A plunger disc pump

Abstract

The utility model belongs to the technical field of glue supply structure, disclose a plunger pressure disc pump, plunger pressure disc pump includes: pump body, is equipped with main cavity in it, is equipped with valve body structure in main cavity, along vertical direction and is equipped with piston rod in main cavity and valve body structure, and valve body structure selectively opens along with the reciprocating motion of piston rod, glue outlet drive part is used for driving piston rod reciprocating motion along vertical direction, valve body structure is installed with sealing assembly, is used for sealing the clearance between valve body structure and main cavity inner wall or piston rod, sealing assembly includes elastic packing ring and pressure ring, elastic packing ring is equipped with the pressure groove of extension along the circumference, elastic packing ring can be radially elastically deformed and has the tendency of keeping pressure groove expansion, the inner wall of pressure groove can be extended into pressure groove and extruded to keep pressure groove in the expansion state. The plunger pressure disc pump provided by the utility model can improve the stability and reliability of valve body structure sealing, thereby guaranteeing the stability of glue outlet flow and glue outlet pressure.

Description

Technical Field

[0001] This utility model relates to the field of adhesive supply structure technology, and in particular to a plunger pressure plate pump. Background Technology

[0002] The plunger pressure plate pump is a key adhesive dispensing device in adhesive coating equipment. It uses a cylinder to drive the plunger rod and piston to reciprocate within the pump body, causing the internal valve ports of the plunger pump to open and close alternately to control the flow of adhesive and gradually increase the adhesive volume to achieve high-pressure delivery.

[0003] Currently, piston pump pistons mostly use conventional sealing rings for sealing. However, under high pressure conditions, the inner cavity or sealing rings are prone to wear, leading to sealing failure and internal leakage of adhesive, which in turn significantly reduces the adhesive flow rate and pressure stability.

[0004] Therefore, there is an urgent need for a plunger pressure plate pump to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a plunger pressure plate pump that can maintain the contact between the elastic sealing ring and the sealing surfaces on the inner and outer sides through multiple means, compensate for mechanical wear, greatly improve the stability and reliability of the seal, and ensure the stability of the dispensing flow rate and dispensing pressure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A plunger pressure plate pump is provided, comprising:

[0008] The pump body has a main cavity inside, and a valve body structure is provided inside the main cavity;

[0009] A piston rod is vertically inserted into the main cavity and the valve body structure, and the valve body structure is selectively opened as the piston rod reciprocates.

[0010] The dispensing drive unit has its output end connected to the piston rod, which is used to drive the piston rod to reciprocate in the vertical direction;

[0011] A sealing assembly is installed on the valve body structure to seal the gap between the valve body structure and the inner wall of the main cavity or the piston rod. The sealing assembly includes an elastic sealing ring and a pressure ring. The elastic sealing ring has a pressure groove extending circumferentially. The elastic sealing ring can elastically deform radially and has a tendency to keep the pressure groove expanding. The pressure ring is located at the opening of the pressure groove. The pressure ring can extend into the pressure groove and squeeze the inner wall of the pressure groove to keep the pressure groove in an expanded state.

[0012] As an optional technical solution, the pressure ring includes a platform portion and a pressing portion, wherein the pressing portion extends into the pressure groove and simultaneously squeezes the inner walls of the inner and outer sides of the pressure groove.

[0013] As an optional technical solution, the top end of the pressure ring is higher than the elastic sealing ring. Along the axial direction, the valve body structure abuts against the top end of the pressure ring, and the end of the elastic sealing ring with the groove is spaced apart from both the valve body structure and the top end of the pressure ring.

[0014] As an optional technical solution, the elastic sealing ring is embedded with an elastic structural member, which has the tendency to drive the pressure groove to expand.

[0015] As an optional technical solution, the elastic sealing ring is provided with sealing lips on both the inner and outer sides of the groove end near the groove opening. The sealing lips protrude radially from the body of the elastic sealing ring, and the sidewall of the sealing lip is provided with a plurality of scraping protrusions spaced apart along its axial direction.

