CN216077458U - Piston pump and piston pump system for conveying paste materials - Google Patents

Abstract

The utility model provides a piston pump and a piston pump system for conveying paste materials, wherein the piston pump comprises: the pressure applying pump body is provided with a pressure applying cavity, and the pressure applying cavity comprises a work sub-cavity and a material recycling sub-cavity which are communicated; the pressing piston is arranged in the working sub-cavity in a reciprocating sliding manner and divides the working sub-cavity into a pressing cavity section and an avoiding cavity section which are separated from each other, wherein a material suction port and a material discharge port which are communicated with the pressing cavity section are formed in the pressing pump body, and the material recovery sub-cavity is adjacent to and communicated with the avoiding cavity section; when the pressurizing piston slides towards one side of the material recovery sub-cavity, the pressurizing piston is used for pushing paste materials which permeate into the avoiding cavity section from the pressurizing cavity section into the material recovery sub-cavity. The utility model solves the problem that the piston pump in the prior art has poor functionality because the piston pump cannot continuously and stably convey the sulfur paste slurry due to unreasonable structure.

Description

Piston pump and piston pump system for conveying paste materials

Technical Field

The utility model relates to the technical field of chemical paste material conveying, in particular to a piston pump and a piston pump system for conveying paste materials.

Background

In the existing coking and chemical fertilizer industries, a wet-process gas desulfurization sulfur recovery process is generally applied, sulfur paste slurry is generated in the process after sulfur foam is filtered, the sulfur paste slurry is used as a viscous chemical dilute material, the flowing property of the slurry is poor, and when a traditional piston pump is adopted to convey the sulfur paste slurry in the existing coking and chemical fertilizer industries; on one hand, because the sulfur paste slurry also contains a large amount of gas existing in the form of bubbles, cavitation is easy to occur due to the aggregation of the bubbles when the sulfur paste slurry is conveyed by the piston pump, so that the conveying efficiency of the sulfur paste slurry by the piston pump is influenced; on the other hand, because the piston of the piston pump and the inner wall surface of the pump cavity cannot be absolutely sealed, moisture is separated out in the process of pressing the sulfur paste slurry, so that leakage is easy to occur, the environment is polluted, the piston pump is easy to wear, and the problem that the piston pump cannot continuously and stably convey the sulfur paste slurry, so that economic benefit is affected is also solved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a piston pump and a piston pump system for conveying paste materials, and aims to solve the problem that the piston pump in the prior art cannot continuously and stably convey sulfur paste slurry due to unreasonable structure and is poor in functionality.

In order to achieve the above object, according to one aspect of the present invention, there is provided a piston pump for transferring a paste material, comprising: the pressure applying pump body is provided with a pressure applying cavity, and the pressure applying cavity comprises a work sub-cavity and a material recycling sub-cavity which are communicated; the pressing piston is arranged in the working sub-cavity in a reciprocating sliding manner and divides the working sub-cavity into a pressing cavity section and an avoiding cavity section which are separated from each other, wherein a material suction port and a material discharge port which are communicated with the pressing cavity section are formed in the pressing pump body, and the material recovery sub-cavity is adjacent to and communicated with the avoiding cavity section; when the pressurizing piston slides towards one side of the material recovery sub-cavity, the pressurizing piston is used for pushing paste materials which permeate into the avoiding cavity section from the pressurizing cavity section into the material recovery sub-cavity.

Further, the material recycling sub-cavity and the working sub-cavity are adjacently arranged along the sliding direction of the pressure applying piston, and the cavity cross-sectional area of the material recycling sub-cavity is smaller than that of the working sub-cavity.

Furthermore, the pressure applying pump body is provided with a vent hole and a flushing port which are communicated with the material recovery sub-cavity, the vent hole is positioned at the bottom of the pressure applying pump body, and the flushing port is positioned at the top of the pressure applying pump body.

Further, the cavity cross section of the work sub-cavity is circular, the cavity wall surface of the material recovery sub-cavity is a smooth curved surface, the bottom of the cavity wall surface of the material recovery sub-cavity is provided with a lowest surface position point, and the evacuation port is arranged at the lowest surface position point.

