Single plunger pump and glue supply equipment for circulating glue supply

Abstract

The present invention belongs to the technical field of industrial glue supply equipment, and discloses a single plunger pump and glue supply equipment for circulating glue supply. It includes a pump body, a piston rod and two one-way valves. A piston cylinder and a branch pipe are arranged in intervals in the pump body; the pump body is also provided with an input channel and an output channel, and both ends of the piston cylinder and both ends of the branch pipe are respectively connected to the input channel and the output channel; the two one-way valves are both arranged in the input channel, one of the two one-way valves is arranged between the inlet of the input channel and the piston cylinder; the other is arranged between the piston cylinder and the branch pipe; the piston rod is sealingly slidably connected in the piston cylinder, and the piston rod can move toward the output channel to open the one-way valve between the input channel and the piston cylinder, and close the one-way valve between the piston cylinder and the branch pipe; or move toward the input channel to close the one-way valve between the input channel and the piston cylinder, and open the one-way valve between the piston cylinder and the branch pipe, thereby realizing uninterrupted and stable material transportation.

Description

Technical Field

[0001] The invention relates to the technical field of industrial glue supply equipment, and in particular to a single plunger pump and glue supply equipment for circulating glue supply. Background Art

[0002] In the application fields of various industrial glues, it is often necessary to use a feed pump to achieve efficient material transportation requirements due to changes in glue viscosity and fluidity. In the prior art, in the transportation scenarios of materials with different viscosities, the feeding is prone to intermittent, resulting in low glue supply efficiency and unstable delivery pressure; if a large feed pump similar to a double-plunger pump is used, the intermittent feeding situation can be improved, but the appearance is bloated and large, which is not conducive to later maintenance. Therefore, how to achieve uninterrupted and stable material transportation with a small-volume feed pump is one of the important issues that need to be solved for the current feed pump to achieve efficient material transportation requirements.

[0003] Therefore, there is an urgent need for a single plunger pump and glue supply equipment for circulating glue supply to solve the above technical problems. Summary of the invention

[0004] An object of the present invention is to provide a single plunger pump for circulating glue supply, which can realize uninterrupted and stable material transportation and has a compact structure and a small size.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Single plunger pump for circulating glue supply, including:

[0007] A pump body, wherein a piston cylinder and a branch pipe are arranged in the pump body; the pump body is also provided with an input channel and an output channel, and both ends of the piston cylinder and the two ends of the branch pipe are respectively connected to the input channel and the output channel;

[0008] Two one-way valves, both of which are arranged in the input channel, one of which is arranged between the inlet of the input channel and the piston cylinder; the other of which is arranged between the piston cylinder and the branch pipe;

[0009] A piston rod, the piston rod is sealingly and slidably connected in the piston cylinder, the piston rod can move toward the output channel to open the one-way valve between the inlet of the input channel and the piston cylinder, and close the one-way valve between the piston cylinder and the branch pipe; or the piston rod can move toward the input channel to close the one-way valve between the inlet of the input channel and the piston cylinder, and open the one-way valve between the piston cylinder and the branch pipe;

[0010] The one-way valve comprises:

[0011] A ball separation ring, the ball separation ring is sealably disposed in the input channel, one end of the ball separation ring is provided with a first communication hole to communicate with the inlet of the input channel or the piston cylinder; the other end is provided with a fixed end; the side wall of the ball separation ring is also provided with a second communication hole to communicate with the piston cylinder or the branch pipe;

[0012] A ball, the ball is slidably disposed in the inner cavity of the ball separation ring, and the diameter of the ball is larger than the diameter of the first connecting hole, so that the ball blocks or opens the first connecting hole;

[0013] An elastic member is disposed between the ball and the fixed end so as to elastically connect the ball and the fixed end.

[0014] Optionally, the piston rod divides the piston cylinder into a first chamber and a second chamber; the first chamber is connected to the input channel, and the second chamber is connected to the output channel;

[0015] When the piston rod moves toward the output channel, negative pressure is formed in the first chamber, so that the balls of the two one-way valves move toward the direction close to the first chamber; when the piston rod moves toward the input channel, positive pressure is formed in the first chamber, so that the balls of the two one-way valves move toward the direction away from the first chamber.

