CN211777856U - Plunger type metering pump with replaceable plunger, pump head of plunger type metering pump and multi-cylinder plunger type metering pump - Google Patents

Abstract

The utility model relates to the design structure of a metering pump pump head, in particular to a plunger type metering pump pump head with a replaceable plunger, which comprises a pump head body and a plunger. A through medium channel, the pump head body is provided with a transversely through piston cavity, and the piston cavity is communicated with the medium channel; the plunger is movably arranged in the packing chamber; it also includes a packing chamber and a sealing module, the The packing chamber is in contact with the bottom of the piston chamber, and is used for sealing the piston chamber; the sealing module is installed at the end of the pump head body away from the plunger, and is used for disassembling and installing the packing chamber and the plunger; it is also used for sealing the piston chamber. The beneficial effects of the utility model are: by setting the pump head body and the sealing module, when the plunger and packing seal need to be replaced, the pump head body does not need to be disassembled and assembled, and the medium from the inlet and outlet valves to the pump head body does not need to be emptied, which eliminates the possibility of Existing security risks, but also reduce waste.

Description

Plunger metering pump with replaceable plunger and its pump head, multi-cylinder plunger metering pump

technical field

The utility model relates to a design structure of a pump head of a metering pump, in particular to a plunger type metering pump with a replaceable plunger, a pump head and a multi-cylinder plunger pump.

Background technique

The plunger of the plunger metering pump is generally sealed with packing. Since the packing seal and the plunger are both wearing parts, the packing seal and the plunger will wear out after a period of time. At this time, it is necessary to stop and replace the column. plug or seal.

In the prior art, to replace the plunger or packing seal of the plunger metering pump, it is necessary to disassemble and assemble the pipeline valve first, and then remove the pump head, take out the plunger or packing seal inside, and replace the new plunger or packing seal, so that The workload of disassembling and assembling the pipeline is huge, especially some pipe fittings and valves are relatively large, which increases the difficulty of disassembling and assembling, and the metering pump generally transports some corrosive media. When disassembling and assembling, it is necessary to empty the inlet and outlet valves to the pump head. The medium of the segment not only brings the hidden danger of insecurity, but also causes a lot of waste.

Utility model content

The purpose of the present invention is to provide a plunger type metering pump with a replaceable plunger, its pump head, and a multi-cylinder plunger pump, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the utility model provides the following technical solutions:

A plunger-type metering pump pump head with replaceable plunger, comprising a pump head body and a plunger, a check valve is oppositely installed on the side of the pump head body to form a longitudinally through medium channel, and the pump head body is provided with a transverse A through piston chamber, the piston chamber is communicated with the medium channel; the plunger is movably arranged in the packing chamber; it also includes a packing chamber and a sealing module, the packing chamber is in contact with the bottom of the piston chamber, and is used for The piston cavity is sealed; the sealing module is installed at the end of the pump head body away from the plunger, and is used for dismounting and installing the packing chamber and the plunger; and is also used for sealing the piston cavity.

As a further solution of the present invention, the one-way valve provided at the lower end of the medium channel is an inlet valve group, and the one-way valve provided at the upper end of the medium channel is an outlet valve group.

As a further solution of the present invention: the packing chamber includes a packing barrel, a packing and a packing gland, a flange step is arranged on the outer circumference of the top of the packing barrel to abut against the bottom of the pump head body, and the inside of the packing barrel is The hole and the plunger form an accommodating groove for accommodating the packing, and the packing gland is installed on the side end of the plunger away from the medium channel.

As a further solution of the present invention: the sealing module includes a gland and a fixed ring, the side of the packing chamber is provided with a threaded hole or an undercut, the fixed ring is provided with a fixed ring threaded hole, and the fixed ring is respectively connected with The gland is in contact with the packing chamber, and the gland is installed on the end of the pump head body away from the plunger; the side wall of the fixed ring is provided with a through hole penetrating the medium channel.

As a further solution of the present invention, it also includes a flange gland and a connecting body, the pump head body is mounted on the connecting body through the flange gland, and the connecting body is connected with an external mechanism.

As a further solution of the present invention: the sealing module further includes a sealing ring for sealing.