Further, the cavity cross-sectional area of the material recovery sub-cavity gradually decreases in a direction away from the working sub-cavity.

Furthermore, the material suction inlet and the material discharge outlet are both arranged on an end cover of the pressure pump body opposite to the pressure piston, the material suction inlet is connected with a feed pipe, the material discharge outlet is connected with a discharge pipe, and the feed pipe and the discharge pipe are both provided with one-way valves.

Further, the piston pump further comprises: the driving pump body and the driving piston are arranged at intervals in the sliding direction of the pressing piston, the driving pump body is provided with a driving cavity, and the driving piston is arranged in the driving cavity in a reciprocating sliding manner; and the first end of the piston connecting rod is connected with the driving piston, and the second end of the piston connecting rod is connected with the pressure applying piston.

Furthermore, the piston pump is a pneumatic piston pump, a first air port and a second air port which are communicated with the driving cavity are formed in the driving pump body, and the first air port and the second air port are both positioned on one side, away from the pressure applying pump body, of the driving piston; a reset spring is also arranged in the driving cavity, is sleeved on the piston connecting rod and is abutted against the driving piston and the inner wall surface of the driving cavity; or the first air port and the second air port are respectively positioned at two sides of the driving piston, and the first air port and the second air port are both arranged on the side wall surface at the position close to the end cover of the driving pump body.

Further, the piston pump further comprises a seal assembly, the seal assembly comprising: the sealing box body is arranged between the pressure applying pump body and the driving pump body, is positioned on the outer peripheral side of the piston connecting rod and is connected with the pressure applying pump body; the sealing box comprises a sealing filler and a sealing box cover, wherein the sealing filler is arranged in the sealing box body, and the sealing box cover is detachably covered on the sealing box body and used for tightly pressing the sealing filler.

According to another aspect of the present invention, there is provided a piston pump system comprising: the protective cover can be covered on the bearing bracket in an opening and closing manner and forms an installation space with the bearing bracket; the two piston pumps are both the piston pumps, are arranged on the bearing bracket in parallel and are positioned in the installation space.

By applying the technical scheme of the utility model, through the structural optimization of the piston pump, the piston pump with a novel structure capable of stably and efficiently conveying paste materials is provided, particularly sulfur paste slurry generated in a sulfur recovery process in the coking and chemical fertilizer industries has excellent conveying performance, material leakage is avoided in the process of conveying the paste materials, the environment is ensured to be clean, the piston pump can continuously and stably operate for a long time, the automatic conveying performance of the paste materials is ensured, the conveying efficiency of the paste materials is greatly improved, the conveying cost of the paste materials is greatly reduced, and the economic benefit of the sulfur recovery process is improved.

Specifically, as shown in fig. 1, the piston pump provided by the utility model realizes the spatial zoning and grading layout of the pressure-applying cavity mainly by optimizing the structure of the pressure-applying pump body, and the pressure-applying cavity is divided into a working sub-cavity and a material recovery sub-cavity, wherein the working sub-cavity is further divided into a pressure-applying cavity section and an avoiding cavity section, so that, taking the view angle in fig. 1 as an example, when the pressure-applying piston slides in the working sub-cavity from left to right, paste material is sucked into the pressure-applying cavity section, when the pressure-applying piston slides in the working sub-cavity from right to left, the paste material is pushed out of the pressure-applying cavity section, the paste material is extruded and conveyed by one-time reciprocating sliding of the pressure-applying piston, and the pressure-applying piston continuously reciprocates, so that the piston pump continuously conveys the paste material. The structure of the pressurizing pump body of the piston pump is optimized and is characterized in that the pressurizing cavity is divided into the material recovery sub-cavity, because absolute sealing cannot be achieved between the peripheral wall surface of the pressurizing piston and the inner wall surface of the working sub-cavity, the pressurizing piston extrudes paste materials when sliding to extrude the paste materials from right to left in a reciprocating sliding mode, gas and water in the paste materials can be separated out and can carry slurry impurities, the paste materials can be easily leaked from the pressurizing cavity section to the avoiding cavity section through a gap between the peripheral wall surface of the pressurizing piston and the inner wall surface of the working sub-cavity, the material recovery sub-cavity provides a storage space for water and slurry impurities in the avoiding cavity section, when the pressurizing piston slides to suck the materials from left to right, the pressurizing piston can effectively push the water and slurry impurities remained in the avoiding cavity section to the material recovery sub-cavity, further, the long-term detention of gas, moisture and slag slurry impurities in the avoidance cavity section is avoided, cavitation, corrosion and abrasion of the piston pump are prevented, the service life of the piston pump is effectively prolonged, the continuous and stable conveying of sulfur paste slurry is ensured, and the economic benefit of the sulfur recovery process is greatly improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic front view of a piston pump for conveying paste materials according to an alternative embodiment of the utility model;

