Connecting structure of concatemer rotary valve and metering pump

Abstract

The utility model discloses a connecting structure of a concatemer rotary valve and a metering pump, which belongs to the technical field of metering pumps and comprises a rotary switching valve and a plurality of plunger pumps, the rotary switching valve is connected with the plurality of plunger pumps through a connecting assembly, and the connecting assembly comprises a channel amplification plate detachably connected to the bottom end of the rotary switching valve. A plurality of first connecting openings are fixedly formed in the top end of the channel amplification plate, a plurality of second connecting openings are fixedly formed in the two sides of the channel amplification plate, and a plurality of plunger fixing clamping positions are formed in the two sides of the channel amplification plate. Under the condition that the sealing performance of the rotary switching valve is ensured, the length of the rotary switching valve is shortened, the machining difficulty is reduced, the occupied space is reduced, the manufacturing cost is reduced, the channel amplification plate is additionally arranged to effectively amplify a fluid channel, the plunger pumps are installed on the two sides of the rotary switching valve in rows and distributed in a staggered mode, and the sealing performance of the rotary switching valve is improved. And the space utilization rate is improved, and meanwhile, more plunger pumps can be matched.

Description

Technical Field

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

[0002] The plunger pump is a high-precision metering pump widely used in the fields of pharmaceuticals and food for precise volumetric filling of liquids. The structural components of the products currently sold on the market are: a high-precision plunger assembly, including a plunger pump sleeve and a plunger pump plug, and a rotary switching valve assembly responsible for switching the liquid channel. The rotary switching valve assembly usually has multiple channels (1-20). For example, the prior art publication number is CN206617289U, a three-head valveless rotary ceramic plunger metering pump.

[0003] Each channel of the rotary switching valve has three liquid channel ports, namely the plunger connection port, the liquid inlet port and the liquid outlet port. The rotary switching valve is usually connected to the plunger connection port below by a clamp or other connection method. The plunger pump is usually driven by a servo motor, which is relatively large in size (installation spacing exceeds 60mm). The switching channel spacing of the rotary switching valve is usually designed to exceed the servo motor installation spacing (at least more than 60mm).

[0004] The connection between the rotary switching valve and the plunger pump is made by a clamp or other connection methods, which has the following defects: 1. In the traditional design, the plunger pump is installed directly below the rotary switching valve. When a filling system with more channels is to be realized, the rotary switching valve must be made very long (for example, 10 switching channels must be made 700mm long), which is very difficult to process; 2. The manufacturing cost of a rotary switching valve that is too long is very high; 3. A rotary switching valve that is too long occupies a large space; 4. A rotary switching valve that is too long cannot guarantee its cylindricality after processing, and there is a risk of unreliable sealing; 5. A rotary switching valve that is too long is prone to breakage during use; 6. The space for installing the plunger pump directly below the rotary switching valve is narrow, and installation and disassembly are inconvenient, time-consuming and labor-intensive; 7. The connection between the rotary switching valve and the plunger pump is connected by a clamp or other connection methods, resulting in the plunger pump and the parts that drive the plunger pump to move linearly up and down are not on the same axis, which will cause jamming during operation, resulting in different axis wear, and shortening the service life of the plunger pump. Utility Model Content

[0005] To this end, the utility model provides a multi-unit rotary valve and metering pump connection structure to solve the problems in the prior art that the rotary switching valve is too long, resulting in difficulty in processing, high manufacturing cost, large space occupation, unreliable sealing, easy breakage during use, inconvenient installation and disassembly, and affecting the service life of the plunger pump.

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

[0007] A multi-unit rotary valve and metering pump connection structure, comprising a rotary switching valve and a plurality of plunger pumps, wherein the rotary switching valve and the plurality of plunger pumps are connected via a connecting assembly;

[0008] The connection assembly includes a channel amplification plate detachably connected to the bottom end of the rotary switching valve, a plurality of connection ports 1 are fixedly provided on the top of the channel amplification plate, a plurality of connection ports 2 are fixedly provided on both sides of the channel amplification plate, a plurality of plunger fixed positions are provided on both sides of the channel amplification plate, and the plurality of connection ports 2 are respectively provided in the plurality of plunger fixed positions;

[0009] The plunger pump comprises a plunger end, a plunger sleeve and a plunger rod arranged inside the plunger sleeve. The outer wall of the plunger end is processed with a plunger concave clamping position, and the plunger concave clamping position is inserted into the plunger fixed clamping position.