[0016] The inner scraper ring is used to abut against the valve body structure, and the outer scraper ring is used to abut against the inner wall of the main cavity; or,

[0017] The inner scraper ring is used to abut against the piston rod, and the outer scraper ring is used to abut against the valve body structure.

[0018] As an optional technical solution, the valve body structure includes a first valve body and a second valve body, and the piston rod passes through the first valve body and the second valve body sequentially from top to bottom; when the piston rod moves downward, the first valve body opens and the second valve body closes; when the piston rod moves upward, the first valve body closes and the second valve body opens.

[0019] As an optional technical solution, the adhesive flow channel of the first valve body is located between the first valve body and the piston rod, and the sealing assembly installed on the first valve body seals the gap between the inner wall of the first valve body and the main cavity. The first valve body is equipped with two symmetrically arranged sealing assemblies, and the grooves of the two pressure grooves are arranged in opposite directions.

[0020] The adhesive flow channel of the second valve body is located between the inner wall of the second valve body and the main cavity, and the sealing assembly installed on the second valve body seals the gap between the second valve body and the piston rod.

[0021] As an optional technical solution, the piston rod is provided with a first step portion protruding from its outer peripheral wall. When the peripheral edge of the lower opening of the first valve body abuts against the first step portion, the adhesive flow channel of the first valve body is closed.

[0022] The main cavity is provided with a second step protruding from its inner wall. When the lower end of the second valve body abuts against the second step, the adhesive flow channel of the second valve body is closed.

[0023] As an optional technical solution, the upper opening of the pump body is provided with a sealing seat and an oil cup. The oil cup is installed on the top of the sealing seat, and the piston rod passes through the oil cup and the sealing seat in sequence. The piston rod is sealed to the sealing seat, and the oil cup is filled with lubricating oil.

[0024] As an optional technical solution, the upper end of the main cavity forms a glue outlet cavity, the glue outlet cavity is provided with a glue outlet, and a vent is installed on the side of the glue outlet, the vent can selectively connect the glue outlet cavity with the external atmosphere.

[0025] As an optional technical solution, it also includes a base, a lifting drive mechanism, and a lifting platform. The lifting drive mechanism is installed on the base, and the pump body and the dispensing drive component are both installed on the lifting platform. The lifting drive mechanism includes a lifting shaft that can extend and retract in the vertical direction, and the upper end of the lifting shaft is connected to the lifting platform.

[0026] The lifting drive mechanism is fitted with a metal guide sleeve, and the lifting shaft is movably inserted through the metal guide sleeve. The inner wall of the metal guide sleeve abuts against the outer peripheral wall of the lifting shaft to limit the linear extension and retraction direction of the lifting shaft.

[0027] The beneficial effects of this utility model are:

[0028] The plunger pressure plate pump provided by this utility model seals the gap between the valve body structure and the piston rod or the inner wall of the main cavity through a sealing assembly. The sealing assembly includes an elastic sealing ring and a pressure ring. The elastic sealing ring has a pressure groove. On the one hand, the adhesive flowing into the pressure groove fills the groove, driving it to expand. On the other hand, the elastic sealing ring can also maintain the expanded state of the pressure groove by its own elasticity. The two work together to make the inner and outer sides of the elastic sealing ring expand apart to abut against the sealing surface and improve the sealing effect. When the sealing surface or the elastic sealing ring wears, the elastic sealing ring increases its expansion degree under its own elastic drive to compensate for the wear. In addition, a pressure ring is set at the groove opening. The pressure ring extends into the groove to squeeze the inner wall of the groove, pushing the groove to expand outward. Through multiple means, the elastic sealing ring is kept in contact with the sealing surfaces on the inner and outer sides, compensating for mechanical wear, and greatly improving the stability and reliability of the seal, thereby ensuring the stability of the adhesive flow rate and adhesive pressure. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the plunger pressure plate pump provided by this utility model;

[0030] Figure 2 This is a partial structural cross-section of the plunger pressure plate pump provided by this utility model. Figure 1 ;

