Groove valve type ceramic pump

Abstract

The utility model discloses a groove valve type ceramic pump, which belongs to the technical field of plunger pumps and comprises a ceramic sleeve, a groove valve type metering rod, an amplification sleeve, a connecting nut and an extension sleeve, a plurality of liquid channel holes are arranged on the side wall of the ceramic sleeve, the groove valve type metering rod is movably connected inside the ceramic sleeve, the amplification sleeve is detachably mounted on the outer side wall of the ceramic sleeve, and the extension sleeve is connected with the groove valve type metering rod. A plurality of connecting holes are formed in the outer side wall of the amplification sleeve, liquid nozzles are connected into the connecting holes in a threaded mode, the outer side wall of the lower end of the ceramic sleeve is sleeved with the connecting nut, and the extension sleeve is installed at an opening in the lower end of the ceramic sleeve through the connecting nut. The ceramic inner sleeve is arranged, so that the risk of hard collision or friction between ceramic and metal is avoided, and the smoothness and attractiveness of the ceramic surface are kept; and through the arrangement of the connecting nut, the extension sleeve becomes a module which can be independently detached and replaced, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically to a grooved valve type ceramic pump. Background Technology

[0002] A ceramic plunger pump is a positive displacement pump that uses ceramic materials to manufacture its key moving parts. Its core components typically include a ceramic metering rod and a matching pump sleeve. Due to its extremely high hardness, excellent wear resistance, good corrosion resistance, and bioinertness, ceramic materials are widely used in fields with extremely high requirements for cleanliness, wear resistance, and corrosion resistance, such as high-precision fluid transport and metering applications in the pharmaceutical, food, and chemical industries. These pumps typically achieve liquid intake and discharge through the reciprocating motion of the plunger within the pump sleeve, in conjunction with the opening and closing of valves. Structural reliability, sealing performance, and material stability are key indicators for evaluating product performance.

[0003] However, existing technologies, especially multi-stage ceramic pumps based on improvements to traditional stainless steel pump structures, still present some problems in practical applications. Firstly, the extension sleeve used to accommodate the metering rod is typically a stainless steel blind-hole structure. During assembly, disassembly, and operation, the ceramic metering rod is prone to hard contact or collision with the metal inner wall. This can not only cause metal particles to adhere to the ceramic surface, resulting in a loss of luster and affecting aesthetics, but also generate contaminating particles due to friction during long-term operation. Secondly, the existing extension sleeve integrates a drain port. Due to limitations in overall dimensions, the large nut used to connect to the pump body must be pre-fitted before welding the drain nozzle. This assembly sequence leads to complex manufacturing processes, and the large nut cannot be separated from the extension sleeve during use and maintenance. Once the large nut is damaged, it cannot be replaced separately; the extension sleeve and the large nut must be discarded as a single component, significantly increasing maintenance costs and inconvenience for users.

[0004] Therefore, how to provide a slotted valve type ceramic pump that overcomes the shortcomings of the existing technology 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 slotted valve type ceramic pump to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a slotted valve type ceramic pump, comprising:

[0008] The ceramic sleeve has several liquid channel holes on its side wall;

[0009] A slotted valve-type metering rod is movably connected inside the ceramic sleeve;

[0010] An amplification sleeve is detachably mounted on the outer wall of the ceramic sleeve. Several connection holes are provided on the outer wall of the amplification sleeve, and liquid nozzles are threaded into the connection holes.

[0011] A connecting nut is fitted onto the outer side wall of the lower end of the ceramic sleeve;

[0012] An extension sleeve is installed at the lower opening of the ceramic sleeve via a connecting nut.

[0013] Furthermore, the extension sleeve includes:

[0014] The outer jacket is extended and has blind holes inside;

[0015] A ceramic inner sleeve is disposed on the inner side wall of the extended outer sleeve;

[0016] A sewage discharge channel is provided on the outer wall of the extended jacket, and the sewage discharge channel is connected to a blind hole;

[0017] A connecting component is located at the lower end of the extended outer cover.

[0018] Furthermore, an outer wall step is formed on the outer side wall of the ceramic sleeve, and the connecting nut is sleeved on the outer side wall of the ceramic sleeve through the outer wall step. The inner side wall of the connecting nut is provided with an internal thread, and the outer side wall of the extension sleeve is provided with an external thread. The extension sleeve is threadedly connected to the connecting nut.

