Self-cleaning plunger pump and filling machine with same

Abstract

The utility model provides a self-cleaning plunger pump and a filling machine with the same. The self-cleaning plunger pump comprises a pump body, a plug rod and a plug head, the pump body comprises a first cavity, a second cavity and a discharge port which are sequentially communicated in the direction from a feeding port to the driving device. The inner diameter, close to the second cavity, of the first cavity is always larger than the maximum diameter of the plug head, and the volume of the first cavity is larger than the volume of the plug head; the inner diameter of the second cavity is equal to the maximum diameter of the chock plug; when the chock plug is cleaned, the chock plug is located in the first cavity, a cleaning agent rapidly flows into the first cavity from the feeding port to wash residual liquid on the chock plug, the first cavity and the second cavity, and generated waste liquid is discharged from the discharging port. The utility model can solve the problems that the production efficiency is low, the service life of the pump body is influenced and secondary pollution is easily caused as the difficult-to-clean part between the chock plug and the inner wall of the pump body can be cleaned only by disassembling the pump body in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to the plunger pump technical field, specifically relates to a self -cleaning plunger pump and filling machine who has it. BACKGROUND

[0002] The plunger pump is the pump body that draws and discharges material through a reciprocating piston, and its use ensures that bottled products can be accurately filled with a certain amount, and is widely used in the filling production line of daily chemical products, medicines, food processing and the like. Since the filling production line is usually used for filling a plurality of different products in turn, in order to avoid cross contamination between different products, the plunger pump and the filling conveying pipeline need to be cleaned.

[0003] In actual production, when the traditional plunger pump is used to draw viscous liquid (such as sugar-containing liquid), the liquid is accumulated and attached between the plug head and the inner wall of the pump body, and when not in use, it is easy to cause scale formation in the difficult-to-clean part between the plug head and the inner wall, increase the cleaning difficulty of the plunger pump, and eventually lead to incomplete cleaning of the plunger pump, affecting the filling of the next batch of different products, especially in the medical field, the purity of reagents is extremely high, and any slight pollution may affect the safety and effectiveness of the final product.

[0004] Therefore, some manufacturers choose to disassemble the pump body for comprehensive cleaning. Although this method can improve the cleaning effect, frequent disassembly of the pump body will bring a series of new challenges: first of all, this will undoubtedly interrupt the normal production process and reduce production efficiency; secondly, the precise fit between the pump bodies may be damaged during disassembly, which will damage the original sealing performance and thus shorten the service life of the pump body; finally, the residual liquid in the connecting pipeline after disassembly may drip into the filling machine, causing secondary pollution.

[0005] Therefore, it is one of the technical problems to be solved in the field to design and develop a self-cleaning pump body. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects of the prior art, and provides a self-cleaning plunger pump and a filling machine with the same, which can solve the problem in the prior art that the difficult-to-clean part between the plug head and the inner wall of the pump body can only be thoroughly cleaned by disassembling the pump body, resulting in low production efficiency, affecting the service life of the pump body and being prone to secondary pollution.

[0007] In order to achieve the above object and other objects, the utility model is through including the following technical solutions realizes: as a first aspect, the utility model provides a kind of self-cleaning plunger pump, including pump body, plug rod and plug head, the plug rod and plug head are arranged in the pump body;The one end of the plug rod is connected with the plug head, the other end is stretched out the pump body outside interface driving device, wherein, the pump body includes the first cavity, second cavity and discharge port that are sequentially communicated from feed inlet to the driving device direction;The inner diameter of the first cavity close to the second cavity is always greater than the maximum diameter of the plug head, and volume is greater than the volume of the plug head;The inner diameter of the second cavity is equal to the maximum diameter of the plug head;When cleaning the plug head, make the plug head be located in the first cavity, make cleaning agent flow into the first cavity from the feed inlet quickly, flush the residual liquid on the plug head, first cavity and second cavity, and the waste liquid generated is discharged from the discharge port.