[0031] Figure 3 This is a partial structural cross-section of the plunger pressure plate pump provided by this utility model. Figure 2 ;

[0032] Figure 4 yes Figure 3 A magnified structural diagram of region A in the middle;

[0033] Figure 5 yes Figure 3 A magnified structural diagram of region B in the middle;

[0034] Figure 6 This is a schematic diagram of the structure of the elastic sealing ring and the pressure ring provided by this utility model;

[0035] Figure 7 This is a schematic diagram of the cross-sectional structure of the elastic sealing ring provided by this utility model;

[0036] Figure 8 This is a partial structural cross-section of the plunger pressure plate pump provided by this utility model. Figure 3 .

[0037] In the picture:

[0038] 1. Pump body; 101. Glue outlet; 102. Second step section; 10. Main cavity; 20. Glue outlet cavity;

[0039] 2. Piston rod; 201. First step section;

[0040] 3. Valve body structure; 31. First valve body; 311. Connecting shaft seat; 312. Piston guide sleeve; 32. Second valve body; 321. Valve seat; 322. Valve cylinder;

[0041] 4. Elastic sealing ring; 41. Pressure groove; 42. Sealing lip; 43. Scraper ring;

[0042] 5. Pressure ring; 51. Platform section; 52. Press-in section;

[0043] 6. Spacer ring;

[0044] 71. Sealing seat; 72. Oil cup; 73. Lifting guide sleeve; 74. Cover plate; 75. First sealing ring; 76. Second sealing ring;

[0045] 8. Dispensing drive component; 81. Protective cover;

[0046] 9. Lifting drive mechanism; 91. Lifting shaft; 92. Metal guide sleeve;

[0047] 11. Base; 12. Air vent; 13. Pressure plate cover; 14. Lifting platform; 15. Hoisting rod; 16. Traveling wheels; 17. Control host. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0052] Example 1:

[0053] Please refer to Figures 1-8This embodiment provides a plunger pressure plate pump, which includes a pump body 1, a piston rod 2, a dispensing drive 8, a base 11, and a lifting platform 14. The base 11 has a workstation for placing a glue bucket. The lifting platform 14 is vertically adjustable on the base 11 to adjust the height of the pressure plate. The dispensing drive 8 is mounted on the lifting platform 14, and its output end is connected to the piston rod 2. The pump body 1 is suspended below the lifting platform 14 by multiple lifting rods 15. The pump body 1 has a main cavity 10, and a valve body structure 3 is located within the main cavity 10. The piston rod 2 passes vertically through the main cavity 10 and the valve body structure 3. The valve body structure 3 selectively opens with the reciprocating motion of the piston rod 2. A pressure plate cover 13 that can extend into the glue bucket is installed at the lower end of the pump body 1. During operation, the pressure plate cover 13 presses against the upper surface of the adhesive liquid in the glue bucket, and the lower end opening of the main cavity 10 extends into the adhesive liquid. The glue dispensing drive 8 drives the piston rod 2 to reciprocate vertically in the main cavity 10 of the pump body 1 to pump the adhesive liquid upward, so that the adhesive liquid is sent out from the glue dispensing port 101 located at the upper end of the main cavity 10.

[0054] For further details, please refer to Figures 1-8 A sealing assembly is installed on the valve body structure 3. The sealing assembly is used to seal the gap between the valve body structure 3 and the inner wall of the main cavity 10 or the piston rod 2. The sealing assembly includes an elastic sealing ring 4 and a pressure ring 5. The elastic sealing ring 4 is provided with a pressure groove 41 extending in the circumferential direction. The elastic sealing ring 4 can be elastically deformed in the radial direction and has the tendency to keep the pressure groove 41 expanding. The pressure ring 5 is provided at the opening of the pressure groove 41. The pressure ring 5 can extend into the pressure groove 41 and squeeze the inner wall of the pressure groove 41 to keep the pressure groove 41 in an expanded state.