[0019] Furthermore, an alignment mounting position is provided on the bottom surface of the outer wall step, and a positioning structure is provided on the upper surface of the extended jacket.

[0020] Furthermore, a positioning plane is provided on the outer side wall of the ceramic sleeve, and a positioning hole is provided on the outer side wall of the expansion sleeve. A positioning screw is threaded into the positioning hole, and the positioning screw abuts against the positioning plane.

[0021] Furthermore, the ceramic sleeve forms a sealing plane around the outer wall of the liquid channel hole.

[0022] Furthermore, the grooved valve type metering rod includes a fixed connecting section, a clearance section, a guide section, a small step section, and a large step section arranged sequentially from top to bottom. An annular groove for installing an O-ring is provided on the outer wall of the fixed connecting section. A positioning pin is provided between the fixed connecting section and the clearance section. A multi-lobed guide structure is provided on the outer wall of the guide section. A grooved valve is provided on the outer wall of the small step section.

[0023] This utility model has the following advantages:

[0024] This invention, by setting a ceramic inner sleeve inside the extension sleeve, ensures that the grooved valve metering rod only contacts the ceramic inner sleeve during operation and disassembly, avoiding the risk of hard collision or friction between ceramic and metal, eliminating the problem of metal particles adhering to the ceramic rod or generating contaminant particles due to collision, ensuring the cleanliness of the fluid, and maintaining the smoothness and aesthetics of the ceramic surface.

[0025] By incorporating a connecting nut, along with the stepped outer wall on the ceramic sleeve and the external thread on the extension sleeve, the extension sleeve becomes an independently detachable and replaceable module. When the connecting nut or the extension sleeve is damaged, the entire unit can be replaced directly, rather than being scrapped, significantly reducing maintenance costs.

[0026] By setting up an expansion sleeve, the assembly stress caused by the interference fit between the traditional stainless steel sleeve and the ceramic sleeve is avoided, as well as the huge internal stress caused by the difference in thermal expansion coefficients between ceramic and metal during high-temperature sterilization. This significantly reduces the risk of ceramic sleeve breakage during assembly and use, and extends the service life of core components. Attached Figure Description

[0027] 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.

[0028] 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.

[0029] Figure 1 A cross-sectional view of the slotted valve ceramic pump provided by this utility model;

[0030] Figure 2 Provided by this utility model Figure 1 Enlarged view of the A-structure;

[0031] Figure 3 A three-dimensional view of the ceramic sleeve structure provided by this utility model;

[0032] Figure 4 The structural diagram of the extension sleeve provided by this utility model;

[0033] Figure 5 The structural diagram of the slotted valve type metering rod provided by this utility model.

[0034] In the diagram: 1. Ceramic sleeve; 11. Liquid channel hole; 12. Sealing plane; 13. Outer wall step; 14. Positioning plane; 131. Alignment mounting position; 2. Groove valve type metering rod; 21. Fixed connection section; 22. Clearance section; 23. Guide section; 24. Small step section; 25. Large step section; 26. Annular groove; 27. Positioning pin; 28. Multi-lobed guide structure; 29. ​​Groove valve; 3. Extension sleeve; 31. Connecting hole; 32. Liquid nozzle; 33. Positioning hole; 34. Positioning screw; 4. Connecting nut; 41. Internal thread; 5. Extension sleeve; 51. Extension outer sleeve; 511. External thread; 512. Positioning structure; 52. Blind hole; 53. Ceramic inner sleeve; 54. Drainage channel; 55. Connecting component. Detailed Implementation

[0035] 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.

[0036] Please refer to Figures 1-5 The grooved valve type ceramic pump disclosed in this utility model will now be described. This utility model consists of 5 parts, as follows: Figure 1 As shown, the device includes a ceramic sleeve 1, a grooved valve-type metering rod 2, an amplification sleeve 3, a connecting nut 4, and an extension sleeve 5. The ceramic sleeve 1 has several liquid channel holes 11 on its side wall. The grooved valve-type metering rod 2 is movably connected inside the ceramic sleeve 1. The amplification sleeve 3 is detachably installed on the outer side wall of the ceramic sleeve 1. The amplification sleeve 3 has several connecting holes 31 on its outer side wall. The connecting holes 31 are internally threaded with liquid nozzles 32. The connecting nut 4 is sleeved on the outer side wall at the lower end of the ceramic sleeve 1. The extension sleeve 5 is installed at the lower end opening of the ceramic sleeve 1 through the connecting nut 4.