[0008] The first cavity is designed to accommodate the plug head, so that the plug head can reciprocate in the first cavity, and when the plug head is located in the first cavity, the plug head does not block the inner wall of the pump body, and at this time, the use of cleaning agent can complete the complete cleaning of the plug head and the pump body wall surface, and finally the cleaning agent is discharged from the discharge port with waste liquid; In addition, the movement of the plug head in the first cavity can be adjusted to adjust the pressure difference in the pump body, further improving the complete cleaning effect of the cleaning agent in the pump body; The problem that the difficult-to-clean place between the plug head and the inner wall of the pump body can be cleaned only by disassembling the pump body in the prior art is solved.

[0009] In an embodiment, the plug head is in the shape of an ellipsoid, and the half segment of the first cavity away from the driving device is in the shape of a half ellipsoid.

[0010] The upper half segment of the plug head and the first cavity are both arranged in the shape of an ellipsoid, which can further improve the shunt capacity of the cleaning agent entering the first cavity when the pump body is subjected to high-pressure injection of the cleaning agent, improve the impact force of the cleaning agent on the side of the plug head close to the driving device, and improve the turbulent flow and circulation effect of the circulation zone, thereby improving the cleaning effect of the inner wall of the first cavity and the side of the plug head away from the driving device.

[0011] In an embodiment, a slope is formed between the wall surface of the first cavity and the second cavity.

[0012] The slope can assist in guiding the plug head to enter and exit between the first cavity and the second cavity, and further improve the circulation effect of the cleaning agent in the first cavity, thereby improving the cleaning effect on the side of the plug head close to the driving device.

[0013] In an embodiment, the slope and the wall surface of the second cavity form a guide fillet.

[0014] The guide round corner can further assist the plug head to enter and exit between the first cavity and the second cavity, and improve the smoothness of the plug head switching the cavity.

[0015] In an embodiment, the plug head comprises a first plug head and a second plug head, and the first plug head and the second plug head are fixedly connected through a first sealing ring; and an outer end of the first sealing ring is at a maximum diameter position of the plug head.

[0016] The first plug head and the second plug head are convenient for processing of the plug head, and the first sealing ring can ensure that no liquid leaks from between the plug head and the inner wall of the first cavity when the plug head moves in the first cavity to draw and fill, thereby ensuring accurate and quantitative filling.

[0017] In an embodiment, the pump body is provided with a mounting port at one end close to the driving device, for slidingly mounting the plug rod; a sealing cavity is arranged between the mounting port and the second cavity, and a second sealing ring is arranged in the sealing cavity to achieve liquid sealing by sleeving the plug rod.

[0018] The sealing cavity and the second sealing ring can ensure the sealing property of the inner wall of the pump body and the end of the plug rod close to the driving device, and avoid leakage of filling liquid or cleaning agent from the gap between the inner wall of the pump body and the plug rod.

[0019] In an embodiment, the pump body further comprises a third cavity, and the drain port and the mounting port are arranged on the third cavity; the inner diameter of the half section of the third cavity away from the driving device is always greater than the maximum diameter of the plug head, and the volume of the third cavity is at least greater than the volume of the second plug head.

[0020] The structure of the third cavity can ensure that it can accommodate the second plug head, and can maximize the displacement distance of the plug head in the second cavity, thereby expanding the quantitative range of filling.

[0021] In an embodiment, the half section of the third cavity close to the driving device is in a semi-elliptical shape.

[0022] The third cavity in a semi-elliptical shape is beneficial to the discharge of waste liquid.

[0023] As a second aspect, the utility model provides a kind of filling machine, including the self-cleaning plunger pump as described in first aspect.

[0024] The design of the present application can improve the self-cleaning ability of the filling machine, solve the problem of low filling production efficiency, short service life of the pump body and secondary pollution caused by the difficulty of cleaning between the plug head and the inner wall of the pump body in the prior art.

