Plunger pump for glue injection machine

Abstract

The utility model relates to a plunger pump for a glue injection machine, which belongs to the field of pumps and comprises a pump body and a piston rod, an end cover is arranged at one end of the pump body, the piston rod penetrates through the end cover and is in sliding and sealing connection with the end cover, and the outer end of the piston rod is connected with a driving device. The piston rod is driven by a driving device to reciprocate in the pump body in the length direction of the piston rod, and a flushing cavity is formed in the end cover and connected with a flushing device. The flushing device comprises a flushing barrel, the output end of the flushing barrel is communicated with the flushing cavity through a first flushing pipe, the input end of the flushing barrel is communicated with the flushing cavity through a second flushing pipe, and the first flushing pipe is connected with a flushing motor pump set. The powder filler and the color paste in the flushing cavity are flushed out of the flushing cavity through directional flowing of cleaning liquid in the flushing cavity, so that high-pressure flushing of the flushing cavity is achieved, the piston rod and the end cover are prevented from being stuck, the maintenance frequency is reduced, and the equipment stability is improved.

Description

Technical Field

[0001] The utility model relates to a plunger pump used for a glue injection machine, belonging to the field of pumps. Background Art

[0002] The pultrusion process is to form and solidify the raw materials through an extrusion die under the action of traction, and continuously produce profiles of unlimited length. During the pultrusion process, it is necessary to mix multiple glues and inject them into the mold of the composite material product at the required speed and pressure using a glue injection machine. Among them, the pump is a machine used in the glue injection machine to increase the pressure of the glue and make the glue flow. The pump transmits the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid.

[0003] The utility model patent with announcement number CN206477987U discloses a plunger pump including a pump housing, which is fixed to a frame; a power mechanism, whose fixed end is fixed to the pump housing; a plunger, which moves up and down along the pump chamber of the pump housing through the movable end of the power mechanism; a first fluid channel; a second fluid channel; a first one-way valve mechanism; and a second one-way valve mechanism. The utility model prevents the backflow of the first fluid channel and the second fluid channel by the above two one-way valve mechanisms, so that when the plunger reciprocates, the one-way valve mechanism can be used to hinder the backflow of the fluid so as to continuously pump the fluid out from the fluid outlet when the plunger moves up and down. However, in the prior art, powder fillers and color pastes are added to the glue. After the plunger moves for a long time, the powder fillers and color pastes are easy to enter the gap between the plunger and the pump housing, causing the plunger to be blocked, and in severe cases, it may even cause it to get stuck, increasing the number of maintenance times and reducing the stability of the equipment.

[0004] Therefore, there is a need for a plunger pump for a glue injection machine to reduce the number of maintenance times and improve the stability of the equipment. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a plunger pump for a glue injection machine is provided which reduces the number of maintenance times and improves the stability of equipment.

[0006] The technical solution adopted by the utility model to solve the above problems is: a plunger pump for a glue injection machine, comprising a pump body and a piston rod, one end of the pump body is provided with an end cover, the piston rod passes through the end cover, the piston rod and the end cover are slidably and sealedly connected, the outer end of the piston rod is connected to a driving device, the piston rod is driven by the driving device to reciprocate in the pump body along the length direction of the piston rod, the end cover is provided with a flushing cavity, and the flushing cavity is connected to the flushing device;

[0007] The flushing device comprises a flushing bucket, the output end of the flushing bucket is connected to the flushing cavity through a first flushing pipe, the input end of the flushing bucket is connected to the flushing cavity through a second flushing pipe, and a flushing motor pump group is connected to the first flushing pipe.

[0008] Preferably, the end cover is connected to the piston rod via a sealing ring.

[0009] Preferably, two sealing rings are provided, and the two sealing rings are spaced apart along the length direction of the piston rod.

[0010] Preferably, the flushing chamber is located between two sealing rings.

[0011] Preferably, a flushing pressure regulating valve is connected to the first flushing pipe.