As a further solution of the present invention, the sealing ring adopts an O-ring and/or a tetrafluoro washer.

As another technical solution of the present utility model: a plunger-type metering pump with replaceable plunger, comprising a motor, a transmission part and the pump head of the plunger-type metering pump with replaceable plunger as described above.

As another technical solution of the present invention, a multi-cylinder plunger pump includes a motor unit, a transmission device and a plurality of plunger metering pump pump heads with replaceable plungers as described above.

Compared with the prior art, the beneficial effect of the present utility model is: by setting the pump head body and the sealing module, when the plunger and packing seal need to be replaced, the pump head body does not need to be disassembled and assembled, and the inlet and outlet valves do not need to be emptied to the pump head body. Only a small amount of medium in the pump head body needs to be emptied, which not only eliminates possible safety hazards, but also reduces waste.

Description of drawings

FIG. 1 is a cross-sectional view of a pump head of a plunger type metering pump with a replaceable plunger.

In the drawings: 1- outlet valve group, 2- fixed ring, 3- pump head body, 4- connecting body, 5- packing, 6- packing chamber, 7- packing gland, 8- plunger, 9- gland , 10-inlet valve group, 11-flange gland, 12-O-ring, 13-tetrafluoro washer, 14-threaded hole.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIG. 1 , in an embodiment of the present invention, a plunger-type metering pump pump head with a replaceable plunger includes a pump head body 3 and a plunger 8 , and a check valve is installed on the opposite side of the pump head body 3 A longitudinally through medium channel is formed, the pump head body 3 is provided with a laterally through piston cavity, and the piston cavity is communicated with the medium channel; the plunger 8 is movably arranged in the packing chamber 6; it also includes a packing chamber 6 and a sealing module, the packing chamber 6 is in contact with the bottom of the piston cavity to seal the piston cavity; the sealing module is installed on the end of the pump head body 3 away from the plunger, and is used for removing and installing the packing chamber 6 and plunger 8; also used to seal the piston cavity.

The one-way valve provided at the lower end of the medium channel is the inlet valve group 10 , and the one-way valve provided at the upper end of the medium channel is the outlet valve group 1 . The packing chamber 6 includes a packing barrel, a packing 5 and a packing gland 7. A flange step is provided on the outer circumference of the top of the packing barrel to contact the bottom of the pump head body 3, and the inner hole of the packing barrel is connected to the plunger. An accommodating groove for accommodating the packing is formed, and the packing gland 7 is installed on the side end of the plunger 8 away from the medium channel.

The sealing module includes a gland 9 and a fixed ring 2, the top of the packing chamber 6 is provided with a threaded hole or an undercut, the fixed ring 2 is provided with a fixed ring threaded hole, and the fixed ring 2 is respectively connected with the gland 9 and the fixed ring. The packing chamber 6 abuts, the gland 9 is installed on the end of the pump head body 3 away from the plunger 8 ; the side wall of the stationary ring 2 is provided with a through hole penetrating the medium channel.

Specifically, when the seal of the plunger 8 or the packing 5 needs to be replaced, remove the bolts on the gland 9, remove the gland 9 and the fixed ring 2 in turn, and then screw the plunger 8 from the cross head connected to it. Then, screw the two long bolts into the two threaded holes 14 provided at the top of the packing chamber for pulling, pull the packing chamber out of the piston cavity of the pump head body 3, and replace the plunger 8 or the packing 5 . After that, the packing 5, the packing gland 7 and the plunger 8 are sequentially filled into the packing barrel to form the packing chamber 6. The packing chamber 6 penetrates through the piston cavity of the pump head body 3 and presses against the inner side of the pump head body 3, and then is put into the fixed The ring 2 is against the packing chamber 6, and the fixed ring 2 simultaneously seals the two threaded holes 14 provided at the top of the packing chamber for pulling out, preventing the medium from damaging the threaded holes 14. Reinstall the gland 9. The whole process does not need to disassemble and assemble the inlet valve group, the outlet valve group and the pump head body 3, which reduces the workload of replacing the plunger and the sealing packing, and improves the work efficiency.