[0025] In an embodiment, a one-way valve is arranged between the feed inlet and the storage tank.

[0026] The one-way valve in the scheme plays a role of preventing backflow, and can avoid backflow of liquid from the self-cleaning plunger pump to the storage tank during filling.

[0027] Compared with the prior art, the self-cleaning plunger pump of the utility model can completely clean the delivery pipeline, the inner wall of the pump body and the plug head without disassembling the pump body, improve the cleaning quality and the cleaning speed, completely collect the waste liquid discharged after cleaning the pump body, and avoid pollution of the equipment by the waste liquid, thereby avoiding the problem of affecting the filling hygiene caused by pollution. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structure schematic view of the self-cleaning plunger pump of the utility model installed in a filling machine is shown.

[0029] Figure 2 A position schematic view of the self-cleaning plunger pump of the utility model in a state of cleaning the pump body and the plug head is shown.

[0030] Figure 3 A cleaning agent flow direction schematic view of the self-cleaning plunger pump of the utility model in the state of cleaning the pump body and the plug head is shown. Figure 2 A zoomed-in view of the middle A in the figure is shown.

[0031] Figure 4 A position schematic view of the self-cleaning plunger pump of the utility model in a state of filling or cleaning a filling needle is shown.

[0032] Figure 5 A position schematic view of the self-cleaning plunger pump of the utility model in the state of filling or cleaning the filling needle is shown.

[0033] Figure 6 A position schematic view of the self-cleaning plunger pump of the utility model in the state of filling or cleaning the filling needle is shown.

[0034] In the figure: 100, self-cleaning plunger pump; 110, pump body; 111, first cavity; 1111, inclined surface; 1112, guide round corner; 112, second cavity; 113, third cavity; 114, feeding port; 115, discharging port; 116, discharge port; 117, mounting port; 118, second sealing ring; 120, plug rod; 130, plug head; 131, first plug head; 132, second plug head; 133, first sealing ring; 200, filling needle; 300, one-way valve. DETAILED DESCRIPTION

[0035] Please refer to Figures 1-6The advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present application.

[0036] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present application are only used to cooperate with the disclosure of the present application for the understanding and reading of those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0037] Unless otherwise defined, the technical terms or scientific terms used herein should have the usual meaning understood by a person skilled in the art to which the present application belongs. The use of "one", "an" or "the" and similar words in the present application does not represent a quantity limitation, but only indicates the existence of at least one. The words "including" or "containing" and the like mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. In the present application, the serial numbers of the components, such as "first", "second", etc. are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" mentioned in the present application includes direct and indirect connections unless otherwise specified.

[0038] In order to avoid confusion with the present application, some technical features known in the art are not described.

[0039] Example one:

[0040] As shown in Figures 1-6 The present embodiment provides a self-cleaning plunger pump 100, which comprises a pump body 110, a plunger rod 120 and a plunger head 130. The pump body 110 comprises a first cavity 111 and a second cavity 112 which are in communication with each other; the inner diameter of the lower half of the first cavity 111 is always greater than the maximum diameter of the plunger head 130, and the volume of the first cavity 111 is greater than the volume of the plunger head 130; the top end of the first cavity 111 is provided with a discharge port 115 for external connection of a filling needle 200; the side end of the first cavity 111 is provided with a feed port 114 for external connection of a material storage tank; the inner diameter of the second cavity 112 is equal to the maximum diameter of the plunger head 130. The plunger rod 120 and the plunger head 130 are arranged in the pump body 110; one end of the plunger rod 120 is connected with the plunger head 130, and the other end extends out of the bottom of the pump body 110 and is externally connected with a driving device such as a cylinder.