[0010] Furthermore, the rotary switching valve comprises a rotary valve sleeve and a rotary valve stem arranged inside the rotary valve sleeve, and the rotary valve sleeve is provided with a plurality of groups of channels 1, and each group of channels 1 comprises a connected liquid inlet, a liquid outlet and a plunger channel opening.

[0011] Furthermore, the rotary valve stem is provided with a plurality of groups of channel 2, each group of channel 2 comprises a channel hole 1, a channel hole 2 and a channel hole 3 which are connected, and the plunger channel port is connected with the connection port 1, the connection port 2 and the plunger end.

[0012] Furthermore, sealing gaskets are provided between the plunger channel opening and the first connection port, and between the second connection port and the plunger end.

[0013] Furthermore, multiple fastening screw holes are processed on the outer walls of both sides of the channel amplification plate, and pressure plates are provided on both sides of the channel amplification plate. The pressure plates are clamped with multiple recessed positions of the plungers, and the two pressure plates are detachably connected to the fastening screw holes by tightening the handles.

[0014] Furthermore, a connecting component 1 is fixedly provided at the front end of the rotary valve stem, a connecting component 2 is fixedly provided at the front and rear sides of the rotary valve sleeve, a plurality of fastening screw holes 2 are processed at the top of the channel amplification plate, and the two connecting components 2 are detachably connected together through connecting screws and the fastening screw holes 2.

[0015] Furthermore, a driving connection component is fixedly provided at the bottom end of the plunger rod.

[0016] Furthermore, a plurality of plunger fixing positions located on both sides of the channel amplification plate are staggeredly distributed.

[0017] The utility model has the following advantages:

[0018] While ensuring the sealing performance of the rotary switching valve, the utility model shortens the length of the rotary switching valve, thereby reducing the difficulty of processing, reducing space occupancy, and reducing manufacturing costs. A channel amplification plate is added to effectively amplify the fluid channel, and multiple plunger pumps are installed on both sides of the rotary switching valve in a staggered distribution, thereby improving space utilization and being able to match more plunger pumps.

[0019] Fewer sealing gaskets are used to seal the plunger channel opening and the first connection port, the second connection port and the plunger end, thereby reducing the risk of unreliable sealing.

[0020] Multiple plunger pumps are arranged on both sides of the rotary switching valve, which can ensure that the plunger pump and the components that drive the plunger pump to move linearly up and down are on the same axis, eliminating the jamming phenomenon that occurs during operation, eliminating the wear of different axes, and extending the service life of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] 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.

[0023] Figure 1 The overall structural diagram provided by the utility model;

[0024] Figure 2 An exploded view of the overall structure provided by the utility model;

[0025] Figure 3 A top view of the overall structure provided by the utility model;

[0026] Figure 4 A schematic diagram of the liquid inlet state provided by the utility model;

[0027] Figure 5 A schematic diagram of the liquid discharge state provided by the utility model;

[0028] Figure 6This is a cross-sectional view of the rotary valve sleeve, channel amplification plate and plunger pump provided by the utility model.

[0029] In the figure: 1, rotary switching valve; 1-1, rotary valve sleeve; 1-2, rotary valve stem; 1-3, liquid inlet; 1-3-1, channel hole 1; 1-4, liquid outlet; 1-5, plunger channel port; 1-4-1, channel hole 2; 1-5-1, channel hole 3; 1-6, connecting component 1; 1-7, connecting component 2; 1-8, connecting screw;

[0030] 2. Plunger pump; 2-1. Plunger end; 2-2. Plunger sleeve; 2-3. Plunger rod; 2-4. Plunger recessed position; 2-5. Drive connection component;

[0031] 3. Connection components; 3-1. Channel amplification board; 3-2. Connection port one; 3-3. Connection port two; 3-4. Plunger fixing position; 3-5. Sealing gasket; 3-6. Fastening screw hole one; 3-7. Pressure plate; 3-8. Tightening handle; 3-9. Fastening screw hole two. DETAILED DESCRIPTION

[0032] 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.

[0033] Refer to the instruction manual Figure 1-Figure 6 The utility model provides a connection structure of a multi-unit rotary valve and a metering pump, comprising a rotary switching valve 1 and a plurality of plunger pumps 2. The rotary switching valve 1 and the plurality of plunger pumps 2 are connected via a connection assembly 3. The connection assembly 3 comprises a channel amplification plate 3-1 detachably connected to the bottom end of the rotary switching valve 1. A plurality of connection ports 1 3-2 are fixedly provided at the top of the channel amplification plate 3-1, and a plurality of connection ports 2 3-3 are fixedly provided at both sides of the channel amplification plate 3-1.