[0016] Optionally, a first sealing member is provided between the piston rod and the piston cylinder, and between the piston rod and the pump body.

[0017] Optionally, both the inlet of the input channel and the outlet of the output channel are connected with pipeline joints to dock with external structures.

[0018] Optionally, the piston cylinder is made of ceramic.

[0019] Optionally, a monitoring system is also included, and the monitoring system is used to detect and control the flow and / or pressure of the output channel.

[0020] Optionally, the monitoring system comprises a flow detection element, and the flow detection element is arranged on the output channel to detect the flow of the output channel; and / or;

[0021] The monitoring system comprises a pressure detection component, and the pressure detection component is arranged on the output channel to detect the pressure of the output channel.

[0022] Optionally, the monitoring system further comprises a control structure, and the control structure is electrically connected to the flow detection element, the pressure detection element and a driving system of the piston rod.

[0023] Another object of the present invention is to provide a glue supply device, comprising a single plunger pump for circulating glue supply as described in any of the above schemes, which can realize uninterrupted and stable material transportation.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a single plunger pump and glue supply equipment for circulating glue supply. A branch pipe is additionally provided, and then the branch pipe and the piston cylinder are connected through a one-way valve, and the piston cylinder and the inlet of an input channel are connected through the one-way valve, so that before the glue is supplied, the piston rod moves toward the output channel. At this time, the one-way valve between the piston cylinder and the inlet of the input channel is opened, and the one-way valve between the branch pipe and the piston cylinder is closed, and the material can enter the piston cylinder through the one-way valve, thereby realizing the input of the material in the piston cylinder. When it is supplying glue, when the piston rod moves toward the input channel, at this time, the one-way valve between the piston cylinder and the inlet of the input channel is closed, and the one-way valve between the branch pipe and the piston cylinder is opened, the material in the piston cylinder enters the branch pipe, and flows into the output channel through the branch pipe, part of the material flows out from the outlet of the output channel, and part of the material flows into the space connected to the piston cylinder and the output channel through the output channel, thereby realizing secondary storage; then when the piston rod moves toward the output channel again, the material in the space flows out through the output channel, and the space connected to the piston cylinder and the input channel continues to input material, so that while the piston cylinder inputs material, there will also be material outflow, thereby realizing the uninterrupted and stable glue supply effect of the single-plunger pump; and, it can realize the effect of continuous glue supply by adding a branch pipe to the single-plunger pump, which greatly reduces the volume and makes its structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of a single plunger pump for circulating glue supply provided by a specific embodiment of the present invention;

[0027] Figure 2 It is a flow state diagram of materials entering a single plunger pump for circulating glue supply provided by a specific embodiment of the present invention before glue supply;

[0028] Figure 3 It is a flow state diagram of the material when the single plunger pump for circulating glue supply provided by the specific embodiment of the present invention supplies glue in the first chamber;

[0029] Figure 4 It is a flow state diagram of the material when the single plunger pump for circulating glue supply provides glue in the second chamber according to a specific embodiment of the present invention.

[0030] In the figure:

[0031] 10. Pump body; 11. Piston cylinder; 111. First chamber; 112. Second chamber; 12. Branch pipe; 13. Input channel; 131. Inlet; 14. Output channel; 141. Outlet; 15. Connecting rod; 16. Straight pipe joint; 17. Plug;

[0032] 20. One-way valve; 21. Ball separation ring; 211. First communication hole; 22. Ball; 23. Elastic member;

[0033] 31. Piston rod; 32. Compression nut; 33. Sealing nut; 34. Bushing; 35. Gland;

[0034] 41. Flow detection part; 42. Pressure detection part;

[0035] 51. Universal seal ring; 52. O-ring; 60. Pipe joint; 70. Second sealing element. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] Refer to the following Figures 1 to 4 The present invention introduces a single plunger pump and glue supply equipment for circulating glue supply. It should be noted that: Figures 2 to 4 The arrows arranged inside the pump body 10 are the flow direction of the material, and the arrows indicating the direction arranged outside the pump body 10 are the movement direction of the piston rod 31 .