[0055] Specifically, the plunger pressure plate pump provided in this embodiment seals the gap between the valve body structure 3 and the piston rod 2 or the inner wall of the main cavity 10 through a sealing assembly. The sealing assembly includes an elastic sealing ring 4 and a pressure ring 5. The elastic sealing ring 4 has a pressure groove 41. On the one hand, the adhesive flowing into the pressure groove 41 fills the pressure groove 41 and drives the pressure groove 41 to expand. On the other hand, the elastic sealing ring 4 can also rely on its own elasticity to maintain the expansion state of the pressure groove 41. The two work together to make the inner and outer sides of the elastic sealing ring 4 expand apart to abut against the sealing surface and improve the sealing effect. When the sealing surface or the elastic sealing ring 4 is worn, the elastic sealing ring 4 increases the degree of expansion under its own elastic drive to compensate for the wear. In addition, a pressure ring 5 is set at the opening of the pressure groove 41. The pressure ring 5 extends into the pressure groove 41 to squeeze the inner wall of the pressure groove 41 and push the pressure groove 41 to expand outward. Through multiple means, the elastic sealing ring 4 is kept in contact with the sealing surfaces on the inner and outer sides, and mechanical wear is compensated, which greatly improves the stability and reliability of the seal, thereby ensuring the stability of the dispensing flow rate and dispensing pressure.

[0056] For example, please refer to Figures 2-5The valve body structure 3 includes a first valve body 31 and a second valve body 32. The piston rod 2 passes through the first valve body 31 and the second valve body 32 sequentially from top to bottom. When the piston rod 2 moves downward, the first valve body 31 opens and the second valve body 32 closes; when the piston rod 2 moves upward, the first valve body 31 closes and the second valve body 32 opens. The dispensing drive 8 drives the piston rod 2 to reciprocate, causing the first valve body 31 and the second valve body 32 to open alternately, thereby pumping the adhesive upward.

[0057] For example, please refer to Figure 2 and Figure 4 The adhesive flow channel of the first valve body 31 is located between the first valve body 31 and the piston rod 2. The piston rod 2 is provided with a first step portion 201 protruding from its outer peripheral wall. When the peripheral edge of the lower opening of the first valve body 31 abuts against the first step portion 201, the adhesive flow channel of the first valve body 31 is closed. The sealing assembly installed on the first valve body 31 seals the gap between the first valve body 31 and the inner wall of the main cavity 10. Specifically, an annular sealing groove is formed on the outer periphery of the first valve body 31. A first sealing assembly for sealing the outer peripheral wall of the first valve body 31 and the inner wall of the main cavity 10 is installed in the sealing groove. The first valve body 31 is configured as a split structure, including a connecting shaft seat 311 and a piston guide sleeve 312. Both the connecting shaft seat 311 and the piston guide sleeve 312 are fitted onto the piston rod 2. The connecting shaft seat 311 can move relative to the piston rod 2 along the axial direction within a certain range. The piston guide sleeve 312 is partially embedded in the connecting shaft seat 311, and the two are fixed to each other. Both the connecting shaft seat 311 and the piston guide sleeve 312 are provided with flanges. The sealing groove is formed on the outer periphery of the piston guide sleeve 312 and located between the two flanges. When the connecting shaft seat 311 and the piston guide sleeve 312 are separated, the sealing groove opens, and the sealing assembly can be installed or removed.

[0058] Furthermore, the first valve body 31 is equipped with two symmetrically arranged sealing components. Both sealing components are fitted into the sealing groove. The grooves of the two pressure grooves 41 are arranged in opposite directions. The pressure rings 5 ​​of the two sealing components are located on opposite sides of the two elastic sealing rings 4 to achieve reliable bidirectional sealing.

