Plunger pump and concatemer rotary valve connecting structure

Abstract

The utility model discloses a connecting structure of plunger pumps and a concatemer rotary valve, which belongs to the technical field of filling metering control and comprises a rotary valve sleeve, a plurality of plunger pumps and a connecting component used for connecting the rotary valve sleeve and the plunger pumps, and the rotary valve sleeve and the plurality of plunger pumps are supported by a fixed frame. The plunger pump comprises a plunger sleeve and a plunger rod installed in the plunger sleeve, the plunger sleeve comprises a plunger upper end, a plunger middle end and a plunger lower end, a flat milling position is machined on the outer wall of the plunger middle end, the connecting assembly comprises a connecting pipe, and the top end of the connecting pipe is connected with the bottom end of the rotary valve sleeve. The plunger pump and the rotary valve sleeve are connected through the connecting pipe, the connecting pipe is subjected to dual protection sealing through the sealing ring, screws or hoops are not needed for connection, parts are reduced, meanwhile, a certain floating space is achieved, assembly errors caused by multiple parts can be eliminated, the plunger pump is arranged to be the plunger upper end, the plunger middle end and the plunger lower end, and the assembly efficiency is improved. And the fixing bracket can be conveniently and quickly disassembled and assembled when being used for fixing.

Description

Technical Field

[0001] The utility model relates to the technical field of filling metering control, and belongs to a connection structure of a plunger pump and a multi-unit rotary valve. Background Art

[0002] The matching of plunger pump and multi-joint rotary valve has been widely used in the fields of pharmaceuticals and food for high-precision metering pumps for precise volumetric filling of liquids. The multi-joint rotary valve consists of two parts, namely the rotary valve sleeve and the rotary valve stem. The rotary valve sleeve has a hollow cylindrical inner cavity with extremely high cylindricality and a very smooth surface close to a mirror surface. There are N groups of fluid channels on it. Each group of fluid channels is located on the same circular cross-section and has three channel holes evenly distributed (usually at a 90-degree angle), which are the liquid inlet, the liquid outlet and the plunger connection port. The rotary valve stem is a long circular rod with extremely high cylindricality and a very smooth surface close to the mirror surface roughness. It is precisely matched with the inner cavity of the rotary valve sleeve, and the gap is in the micron level. The channel hole on the rotary valve stem is equidistant from the rotary valve sleeve. The liquid channel is switched by rotating the rotary valve stem to realize the filling metering function. For example, the prior art publication number is CN206785614U, a plunger pump valve group and an opposed plunger pump using the valve group.

[0003] Since the processing of multi-unit rotary valves is extremely difficult, the distance between two adjacent channels is compressed as much as possible from the perspective of manufacturing cost and space occupation. When the plunger is installed directly below the multi-unit rotary valve, the installation space is very small. In the past, two methods were used for fixing: 1. Clamp fixing method. 2. Clamp connection method.

[0004] However, the above two ways of installing the plunger pump have the following defects: 1. There are too many parts, and the manufacturing and processing costs are high; 2. Due to the narrow space, disassembly and assembly are inconvenient; when disassembling and assembling the multi-unit rotary valve and the plunger pump, one person cannot operate it alone and requires the cooperation of multiple people; 3. When removing the plunger, the multi-unit rotary valve must be removed first, which is very troublesome; 4. The seal between the plunger pump and the multi-unit rotary valve is unreliable; 5. After installation, the verticality of the plunger pump cannot be guaranteed, the noise is relatively loud during operation, and the different shafts of the plunger pump will wear, reducing the service life of the plunger pump. Utility Model Content

[0005] To this end, the utility model provides a plunger pump and a multi-unit rotary valve connection structure to solve the problem in the prior art that the plunger pump and the multi-unit rotary valve are inconvenient to install and disassemble due to many parts and small space.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A connection structure between a plunger pump and a multi-unit rotary valve comprises a rotary valve sleeve, a plurality of plunger pumps and a connection assembly for connecting the rotary valve sleeve and the plunger pump, wherein the rotary valve sleeve and the plurality of plunger pumps are supported by a fixed frame, the plunger pump comprises a plunger sleeve and a plunger rod installed inside the plunger sleeve, the plunger sleeve comprises a plunger upper end, a plunger middle end and a plunger lower end, the outer wall of the plunger middle end is processed with a milling flattening position, the connection assembly comprises a connecting pipe, the top end of the connecting pipe is connected to the bottom end of the rotary valve sleeve, a sealing gasket is provided between the top end of the connecting pipe and the rotary valve sleeve, the bottom end of the connecting pipe is connected to the upper end of the plunger, and a sealing ring is provided between the connecting pipe and the inner wall of the upper end of the plunger.