fig. 2 shows a schematic front view of a piston pump for delivering paste materials according to an alternative embodiment of the utility model;

FIG. 3 shows a schematic view of a piston pump system incorporating the piston pump of FIG. 1 or FIG. 2;

fig. 4 shows a schematic view of the piston pump system of fig. 3 with the protective cover removed.

Wherein the figures include the following reference numerals:

10. a pressure applying pump body; 11. a pressure application cavity; 111. a working chamber; 112. a material recovery sub-cavity; 113. a pressure applying cavity section; 114. Avoiding a cavity section; 12. a material suction inlet; 13. a material discharge port; 14. emptying the air; 15. flushing the opening; 16. an end cap; 17. A first gas port; 18. a second gas port; 20. a pressure applying piston; 30. a feed pipe; 40. a discharge pipe; 50. a one-way valve; 60. driving the pump body; 61. a drive chamber; 70. a drive piston; 80. a piston connecting rod; 90. a seal assembly; 91. sealing the box body; 92. Sealing and filling; 93. sealing the box cover; 100. a return spring; 1. a load bearing bracket; 101. supporting legs; 102. fixing the bent plate; 2. a protective cover; 201. avoiding the notch; 202. an operating handle; 3. a piston pump; 301. flushing the pipeline; 302. the line is evacuated.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the utility model herein. Furthermore, the terms "comprises," "comprising," "includes," "including," "has," "having," and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In order to solve the problem that a piston pump in the prior art cannot continuously and stably convey sulfur paste due to unreasonable structure, and has poor functionality, the utility model provides a piston pump and a piston pump system for conveying paste materials, as shown in fig. 3 and 4, the piston pump system comprises a bearing bracket 1, a protective cover 2 and piston pumps 3, the protective cover 2 is openably covered on the bearing bracket 1 and forms an installation space with the bearing bracket 1, the number of the piston pumps 3 is two, and the two piston pumps 3 are piston pumps which are described below, and are arranged on the bearing bracket 1 in parallel and are positioned in the installation space. The bearing bracket 1 is provided with a plurality of supporting legs 101 which are provided with a plurality of supporting legs which are beneficial to the installation of the piston pump 3 and the adjustment of the installation height, so that the practicability of the piston pump 3 is improved, as shown in figure 4, the piston pump 3 can be detachably installed on the bearing bracket 1 through a fixed bent plate 102, thus being convenient for the disassembly and maintenance of the piston pump 3 and being beneficial to the control of the overall assembly cost of the piston pump system; the arrangement of the protective cover 2 and the bearing bracket 1 form an installation space, so that the piston pump 3 is effectively protected, collision and damage in long-distance transportation are facilitated, the protective cover 2 can be connected with the bearing bracket 1 in a pivoting mode, and in fig. 3, the protective cover 2 is provided with an operating handle 202 which is convenient for field operators to open and close; the protective cover 2 is further provided with an avoiding gap 201 from which an irrigation pipeline 301 connected with the irrigation opening 15 of the piston pump 3 extends, so that the piston pump system is convenient to be connected with external instruments for assembly. Likewise, as shown in fig. 3 and 4, the evacuation line 302 for connection to the evacuation port of the piston pump 3 likewise protrudes out of the installation space. In addition, the two piston pumps 3 positioned in the installation space work alternately, namely the piston stroke directions of the two piston pumps 3 are just opposite, the piston pumps 3 suck and press under pressure, so that the feeding flow is relatively stable, the electromagnetic valve circuit is adopted to control the alternate pumping and feeding of the double cylinders, and the liquid pressure fluctuation is smaller.