[0037] In this embodiment, the ceramic sleeve 1 is a double-stepped hollow tube with two steps in its inner hole: a large lower step and a small upper step. The diameters of the large and small steps are determined based on the required filling volume. The product of the difference in the cross-sectional area of ​​the two steps and the maximum filling stroke is the maximum filling volume of the ceramic pump. The large lower step and the small upper step have a structure with high coaxiality, excellent cylindricity, and extremely low roughness.

[0038] Similar to a typical stainless steel pump, the ceramic sleeve 1 also has three liquid channel holes 11 at the same position—filling channel hole, filling discharge hole, and CIP / SIP channel hole; in addition, two grooves are designed, which extend downward from the filling channel hole and the filling discharge hole to about half of the small step, but cannot extend to the top of the large step, to ensure sufficient sealing surface, which is usually not less than 25mm.

[0039] Preferably, a positioning plane 14 is formed on the outer wall of the ceramic sleeve 1, and a positioning hole 33 is formed on the outer wall of the expansion sleeve 3. A positioning screw 34 is internally threaded into the positioning hole 33 and abuts against the positioning plane 14. Preferably, a sealing plane 12 is formed on the outer wall of the ceramic sleeve 1 around the liquid channel hole 11.

[0040] like Figure 1 As shown, the outer wall of ceramic sleeve 1 is also designed with four stepped sections, from top to bottom: step six, step seven, step eight, and step nine. The dimensions are as follows: step six is ​​the smallest; the outer diameter of step seven is larger than that of step six; the outer diameter of step eight is 4-8mm larger than that of step seven; and the outer diameter of step nine is similar to or the same as that of step seven. Figure 3 As shown, on the three liquid channel holes 11 on the outer wall of the sixth step, we have machined the outer wall into a platform, namely, the sealing plane 12; in addition, a positioning plane 14 has been added.

[0041] Around step six, we added an amplification sleeve 3 (usually made of stainless steel or other metals, PEEK or other plastics). Its length is equal to that of step six, but its inner diameter is slightly larger (usually 0.05-0.10 mm larger) than the outer diameter of step six. Step six can be inserted into amplification sleeve 3 with only a small gap. For aesthetic purposes, weight reduction, and space minimization, this amplification sleeve 3 is usually machined into a polygon (equilateral or non-equilateral). A connecting hole 31 is provided at a position corresponding to the liquid channel hole 11 on step six. Typically, the connecting hole 31 is internally threaded, and the liquid nozzle 32 is externally threaded, sealed with an O-ring. This connects the liquid channel hole 11 of the ceramic sleeve 1 to the liquid nozzle 32. Correspondingly, there is also a hole with internal threads at a position corresponding to the positioning plane 14, where a positioning screw 34 is installed, combining the ceramic sleeve 1 and amplification sleeve 3 into one unit. Even when all three liquid nozzles 32 are removed, the ceramic sleeve 1 and amplification sleeve 3 remain a single assembly.

[0042] By setting up the expansion sleeve 3, the assembly stress caused by the interference fit between the traditional stainless steel sleeve and the ceramic sleeve 1 is avoided, as well as the huge internal stress caused by the difference in thermal expansion coefficients between ceramic and metal during high-temperature sterilization. This significantly reduces the risk of the ceramic sleeve 1 breaking during assembly and use, and extends the service life of the core component.

[0043] like Figure 5 As shown, the grooved valve type metering rod 2 includes a fixed connection section 21, a clearance section 22, a guide section 23, a small step section 24, and a large step section 25 arranged sequentially from top to bottom. An annular groove 26 for installing an O-ring is provided on the outer wall of the fixed connection section 21. A positioning pin 27 is provided between the fixed connection section 21 and the clearance section 22. A multi-lobed guide structure 28 is provided on the outer wall of the guide section 23. A grooved valve 29 is provided on the outer wall of the small step section 24.