[0059] For example, please refer to Figure 2 and Figure 5The adhesive flow channel of the second valve body 32 is located between the second valve body 32 and the inner wall of the main cavity 10. The inner circumference of the second valve body 32 is movably sealed with the outer circumference of the piston rod 2. The main cavity 10 has a second step portion 102 protruding from its inner wall. When the lower end of the second valve body 32 abuts against the second step portion 102, the adhesive flow channel of the second valve body 32 is closed. Specifically, the second valve body 32 is configured as a split structure, including a valve seat 321 and a valve cylinder 322, both of which are cylindrical. The valve seat 321 and the valve cylinder 322 are both fitted onto the piston rod 2 and are interlocked and fixed to each other. The inner holes of the valve seat 321 and the valve cylinder 322 are both provided with flanges, and a receiving space for the sealing assembly is formed between the two flanges. When the valve seat 321 and the valve cylinder 322 are separated, the receiving space is opened to facilitate the installation or removal of the sealing assembly.

[0060] For further details, please refer to Figure 5 The accommodating space contains two symmetrically arranged elastic sealing rings 4. The grooves 41 of the two elastic sealing rings 4 are oriented in opposite directions, and a spacer ring 6 is provided between the two elastic sealing rings 4. In this embodiment, only the elastic sealing ring 4 with the groove 41 facing downwards is provided with a second pressure ring 5.

[0061] To improve sealing performance and remove adhesive residue from the main cavity 10 or piston rod 2, please refer to... Figure 6 and Figure 7 The elastic sealing ring 4 has sealing lips 42 on both the inner and outer sides of the groove end near the pressure groove 41. The sealing lips 42 protrude radially from the body of the elastic sealing ring 4. The side wall of the sealing lip 42 has multiple scraping protrusions 43 spaced apart along its axis. One scraping protrusion 43 is used to abut against the valve body structure 3, and the other scraping protrusion 43 is used to abut against the inner wall of the main cavity 10 or the piston rod 2. For example, in the first valve body 31, the scraping protrusion 43 located on the inner side abuts against the peripheral wall of the piston guide sleeve 312, and the scraping protrusion 43 located on the outer side abuts against the inner wall of the main cavity 10; in the second valve body 32, the scraping protrusion 43 located on the inner side abuts against the peripheral wall of the piston rod 2, and the scraping protrusion 43 located on the outer side abuts against the inner wall of the valve cylinder 322. The design of the multi-layer scraping ring 43 allows the elastic sealing ring 4 to reliably scrape off the adhesive adhering to the main cavity 10 or piston rod 2 when it moves relative to the pump body 1 or piston rod 2, thus improving both the sealing effect and the scraping effect.

[0062] The elastic sealing ring 4 has an embedded elastic structural component that tends to drive the expansion of the pressure groove 41. Specifically, the elastic sealing ring 4 is a type of plug seal, a high-performance seal with a U-shaped Teflon core containing a special spring. The appropriate spring force combined with the fluid pressure of the adhesive pushes the sealing lip 42 out and presses it against the sealed metal surface to achieve an excellent sealing effect. The spring force can compensate for the wear of the sealing lip 42 and the adhesive scraping ring 43.

[0063] For the specific structure of the pressure ring 5, please refer to [reference needed]. Figure 6 The ring 5 has a platform portion 51 and a pressing portion 52, both of which are annular structures. One end of the pressing portion 52 is connected to the platform portion 51, and the other end of the pressing portion 52 extends into the pressing groove 41 and squeezes the inner wall of the pressing groove 41 to maintain the pressing groove 41 in an expanded state, thereby further improving the sealing effect of the elastic sealing ring 4. Since the side of the platform portion 51 away from the pressing portion 52 bears the fluid pressure of the adhesive, the pressing ring 5 has a tendency to move toward the pressing groove 41 to keep the pressing portion 52 inserted into the pressing groove 41.

[0064] Furthermore, the cross-section of the end of the pressing part 52 away from the platform part 51 is set as a triangular structure with rounded corners at the end, so that the pressing part 52 can be inserted into the pressing groove 41 and avoid scratching the elastic sealing ring 4.

