2 inside the plunger pump is fixedly connected to the connecting assembly 10. The plunger pump mounting plate 12 is fixedly mounted on the frame 6 via a support column 13. The bottom of the connecting assembly 10 is connected to the top of the swing arm 9. The bottom end of the swing arm 9 is hinged to one end of the fixed block 8, and the other end of the fixed block 8 is fixed to the rotating shaft 7. The rotating shaft 7 is driven by a drive device, which can be a servo motor. One end of the reset mechanism 11 is fixed to the frame 6, and the other end is connected to the fixed block 8 for resetting the fixed block. The reset mechanism 11 includes a pull rod 11.1 and a spring 11.2. One end of the spring 11.2 is connected to the fixed block 8, and the other end is connected to the pull rod 11.1. The pull rod 11.1 is fixed to the frame.

[0039] Working principle: as shown in the appendix Figure 2 As shown, the drive device controls the rotating shaft to rotate clockwise, which drives the rocker arm to rise. At this time, the hollow rod of the plunger pump rises relative to the pump body, injecting the liquid in the pump body into the filling bottle (at this time, the one-way valve on the inlet pipe is closed, and the one-way valve on the outlet pipe is open). After injection, the fixed block is reset by the action of the reset mechanism, and the rocker arm descends. At this time, the hollow rod of the plunger pump descends relative to the pump body, and the liquid is drawn into the pump body (at this time, the one-way valve on the inlet pipe is open, and the one-way valve on the outlet pipe is closed). This process is repeated.

[0040] Preferred options are listed below. Figure 2 and attached Figure 3 As shown, the connecting assembly 10 in this embodiment includes a connecting cylinder 10.1, a semi-circular locking block 10.2, and an arc-shaped limiting block 10.3. The connecting cylinder 10.1 has a raised ring 10.1.1 on its open inner wall at the top, and an opening groove 10.1.2 on its side to facilitate the connection of the inlet pipe to the plunger pump. The pump rod assembly 2 has an annular groove 2.1.2 at its bottom (i.e., the bottom of the hollow rod has an annular groove). The outer wall of the semi-circular locking block 10.2... A groove 10.2.1 is provided to mate with the convex ring 10.1.1, and its inner ring matches the annular groove 2.1.2 on the pump rod assembly 2. A semi-circular locking block 10.2 is fitted into the connecting cylinder 10.1. The annular groove 2.1.2 of the pump rod assembly 2 is located within the inner ring of the semi-circular locking block 10.2. The inner ring of the arc-shaped limiting block 10.3 is engaged with the annular groove 2.1.2 of the pump rod assembly 2, and the assembly is fixed by a locking screw 10.1.3 on the connecting cylinder 10.1. This installation method in this embodiment can effectively fix the bottom of the hollow rod and also has the advantage of convenient installation and disassembly, requiring only the installation or removal of the locking screw during installation and disassembly.

[0041] Preferably, the installation method of the plunger pump in this embodiment is as follows: as shown in the attached figure. Figure 4 As shown, the plunger pump mounting plate 12 has multiple U-shaped grooves 12.1 on one side. A pressure plate 14 is fixed between adjacent U-shaped grooves 12.1 by screws. The plunger pump with a fixed housing is installed in the U-shaped groove (the mounting groove of the fixed housing is inserted into the U-shaped groove and then fixed by the pressure plate). This installation structure not only ensures the installation reliability of the plunger pump, but also facilitates quick assembly and disassembly of the plunger pump.