[0044] The grooved valve-type metering rod 2 of this application is a precision-machined multi-step component, the structure of which is the same as that of our company's authorized patent (publication number CN223621778U). From bottom to top, it consists of a large step section 25, a small step section 24, a guide section 23, a clearance section 22, and a fixed connection section 21. Among them, the geometric dimensions of the large step section 25 and the small step section 24 are crucial. These two sections are sealing surfaces with extremely high concentricity and cylindricity. Their outer diameters are several micrometers smaller than the inner diameters of the large step at the bottom and the small step at the top inside the ceramic sleeve 1 (the fitting clearance is several micrometers, about 0.005mm). The length and diameter of the large step section 25, the small step section 24, the large step at the bottom and the small step at the top inside the ceramic sleeve 1 are determined according to the filling volume and the metering requirements to achieve CIP / SIP functions.

[0045] Correspondingly, an axial groove, called groove valve 29, is opened on the small stepped section 24. Its function is to selectively open the liquid channel when switching liquid channels. To realize the CIP / SIP function, an annular groove 26 is opened at the bottom of the fixed connection section 21, with an O-ring seal inside. When the pump is in the CIP / SIP position, the seal ring contacts the top of the small stepped section inside the ceramic sleeve 1 and performs a sealing function. Normally, the fixed connection section 21 is made of stainless steel, and other parts are made of ceramic. The two are made into a whole by excessive fit. To prevent the two from loosening, a positioning pin 27 is added.

[0046] like Figure 4 As shown, the extension sleeve 5 includes an extension outer sleeve 51, a ceramic inner sleeve 53, a drain channel 54, and a connecting component 55. The extension outer sleeve 51 has a blind hole 52 inside. The ceramic inner sleeve 53 is disposed on the inner side wall of the extension outer sleeve 51. The drain channel 54 is disposed on the outer side wall of the extension outer sleeve 51 and is connected to the blind hole 52. The connecting component 55 is disposed at the lower end of the extension outer sleeve 51.

[0047] In this embodiment, the extension sleeve 5 has a structure basically the same as that of the stainless steel pump. The extension sleeve 5 is a hollow blind hole sleeve, and its total length and the depth of the internal blind hole 52 need to be determined according to the requirements of CIP / SIP function implementation. Usually, the inner diameter of the blind hole 52 is about 0.02mm larger than the diameter of the large stepped section 25 on the groove valve type metering rod 2. We added a ceramic inner sleeve 53 with edge fitting, which is used to prevent stainless steel from adhering to the ceramic when it comes into contact with stainless steel. There is a drain channel 54 at the lower end of the blind hole 52, which is the channel for draining cleaning water and sterilization steam during CIP / SIP. This channel is usually made into a connector that can be connected to a pressure-resistant hose. At the bottom of the extension sleeve 5, there is a connecting component 55, which is connected to the filling motor drive. The concentricity of the extension sleeve 5 and the ceramic sleeve 1 is crucial. Otherwise, it is easy to cause jamming and unevenness during filling and when the CIP / SIP function is implemented, resulting in unstable filling volume or damage to the pump.

[0048] By setting a ceramic inner sleeve 53 inside the extension sleeve 5, the groove valve type metering rod 2 only contacts the ceramic inner sleeve 53 during operation and disassembly, avoiding the risk of hard collision or friction between ceramic and metal, eliminating the problem of metal particles adhering to the ceramic rod or generating contaminant particles due to collision, ensuring the cleanliness of the fluid, and maintaining the smoothness and aesthetics of the ceramic surface.

[0049] Preferred, such as Figures 1-4 As shown, an alignment mounting position 131 is provided on the bottom surface of the outer wall step 13, and a positioning structure 512 is provided on the upper surface of the extended jacket 51.

[0050] The lower end of the ceramic sleeve 1 and the upper end of the extension sleeve 5 are both provided with matching positioning structures. These positioning structures are usually one convex and one concave, which we call the alignment mounting position 131 and the positioning structure 512. After the two are matched, the three channel holes on the ceramic sleeve 1 and the connecting part 55 of the extension sleeve 5 can form a certain angle to meet the needs of its function.

[0051] like Figure 1 As shown, an outer wall step 13 is formed on the outer side wall of the ceramic sleeve 1. The connecting nut 4 is sleeved on the outer side wall of the ceramic sleeve 1 through the outer wall step 13. The inner side wall of the connecting nut 4 is provided with an internal thread 41. The outer side wall of the extension sleeve 51 is provided with an external thread 511. The extension sleeve 51 is threadedly connected to the connecting nut 4.