Preferably, the top of the fixed ring 2 is provided with a fixed ring threaded hole for pulling, and two long bolts are screwed into the fixed ring threaded hole, and the fixed ring is pulled out from the inner cavity of the pump head body 3, and then two long bolts are used to screw the fixed ring into the fixed ring threaded hole. The bolts are screwed into the two threaded holes 14 provided at the top of the packing chamber for pulling out, and the packing chamber is pulled out from the piston chamber. After the plunger 8 or the packing 5 is reset, the gland 9 is also used to seal the fixed ring threaded hole provided at the top of the fixed ring 2 for pulling.

Please refer to FIG. 1 , in the embodiment of the present invention, it also includes a flange gland 11 and a connecting body 4 , the pump head body 3 is installed on the connecting body 4 through the flange gland 11 , and the connecting body 4 is connected to the external Institutional connections. The sealing module also includes a sealing ring for sealing. The sealing ring adopts an O-ring 12 and/or a tetrafluoro washer 13 .

Specifically, the sealing ring adopts an O-ring, which is sleeved on the side and end of the flange step provided on the outer circumference of the top of the packing barrel, and is used to seal the medium in the piston cavity of the pump head body 3 .

Preferably, the sealing ring adopts an O-ring 12 and a tetrafluoro washer 13 . The O-ring is widely used, and is often used as a dynamic sealing ring for the reciprocating motion of the shaft and the low-speed rotational motion. Combined with the corrosion resistance, acid and alkali resistance of the PTFE gasket 13, it can better realize the protection of the medium in the piston cavity. seal. The O-ring 12 and the tetrafluoro washer 13 are respectively sleeved on the side and end of the flange step provided on the outer circumference of the top of the packing barrel, and are used to seal the medium in the piston cavity of the pump head body 3 .

Another embodiment provided by the present utility model: a plunger-type metering pump with replaceable plunger, comprising a motor, a transmission part and the pump head of the plunger-type metering pump with replaceable plunger as described above. The transmission member is cross-connected with the plunger, and the motor drives the plunger to move through the transmission member.

Specifically, for a plunger-type metering pump with a pump head of a plunger-type metering pump with a replaceable plunger, when the seal of the plunger 8 or the packing 5 needs to be replaced, remove the bolts on the gland 9, and then remove the gland in turn 9 and the fixed ring 2, then unscrew the plunger 8 from the cross head connected to it, and screw the two long bolts into the two threaded holes 14 provided at the top of the packing chamber for pulling, and the packing chamber Pull out from the piston cavity of the pump head body 3, and replace the plunger 8 or the packing 5. After that, the packing 5, the packing gland 7 and the plunger 8 are sequentially filled into the packing barrel to form the packing chamber 6. The packing chamber 6 penetrates through the piston cavity of the pump head body 3 and presses against the inside of the pump head body 3, and then is put into the fixed The ring 2 is against the packing chamber 6, and the fixed ring 2 simultaneously seals the two threaded holes 14 provided at the top of the packing chamber for pulling out, preventing the medium from damaging the threaded holes 14. Reinstall the gland 9. The whole process does not need to disassemble and assemble the inlet valve group, the outlet valve group and the pump head body 3, which reduces the workload of replacing the plunger and the sealing packing, and improves the work efficiency.

Another embodiment provided by the present utility model: a multi-cylinder plunger pump, comprising a motor unit, a transmission device and a plurality of plunger-type metering pump pump heads with replaceable plungers as described above. The transmission device is cross-connected with the plunger, and the motor group drives the plunger to move through the transmission device.