[0008] Furthermore, an annular groove is processed on the outer wall of the connecting pipe, and the sealing ring is located in the annular groove.

[0009] Furthermore, the top of the connecting pipe is processed with a plurality of threaded holes, each threaded hole is penetrated by a fixing screw, the bottom of the rotary valve sleeve is processed with threaded holes with the same number as the threaded holes, and the fixing screws are threadedly connected with the threaded holes to fix the connecting pipe and the rotary valve sleeve.

[0010] Furthermore, the bottom end of the rotary valve sleeve is provided with a plurality of plunger channel openings 1, and the bottom end of each sealing pad is provided with a plunger channel opening 2 which is connected with the plunger channel opening 1.

[0011] Furthermore, the fixed frame includes a first column and a second column, a mounting plate is connected between the first column and the second column, and a front end of the mounting plate is provided with U-shaped holes having the same number as the middle end of the plunger.

[0012] Furthermore, at least one pressing plate is connected to the front end of the mounting plate, and the pressing plate is pressed into the milled flat position to improve the stability of the plunger pump.

[0013] Furthermore, the rotary valve sleeve is detachably mounted on the top ends of the first column and the second column, and the top end of the first column is detachably connected with a transmission shaft for driving the rotary valve sleeve.

[0014] Furthermore, the front end of the mounting plate is processed with a plurality of clamping plunger screw holes, and the front end of the pressure plate is processed with through holes with the same number as the clamping plunger screw holes, each through hole is penetrated by a clamping plunger screw, and the clamping plunger screw is threadedly connected to the clamping plunger screw hole for connecting the pressure plate and the mounting plate.

[0015] The utility model has the following advantages:

[0016] The utility model connects the plunger pump and the rotary valve sleeve through a connecting pipe. The connecting pipe is doubly protected and sealed by two sealing rings. No screws or clamps are required for connection, which reduces the number of parts. At the same time, a certain floating space can be provided, and assembly errors caused by multiple parts can be eliminated. The plunger pump is configured as a plunger upper end, a plunger middle end and a plunger lower end, and can be conveniently and quickly disassembled and assembled when fixed with a fixed bracket.

[0017] The plunger pump can be disassembled separately without removing the rotary valve sleeve, and the plunger pump and the rotary valve sleeve can be disassembled and assembled by one person with both hands. The structure is simple, the number of spare parts is reduced, the manufacturing cost is reduced, and at the same time, more space is left for disassembly and assembly, which is convenient and quick to install.

[0018] The fixed bracket is supported by the first column and the second column, which reduces the manufacturing cost, increases the rigidity and stability of the fixed bracket, reduces vibration during operation, and makes it easy to adjust the parallelism and verticality of the fixed frame. Therefore, using the fixed bracket to fix the plunger pump can improve the verticality of the plunger pump, reduce noise during operation, ensure the coaxiality of the plunger pump, reduce the eccentric wear of the plunger pump, and extend the service life of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 The overall structural diagram provided by the utility model;

[0022] Figure 2 An exploded view of the overall structure provided by the utility model;

[0023] Figure 3 A cross-sectional view of a rotary valve sleeve and a plunger pump provided by the utility model;

[0024] Figure 4 for Figure 3 A magnified view of part A in FIG.

[0025] Figure 5 A schematic diagram of the structure of the connection assembly provided by the utility model;

[0026] Figure 6 This is a structural diagram of the plunger pump provided by the utility model.

[0027] In the figure: 1, rotary valve sleeve; 2, plunger pump; 21, plunger sleeve; 22, plunger rod; 211, plunger upper end; 212, plunger middle end; 213, plunger lower end; 214, milling flat position;

[0028] 3. Connecting assembly; 31. Connecting pipe; 32. Sealing pad; 33. Sealing ring; 34. Annular groove; 35. Threaded hole; 36. Fixing screw; 37. Threaded hole;

[0029] 4. Fixed frame; 41. Column 1; 42. Column 2; 43. Mounting plate; 44. U-shaped hole; 45. Pressing plate; 46. Pressing plunger screw hole; 47. Through hole; 48. Pressing plunger screw;

[0030] 5. Plunger channel opening one; 6. Plunger channel opening two. DETAILED DESCRIPTION

[0031] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Refer to the instruction manual Figure 1-6 The utility model provides a plunger pump and a multi-unit rotary valve connection structure, including a rotary valve sleeve 1, a plurality of plunger pumps 2 and a connection assembly 3 for connecting the rotary valve sleeve 1 and the plunger pump 2. The rotary valve sleeve 1 and the plurality of plunger pumps 2 are supported by a fixed frame 4. The plunger pump 2 includes a plunger sleeve 21 and a plunger rod 22 installed inside the plunger sleeve 21. The plunger sleeve 21 includes a plunger upper end 211, a plunger middle end 212 and a plunger lower end 213. The outer wall of the plunger middle end 212 is processed with a milling flattening position 214.