[0034] A plurality of plunger fixing positions 3-4 are provided on both sides of the channel amplification plate 3-1. The plurality of plunger fixing positions 3-4 on both sides of the channel amplification plate 3-1 are staggered to avoid mutual interference between the use of two adjacent plunger pumps 2. A plurality of connection ports 3-3 are respectively provided in the plurality of plunger fixing positions 3-4. The plunger pump 2 comprises a plunger end 2-1, a plunger sleeve 2-2 and a plunger rod 2-3 provided inside the plunger sleeve 2-2, and a driving connection component 2-5 is fixedly provided at the bottom end of the plunger rod 2-3. A plunger concave position 2-4 is processed on the outer wall of the plunger end 2-1, and the plunger concave position 2-4 is inserted into the plunger fixing position 3-4.

[0035] Specifically, the rotary switching valve 1 includes a rotary valve sleeve 1-1 and a rotary valve stem 1-2 arranged inside the rotary valve sleeve 1-1. The rotary valve sleeve 1-1 is provided with multiple groups of channel 1s. It is worth noting that the spacing between two adjacent groups of channel 1s is greater than 60 mm, so as to be suitable for installing the plunger pump 2 drive motor. Each group of channel 1s includes a connected liquid inlet 1-3, a liquid outlet 1-4 and a plunger channel port 1-5. The rotary valve stem 1-2 is provided with multiple groups of channel 2s. Each group of channel 2 includes a connected channel hole 1-3-1, a channel hole 2-1 and a channel hole 3-1. The plunger channel port 1-5 is connected with the connecting port 1 3-2, the connecting port 2 3-3 and the plunger end 2-1, so as to realize the flow of fluid in the rotary switching valve 1, the channel amplification plate 3-1 and the plunger pump 2.

[0036] When connecting the rotary switching valve 1 with multiple plunger pumps 2, first install the rotary valve sleeve 1-1 on the top of the channel amplification plate 3-1. At this time, the multiple plunger channel ports 1-5 at the bottom of the rotary valve sleeve 1-1 are respectively inserted into the multiple connection ports 1 3-2 to achieve the connection between the rotary valve sleeve 1-1 and the channel amplification plate 3-1. Then, align the multiple plunger ends 2-1 with the plunger fixed positions 3-4 and push them in, so that the plunger concave positions 2-4 on the plunger ends 2-1 are inserted into the plunger fixed positions 3-4. At this time, the plunger ends 2-1 are connected with the connection ports 2 3-3. Finally, use the pressure plate 3-7 for reinforcement to complete the connection between the rotary switching valve 1 and the multiple plunger pumps 2.

[0037] The channel amplification plate 3-1 in this embodiment has a simple and compact structure and effectively amplifies the fluid channel. A plurality of plunger pumps 2 are installed on both sides of the rotary switching valve 1 and are staggered, so that suitable space can be obtained for installing the driving motor of the plunger pump 2, thereby improving space utilization and making the entire device occupy less space. It can also ensure that the plunger pump and the components that drive the plunger pump to move linearly up and down are on the same axis, thereby eliminating jamming during operation, eliminating wear on different axes, and extending the service life of the plunger pump.

[0038] Furthermore, in this embodiment, in order to improve the sealing between the channel amplification plate 3-1 and the rotary switching valve 1 and the plurality of plunger pumps 2, sealing gaskets 3-5 are provided between the plunger channel port 1-5 and the connection port 1 3-2, and between the connection port 2 3-3 and the plunger end 2-1. Fewer sealing gaskets 3-5 are used for sealing, thereby reducing the risk of unreliable sealing.

[0039] Refer to the instruction manual Figure 1-Figure 5The outer walls on both sides of the channel amplification plate 3-1 are processed with multiple fastening screw holes 3-6, and pressure plates 3-7 are provided on both sides of the channel amplification plate 3-1. The pressure plates 3-7 are clamped with multiple plunger concave positions 2-4. The two pressure plates 3-7 are detachably connected to the fastening screw holes 3-6 through a tightening handle 3-8. With the help of the pressure plates 3-7, multiple plunger pumps 2 can be reinforced, so as to improve the connection firmness between the plunger pump 2 and the channel amplification plate 3-1. At the same time, the plunger pump 2 can be quickly disassembled by loosening the tightening handle 3-8.

