Novel anti-crystallization structure of plunger pump and plunger pump

Abstract

The utility model discloses a novel plunger pump anti -crystallization structure and plunger pump belong to plunger pump technical field, including plunger pump sleeve body and plunger pump plug body, still include pump sleeve anti -crystallization structure and pump plug anti -crystallization structure, pump sleeve anti -crystallization structure sets up on the inner wall of plunger pump sleeve body, and pump plug anti -crystallization structure sets up on the outer wall of plunger pump plug body. The problem of the increasing manufacturing cost and the possible influence on the medicine quality caused by the complicated structure, the high cost and the possible mixing of lubricating water into the medicine liquid of the anti -crystallization device in the prior art is solved. The utility model has reduced the manufacturing cost and material cost of plunger pump, discarded the anti -crystallization mode of additional lubricating water, avoided the risk of mixing lubricating water into the filling medicine liquid, and fundamentally eliminated the medicine concentration deviation and quality risk caused by the introduction of lubricating water.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically to a novel anti-crystallization structure for a plunger pump and the plunger pump itself. Background Technology

[0002] Plunger pumps are high-precision metering pumps widely used in pharmaceuticals and food processing for precise volumetric filling of liquids. Their structure mainly consists of a plunger sleeve, a plunger plug, and a component responsible for switching the liquid flow path. There is a certain gap between the plunger sleeve and the plunger plug. When the plunger discharges liquid, a small amount of liquid adheres to its surface. When the plunger plug re-enters the plunger sleeve, the remaining liquid accumulates on the end face of the sleeve. This leads to the precipitation and accumulation of solute crystals on the end face, increasing the plunger's resistance, causing overheating, and even jamming. To address this, some plunger pumps are equipped with anti-crystallization devices. These devices inject lubricating water between the plunger and the sleeve through multiple lubrication water channels and nozzles in the pump body to dilute or flush away the crystals.

[0003] However, this type of anti-crystallization plunger pump still has some problems in practical use. On the one hand, multiple channels and nozzles for adding and discharging lubricating water need to be added to the pump body, making the structure complex. It also requires additional lubricating water storage tanks and a large number of silicone connecting pipes, which significantly increases the manufacturing cost of the plunger pump. On the other hand, since it is impossible to effectively monitor and verify whether lubricating water enters the filling solution, it is difficult to determine whether the concentration of the solution has been diluted due to the mixing of lubricating water, which poses a risk to the quality of the medicine.

[0004] Therefore, how to provide a novel anti-crystallization structure for plunger pumps and solve the defects in existing technologies is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides a novel anti-crystallization structure for a plunger pump to solve the problems in the prior art, such as increased manufacturing costs and potential impact on drug quality caused by the complex structure and high cost of the anti-crystallization device, as well as the possibility of lubricating water mixing into the drug solution.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses a novel anti-crystallization structure for a plunger pump, comprising a plunger pump sleeve body and a plunger pump plug body, and further comprising: An anti-crystallization structure for the pump sleeve is provided on the inner wall of the plunger pump sleeve body; An anti-crystallization structure for the pump plug is provided on the outer wall of the plunger pump plug body.

[0007] Furthermore, the pump sleeve anti-crystallization structure includes: An anti-crystallization sealing section is formed on the inner side wall at the upper end of the plunger pump sleeve body; The storage section is located on the inner wall of the plunger pump sleeve body and below the anti-crystallization sealing section. The inner diameter of the storage section is larger than the inner diameter of the plunger pump sleeve body. A liquid outlet is provided through the inner wall of the storage section.

[0008] Furthermore, the pump plug anti-crystallization structure includes: An anti-crystallization sealing zone is provided on the outer wall of the upper end of the plunger pump body; A hollow non-contact area is formed on the outer wall of the plunger pump body and located below the anti-crystallization sealing section. The diameter of the hollow non-contact area is smaller than the diameter of the plunger pump body.