[0012] Preferably, a flushing flow regulating valve is connected to the second flushing pipe.

[0013] Preferably, the driving device comprises a servo electric cylinder, and an output end of the servo electric cylinder is connected to an outer end of a piston rod.

[0014] Preferably, the output end of the servo electric cylinder is connected to one end of the piston rod via a pin.

[0015] Preferably, the piston rod divides the inner cavity of the pump body into a rodless cavity and a rod cavity, and the rodless cavity is connected to the glue supply system.

[0016] Preferably, it also includes a control valve group, which includes an input pipe, an output pipe and a connecting pipe. The input pipe is connected to the input end of the pump body, and the output pipe is connected to the output end of the pump body. A first one-way valve is installed on the input pipe. The input pipe and the output pipe are connected by a connecting pipe. A second one-way valve is installed on the connecting pipe. The connecting end of the connecting pipe and the input pipe is located between the first one-way valve and the pump body. One end of the input pipe is connected to the rodless chamber, and one end of the output pipe is connected to the rod chamber.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The utility model discloses a plunger pump for a glue injection machine, which flushes powder fillers and color paste in the flushing chamber out of the flushing chamber through the directional flow of cleaning liquid in the flushing chamber, thus realizing high-pressure flushing of the flushing chamber, avoiding jamming between a piston rod and an end cover, reducing the number of maintenance times, and improving the stability of the equipment. At the same time, it also realizes circulating lubrication of the flushing chamber, reducing the friction between the piston rod and the end cover. In addition, the control valve group and the pump body form a split type, which is convenient for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a three-dimensional diagram of a plunger pump for a glue injection machine according to the utility model;

[0020] Figure 2 This is a system diagram of a plunger pump for a glue injection machine according to the utility model;

[0021] Figure 3 A cross-sectional view of the pump body.

[0022] in:

[0023] Pump body 3051, piston rod 3052, end cover 3053, rodless chamber 3054, rod chamber 3055, sealing ring 3056, flushing chamber 3057;

[0024] Driving device 317, flushing device 318, control valve group 319;

[0025] Servo electric cylinder 3171, pin shaft 3172;

[0026] A flushing barrel 3181, a first flushing pipe 3182, a second flushing pipe 3183, a flushing pressure regulating valve 3184, a flushing motor pump group 3185, and a flushing flow regulating valve 3186;

[0027] Input pipe 3191 , output pipe 3192 , connecting pipe 3193 , first one-way valve 3194 , second one-way valve 3195 . DETAILED DESCRIPTION

[0028] like Figure 1-3As shown, a plunger pump for a glue injection machine in this embodiment includes a pump body 3051 and a piston rod 3052, and the pump body 3051 and the piston rod 3052 are equivalent to the plunger and the pump housing in the prior art. One end of the pump body 3051 is provided with an end cover 3053, and the piston rod 3052 passes through the end cover 3053. The piston rod 3052 and the end cover 3053 are slidably and sealedly connected. The piston rod 3052 divides the cavity in the pump body 3051 into a rodless cavity 3054 and a rod cavity 3055, and the rodless cavity 3054 is connected to the glue supply system. The outer end of the piston rod 3052 is connected to the driving device 317, and the driving device 317 drives the piston rod 3052 in the pump body 3051 It moves back and forth along the length direction of the piston rod 3052. The end cover 3053 is connected to the piston rod 3052 through two sealing rings 3056. The two sealing rings 3056 are spaced apart along the length direction of the piston rod 3052. A flushing cavity 3057 is provided on the end cover 3053. The flushing cavity 3057 is located between the two sealing rings 3056. The flushing cavity 3057 is connected to a flushing device 318. Powder fillers and color paste are added to the glue. The powder fillers and color paste easily enter between the piston rod 3052 and the end cover 3053. The powder fillers and color paste between the piston rod 3052 and the end cover 3053 are flushed away by the flushing device 318 to avoid blockage, reduce the number of maintenance times, and improve the stability of the equipment.