[0040] Then, if Figure 1-Figure 2 As shown, a connecting component 1-6 is fixedly provided at the front end of the rotary valve stem 1-2 for connecting a driving device that drives the rotary valve stem 1-2 to rotate, connecting components 1-7 are fixedly provided on both the front and rear sides of the rotary valve sleeve 1-1, and a plurality of fastening screw holes 3-9 are processed on the top of the channel amplification plate 3-1. The two connecting components 1-7 are detachably connected together through connecting screws 1-8 and fastening screw holes 3-9. By loosening the connecting screws 1-8, the rotary switching valve 1 and the channel amplification plate 3-1 can be quickly disassembled for maintenance and replacement.

[0041] 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 of a multi-unit rotary valve and a metering pump, characterized in that: It comprises a rotary switching valve (1) and a plurality of plunger pumps (2), wherein the rotary switching valve (1) and the plurality of plunger pumps (2) are connected via a connecting assembly (3); The connection assembly (3) comprises a channel amplification plate (3-1) detachably connected to the bottom end of the rotary switching valve (1); a plurality of connection ports 1 (3-2) are fixedly provided at the top of the channel amplification plate (3-1); a plurality of connection ports 2 (3-3) are fixedly provided at both sides of the channel amplification plate (3-1); a plurality of plunger fixing positions (3-4) are provided at both sides of the channel amplification plate (3-1); and the plurality of connection ports 2 (3-3) are respectively provided in the plurality of plunger fixing positions (3-4); The plunger pump (2) comprises a plunger end (2-1), a plunger sleeve (2-2) and a plunger rod (2-3) arranged inside the plunger sleeve (2-2); an outer wall of the plunger end (2-1) is processed with a plunger inner recessed position (2-4); and the plunger inner recessed position (2-4) is inserted into a plunger fixed position (3-4).

2. The connection structure of a multi-unit rotary valve and a metering pump according to claim 1, characterized in that: The rotary switching valve (1) comprises a rotary valve sleeve (1-1) and a rotary valve stem (1-2) arranged inside the rotary valve sleeve (1-1); the rotary valve sleeve (1-1) is provided with a plurality of groups of channels 1, each group of channels 1 comprising a liquid inlet (1-3), a liquid outlet (1-4) and a plunger channel port (1-5) that are connected.

3. The connection structure of a multi-unit rotary valve and a metering pump according to claim 2, characterized in that: The rotary valve stem (1-2) is provided with a plurality of groups of channel 2, each group of channel 2 comprising a channel hole 1 (1-3-1), a channel hole 2 (1-4-1) and a channel hole 3 (1-5-1) that are connected, and the plunger channel port (1-5) is connected to a connection port 1 (3-2), a connection port 2 (3-3) and a plunger end (2-1).

4. The connection structure of a multi-unit rotary valve and a metering pump according to claim 2, characterized in that: A sealing gasket (3-5) is provided between the plunger channel opening (1-5) and the first connection opening (3-2), and between the second connection opening (3-3) and the plunger end (2-1).

5. The connection structure of a multi-unit rotary valve and a metering pump according to claim 1, characterized in that: The outer walls of both sides of the channel amplification plate (3-1) are processed with a plurality of fastening screw holes (3-6), and pressure plates (3-7) are provided on both sides of the channel amplification plate (3-1). The pressure plates (3-7) are clamped with a plurality of plunger recessed clamping positions (2-4), and the two pressure plates (3-7) are detachably connected to the fastening screw holes (3-6) by tightening the handles (3-8).

6. The connection structure of a multi-unit rotary valve and a metering pump according to claim 2, characterized in that: A connecting component 1 (1-6) is fixedly provided at the front end of the rotary valve stem (1-2), connecting components 2 (1-7) are fixedly provided at both the front and rear sides of the rotary valve sleeve (1-1), a plurality of fastening screw holes 2 (3-9) are processed at the top end of the channel amplification plate (3-1), and the two connecting components 2 (1-7) are detachably connected together through connecting screws (1-8) and the fastening screw holes 2 (3-9).

7. The connection structure of a multi-unit rotary valve and a metering pump according to claim 1, characterized in that: A driving connection component (2-5) is fixedly provided at the bottom end of the plunger rod (2-3).

8. The connection structure of a multi-unit rotary valve and a metering pump according to claim 1, characterized in that: A plurality of plunger fixing positions (3-4) located on both sides of the channel amplification plate (3-1) are staggeredly distributed.

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