[0033] The connecting assembly 3 includes a connecting tube 31, the top and bottom ends of the connecting tube 31 have small diameters and a large middle diameter, and the middle thickness of the connecting tube 31 is designed to be 3-8 mm, the top end of the connecting tube 31 is connected to the bottom end of the rotary valve sleeve 1, and a sealing gasket 32 ​​is provided between the top end of the connecting tube 31 and the rotary valve sleeve 1, the bottom end of the connecting tube 31 is connected to the upper end 211 of the plunger, and a sealing ring 33 is provided between the connecting tube 31 and the inner wall of the upper end 211 of the plunger, and two sealing rings 33 are provided.

[0034] Specifically, the fixed frame 4 includes a column 1 41 and a column 2 42, the number of the column 2 42 is two, and a mounting plate 43 is connected between the column 1 41 and the two columns 2 42, the thickness of the mounting plate 43 is greater than or equal to the width of the milling flattening position 214, and the thickness of the mounting plate 43 is less than half of the middle end 212 of the plunger, and is designed to be 20 mm. The front end of the mounting plate 43 is provided with U-shaped holes 44 of the same number as the middle end 212 of the plunger, and the arc diameter of the U-shaped hole 44 matches the middle end 212 of the plunger (the arc diameter of the U-shaped hole 44 is 0.1-0.25 mm larger than the diameter of the middle end 212 of the plunger).

[0035] In addition, at least one pressure plate 45 is connected to the front end of the mounting plate 43 , and the thickness of the pressure plate 45 matches the milling flattening position 214 (the thickness of the pressure plate 45 is 0.1-0.25 mm smaller than the thickness of the milling flattening position 214 ). The pressure plate 45 is pressed into the milling flattening position 214 to improve the stability of the plunger pump 2 .

[0036] When connecting the plunger pump 2 and the rotary valve sleeve 1, first insert the plunger pump 2 rod into the plunger sleeve 21 to assemble the plunger pump 2, and then push the plunger pump 2 horizontally into the U-shaped hole 44 at the front end of the mounting plate 43. At this time, a certain space is maintained between the upper end 211 of the plunger of the plunger pump 2 and the connecting pipe 31 without contact, and it is located directly below the connecting pipe 31. Then push the plunger pump 2 upward and sleeve it on the lower end of the connecting pipe 31, and the sealing function is realized by two sealing rings 33. Then rotate the plunger pump 2 so that the milled flat position 214 is parallel to the long axis direction of the mounting plate 43, and then fix the pressure plate 45 to the mounting plate 43. The pressure plate 45 is pressed into the milled flat position 214 on the surface of the middle end 212 of the plunger to fix the plunger pump 2.

[0037] In this embodiment, the plunger pump 2 and the rotary valve sleeve 1 are connected through a new type of connecting pipe 31. The top end of the connecting pipe 31 is tightly connected to the rotary valve sleeve 1 through multiple fixing screws 36, and a sealing gasket 32 ​​is provided for sealing. The bottom end of the connecting pipe 31 is plugged into the upper end 211 of the plunger and is doubly sealed by two sealing rings 33. No screws or clamps are required for connection, which reduces the number of parts. At the same time, it has a certain floating space, which can eliminate assembly errors caused by multiple parts.

[0038] In this embodiment, an annular groove 34 is processed on the outer wall of the connecting pipe 31, and the number of the annular grooves 34 is two. Two sealing rings 33 are respectively located in the two annular grooves 34. The sealing rings 33 are installed in the sealing grooves and then connected to the upper end 211 of the plunger, which can ensure that the pressure of 0.4MPA is not leaking. In addition, a plurality of threaded holes 35 are processed on the top of the connecting pipe 31, and each threaded hole 35 is penetrated by a fixing screw 36. The bottom end of the rotary valve sleeve 1 is processed with threaded holes 37 with the same number as the threaded holes 35. The fixing screws 36 are threadedly connected with the threaded holes 37 to fix the connecting pipe 31 and the rotary valve sleeve 1, and it is convenient to remove the connecting pipe 31 from the rotary valve sleeve 1 for replacement.