The piston pump of the present invention is used for conveying pasty materials, preferably sulfur paste, but not limited to this, and viscous chemical slurries can be conveyed efficiently by using the piston pump provided by the present invention.

As shown in fig. 1, the piston pump comprises a pressure applying pump body 10 and a pressure applying piston 20, wherein the pressure applying pump body 10 is provided with a pressure applying cavity 11, and the pressure applying cavity 11 comprises a work sub-cavity 111 and a material recycling sub-cavity 112 which are communicated; the pressurizing piston 20 is arranged in the working sub-cavity 111 in a reciprocating sliding manner, and divides the working sub-cavity 111 into a pressurizing cavity section 113 and an avoiding cavity section 114 which are separated from each other, wherein the pressurizing pump body 10 is provided with a material suction port 12 and a material discharge port 13 which are communicated with the pressurizing cavity section 113, and the material recovery sub-cavity 112 is adjacent to and communicated with the avoiding cavity section 114; when the pressing piston 20 slides toward one side of the material recovery subchamber 112, the pressing piston 20 is used to push the paste material infiltrated into the avoidance cavity segment 114 from the pressing cavity segment 113 into the material recovery subchamber 112.

Through the structural optimization to the piston pump, the piston pump of a novel structure that can be stable, high-efficient transport to the lotion material is provided, especially to the sulphur cream thick liquids that produces in the sulphur technology is retrieved in the desulfurization of coking, chemical fertilizer industry, possess good transport performance, can not produce the material leakage in carrying the lotion material moreover, ensure that the environment is clean, the piston pump can be continuously and stably operated for a long time, ensured the performance to the automatic transport of lotion material, the lotion material has been promoted by a wide margin by conveying efficiency, thereby the cost of transportation of lotion material has been reduced widely, the economic benefits of sulphur technology is retrieved in the desulfurization has been promoted.

Specifically, as shown in fig. 1 and fig. 2, the piston pump provided by the present invention mainly optimizes the structure of the pressure applying pump body 10 to realize a spatial-division hierarchical layout of the pressure applying cavity 11, and divides the pressure applying cavity 11 into a working sub-cavity 111 and a material recycling sub-cavity 112, wherein the working sub-cavity 111 is further divided into a pressure applying cavity segment 113 and a avoiding cavity segment 114, so that, taking the view angle in fig. 1 as an example, when the pressure applying piston 20 slides in the working sub-cavity 111 from left to right, the paste material is sucked into the pressure applying cavity segment 113, when the pressure applying piston 20 slides in the working sub-cavity 111 from right to left, the paste material is pushed out of the pressure applying cavity segment 113, one-time reciprocating sliding of the pressure applying piston 20 realizes squeeze-type delivery of the paste material, and when the pressure applying piston 20 continuously reciprocates, the piston pump continuously delivers the paste material. The structure optimization of the pressing pump body 10 of the piston pump is mainly characterized in that the pressing cavity 11 is divided into the material recovery sub-cavity 112, because absolute sealing cannot be achieved between the peripheral wall surface of the pressing piston 20 and the inner wall surface of the working sub-cavity 111, the pressing piston 20 extrudes paste materials when sliding to and fro, particularly when sliding to and extrude the paste materials from right to left, gas and water in the paste materials can be separated out and can carry slag slurry impurities, and further the paste materials are easy to leak into the avoiding cavity section 114 from the pressing cavity section 113 through a gap between the peripheral wall surface of the pressing piston 20 and the inner wall surface of the working sub-cavity 111, the existence of the material recovery sub-cavity 112 provides a storage space for the water and the slag slurry impurities in the avoiding cavity section 114, when the pressing piston 20 slides to and sucks in the material from left to right, the pressing piston 20 can effectively push the water and the slag slurry impurities in the avoiding cavity 114 into the material recovery sub-cavity 112, further, the long-term retention of gas, moisture and slag slurry impurities in the avoidance cavity section 114 is avoided, cavitation, corrosion and abrasion of the piston pump are prevented, the service life of the piston pump is effectively prolonged, the continuous and stable delivery of sulfur paste slurry is ensured, and the economic benefit of the desulfurization sulfur recovery process is greatly improved.