[0065] For example, please refer to Figure 1 and Figure 8 The upper end of the main cavity 10 forms a glue outlet cavity 20, and the glue outlet 101 is connected to the glue outlet cavity 20. A vent nozzle 12 is also installed outside the glue outlet cavity 20, located beside the glue outlet 101. The vent nozzle 12 can selectively connect the glue outlet cavity 20 to the outside atmosphere. Specifically, after replacing the glue tank and starting to pump glue, the vent nozzle 12 is opened to release the gas in the main cavity 10 and the glue tank. After the glue is poured into or fills the glue outlet cavity 20, the vent nozzle 12 is closed to reduce the amount of gas mixed into the glue and ensure the glue quality of the front end.

[0066] For example, please refer to Figure 8 The pump body 1 has a sealing seat 71 and an oil cup 72 at its upper opening. The oil cup 72 is installed on top of the sealing seat 71. The piston rod 2 passes through the oil cup 72 and the sealing seat 71 in sequence. The sealing seat 71 is sealed to the upper opening of the pump body 1 by a sealing ring, and the piston rod 2 is sealed to the sealing seat 71. The oil cup 72 is filled with lubricating oil. Specifically, the sealing seat 71 and the piston rod 2 are sealed together by two first sealing rings 75 and two second sealing rings 76 to achieve multi-layer dynamic sealing. The two first sealing rings 75 are located on top of the two second sealing rings 76. The first sealing rings 75 are O-rings, and the second sealing rings 76 are plug seals with the groove facing downwards. A lifting guide sleeve 73 is provided between the topmost first sealing ring 75 and the oil cup 72. A gap is provided between the inner hole of the oil cup 72 and the piston rod 2 to allow the sol lubricating oil to pass through. The sol lubricating oil can flow downward to the two first sealing rings 75 and the two second sealing rings 76 through the gap to provide a liquid seal and maintain the lubrication state of the first sealing rings 75 and the second sealing rings 76.

[0067] Preferably, the lubricating oil is a sol-gel lubricating oil, such as silicone lubricating oil or fluorinated lubricating oil, which can dissolve the overflowing adhesive, prevent the adhesive from crystallizing, and ensure the accuracy of the reciprocating motion of the piston rod 2.

[0068] For example, please continue to refer to Figure 8 The oil cup 72 has an opening structure at the top, and the opening structure has an openable cover plate 74, which allows the staff to add solvent lubricating oil.

[0069] For example, the oil cup 72 is made of transparent acrylic material, allowing staff to observe the remaining amount of sol lubricant from the outside.

[0070] For example, please refer to Figure 1 and Figure 2 The dispensing drive 8 is mounted on the top surface of the lifting platform 14, and its output end extends downward through the lifting platform 14 to connect to the piston rod 2. In this embodiment, the dispensing drive 8 is a linear cylinder. In some embodiments, the dispensing drive 8 may also be a linear drive such as an electric push rod.

[0071] For example, please refer to Figure 1 and Figure 2 The lifting platform 14 is equipped with a protective cover 81, which covers the main body of the glue dispensing drive component 8, thus providing protection and improving safety.

[0072] To drive the lifting platform 14 to move vertically, please refer to... Figure 1 and Figure 2 A lifting drive mechanism 9 is mounted on the base 11. The lifting drive mechanism 9 includes a lifting shaft 91 that can extend and retract in the vertical direction, and the upper end of the lifting shaft 91 is connected to the lifting platform 14. Specifically, two lifting drive mechanisms 9 are arranged side by side at intervals, and the lifting shafts 91 of the two lifting drive mechanisms 9 are respectively connected to the left and right ends of the lifting platform 14 to drive the lifting platform 14 to rise and fall smoothly. In this embodiment, the lifting drive mechanism 9 is a cylinder. In some embodiments, the lifting drive mechanism 9 can also be a linear drive component such as a hydraulic cylinder.