[0009] Furthermore, the length of the hollow non-contact area is greater than the length of the storage section.

[0010] Furthermore, the length of the anti-crystallization sealing zone is less than the sum of the lengths of the anti-crystallization sealing section and the storage section.

[0011] Furthermore, the inner diameter of the anti-crystallization sealing section is equal to the inner diameter of the plunger pump sleeve body.

[0012] Furthermore, the diameter of the anti-crystallization sealing zone is equal to the diameter of the plunger pump body.

[0013] According to a second aspect of this utility model: A grooved valve type plunger pump includes the novel plunger pump anti-crystallization structure, wherein the plunger pump sleeve body is a grooved valve type plunger pump sleeve, and the plunger pump plug body is a grooved valve type plunger pump plug.

[0014] A rotary valve plunger pump includes the novel plunger pump anti-crystallization structure, wherein the plunger pump sleeve body is a rotary valve plunger pump sleeve, and a rotary valve is rotatably connected to one end of the rotary valve plunger pump sleeve body.

[0015] This utility model has the following advantages: This invention, by incorporating anti-crystallization structures in the pump sleeve and pump plug, directs the liquid and deposits adhering to the outer wall of the plunger pump plug to the storage section and discharge them through the liquid outlet during operation. This prevents liquid residues from accumulating and crystallizing on the end face of the plunger pump sleeve, eliminating the problems of increased plunger movement resistance, overheating, and even jamming caused by solute crystallization. This significantly improves the operational reliability and service life of the plunger pump. Furthermore, the novel anti-crystallization structure of this application eliminates the complex lubricating water channels, nozzles, external storage tanks, and numerous silicone connecting pipes found in existing technologies, greatly simplifying the overall structure of the plunger pump and significantly reducing manufacturing and material costs. Simultaneously, it reduces the increased exposure points caused by liquid channels and connecting pipes, lowering the risk of cross-contamination and better meeting the stringent requirements for aseptic filling in the pharmaceutical and food industries.

[0016] By setting a storage section with an inner diameter larger than the constant-volume end of the plunger pump sleeve and a hollow non-contact area with a reduced diameter on the plunger pump plug, liquid residues accumulated in the storage section only come into contact with the hollow non-contact area of ​​the plunger pump plug, and not with the anti-crystallization sealing area of ​​the plunger pump plug or the anti-crystallization sealing section of the plunger pump sleeve. This effectively prevents liquid residues from being carried out to the sealing mating surface, ensuring the cleanliness of the sealing area. Thus, the purpose of preventing crystallization can be achieved without the need for external lubricating water rinsing. Furthermore, by eliminating the need for external lubricating water to prevent crystallization, the risk of lubricating water mixing into the filling solution is avoided. There is no need for additional verification of whether lubricating water enters the solution or dilutes the solution concentration, fundamentally eliminating the drug concentration deviation and quality risk caused by the introduction of lubricating water. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 A cross-sectional view of the novel anti-crystallization structure of the plunger pump provided by this utility model; Figure 2 Cross-sectional view of the anti-crystallization structure of the pump sleeve provided by this utility model; Figure 3 Cross-sectional view of the anti-crystallization structure of the pump plug provided by this utility model; Figure 4 Diagram showing the usage status of the novel plunger pump anti-crystallization structure provided by this utility model; Figure 5 A cross-sectional view of the grooved valve plunger pump provided by this utility model; Figure 6 Diagram showing the usage status of the grooved valve plunger pump provided by this utility model; Figure 7 A cross-sectional view of the rotary valve plunger pump provided by this utility model; Figure 8 A diagram showing the usage status of the rotary valve plunger pump provided by this utility model.