[0041] Please refer to Figure 5 andFigure 6 When filling, the plunger rod 120 drives the plunger head 130 to reciprocate in the second cavity 112 under the drive of the drive device, and the downward reciprocation completes the extraction from the storage tank, and the upward reciprocation completes the feeding to the filling needle 200. During the whole filling process, the largest diameter of the plunger head 130 is always in close contact with the wall of the second cavity 112 to ensure that the plunger head 130 can take all the filling liquid on the wall of the second cavity 112 away, but in this process, the plunger head 130 and the wall of the second cavity 112 will leave some filling liquid which is difficult to clean.

[0042] Also referring to Figure 5 and Figure 6 When it is necessary to clean the conveying pipeline and the filling needle 200, the largest diameter of the plunger head 130 is kept in the second cavity 112; the cleaning agent is added into the storage tank to force the cleaning agent to flow quickly from the feeding port 114 into the first cavity 111 and then flow out through the discharging port 115 and the filling needle 200, thereby completing the cleaning of the inner wall of the storage tank, the feeding pipeline, the inner wall of the feeding port 114, the inner wall of the first cavity 111, the inner wall of the second cavity 112, the upper end surface of the plunger head 130, the inner wall of the discharging port 115 and the inner wall of the filling needle 200. However, the filling liquid remaining between the plunger head 130 and the inner wall of the second cavity 112 cannot be cleaned at this time.

[0043] It should be noted that when cleaning the conveying pipeline and the filling needle 200, the largest diameter of the plunger head 130 can be stationary in the second cavity 112; or reciprocate in the second cavity 112 to form a dynamic pressure non-constant pressure in the filling needle 200, so that the cleaning agent can form a mixed flow to increase the cleaning effect.

[0044] Please refer to Figure 2 and Figure 4When the pump body 110 and the plug 130 need to be completely cleaned: the filling needle 200 is sealed, the largest diameter of the plug 130 is kept in the first cavity 111, and does not abut against the inner wall of the first cavity 111; the cleaning agent is added to the storage tank and forced to flow quickly from the inlet 114 into the first cavity 111 to flush the plug 130, because the inner diameter of the first cavity 111 is larger than the inner diameter of the second cavity 112, the cleaning agent entering the first cavity 111 cannot be discharged in time, accumulates in the first cavity 111, and cleans the upper and lower parts of the plug 130. Specifically, the cleaning agent flows annularly between the upper end of the plug 130 and the upper segment of the first cavity 111, forms a circulation zone, and completes flushing of the side of the plug 130 away from the driving device and the inner wall of the upper segment of the first cavity 111; the cleaning agent forms a high-pressure zone between the lower end of the plug 130 and the lower segment of the first cavity 111, and completes flushing of the side of the plug 130 close to the driving device, so that the cleaning of the upper and lower sides of the plug 130 is completed. At the same time, because the plug 130 is smaller than the first cavity 111, the plug 130 does not shield the inner walls of the first cavity 111 and the second cavity 112, and through the impact and flow of the cleaning agent, the waste liquid flowing into the second cavity 112 can be completely cleaned, and the waste liquid generated is discharged from the discharge port 116 at the bottom of the second cavity 112.

[0045] It should be noted that when the pump body 110 and the plug 130 are completely cleaned, the largest diameter of the plug 130 can be stationary in the first cavity 111, further, the plug 130 can be close to the second cavity 112, and the distance between the plug 130 and the top of the first cavity 111 is greater than the distance between the plug 130 and the bottom of the first cavity 111, so as to form a pressure difference, improve the flushing strength of the cleaning agent on the lower end of the plug 130, and increase the cleaning effect. Further, the plug 130 can also reciprocate in the first cavity 111, so that the cleaning agent can form a mixed flow in the first cavity 111, further increasing the cleaning effect.

[0046] In order to further improve the shunt capacity of the plug 130 to the cleaning agent entering the first cavity 111, and improve the turbulence degree of the circulation zone and the impact force of the high-pressure zone, and improve the cleaning effect of the inner wall of the first cavity 111 and the side of the plug 130 away from the driving device, the plug 130 can be designed as an ellipsoid, and the upper segment of the first cavity 111 can be designed as a semi-ellipsoid.