[0073] To improve the smoothness and accuracy of the lifting platform 14, the deviation angle between the extension / retraction direction of the lifting shaft 91 and the vertical direction is reduced. Please refer to... Figure 2 In this embodiment, the lifting drive mechanism 9 is embedded with a metal guide sleeve 92. The lifting shaft 91 movably passes through the metal guide sleeve 92, and the inner wall of the metal guide sleeve 92 abuts against the outer peripheral wall of the lifting shaft 91 to limit the linear extension and retraction direction of the lifting shaft 91. The metal guide sleeve 92 is made of metal materials such as copper and steel, and has good rigidity. In this embodiment, the metal guide sleeve 92 is made of brass.

[0074] For example, please refer to Figure 1 and Figure 2 The plunger pressure plate pump also includes a control host 17, which is connected to the dispensing drive 8 and the lifting drive mechanism 9 by signal. The control host 17 is installed on the body of one of the lifting drive mechanisms 9. The control host 17 has a display screen and control buttons for staff to interact with information.

[0075] For example, a plurality of wheels 16, including omnidirectional wheels and directional wheels, are mounted under the base 11 to move the plunger pressure plate pump.

[0076] Example 2:

[0077] This embodiment provides another plunger pressure plate pump based on Embodiment 1, the difference of which is:

[0078] The top of the pressure ring 5 is located outside the pressure groove 41, and its height is higher than that of the elastic sealing ring 4. Along the axial direction, the valve body structure 3 abuts against the top of the pressure ring 5. The end of the elastic sealing ring 4 with the groove is spaced apart from both the top of the valve body structure 3 and the top of the pressure ring 5. Specifically, the platform portion 51 is spaced above the sealing lip 42 of the elastic sealing ring 4. Taking the sealing assembly at the first valve body 31 as an example, please refer to... Figure 4 When the connecting shaft seat 311 and the piston guide sleeve 312 are pressed against each other, the compressive force is transmitted to the platform portion 51 of the pressure ring 5. The sealing lip 42 of the elastic sealing ring 4 is not subjected to compressive force in the axial direction, thus not hindering the radial expansion of the elastic sealing ring 4. This allows the elastic sealing ring 4 to always remain in a freely expandable state, significantly improving the sealing reliability between the first valve body 31 and the inner wall of the main cavity 10. Similarly, please refer to... Figure 5 At the second valve body 32, when the valve seat 321 and the valve cylinder 322 are pressed against each other, the elastic sealing ring 4 located below is protected by the platform part 51 of the pressure ring 5, which can also avoid the influence of the extrusion force, thereby maintaining a freely expandable state at all times, greatly improving the sealing reliability between the second valve body 32 and the outer wall of the piston rod 2.

[0079] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A plunger pressure plate pump, characterized in that, include: Pump body (1), which has a main cavity (10) inside, and a valve body structure (3) is provided inside the main cavity (10); The piston rod (2) passes through the main cavity (10) and the valve body structure (3) in a vertical direction. The valve body structure (3) is selectively opened as the piston rod (2) reciprocates. The glue dispensing drive (8) has its output end connected to the piston rod (2) and is used to drive the piston rod (2) to reciprocate in the vertical direction; A sealing assembly is installed on the valve body structure (3) to seal the gap between the valve body structure (3) and the inner wall of the main cavity (10) or the piston rod (2). The sealing assembly includes an elastic sealing ring (4) and a pressure ring (5). The elastic sealing ring (4) is provided with a pressure groove (41) extending in the circumferential direction. The elastic sealing ring (4) can be elastically deformed in the radial direction and has the tendency to keep the pressure groove (41) expanding. The pressure ring (5) is located at the opening of the pressure groove (41). The pressure ring (5) can extend into the pressure groove (41) and squeeze the inner wall of the pressure groove (41) to keep the pressure groove (41) in an expanded state.

2. The plunger pressure plate pump according to claim 1, characterized in that, The pressure ring (5) includes a platform part (51) and a pressing part (52). The pressing part (52) extends into the pressure groove (41) and simultaneously squeezes the inner walls of the inner and outer sides of the pressure groove (41).

3. The plunger pressure plate pump according to claim 1, characterized in that, The top of the pressure ring (5) is higher than the elastic sealing ring (4). Along the axial direction, the valve body structure (3) abuts against the top of the pressure ring (5). The end of the elastic sealing ring (4) with the groove is spaced apart from the top of the valve body structure (3) and the top of the pressure ring (5).