[0041] This embodiment provides a single-plunger pump for circulating glue supply. The single-plunger pump is applied to a glue supply device to enable the glue supply device to supply glue uninterruptedly and stably.

[0042] Please refer to Figure 1 Specifically, the single plunger pump for circulating glue supply includes a pump body 10, a piston rod 31 and two one-way valves 20. Among them, a piston cylinder 11 and a branch pipe 12 are arranged in the pump body 10; the pump body 10 is also provided with an input channel 13 and an output channel 14, and both ends of the piston cylinder 11 and both ends of the branch pipe 12 are respectively connected to the input channel 13 and the output channel 14; the two one-way valves 20 are both arranged in the input channel 13, and one of the two one-way valves 20 is arranged between the inlet 131 of the input channel 13 and the piston cylinder 11, so as to control the on-off between the above two; the other of the two one-way valves 20 is arranged between the piston cylinder 11 and the branch pipe 12 between the two, so as to control the on-off between the above two; the piston rod 31 is sealingly and slidably connected in the piston cylinder 11, and the piston rod 31 can move toward the output channel 14 to open the one-way valve 20 between the inlet 131 of the input channel 13 and the piston cylinder 11, and the one-way valve 20 between the piston cylinder 11 and the branch pipe 12 is closed; or the piston rod 31 can move toward the input channel 13 to close the one-way valve 20 between the inlet 131 of the input channel 13 and the piston cylinder 11, and the one-way valve 20 between the piston cylinder 11 and the branch pipe 12 is opened.

[0043] The single plunger pump for circulating glue supply in this embodiment is provided with a branch pipe 12, and the branch pipe 12 and the piston cylinder 11 are connected through a one-way valve 20, and the piston cylinder 11 and the inlet 131 of the input channel 13 are connected through the one-way valve 20, so that before the single plunger pump supplies glue, please refer to Figure 2, the piston rod 31 moves toward the output channel 14. At this time, the one-way valve 20 between the piston cylinder 11 and the inlet 131 of the input channel 13 is opened, and the one-way valve 20 between the branch pipe 12 and the piston cylinder 11 is closed. The material can enter the piston cylinder 11 through the one-way valve 20, thus realizing the input of the material in the piston cylinder 11. When supplying glue, please refer to Figure 3 When the piston rod 31 moves toward the input channel 13, at this time, the one-way valve 20 between the piston cylinder 11 and the inlet 131 of the input channel 13 is closed, and the one-way valve 20 between the branch pipe 12 and the piston cylinder 11 is opened, and the material in the piston cylinder 11 enters the branch pipe 12 and flows into the output channel 14 through the branch pipe 12, and part of the material flows out from the outlet 141 of the output channel 14, and part of the material flows into the space connecting the piston cylinder 11 and the output channel 14 through the output channel 14, so as to realize secondary storage; please refer to Figure 4 Then, when the piston rod 31 moves toward the output channel 14 again, the material in the space flows out through the output channel 14, and the space connected to the piston cylinder 11 and the input channel 13 continues to input the material, so that while the piston cylinder 11 inputs the material, the material will also flow out, thereby achieving an uninterrupted and stable glue supply effect of the single-plunger pump; and, it can achieve the effect of continuous glue supply by adding a branch pipe 12 to the single-plunger pump, which greatly reduces the volume and makes its structure more compact.