[0029] The flushing device 318 includes a flushing bucket 3181, the output end of the flushing bucket 3181 is connected to the flushing chamber 3057 through a first flushing pipe 3182, and the input end of the flushing bucket 3181 is connected to the flushing chamber 3057 through a second flushing pipe 3183. The first flushing pipe 3182 is connected to a flushing pressure regulating valve 3184 and a flushing motor pump group 3185, and the second flushing pipe 3183 is connected to a flushing flow regulating valve 3186. During the start-up of the flushing motor pump group 3185, the flushing liquid in the flushing bucket 3181 is discharged from the first flushing pipe 3184 to the flushing chamber 3057. 2 is transported to the flushing chamber 3057, and the flushing liquid in the flushing chamber 3057 flows back to the flushing barrel 3181 from the second flushing pipe 3183. During the reciprocating movement of the piston rod 3052, the powder filler and the color paste between the piston rod 3052 and the end cover 3053 enter the flushing chamber 3057. With the directional flow of the cleaning liquid in the flushing chamber 3057, the powder filler and the color paste in the flushing chamber 3057 are flushed out of the flushing chamber 3057, that is, the powder filler and the color paste in the flushing chamber 3057 are cleared, thereby avoiding blockage, reducing the number of maintenance times, and improving the stability of the equipment;

[0030] The driving device 317 includes a servo electric cylinder 3171, the output end of which is connected to the outer end of the piston rod 3052 via a pin shaft 3172. During the start-up of the servo electric cylinder 3171, the output end of the servo electric cylinder 3171 drives the piston rod 3052 to reciprocate on the pump body 3051 via the pin shaft 3172.

[0031] The single piston pump 305 further includes a control valve group 319, which includes an input pipe 3191, an output pipe 3192 and a connecting pipe 3193. The input pipe 3191 is connected to the input end of the pump body 3051, and the output pipe 3192 is connected to the output end of the pump body 3051. A first check valve 3194 is installed on the input pipe 3191. The input pipe 3191 and the output pipe 3192 are connected through the connecting pipe 3193. A second check valve 3195 is installed on the connecting pipe 3193. The connecting end of the connecting pipe 3193 and the input pipe 3191 is located between the first check valve 3194 and the pump body 3051. One end of the input pipe 3191 is communicated with the rodless chamber 3054, and one end of the output pipe 3192 is communicated with the rod chamber 3055.

[0032] Here, the control valve group 319 and the pump body 3051 are separated to facilitate subsequent maintenance;

[0033] During operation, the servo electric cylinder 3171 is started, and the output end of the servo electric cylinder 3171 drives the piston rod 3052 to reciprocate on the pump body 3051 through the pin shaft 3172. When the piston rod 3052 moves away from the rodless chamber 3054, the glue in the glue supply system is transported from the input pipe 3191 to the rodless chamber 3054, and the glue in the rod chamber 3055 is output from the output pipe 3192. Due to the one-way characteristic of the second one-way valve 3195, the glue in the second pipeline 303 cannot be transported from the connecting pipe 3193 When the piston rod 3052 moves in the reverse direction, the glue in the rodless chamber 3054 is transported to the input pipe 3191. Due to the one-way characteristic of the first one-way valve 3194, the glue in the input pipe 3191 can only be transported from the connecting pipe 3193 to the output pipe 3192. A part of the glue in the output pipe 3192 flows back to the rod chamber 3055, and another part of the glue in the output pipe 3192 is discharged from the end away from the pump body 3051. In this cycle, the output pipe 3192 is continuously discharged.