[0052] In this embodiment, the connecting nut 4 serves to connect the ceramic sleeve 1 and the extension sleeve 5. Unlike traditional structures, the connecting nut 4 is not fitted onto the extension sleeve 5; instead, it is fitted onto the ceramic sleeve 1, positioned between the amplification sleeve 3 and the outer wall step 13. The internal thread 41 on the inner sidewall of the connecting nut 4 matches the external thread 511 on the outer side of the extension sleeve 5. One end of the connecting nut 4 presses against the upper end of the outer wall step 13, thus connecting the ceramic sleeve 1 and the extension sleeve 5 into a detachable assembly for easy maintenance, replacement of parts, or online cleaning. It is important to note that the connecting nut 4 must be fitted downwards onto the ceramic sleeve 1 before the amplification sleeve 3 can be installed.

[0053] By setting the connecting nut 4, and cooperating with the outer wall step 13 set on the ceramic sleeve 1 and the external thread 511 set on the extension sleeve 5, the extension sleeve 5 becomes an independently detachable and replaceable module. When the connecting nut 4 or the extension sleeve 51 is damaged, there is no need to scrap the whole, and the damaged single part can be directly replaced, which greatly reduces maintenance costs.

[0054] 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 grooved valve type ceramic pump, characterized in that, include: The ceramic sleeve (1) has several liquid channel holes (11) on its side wall. The grooved valve type metering rod (2) is movably connected inside the ceramic sleeve (1); The amplification sleeve (3) is detachably installed on the outer side wall of the ceramic sleeve (1). The outer side wall of the amplification sleeve (3) is provided with several connection holes (31), and the connection holes (31) are internally threaded with liquid nozzles (32). The connecting nut (4) is sleeved on the outer side wall of the lower end of the ceramic sleeve (1); The extension sleeve (5) is installed at the lower opening of the ceramic sleeve (1) by means of the connecting nut (4).

2. The slotted valve type ceramic pump as described in claim 1, characterized in that, The extension sleeve (5) includes: The extended outer cover (51) has blind holes (52) inside. A ceramic inner sleeve (53) is disposed on the inner side wall of the extended outer sleeve (51); A sewage discharge channel (54) is provided on the outer wall of the extended outer sleeve (51), and the sewage discharge channel (54) is connected to the blind hole (52); A connecting component (55) is provided at the lower end of the extended outer cover (51).

3. The slotted valve type ceramic pump as described in claim 2, characterized in that, An outer wall step (13) is formed on the outer side wall of the ceramic sleeve (1). The connecting nut (4) is sleeved on the outer side wall of the ceramic sleeve (1) through the outer wall step (13). The inner side wall of the connecting nut (4) is provided with an internal thread (41). The outer side wall of the extension sleeve (51) is provided with an external thread (511). The extension sleeve (51) is threadedly connected to the connecting nut (4).

4. The slotted valve type ceramic pump as described in claim 3, characterized in that, The bottom surface of the outer wall step (13) is provided with an alignment mounting position (131), and the upper surface of the extended jacket (51) is provided with a positioning structure (512).

5. The slotted valve type ceramic pump as described in claim 1, characterized in that, The ceramic sleeve (1) has a positioning plane (14) on its outer side wall, and the expansion sleeve (3) has a positioning hole (33) on its outer side wall. The positioning hole (33) is internally threaded with a positioning screw (34), and the positioning screw (34) abuts against the positioning plane (14).

6. The slotted valve type ceramic pump as described in claim 1, characterized in that, The ceramic sleeve (1) has a sealing plane (12) formed on the outer wall around the liquid channel hole (11).

7. The slotted valve type ceramic pump as described in claim 1, characterized in that, The grooved valve type metering rod (2) includes a fixed connection section (21), a clearance section (22), a guide section (23), a small step section (24), and a large step section (25) arranged sequentially from top to bottom. An annular groove (26) for installing an O-ring is provided on the outer wall of the fixed connection section (21). A positioning pin (27) is provided between the fixed connection section (21) and the clearance section (22). A multi-lobed guide structure (28) is provided on the outer wall of the guide section (23). A grooved valve (29) is provided on the outer wall of the small step section (24).

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