[0044] Please refer to Figures 1 to 4 Furthermore, the one-way valve 20 includes a ball separation ring 21, a ball 22 and an elastic member 23, wherein the ball separation ring 21 is sealed in the input channel 13, and a first connecting hole 211 is provided at one end of the ball separation ring 21 to connect to the inlet 131 of the input channel 13 or the piston cylinder 11; a fixed end is provided at the other end; a second connecting hole is also provided on the side wall of the ball separation ring 21 to connect to the piston cylinder 11 or the branch pipe 12; the ball 22 is slidably arranged in the inner cavity of the ball separation ring 21, and the diameter of the ball 22 is larger than the diameter of the first connecting hole 211, so that the ball 22 blocks or opens the first connecting hole 211; the elastic member 23 is arranged between the ball 22 and the fixed end, so that the ball 22 and the fixed end are elastically connected. When in use, when the ball 22 is not affected by external force, the one-way valve 20 blocks the first connecting hole 211, so that the first connecting hole 211 and the second connecting hole cannot be connected, thereby achieving the closing effect of the one-way valve 20; when the ball 22 is affected by external force, the ball 22 compresses the elastic member 23, so that the ball 22 moves away from the first connecting hole 211, thereby achieving the opening of the first connecting hole 211, and then achieving the connection between the first connecting hole 211 and the second connecting hole, so as to achieve the opening effect of the one-way valve 20; thereby achieving the uninterrupted and stable glue supply effect of the single-plunger pump.

[0045] Please refer to Figure 1In this embodiment, a sealing nut 33 is sleeved on the piston rod 31, and the sealing nut 33 is threadedly connected to the through hole position of the pump body 10, and then the clamping nut 32 is threadedly connected to the inner ring of the sealing nut 33, so that the sealing nut 33 is pressed and set at the through hole position of the pump body 10, thereby fixing the sealing nut 33 and further achieving the supporting and limiting effect on the piston rod 31.

[0046] Furthermore, since the piston rod 31 is slidably inserted into the pump body 10 , a bushing 34 is provided on the outer periphery of the piston rod 31 between the sealing nut 33 and the clamping nut 32 to improve the sealing and wear resistance of the piston rod 31 .

[0047] Optionally, a driving system is provided at one end of the piston rod 31 away from the piston cylinder 11 to drive the piston rod 31 to reciprocate. Specifically, the driving system of the piston rod 31 can be pneumatic, hydraulic, linear motor, etc., which is not specifically limited here.

[0048] Furthermore, a first seal is provided between the piston rod 31 and the piston cylinder 11 , and between the piston rod 31 and the pump body 10 , so as to achieve a sealing effect between the piston cylinder 11 and the piston rod 31 , and a sealing effect when the piston rod 31 passes through the pump body 10 .

[0049] Specifically, the first seal between the piston rod 31 and the pump body 10 includes an O-ring 52 and a Variseal ring 51. The Variseal ring 51 is arranged between the sealing nut 33 and the piston rod 31, and the O-ring 52 is arranged between the sealing nut 33 and the through hole of the pump body 10, so as to achieve the sealing effect between the sealing nut 33 and the piston rod 31, and the sealing effect between the sealing nut 33 and the pump body 10. The Variseal ring 51 is arranged at the position in contact with the piston rod 31 because the Variseal ring 51 is a high-performance seal with wear resistance and low friction coefficient, which helps to reduce friction, thereby reducing the wear of the Variseal ring 51 during the sliding process of the piston rod 31, thereby improving the sealing fatigue problem at this position and increasing its service life. At other positions, only the sealing effect is required, so only the O-ring 52 is required.

[0050] Specifically, the first seal between the piston rod 31 and the piston cylinder 11 includes an O-ring 52 and a Variseal ring 51. The Variseal ring 51 is arranged between the piston rod 31 and the inner wall of the piston cylinder 11 to achieve the sealing effect and wear resistance of the two. At the same time, a gland 35 is arranged at one end of the piston rod 31 facing the input channel 13. An O-ring 52 is arranged between the gland 35 and the piston rod 31, and a Variseal ring 51 is arranged between the gland 35 and the inner wall of the piston cylinder 11. The Variseal ring 51 is arranged at the position in contact with the piston rod 31 because the Variseal ring 51 is a high-performance seal with wear resistance and low friction coefficient, which helps to reduce friction, thereby reducing the wear of the Variseal ring 51 during the sliding process of the piston rod 31, thereby improving the sealing fatigue problem at this position and increasing its service life. At other positions, only the sealing effect is required, so only the O-ring 52 is required.

[0051] Optionally, the piston cylinder 11 is made of ceramic, which has a certain anti-wear effect, improves the phenomenon that the piston cylinder 11 is worn by metal particles in the material, and increases the service life of the piston cylinder 11.