4. The plunger pressure plate pump according to claim 1, characterized in that, The elastic sealing ring (4) is embedded with an elastic structural member, which has the tendency to drive the pressure groove (41) to expand.

5. The plunger pressure plate pump according to claim 1, characterized in that, The elastic sealing ring (4) has sealing lips (42) on both the inner and outer sides of the groove end near the groove (41). The sealing lips (42) protrude radially from the body of the elastic sealing ring (4). The side wall of the sealing lip (42) has multiple scraping protrusions (43) spaced apart along its axial direction. The inner scraper ring (43) is used to abut against the valve body structure (3), and the outer scraper ring (43) is used to abut against the inner wall of the main cavity (10); or, The inner scraper ring (43) is used to abut against the piston rod (2), and the outer scraper ring (43) is used to abut against the valve body structure (3).

6. The plunger pressure plate pump according to claim 1, characterized in that, The valve body structure (3) includes a first valve body (31) and a second valve body (32). The piston rod (2) passes through the first valve body (31) and the second valve body (32) from top to bottom. When the piston rod (2) moves downward, the first valve body (31) opens and the second valve body (32) closes. When the piston rod (2) moves upward, the first valve body (31) closes and the second valve body (32) opens.

7. The plunger pressure plate pump according to claim 6, characterized in that, The adhesive flow channel of the first valve body (31) is located between the first valve body (31) and the piston rod (2). The sealing assembly installed on the first valve body (31) seals the gap between the first valve body (31) and the inner wall of the main cavity (10). The first valve body (31) is equipped with two symmetrically arranged sealing assemblies, and the grooves of the two pressure grooves (41) are arranged in opposite directions. The adhesive flow channel of the second valve body (32) is located between the second valve body (32) and the inner wall of the main cavity (10), and the sealing assembly installed on the second valve body (32) seals the gap between the second valve body (32) and the piston rod (2).

8. The plunger pressure plate pump according to claim 7, characterized in that, The piston rod (2) is provided with a first step (201) protruding from its outer peripheral wall. When the peripheral edge of the lower end opening of the first valve body (31) abuts against the first step (201), the glue flow channel of the first valve body (31) is closed. The main cavity (10) is provided with a second step (102) protruding from its inner wall. When the lower end of the second valve body (32) abuts against the second step (102), the adhesive flow channel of the second valve body (32) is closed.

9. The plunger pressure plate pump according to any one of claims 1-8, characterized in that, The upper opening of the pump body (1) is provided with a sealing seat (71) and an oil cup (72). The oil cup (72) is installed on the top of the sealing seat (71). The piston rod (2) passes through the oil cup (72) and the sealing seat (71) in sequence. The piston rod (2) is sealed to the sealing seat (71). The oil cup (72) is filled with lubricating oil.

10. The plunger pressure plate pump according to any one of claims 1-8, characterized in that, The upper end of the main cavity (10) forms a glue outlet cavity (20), which is provided with a glue outlet (101). A vent (12) is installed on the side of the glue outlet (101). The vent (12) can selectively connect the glue outlet cavity (20) with the external atmosphere.

11. The plunger pressure plate pump according to any one of claims 1-8, characterized in that, It also includes a base (11), a lifting drive mechanism (9) and a lifting platform (14). The lifting drive mechanism (9) is installed on the base (11), and the pump body (1) and the dispensing drive component (8) are both installed on the lifting platform (14). The lifting drive mechanism (9) includes a lifting shaft (91) that can extend and retract in the vertical direction. The upper end of the lifting shaft (91) is connected to the lifting platform (14). The lifting drive mechanism (9) is fitted with a metal guide sleeve (92), and the lifting shaft (91) is movably inserted through the metal guide sleeve (92). The inner wall of the metal guide sleeve (92) abuts against the outer peripheral wall of the lifting shaft (91) to limit the linear extension and retraction direction of the lifting shaft (91).

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