As shown in fig. 1, the material recovery sub-chamber 112 is disposed adjacent to the working sub-chamber 111 in the sliding direction of the pressing piston 20, and the chamber cross-sectional area of the material recovery sub-chamber 112 is smaller than that of the working sub-chamber 111. In this way, the inner wall surface of the pressurizing pump body 10 at the position of the avoidance cavity segment 114 and the material recovery sub-cavity 112 is ensured to act as a stop for the pressurizing piston 20, so that the pressurizing piston 20 is prevented from excessively moving into the material recovery sub-cavity 112, and the working reliability of the piston pump is ensured.

As shown in fig. 3, the pressure applying pump body 10 is provided with a drain port 14 and a flushing port 15 which are communicated with the material recycling sub-cavity 112, the drain port 14 is located at the bottom of the pressure applying pump body 10, and the flushing port 15 is located at the top of the pressure applying pump body 10. The evacuation port 14 is used for connecting the evacuation line 302, and the flushing port 15 is used for connecting the flushing line 301. The arrangement of the emptying port 14 is beneficial to discharging water and slag slurry impurities accumulated in the material recovery sub-cavity 112, and the influence of excessive accumulation of the slag slurry impurities on the normal work of the piston pump is avoided; the arrangement of the flushing port 15 is beneficial to flushing the material recovery sub-cavity 112, so that the phenomenon that the emptying port 14 is blocked after the slag and slurry impurities are dried is avoided, and the working stability of the piston pump is ensured.

In this embodiment, the cavity cross section of the working sub-cavity 111 is circular, which is beneficial to the reciprocating sliding of the pressing piston 20, reduces the sliding friction force, improves the wall surface sealing effect, and is simultaneously convenient for manufacturing and beneficial to the control of the manufacturing and processing cost. The cavity wall of the material recovery sub-cavity 112 is a smooth curved surface, and the bottom of the cavity wall of the material recovery sub-cavity 112 has the lowest surface position, and the evacuation port 14 is provided at the lowest surface position. Thus, moisture and slurry impurities accumulated in the material recovery subchamber 112 can be discharged out of the material recovery subchamber 112 automatically under the gravity flow condition.

Optionally, the chamber cross-sectional area of the material recovery sub-chamber 112 decreases progressively in a direction away from the working sub-chamber 111. Like this, evacuation mouth 14 sets up at the end of the sub-chamber 111 of keeping away from work of material recovery sub-chamber 112, ensures that the sub-chamber 112 of material recovery can accomodate more moisture content and sediment thick liquid impurity, promotes the holding performance, ensures the long-time stable work of piston pump.

As shown in fig. 1, in order to facilitate that more paste material is sucked into the pressing cavity section 113 during one complete stroke of the pressing piston 20 and more paste material is discharged out of the pressing cavity section 113, the working performance of the piston pump is improved. The material suction inlet 12 and the material discharge outlet 13 are both arranged on the end cover 16 of the pressure pump body 10 opposite to the pressure piston 20, the material suction inlet 12 is connected with the feeding pipe 30, the material discharge outlet 13 is connected with the discharge pipe 40, and the feeding pipe 30 and the discharge pipe 40 are both provided with one-way valves 50. The one-way valve 50 can stably plan the path of the paste material entering and discharging from the pressure application cavity section 113, and ensure that the piston pump stably conveys the paste material.

Optionally, the diameter of the discharging pipe 40 is smaller than or equal to the diameter of the feeding pipe 30, so that the paste material is sucked, the conveying pressure of the discharging pipe 40 is improved, and the conveying performance of the paste material is improved. Preferably, the pipe diameter of the discharging pipe 40 is DN50, and the pipe diameter of the feeding pipe 30 is DN 80.