[0020] In the diagram: 1. Plunger pump sleeve body; 2. Plunger pump plug body; 31. Anti-crystallization sealing section; 32. Storage section; 33. Liquid outlet; 41. Anti-crystallization sealing area; 42. Hollow non-contact area; 5. Rotary valve. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please refer to Figures 1-4 The present invention discloses a novel anti-crystallization structure for a plunger pump, as follows: Figure 1 , Figure 2 , Figure 3 As shown, the device includes a plunger pump sleeve body 1 and a plunger pump plug body 2, as well as a pump sleeve anti-crystallization structure and a pump plug anti-crystallization structure. The pump sleeve anti-crystallization structure is disposed on the inner wall of the plunger pump sleeve body 1, and the pump plug anti-crystallization structure is disposed on the outer wall of the plunger pump plug body 2.

[0023] In this embodiment, the plunger pump sleeve body 1 and the plunger pump plug body 2 are the basic components of a plunger pump in the prior art, as are known to those skilled in the art. The materials of the plunger pump sleeve body 1 and the plunger pump plug body 2 may be wear-resistant stainless steel, ceramic, titanium alloy, or other metal or non-metal materials. The lower end of the plunger pump sleeve body 1 is the plunger constant-volume end (a basic structure in the prior art, which will not be described in detail here), and the upper end of the plunger pump sleeve body 1 is provided with a pump sleeve anti-crystallization structure.

[0024] By setting up anti-crystallization structures for the pump sleeve and pump plug, the liquid and deposits adhering to the outer wall of the plunger pump plug are directed to the storage section 32 and discharged through the liquid outlet 33 during the operation of the plunger pump. This avoids the accumulation and crystallization of liquid residues on the end face of the plunger pump sleeve, eliminates the problems of increased plunger movement resistance, overheating, or even jamming caused by solute crystallization, and significantly improves the operational reliability and service life of the plunger pump.

[0025] By setting a storage section 32 with an inner diameter larger than the constant volume end of the plunger pump sleeve and a hollow non-contact area 42 with a reduced diameter on the plunger pump plug, the liquid residue accumulated in the storage section 32 only contacts the hollow non-contact area 42 of the plunger pump plug, and does not contact the anti-crystallization sealing area 41 of the plunger pump plug or the anti-crystallization sealing section 31 of the plunger pump sleeve. This effectively prevents the liquid residue from being carried out to the sealing mating surface, ensuring the cleanliness of the sealing area, and thus achieving the purpose of anti-crystallization without the need for external lubricating water flushing.

[0026] like Figure 1 , Figure 2 As shown, the anti-crystallization structure of the pump sleeve includes an anti-crystallization sealing section 31, a storage section 32, and a liquid outlet 33. The anti-crystallization sealing section 31 is formed on the inner wall of the upper end of the plunger pump sleeve body 1. The storage section 32 is formed on the inner wall of the plunger pump sleeve body 1 and is located below the anti-crystallization sealing section 31. The inner diameter of the storage section 32 is larger than the inner diameter of the plunger pump sleeve body 1. The liquid outlet 33 is formed through the inner wall of the storage section 32. Preferably, the inner diameter of the anti-crystallization sealing section 31 is equal to the inner diameter of the plunger pump sleeve body 1.

[0027] In this embodiment, the shape and location of the anti-crystallization sealing section 31, the storage section 32, and the liquid outlet 33 are as follows: Figure 2 As shown. The anti-crystallization structure of the pump sleeve in this application includes a storage section 32 that is larger than the inner diameter of the constant volume end of the plunger. The inner diameter of the storage section 32 is usually 0.3-5 mm larger than the inner diameter of the constant volume end of the plunger; and a liquid outlet 33, which can be externally connected to a discharge silicone tube or flexible hose (or externally receive the collected liquid cavity without external discharge, or not have a discharge nozzle, all of which are within the scope of protection of this application).