[0047] As Figure 3As shown, to assist in guiding the plug 130 in and out between the first cavity 111 and the second cavity 112, a slope 1111 can be formed between the walls of the first cavity 111, the second cavity 112, and the plug. Simultaneously, the design of the slope 1111 can also improve the circulation effect of the cleaning agent within the first cavity 111, and enhance the cleaning effect of the cleaning agent on the side of the plug 130 near the drive device.

[0048] Furthermore, a guide radius 1112 is formed between the inclined surface 111 and the wall surface of the second cavity 112. The guide radius 1112 can further assist in guiding the plug 130 to enter and exit between the first cavity 111 and the second cavity 112, thereby improving the smoothness of the plug 130 switching cavities.

[0049] like Figure 2 As shown, to facilitate the processing and installation of the stopper 130, the stopper 130 can be designed as a first stopper 131 and a second stopper 132 connected vertically, with the first stopper 131 and the second stopper 132 fixedly connected by a first sealing ring 133; the outer end of the first sealing ring 133 is at the maximum diameter of the stopper 130. The first sealing ring 133 ensures that no liquid leaks between the stopper 130 and the inner wall of the second cavity 112 during the movement of the stopper 130 within the second cavity 112 for filling, thus ensuring accurate and quantitative filling.

[0050] Please refer to Figure 6 To accommodate the second stopper 132 at the bottom of the second cavity 112, maximizing the displacement distance of the stopper 130 within the second cavity 112 and expanding the filling quantity range, a third cavity 113 can be provided at the bottom of the second cavity 112. The inner diameter of the upper section of the third cavity 113 is always larger than the maximum diameter of the stopper 130, and the lower section of the third cavity 113 is designed as a semi-elliptical shape to ensure that it can accommodate the second stopper 132 with a minimal volume design, while also facilitating the discharge of waste liquid. The third cavity 113 can be sealed to the second cavity 112 using clamps and sealing rings; alternatively, the third cavity 113 can be sealed to the second cavity 112 using an integral molding process.

[0051] It should be noted that when the plug 130 is in the third chamber 113, it does not effectively clean the side of the plug 130 near the drive device. This is because the high-pressure liquid entering the pump body 110 has already been depressurized by the second chamber 112. Upon reaching the third chamber 113, it will preferentially exit from the discharge port 116, making backflow unlikely and thus hindering the cleaning of the side of the plug 130 near the drive device. Therefore, the third chamber 113 is not necessary to solve the problem of effective cleaning of the plug 130.

[0052] likeFigure 2 As shown, the lower end of the third cavity 113 is provided with a mounting port 117 for slidingly mounting the plug rod 120 and a discharge port 116 for discharging liquid. A sealing cavity is provided between the mounting port 117 and the third cavity 113, and a second sealing ring 118 is arranged in the sealing cavity to achieve liquid sealing by being sleeved on the plug rod 120. The design of the sealing cavity and the second sealing ring 118 can ensure the sealing of the inner wall of the pump body 110 and the end of the plug rod 120 close to the driving device, so as to avoid leakage of the filling liquid or the cleaning agent from the gap between the inner wall of the pump body 110 and the plug rod 120.

[0053] In summary, the self-cleaning plunger pump provided in the embodiment can make the plug head 130 reciprocate up and down in the first cavity 111 by designing the volume of the first cavity 111 with the inlet port 114 and the outlet port 115 to be greater than the volume of the plug head 130, and the third cavity 113 is provided with the discharge port 116, so that the filling needle 200 can be sealed when the pump body 110 is injected with high-pressure cleaning agent. The cleaning agent entering the first cavity 111 will be divided into a circulating area, a high-pressure area and a pressure relief area after passing through the plug head 130, so that the plug head 130 close to the driving device side and the inner wall of the pump body 110 blocked by the plug head 130 can be completely cleaned without disassembling the pump body 110 and the plug head 130, the overall self-cleaning is completed, and the problems of low production efficiency, affecting the service life of the pump body and being easy to cause secondary pollution caused by disassembling the pump body 110 and the plug head 130 for cleaning are avoided.