[0042] Example 3

[0043] Based on Example 2, in order to adjust the filling volume, as shown in the attached... Figure 2 As shown, this embodiment further includes a filling volume adjustment assembly 15, which includes a fixed cylinder 15.1, an adjusting nut 15.2, and a movable cylinder 15.3. The fixed cylinder 15.1 is mounted on the frame, and the movable cylinder 15.3 is movably fitted onto its outer side. The top of the movable cylinder 15.3 is detachably mounted to the bottom of the connecting cylinder 10.1. The adjusting nut 15.2 is screwed onto the outer wall of the fixed cylinder 15.1. By adjusting the position of the adjusting nut 15.2 on the fixed cylinder 15.1, the position of the movable cylinder 15.3 is controlled, thereby controlling the descent of the plunger pump rod assembly and thus adjusting the filling volume within the pump body.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A stainless steel plunger pump for filling, comprising a pump body and a pump rod assembly movably disposed within the inner cavity of the pump body; characterized in that: The pump body has a tubular structure, with a connector screwed to the top for connection with the liquid outlet pipe and an outward flange at the bottom. The pump rod assembly includes a hollow rod, a pump core, a skeleton oil seal, and a thin nut. The top of the hollow rod is provided with a limiting flange. The pump core and the skeleton oil seal are both made of polytetrafluoroethylene. The skeleton oil seal is installed at both ends of the pump core and passes through the hollow rod. The thin nut is screwed and fastened to the hollow rod. The hollow rod is connected to the liquid inlet pipe.

2. The stainless steel plunger pump for filling according to claim 1, characterized in that: PTFE gaskets are provided between the skeleton oil seal and the thin nut, as well as between the joint and the pump body.

3. The stainless steel plunger pump for filling according to claim 1, characterized in that: The pump body, connectors, hollow rods, and thin nuts are all made of stainless steel.

4. The stainless steel plunger pump for filling according to claim 1, characterized in that: It also includes a fixed housing, which is rotatably mounted on the bottom of the pump body and fixed by set screws. The outer wall of the fixed housing is provided with an annular mounting groove, and a sealing ring is provided between it and the pump body.

5. A filling mechanism, comprising a frame, a drive unit, a rotating shaft, a fixed block, a rocker arm, a connecting assembly, and a plunger pump; characterized in that: The plunger pump is a stainless steel plunger pump as described in any one of claims 1 to 4. The plunger pump is fixedly installed on the plunger pump mounting plate through a fixed outer shell outside the pump body. The pump rod assembly inside the plunger pump is fixedly connected to the connecting assembly. The plunger pump mounting plate is fixedly installed on the frame through a support column. The bottom of the connecting assembly is hinged to the top of the swing rod. The bottom of the swing rod is hinged to one end of the fixed block. The other end of the fixed block is fixed to the rotating shaft. The rotating shaft is driven by a drive device.

6. The filling mechanism according to claim 5, characterized in that: The connecting assembly includes a connecting cylinder, a semi-circular locking block, and an arc-shaped limiting block. The top open inner wall of the connecting cylinder is provided with a convex ring, and its side is provided with an opening groove to facilitate the connection of the liquid inlet pipe to the plunger pump. The bottom of the pump rod assembly is provided with an annular groove. The outer wall of the semi-circular locking block is provided with a groove that mates with the convex ring, and its inner ring matches the annular groove on the pump rod assembly. The semi-circular locking block is fitted into the connecting cylinder, and the annular groove of the pump rod assembly is located in the inner ring of the semi-circular locking block. The inner ring of the arc-shaped limiting block is engaged with the annular groove of the pump rod assembly and fixed by the locking screws on the connecting cylinder.

7. The filling mechanism according to claim 5, characterized in that: The piston pump mounting plate has multiple U-shaped grooves on one side, and a pressure plate is fixed between two adjacent U-shaped grooves by screws.

8. The filling mechanism according to claim 6, characterized in that: It also includes a filling volume adjustment component, which includes a fixed cylinder, an adjusting nut, and a movable cylinder. The fixed cylinder is mounted on the frame, and the movable cylinder is movably fitted on its outer side. The top of the movable cylinder is detachably mounted on the bottom of the connecting cylinder. The adjusting nut is screwed to the outer wall of the fixed cylinder. The position of the movable cylinder is controlled by adjusting the position of the adjusting nut on the fixed cylinder, thereby adjusting the descent of the pump rod assembly.

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