[0028] The length of the storage section 32 is typically between 3-60 mm, with the specific length determined by the plunger pump's stroke, usually 1-10 mm longer than the plunger pump's stroke. The length of the storage section 32 can also exceed 60 mm; when used in a rotary valve 5 type plunger pump, since the rotary valve 5 does not move up and down, the length can be 3-8 mm; when used in a plunger pump where the plunger body 2 and the plunger pump sleeve body 1 move up and down relative to each other, the length of the storage section 32 is determined based on the pump's stroke. The length of the anti-crystallization sealing section 31 is typically between 10-25 mm. To shorten the overall length of the plunger pump, the anti-crystallization sealing section 31 should be compressed as much as possible while ensuring a tight seal.

[0029] like Figure 1 , Figure 3 As shown, the anti-crystallization structure of the pump plug includes an anti-crystallization sealing area 41 and a hollow non-contact area 42. The anti-crystallization sealing area 41 is disposed on the outer side wall of the upper end of the plunger pump body 2, and the hollow non-contact area 42 is formed on the outer side wall of the plunger pump body 2 and disposed below the anti-crystallization sealing area 41. The diameter of the hollow non-contact area 42 is smaller than the diameter of the plunger pump body 2. Preferably, the diameter of the anti-crystallization sealing area 41 is equal to the diameter of the plunger pump body 2.

[0030] In this embodiment, the plunger pump body 2 is used in conjunction with the plunger pump sleeve body 1. The plunger pump body 2 has been lengthened, and from bottom to top, it consists of a filling metering sealing area (which is the basic structure in the prior art, used to cooperate with the plunger volume-fixing end at the lower end of the plunger pump sleeve body 1, and will not be described in detail here), a hollow non-contact area 42, and an anti-crystallization sealing area 41.

[0031] In one possible embodiment, such as Figure 4 As shown, the length of the hollow non-contact area 42 is greater than the length of the storage section 32.

[0032] In one possible embodiment, such as Figure 1 As shown, the length of the anti-crystallization sealing area 41 is less than the sum of the lengths of the anti-crystallization sealing section 31 and the storage section 32.

[0033] This application adds two functional sections to the plunger pump sleeve body 1—an anti-crystallization sealing section 31 and a storage section 32; correspondingly, it adds two functional areas to the plunger pump body 2—an anti-crystallization sealing area 41 and a hollow non-contact area 42. Based on the maximum filling stroke, the length of the storage section 32 is slightly longer than the maximum filling stroke; the length of the hollow non-contact area 42 is slightly longer than the length of the storage section 32 (typically 1-10 mm); the length of the anti-crystallization sealing area 41 is smaller than the sum of the lengths of the storage section 32 and the anti-crystallization sealing section 31 (typically 1-3 mm smaller).

[0034] Through the above structural design and size matching, the liquid accumulated in the storage section 32 can be prevented from contacting the anti-crystallization sealing area 41 at the upper end of the plunger pump body 2, and can only contact the hollow non-contact area 42 on the plunger pump body 2. This prevents the liquid from being carried out outside the anti-crystallization sealing section 31. The liquid formed by the accumulation of water film can be discharged through the liquid outlet 33, thereby reducing the accumulation of liquid in the storage section 32 and achieving the effect of preventing crystallization.

[0035] It is worth noting that: 1. Existing anti-crystallization devices use intermittent water supply and drainage methods, which require manual operation and are difficult to control. However, the anti-crystallization structure of the pump sleeve and the anti-crystallization structure of the pump plug in this application are installed inside the plunger pump and move synchronously with the operation of the plunger pump. Therefore, no manual operation is required, which reduces labor intensity.

[0036] 2. Existing anti-crystallization devices require the addition of a lubricating water storage tank and rinsing with lubricating water during use. However, the anti-crystallization structures for the pump sleeve and pump plug in this application do not use cleaning water, which reduces costs and avoids the risk of cross-contamination.

[0037] According to a second aspect of this utility model: The anti-crystallization structure for the pump sleeve and the anti-crystallization structure for the pump plug of this application can be applied to the following different types of plunger pumps.