[0054] Embodiment two:

[0055] Please review Figure 1 The embodiment provides a filling machine, which comprises the self-cleaning plunger pump as described in the embodiment one. A one-way valve 300 is arranged between the inlet port 114 of the self-cleaning plunger pump and a storage tank of the filling machine, and the one-way valve 300 plays a role of preventing backflow, so that backflow of the filling liquid to the storage tank direction can be prevented.

[0056] Therefore, the present application effectively overcomes the shortcomings of the prior art and has high industrial utilization value. The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.

Claims

1. A self-cleaning plunger pump comprising a pump body (110), a plunger rod (120) and a plunger head (130), said plunger rod (120) and plunger head (130) being disposed within said pump body (110); one end of said plunger rod (120) being connected to said plunger head (130) and the other end extending out of said pump body (110) to a drive means, characterised in that, The pump body (110) is provided with a feeding port (114) at one end away from the driving device; the pump body (110) comprises a first cavity (111), a second cavity (112) and a discharge port (116) which are communicated in sequence from the feeding port (114) to the driving device; The first cavity (111) is always greater than the maximum diameter of the plug head (130) in the inner diameter close to the second cavity (112), and the volume is greater than the volume of the plug head (130); The second cavity (112) is equal to the maximum diameter of the plug head (130) in the inner diameter; When the plug head (130) is cleaned, the plug head (130) is located in the first cavity (111), the cleaning agent flows into the first cavity (111) from the feeding port (114) quickly, and the residual liquid on the plug head (130), the first cavity (111) and the second cavity (112) is flushed, and the waste liquid is discharged from the discharge port (116).

2. The self-cleaning, piston pump of claim 1, wherein, The plug head (130) is in the shape of an ellipsoid, and the half segment of the first cavity (111) away from the driving device is in the shape of a half ellipsoid.

3. A self-cleaning piston pump according to claim 1 or 2, characterized in that The wall surface between the first cavity (111) and the second cavity (112) forms a slope (1111).

4. The self-cleaning, piston pump of claim 3, wherein, The slope (1111) and the wall surface of the second cavity (112) form a guide round corner (1112).

5. The self-cleaning, piston pump of claim 1, wherein, The plug head (130) comprises a first plug head (131) and a second plug head (132), and the first plug head (131) and the second plug head (132) are fixedly connected through a first sealing ring (133); the outer end of the first sealing ring (133) is the maximum diameter of the plug head (130).

6. The self-cleaning, piston pump of claim 1, wherein, The pump body (110) is provided with a mounting port (117) at one end close to the driving device, for slidingly mounting the plug rod (120); a sealing cavity is arranged between the mounting port (117) and the second cavity (112), a second sealing ring (118) is arranged in the sealing cavity, and the second sealing ring (118) is sleeved on the plug rod (120) to realize liquid sealing.

7. The self-cleaning, piston pump of claim 6, wherein, The pump body (110) further comprises a third cavity (113), and the discharge port (116) and the mounting port (117) are arranged on the third cavity (113); the inner diameter of the half segment of the third cavity (113) away from the driving device is always greater than the maximum diameter of the plug head (130), and the volume of the third cavity (113) is at least greater than the volume of the second plug head (132).

8. The self-cleaning, piston pump of claim 7, wherein, The half segment of the third cavity (113) close to the driving device is in the shape of a half ellipsoid.

9. A filling machine characterized in that, The self-cleaning plunger pump comprises the self-cleaning plunger pump according to any one of claims 1-8.

10. The filling machine of claim 9, characterized in that, A one-way valve (300) is arranged between the feeding port (114) and the storage tank.

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