[0039] In this embodiment, a plurality of clamping plunger screw holes 46 are processed at the front end of the mounting plate 43, and a through hole 47 with the same number as the clamping plunger screw holes 46 is processed at the front end of the pressure plate 45. A clamping plunger screw 48 runs through each through hole 47. The clamping plunger screw 48 is threadedly connected to the clamping plunger screw hole 46 for connecting the pressure plate 45 and the mounting plate 43. By loosening the clamping plunger screw 48, the pressure plate 45 can be removed from the mounting plate 43, and then the plunger pump 2 can be grasped and removed from the connecting pipe 31, thereby realizing rapid disassembly and assembly of the plunger pump 2.

[0040] Refer to the instruction manual Figure 1 The rotary valve sleeve 1 is detachably mounted on the top of the column 1 41 and the column 2 42 , and the top of the column 1 41 is detachably connected with a transmission shaft for driving the rotary valve sleeve 1 .

[0041] The bottom end of the rotary valve sleeve 1 is provided with a plurality of plunger channel openings 5 ​​, and the bottom end of each sealing gasket 32 ​​is provided with a plunger channel opening 6 connected to the plunger channel opening 5 , for connecting the plunger pump 2 with the rotary valve sleeve 1 .

[0042] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A connection structure between a plunger pump and a multi-unit rotary valve, characterized in that: It comprises a rotary valve sleeve (1), a plurality of plunger pumps (2), and a connecting assembly (3) for connecting the rotary valve sleeve (1) and the plunger pumps (2), wherein the rotary valve sleeve (1) and the plurality of plunger pumps (2) are supported by a fixed frame (4); The plunger pump (2) comprises a plunger sleeve (21) and a plunger rod (22) installed inside the plunger sleeve (21); the plunger sleeve (21) comprises a plunger upper end (211), a plunger middle end (212) and a plunger lower end (213); and the outer wall of the plunger middle end (212) is processed with a milling flattening portion (214); The connecting assembly (3) comprises a connecting pipe (31), the top end of the connecting pipe (31) being connected to the bottom end of the rotary valve sleeve (1), and a sealing gasket (32) being provided between the top end of the connecting pipe (31) and the rotary valve sleeve (1), the bottom end of the connecting pipe (31) being connected to the upper end (211) of the plunger, and a sealing ring (33) being provided between the connecting pipe (31) and the inner wall of the upper end (211) of the plunger.

2. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 1, characterized in that: An annular groove (34) is machined on the outer wall of the connecting pipe (31), and the sealing ring (33) is located in the annular groove (34).

3. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 1, characterized in that: The top end of the connecting pipe (31) is processed with a plurality of threaded holes (35), each threaded hole (35) having a fixing screw (36) passing through it, and the bottom end of the rotary valve sleeve (1) is processed with threaded holes (37) having the same number as the threaded holes (35), and the fixing screws (36) are threadedly connected with the threaded holes (37) to fix the connecting pipe (31) and the rotary valve sleeve (1).

4. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 1, characterized in that: The bottom end of the rotary valve sleeve (1) is provided with a plurality of plunger channel openings (5), and the bottom end of each sealing gasket (32) is provided with a plunger channel opening (6) which is connected to the plunger channel opening (5).

5. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 1, characterized in that: The fixed frame (4) comprises a first column (41) and a second column (42), a mounting plate (43) being connected between the first column (41) and the second column (42), and a front end of the mounting plate (43) is provided with U-shaped holes (44) having the same number as the middle end (212) of the plunger.

6. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 5, characterized in that: At least one pressing plate (45) is connected to the front end of the mounting plate (43), and the pressing plate (45) is pressed into the milling flattening position (214).

7. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 5, characterized in that: The rotary valve sleeve (1) is detachably mounted on the top ends of the first column (41) and the second column (42), and the top end of the first column (41) is detachably connected to a transmission shaft for driving the rotary valve sleeve (1).

8. The connection structure of the plunger pump and the multi-unit rotary valve according to claim 6, characterized in that: The front end of the mounting plate (43) is processed with a plurality of clamping plunger screw holes (46), and the front end of the pressing plate (45) is processed with through holes (47) having the same number as the clamping plunger screw holes (46). A clamping plunger screw (48) passes through each through hole (47), and the clamping plunger screw (48) is threadedly connected to the clamping plunger screw hole (46) for connecting the pressing plate (45) and the mounting plate (43).

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