[0052] Furthermore, both the inlet 131 of the input channel 13 and the outlet 141 of the output channel 14 are connected with pipeline joints 60 to dock with external structures, thereby realizing the input and output of materials.

[0053] Optionally, in this embodiment, the input channel 13 further includes two openings, one of the two openings is an inlet 131 , and the other is an installation port, so as to facilitate the installation of the one-way valve 20 .

[0054] Further optionally, a plug 17 is sealed at the installation opening of the input channel 13 to achieve a plugging effect on the installation opening of the input channel 13 .

[0055] Optionally, in this embodiment, the output channel 14 further includes an opening, serving as an outlet 141 of the single-plunger pump, to achieve the glue supply function of the single-plunger pump.

[0056] Optionally, the input channel 13 and the output channel 14 are further connected via a connecting rod 15 to improve the structural strength of the single plunger pump.

[0057] Please refer to Figures 1 to 4In this embodiment, the piston rod 31 divides the piston cylinder 11 into a first chamber 111 and a second chamber 112; the first chamber 111 is connected to the input channel 13, and the second chamber 112 is connected to the output channel 14. When the piston rod 31 moves toward the output channel 14, a negative pressure is formed in the first chamber 111, so that the balls 22 of the two one-way valves 20 move toward the direction close to the first chamber 111; at this time, the one-way valve 20 between the inlet 131 of the input channel 13 and the piston cylinder 11 is opened, and the one-way valve 20 between the piston cylinder 11 and the branch pipe 12 is closed, so that the material enters the first chamber 111. When the piston rod 31 moves toward the input channel 13, a positive pressure is formed in the first chamber 111, so that the balls 22 of the two one-way valves 20 move in a direction away from the first chamber 111; at this time, the one-way valve 20 between the inlet 131 of the input channel 13 and the piston cylinder 11 is closed, and the one-way valve 20 between the piston cylinder 11 and the branch pipe 12 is opened, so that the material can be transported from the first chamber 111 to the branch pipe 12, and then part of the material can be transported to the outlet 141 through the branch pipe 12, and part of the material can be transported to the second chamber 112 for storage.

[0058] Optionally, a second sealing member 70 is provided between the input channel 13 and the ball separation ring 21 to achieve sealing between the one-way valve 20 and the input channel 13, thereby dividing the input channel 13 into an area connected to the piston cylinder 11 and an area connected to the branch pipe 12, and the two can only be connected through the first connecting hole 211 of the corresponding one-way valve 20.

[0059] Optionally, the second sealing member 70 in this embodiment is an O-ring, which can achieve a sealed connection between the two.

[0060] In this embodiment, the single-plunger pump for circulating glue supply also includes a monitoring system, which is used to detect and control the flow rate and / or pressure of the output channel 14, thereby realizing the detection of the flow rate and pressure of the outlet 141 for glue supply, and adjusting the single-plunger pump according to the detected flow rate and pressure to realize automatic compensation of material supply, thereby achieving the stability of its glue supply, avoiding the instability of the glue supply amount and pressure when the piston rod 31 moves in two directions, and improving the reliability of the single-plunger pump for circulating glue supply.

[0061] Please continue to refer to Figure 1 Specifically, the monitoring system includes a flow detection member 41, which is disposed on the output channel 14 to detect the flow of the output channel 14; and / or, the monitoring system includes a pressure detection member 42, which is disposed on the output channel 14 to detect the pressure of the output channel 14. More specifically, the monitoring system in this embodiment includes the flow detection member 41 and the pressure detection member 42, so that the monitoring system can realize multi-directional monitoring of the material feeding by detecting the flow rate and pressure of the material.

[0062] More specifically, the flow detection member 41 and the pressure detection member 42 are both connected to the output channel 14 through the straight pipe joint 16 to detect the flow rate and pressure of the material flowing through them. Exemplarily, in this embodiment, the outlet 141 of the output channel 14 is sequentially connected to the flow detection member 41, the pressure detection member 42 and the pipeline joint 60 through the straight pipe joint 16, which can not only detect the flow rate and pressure of the material in the output pipeline, but also connect to the external pipeline.