As shown in fig. 1, in order to ensure the functional integrity of the piston pump, the piston pump further includes a driving cylinder 60, a piston rod 80 and a driving piston 70, the driving cylinder 60 is disposed spaced apart from the pressing cylinder 10 in the sliding direction of the pressing piston 20, the driving cylinder 60 has a driving chamber 61, and the driving piston 70 is disposed in the driving chamber 61 in a reciprocating sliding manner; a first end of the piston connecting rod 80 is connected to the driving piston 70, and a second end of the piston connecting rod 80 is connected to the pressurizing piston 20. Thus, the pump body 60 is driven to reciprocate the pressurizing piston 20 by the piston rod 80, so that the piston pump operates stably.

In the alternative embodiment shown in fig. 1 of the present invention, the piston pump is a pneumatic piston pump, the driving pump body 60 is provided with a first air port 17 and a second air port 18 which are communicated with the driving cavity 61, the first air port 17 and the second air port 18 are respectively located at two sides of the driving piston 70, and the first air port 17 and the second air port 18 are both opened on the side wall surface at the position close to the end cover of the driving pump body 60. Thus, as a power source, when the propelling force and the restoring force are provided for the driving piston 70, the gas pressure is input, and the provided propelling force and the restoring force can be adjusted steplessly within a preset range, so that the paste materials can be conveyed more easily when the conveying medium is the paste materials.

In the alternative embodiment of the present invention shown in fig. 2, the piston pump is a pneumatic piston pump, the driving pump body 60 is provided with a first air port 17 and a second air port 18 which are communicated with the driving cavity 61, and the first air port 17 and the second air port 18 are located on one side of the driving piston 70 which is far away from the pressurizing pump body 10; the drive chamber 61 is further provided with a return spring 100, and the return spring 100 is sleeved on the piston connecting rod 80 and is abutted against the inner wall surfaces of the drive piston 70 and the drive chamber 61. Thus, the power stability is ensured, and the cost is controllable. Alternatively, the return spring 100 is a compression spring. A restoring force is provided for the driving piston 70 to move toward the side facing away from the pressurizing cylinder 10. Preferably, the first air port 17 is opened in the end cap of the drive cylinder 60 opposite to the pressurizing cylinder 10, and the second air port 18 is opened in the side wall of the drive cylinder 60, so that the pneumatic drive of the drive piston 70 is facilitated.

As shown in fig. 1, the piston pump further includes a seal assembly 90, the seal assembly 90 includes a seal box body 91, a seal packing 92 and a seal box cover 93, the seal box body 91 is disposed between the pressure pump body 10 and the driving pump body 60, and the seal box body 91 is located on the outer circumferential side of the piston rod 80 and is connected to the pressure pump body 10; the sealing packing 92 is disposed in the sealing box 91, and the sealing box cover 93 is detachably covered on the sealing box 91 for compressing the sealing packing 92. Therefore, the leakage of moisture and slag slurry impurities accumulated in the material recycling sub-cavity 112 is effectively prevented from polluting the environment, the sealing filler 92 is convenient to replace, and the overall sealing performance of the piston pump is further ensured.

The two piston pumps 3 of the piston pump system realize double cylinders and double pistons, and ensure that paste materials are conveyed relatively stably. Meanwhile, the large-diameter material suction inlet 12 is adopted, so that the paste material cannot be effectively sucked into the pressure application cavity section 113. The two piston pumps 3 respectively adopt the electromagnetic valve circuit to control the alternate material pumping and feeding of the double cylinders, so that the steering service life of the pumps is longer. And a compression spring is added in the one-way valve, so that the discharging is smoother, and the efficiency of the piston pump is improved.

The application can solve the conveying problem of sulfur foam and sulfur paste in the coking and chemical fertilizer industries.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The integrated unit in the above embodiments, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in the above computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing one or more computer devices (which may be personal computers, servers, network devices, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A piston pump for delivering a paste material, comprising:

the device comprises a pressure applying pump body (10), wherein the pressure applying pump body (10) is provided with a pressure applying cavity (11), and the pressure applying cavity (11) comprises a work sub-cavity (111) and a material recovery sub-cavity (112) which are communicated;

the pressurizing piston (20) is arranged in the working sub-cavity (111) in a reciprocating sliding manner, and divides the working sub-cavity (111) into a pressurizing cavity section (113) and an avoiding cavity section (114) which are separated from each other, wherein a material suction port (12) and a material discharge port (13) communicated with the pressurizing cavity section (113) are formed in the pressurizing pump body (10), and the material recovery sub-cavity (112) is adjacent to and communicated with the avoiding cavity section (114);

when the pressing piston (20) slides towards one side of the material recovery sub-cavity (112), the pressing piston (20) is used for pushing paste material infiltrated into the avoidance cavity body segment (114) from the pressing cavity body segment (113) into the material recovery sub-cavity (112).