Specifically, a triplex plunger pump adopts three plunger type metering pump pump heads with replaceable plungers as described above; when the plunger 8 or the packing 5 seal wears and needs to be replaced, remove the pressure cap 9 Remove the gland 9 and the fixed ring 2 in turn, then unscrew the plunger 8 from the cross head connected to it, and use two long bolts to screw into the two provided at the top of the packing chamber for pulling out the threaded hole 14, pull out the packing chamber from the piston cavity of the pump head body 3, and replace the plunger 8 or the packing 5. After that, the packing 5, the packing gland 7 and the plunger 8 are sequentially filled into the packing barrel to form the packing chamber 6. The packing chamber 6 penetrates through the piston cavity of the pump head body 3 and presses against the inside of the pump head body 3, and then is put into the fixed The ring 2 is against the packing chamber 6, and the fixed ring 2 simultaneously seals the two threaded holes 14 provided at the topmost end of the packing chamber for pulling, so as to prevent the medium from damaging the threaded holes 14. Reinstall the gland 9. The whole process does not need to disassemble and assemble the inlet valve group, the outlet valve group and the pump head body 3, which reduces the workload of replacing the plunger and the sealing packing, and improves the work efficiency.

The working principle of the utility model: when the seal of the plunger 8 or the packing 5 needs to be replaced, remove the bolts on the gland 9, and take down the gland 9 and the fixed ring 2 in turn. Take the threaded hole of the fixed ring, screw it into the threaded hole of the fixed ring with two long bolts, and pull the fixed ring out of the inner cavity of the pump head body 3; then unscrew the plunger 8 from the cross head connected to it, and use two The long bolt is screwed into the two threaded holes 14 provided at the top of the packing chamber for pulling, and the packing chamber is pulled out from the inner cavity of the pump head body 3 to replace the plunger 8 or the packing 5 . After that, the packing 5 , the packing gland 7 and the plunger 8 are sequentially filled into the packing barrel to form the packing chamber 6 . The packing chamber 6 penetrates the inner cavity of the pump head body against the inner side of the pump head body 3 , and is then put into the fixed ring 2 Against the packing chamber, the fixed ring 2 simultaneously seals the two threaded holes 14 provided at the top of the packing chamber for pulling out, preventing the medium from damaging the threaded holes 14 . Reinstall the upper gland 7.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A plunger type metering pump head with a replaceable plunger comprises a pump head body and a plunger, wherein a one-way valve is oppositely arranged on the side of the pump head body to form a longitudinally through medium channel, a transversely through piston cavity is arranged on the pump head body, and the piston cavity is communicated with the medium channel; the plunger is movably arranged in the filling chamber; it is characterized by also comprising:

the packing chamber is abutted with the bottom of the piston cavity and used for sealing the piston cavity;

the sealing module is arranged at one end, far away from the plunger, of the pump head body and is used for detachably installing the packing chamber and the plunger; the piston cavity is also used for sealing the piston cavity, the check valve arranged at the lower end of the medium channel is an inlet valve group, and the check valve arranged at the upper end of the medium channel is an outlet valve group;

the packing chamber comprises a packing barrel, packing and a packing gland, a flange step is arranged on the outer circumference of the top end of the packing barrel and is abutted to the bottom of the pump head body, an inner hole of the packing barrel and the plunger form a containing groove for containing the packing, and the packing gland is sleeved at the side end, far away from the medium channel, of the plunger.

2. A plunger-replaceable plunger-type metering pump head according to claim 1, wherein the sealing module comprises a gland and a fixed ring, the packing chamber side is provided with a threaded hole or an inverted buckle, the fixed ring is provided with a fixed ring threaded hole, the fixed ring abuts against the gland and the packing chamber respectively, and the gland is mounted at one end of the pump head body away from the plunger; and the side wall of the fixed ring is provided with a through hole which penetrates through the medium channel.

3. A pump head for a plunger-replaceable plunger-type metering pump according to claim 1, further comprising a flange cover and a connecting body, wherein the pump head body is mounted on the connecting body through the flange cover, and the connecting body is connected to an external mechanism.

4. A pump head for a plunger-replaceable plunger-type metering pump according to claim 1, wherein the sealing module further comprises a sealing ring for sealing.

5. A pump head for a plunger-replaceable plunger-type metering pump according to claim 4, wherein the sealing ring is an O-ring and/or a Teflon gasket.

6. A plunger-replaceable plunger metering pump comprising a motor, a drive member and a plunger-replaceable plunger metering pump head according to any one of claims 1 to 5.

7. A multi-cylinder plunger pump comprising a motor assembly, gearing and a plurality of plunger-replaceable plunger metering pump heads according to any one of claims 1 to 5.

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