[0063] Furthermore, the monitoring system also includes a control structure, which is electrically connected to the flow detection member 41, the pressure detection member 42 and the driving system of the piston rod 31. When in use, the flow detection member 41 and the pressure detection member 42 detect the flow rate and pressure of the respective materials when the piston rod 31 moves in two directions, and feed back to the control structure. The control structure controls the driving system of the piston rod 31 through comparison and analysis to slow down or speed up the movement of the piston rod 31, thereby achieving stable control of the glue supply amount and pressure when the piston rod 31 moves in two directions, and achieving compensation for the material.

[0064] It is understandable that the control structure may adopt a control system commonly used in the art such as PLC, and its specific structure will not be described in detail here.

[0065] This embodiment also provides a glue supply device, which includes a single plunger pump for circulating glue supply according to any of the above solutions. By adopting the single plunger pump, the glue supply device can supply glue continuously and stably without occupying a large space, thereby improving volume utilization.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A single plunger pump for circulating glue supply, characterized in that: include: A pump body, wherein a piston cylinder and a branch pipe are arranged at intervals in the pump body; the pump body is also provided with an input channel and an output channel, and both ends of the piston cylinder and both ends of the branch pipe are respectively connected to the input channel and the output channel; Two one-way valves, both of which are arranged in the input channel, one of which is arranged between the inlet of the input channel and the piston cylinder; the other of which is arranged between the piston cylinder and the branch pipe; A piston rod, the piston rod is sealingly and slidably connected in the piston cylinder, the piston rod can move toward the output channel to open the one-way valve between the inlet of the input channel and the piston cylinder, and close the one-way valve between the piston cylinder and the branch pipe; or the piston rod can move toward the input channel to close the one-way valve between the inlet of the input channel and the piston cylinder, and open the one-way valve between the piston cylinder and the branch pipe; The non-return valve includes: A ball separation ring, the ball separation ring is sealed and arranged in the input channel, one end of the ball separation ring is provided with a first communication hole to connect with the inlet of the input channel or the piston cylinder; the other end is provided with a fixed end; the side wall of the ball separation ring is also provided with a second communication hole to connect with the piston cylinder or the branch pipe; A ball, which is slidably disposed in the inner cavity of the ball separation ring, and the diameter of the ball is larger than the diameter of the first communication hole, so that the ball blocks or opens the first communication hole; An elastic member, the elastic member is arranged between the ball and the fixed end so as to elastically connect the ball and the fixed end; The piston rod divides the piston cylinder into a first chamber and a second chamber; the first chamber is connected to the input channel, and the second chamber is connected to the output channel; When the piston rod moves toward the output channel, negative pressure is formed in the first chamber, so that the balls of the two one-way valves move toward the direction close to the first chamber; when the piston rod moves toward the input channel, positive pressure is formed in the first chamber, so that the balls of the two one-way valves move toward the direction away from the first chamber.

2. The single plunger pump for circulating glue supply according to claim 1, characterized in that: A first sealing member is provided between the piston rod and the piston cylinder, and between the piston rod and the pump body.

3. The single plunger pump for circulating glue supply according to claim 1, characterized in that: The inlet of the input channel and the outlet of the output channel are both connected with pipeline joints to connect with the external structure.

4. The single plunger pump for circulating glue supply according to claim 1, characterized in that: The piston cylinder is made of ceramic.

5. The single plunger pump for circulating glue supply according to any one of claims 1 to 4, characterized in that: Also included is a monitoring system, which is used to detect and control the flow rate and / or pressure of the output channel.

6. The single plunger pump for circulating glue supply according to claim 5, characterized in that: The monitoring system includes a flow detection element, which is arranged on the output channel to detect the flow of the output channel; and / or; The monitoring system comprises a pressure detection component, which is arranged on the output channel to detect the pressure of the output channel.

7. The single plunger pump for circulating glue supply according to claim 6, characterized in that: The monitoring system also includes a control structure, which is electrically connected to the flow detection component, the pressure detection component and the driving system of the piston rod.

8. Glue supply equipment, characterized in that: It comprises a single plunger pump for circulating glue supply as claimed in any one of claims 1 to 7.

Images