2. A piston pump according to claim 1, characterized in that the material recovery sub-chamber (112) is arranged adjacent to the working sub-chamber (111) in the sliding direction of the pressing piston (20), and the cross-sectional chamber area of the material recovery sub-chamber (112) is smaller than the cross-sectional chamber area of the working sub-chamber (111).

3. The piston pump according to claim 2, wherein the pressure applying pump body (10) is provided with a drain opening (14) and a flushing opening (15) which are communicated with the material recovery sub-cavity (112), the drain opening (14) is located at the bottom of the pressure applying pump body (10), and the flushing opening (15) is located at the top of the pressure applying pump body (10).

4. The piston pump according to claim 3, characterized in that the cavity cross section of the working sub-cavity (111) is circular, the cavity wall surface of the material recovery sub-cavity (112) is a smooth curved surface, the bottom of the cavity wall surface of the material recovery sub-cavity (112) has a lowest surface point, and the evacuation port (14) is arranged at the lowest surface point.

5. A piston pump according to any of claims 1 to 4, wherein the chamber cross-sectional area of the material recovery sub-chamber (112) decreases progressively in a direction away from the working sub-chamber (111).

6. The piston pump according to claim 1, characterized in that the material intake opening (12) and the material discharge opening (13) are both provided on an end cap (16) of the pressure pump body (10) opposite the pressure piston (20), the material intake opening (12) is connected with a feed pipe (30), the material discharge opening (13) is connected with a discharge pipe (40), and the feed pipe (30) and the discharge pipe (40) are both provided with a one-way valve (50).

7. The piston pump as in claim 1, further comprising:

a driving pump body (60) and a driving piston (70), wherein the driving pump body (60) is arranged at a distance from the pressing pump body (10) in the sliding direction of the pressing piston (20), the driving pump body (60) is provided with a driving cavity (61), and the driving piston (70) is arranged in the driving cavity (61) in a reciprocating sliding manner;

a piston connecting rod (80), a first end of the piston connecting rod (80) is connected with the driving piston (70), and a second end of the piston connecting rod (80) is connected with the pressing piston (20).

8. The piston pump according to claim 7, characterized in that the piston pump is a pneumatic piston pump, the drive pump body (60) is provided with a first air port (17) and a second air port (18) which are communicated with the drive cavity (61),

the first and second gas ports (17, 18) are located on the side of the drive piston (70) facing away from the pressure cylinder (10); a return spring (100) is further arranged in the driving cavity (61), and the return spring (100) is sleeved on the piston connecting rod (80) and is abutted against the inner wall surfaces of the driving piston (70) and the driving cavity (61); or

The first air port (17) and the second air port (18) are respectively located on two sides of the driving piston (70), and the first air port (17) and the second air port (18) are both arranged on the side wall surface close to the end cover position of the driving pump body (60).

9. The piston pump as recited in claim 8, further comprising a seal assembly (90), the seal assembly (90) comprising:

a seal case (91), the seal case (91) being provided between the pressure pump body (10) and the drive pump body (60), the seal case (91) being located on the outer peripheral side of the piston connecting rod (80) and connected to the pressure pump body (10);

the sealing packing box comprises a sealing packing (92) and a sealing box cover (93), wherein the sealing packing (92) is arranged in the sealing box body (91), and the sealing box cover (93) is detachably covered on the sealing box body (91) and used for pressing the sealing packing (92).

10. A piston pump system, comprising:

the protective cover (2) is covered on the bearing bracket (1) in an openable manner and encloses an installation space with the bearing bracket (1);

-a piston pump (3), the number of piston pumps (3) being two, both according to any of claims 1 to 9, the two piston pumps (3) being arranged side by side on the carrier bracket (1) and being located in the installation space.

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