[0038] like Figure 5 As shown, a grooved valve type plunger pump includes a novel plunger pump anti-crystallization structure, wherein the plunger pump sleeve body 1 is a grooved valve type plunger pump sleeve, and the plunger pump plug body 2 is a grooved valve type plunger pump plug.

[0039] In this embodiment, the plunger pump body 2 is provided with a slot valve for switching the liquid channel. Figure 6 This is a diagram showing the operating status of a grooved valve type plunger pump.

[0040] like Figure 7 As shown, a rotary valve plunger pump includes a novel anti-crystallization structure for the plunger pump. The plunger pump sleeve body 1 is a rotary valve plunger pump sleeve, and a rotary valve 5 is rotatably connected to one end of the rotary valve plunger pump sleeve.

[0041] In this embodiment, the anti-crystallization structure of the pump sleeve is inverted at the lower end of the plunger pump sleeve body 1, the plunger pump body 2 is inverted at the lower end of the plunger pump sleeve body 1, and a rotary valve 5 for switching liquid channels is provided at the upper end of the plunger pump sleeve body 1. Figure 8 This is a diagram showing the operating status of a rotary valve piston pump.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A novel anti-crystallization structure for a plunger pump, comprising a plunger pump sleeve body (1) and a plunger pump plug body (2), characterized in that, Also includes: The anti-crystallization structure of the pump sleeve is provided on the inner wall of the plunger pump sleeve body (1); The anti-crystallization structure of the pump plug is provided on the outer wall of the plunger pump plug body (2).

2. The novel plunger pump anti-crystallization structure as described in claim 1, characterized in that, The anti-crystallization structure of the pump sleeve includes: Anti-crystallization sealing section (31) is provided on the inner side wall of the upper end of the plunger pump sleeve body (1); The storage section (32) is located on the inner wall of the plunger pump sleeve body (1) and below the anti-crystallization sealing section (31). The inner diameter of the storage section (32) is larger than the inner diameter of the plunger pump sleeve body (1). A liquid outlet (33) is provided through the inner wall of the storage section (32).

3. The novel plunger pump anti-crystallization structure as described in claim 2, characterized in that, The anti-crystallization structure of the pump plug includes: The anti-crystallization sealing area (41) is provided on the outer side wall of the upper end of the plunger pump body (2); A hollow non-contact area (42) is formed on the outer side wall of the plunger pump body (2) and is located below the anti-crystallization sealing area (41) section. The diameter of the hollow non-contact area (42) is smaller than the diameter of the plunger pump body (2).

4. The novel plunger pump anti-crystallization structure as described in claim 3, characterized in that, The length of the hollow non-contact area (42) is greater than the length of the storage section (32).

5. The novel plunger pump anti-crystallization structure as described in claim 3, characterized in that, The length of the anti-crystallization sealing area (41) is less than the sum of the lengths of the anti-crystallization sealing section (31) and the storage section (32).

6. The novel plunger pump anti-crystallization structure as described in claim 2, characterized in that, The inner diameter of the anti-crystallization sealing section (31) is equal to the inner diameter of the plunger pump sleeve body (1).

7. The novel plunger pump anti-crystallization structure as described in claim 3, characterized in that, The diameter of the anti-crystallization sealing area (41) is equal to the diameter of the plunger pump body (2).

8. A plunger pump, comprising the novel anti-crystallization structure of the plunger pump according to any one of claims 1-7, characterized in that, The plunger pump sleeve body (1) is a grooved valve plunger pump sleeve, and the plunger pump plug body (2) is a grooved valve plunger pump plug.

9. A plunger pump, comprising the novel anti-crystallization structure of the plunger pump according to any one of claims 1-7, characterized in that, The plunger pump sleeve body (1) is a rotary valve type plunger pump sleeve, and a rotary valve (5) is rotatably connected to one end of the rotary valve type plunger pump sleeve.

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