[0034] Secondly, during operation, the flushing motor pump group 3185 is started, and the flushing liquid in the flushing barrel 3181 is transported from the first flushing pipe 3182 to the flushing chamber 3057, and the pressure in the flushing chamber 3057 increases. The flushing liquid in the flushing chamber 3057 then flows back from the second flushing pipe 3183 to the flushing barrel 3181. During the reciprocating movement of the piston rod 3052, the powder filler and color paste between the piston rod 3052 and the end cover 3053 enter the flushing chamber 3057. With the directional flow of the cleaning liquid in the flushing chamber 3057, the powder filler and color paste in the flushing chamber 3057 are flushed out of the flushing chamber 3057, that is, high-pressure flushing of the flushing chamber 3057 is achieved, and the piston rod 3052 and the end cover 3053 are prevented from getting stuck due to impurities, thereby reducing the number of maintenance times and improving the stability of the equipment. In fact, the flushing liquid also has a lubricating effect, which achieves circulating lubrication of the flushing chamber 3057 and reduces the friction between the piston rod 3052 and the end cover 3053.

[0035] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A plunger pump for a glue injection machine, comprising a pump body (3051) and a piston rod (3052), wherein one end of the pump body (3051) is provided with an end cover (3053), the piston rod (3052) passes through the end cover (3053), the piston rod (3052) and the end cover (3053) are slidably and sealedly connected, the outer end of the piston rod (3052) is connected to a driving device (317), and the driving device (317) drives the piston rod (3052) to reciprocate in the pump body (3051) along the length direction of the piston rod (3052), characterized in that: The end cover (3053) is provided with a flushing cavity (3057), and the flushing cavity (3057) is connected to a flushing device (318); The flushing device (318) comprises a flushing bucket (3181), the output end of the flushing bucket (3181) is connected to the flushing chamber (3057) via a first flushing pipe (3182), the input end of the flushing bucket (3181) is connected to the flushing chamber (3057) via a second flushing pipe (3183), and the first flushing pipe (3182) is connected to a flushing motor pump group (3185).

2. A plunger pump for a glue injection machine according to claim 1, characterized in that: The end cover (3053) is connected to the piston rod (3052) via a sealing ring (3056).

3. A plunger pump for a glue injection machine according to claim 2, characterized in that: Two sealing rings (3056) are provided, and the two sealing rings (3056) are spaced apart along the length direction of the piston rod (3052).

4. A plunger pump for a glue injection machine according to claim 3, characterized in that: The flushing chamber (3057) is located between the two sealing rings (3056).

5. The plunger pump for a glue injection machine according to claim 1, characterized in that: The first flushing pipe (3182) is connected to a flushing pressure regulating valve (3184).

6. A plunger pump for a glue injection machine according to claim 1, characterized in that: The second flushing pipe (3183) is connected to a flushing flow regulating valve (3186).

7. The plunger pump for a glue injection machine according to claim 1, characterized in that: The driving device (317) comprises a servo electric cylinder (3171), and the output end of the servo electric cylinder (3171) is connected to the outer end of the piston rod (3052).

8. The plunger pump for a glue injection machine according to claim 7, characterized in that: The output end of the servo electric cylinder (3171) is connected to one end of the piston rod (3052) via a pin shaft (3172).

9. The plunger pump for a glue injection machine according to claim 1, characterized in that: The piston rod (3052) divides the inner cavity of the pump body (3051) into a rodless cavity (3054) and a rod cavity (3055), and the rodless cavity (3054) is connected to the glue supply system.

10. A plunger pump for a glue injection machine according to claim 9, characterized in that: The pump body (3051) further comprises a control valve group (319), wherein the control valve group (319) comprises an input pipe (3191), an output pipe (3192) and a connecting pipe (3193), wherein the input pipe (3191) is connected to the input end of the pump body (3051), the output pipe (3192) is connected to the output end of the pump body (3051), a first check valve (3194) is installed on the input pipe (3191), and the input pipe (3191) and the output pipe (3192) are connected to the output end of the pump body (3051). The tube (3192) is connected via a connecting tube (3193), a second one-way valve (3195) is installed on the connecting tube (3193), the connecting end of the connecting tube (3193) and the input tube (3191) is located between the first one-way valve (3194) and the pump body (3051), one end of the input tube (3191) is connected to the rodless chamber (3054), and one end of the output tube (3192) is connected to the rod chamber (3055).

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