CN115143092A

CN115143092A - Reciprocating pump capable of backwashing

Info

Publication number: CN115143092A
Application number: CN202210947771.6A
Authority: CN
Inventors: 周财华; 周良; 严红芳
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-10-04

Abstract

The invention discloses a reciprocating pump capable of backwashing, which comprises: the cylinder sleeve is provided with a connecting channel; the pump head is connected with the cylinder sleeve, a medium cavity is formed in the pump head, and the medium cavity is communicated with the cylinder sleeve; the inlet one-way valve and the outlet one-way valve are both communicated with the medium cavity; the plunger is movably arranged in the cylinder sleeve, a first gap is formed between the plunger and the cylinder sleeve, and the first gap is communicated with the medium cavity and the connecting channel; the liquid inlet pipe can be communicated with the connecting channel. In the imbibition process, let in the material in to first gap through the feed liquor pipe to prevent the medium of medium intracavity to get into first gap, and then avoid the solid particle in the medium to damage the plunger.

Description

Reciprocating pump capable of backwashing

Technical Field

The invention relates to the technical field of reciprocating pumps, in particular to a reciprocating pump capable of backwashing.

Background

The three-plunger reciprocating pump is a positive displacement pump, achieves the purpose of conveying liquid by means of the periodic change of the volume in a working cavity, is widely applied to various industries such as petroleum, chemical industry, water supply, thermoelectricity, nuclear industry, pharmacy, food and the like, has strong professional matching performance, and can meet the requirements of different customers and different process working conditions.

A reciprocating pump for a boiling bed residual oil hydrogenation device in the refining industry belongs to a high-temperature, high-pressure and large-flow reciprocating pump and is necessary equipment for residual oil hydrogenation. At present, the reciprocating pump under the high-temperature working condition of more than 200 ℃ always depends on an inlet for a long time.

When high temperature solid-containing media are transported, solid particles in the media can cause abrasion to the plug.

In the patent numbers filed by the applicant: CN201710801011.3 discloses a three-plunger reciprocating pump, which comprises a pump head body; the valve bank modules are arranged at the end part of the pump head body, and a plurality of valve bodies are arranged in the valve bank modules; and a stuffing box connected with the other end of the pump head body; the pump head body is provided with a liquid inlet main channel and a plurality of liquid inlet branch channels communicated with the liquid inlet main channel, each valve bank module is provided with a valve bank liquid inlet, and the liquid inlet branch channels are communicated with the valve bank liquid inlets in a one-to-one correspondence manner; and one end of the pump head body is also provided with a liquid discharge main channel and a liquid discharge sub-channel communicated with the liquid discharge main channel, each valve bank module is provided with a valve bank liquid discharge port, and the liquid discharge sub-channels are communicated with the valve bank liquid discharge ports in a one-to-one correspondence manner. When the technical scheme is used for conveying the medium containing the solid particles, the solid particles can enter between the plunger and the cylinder sleeve to cause abrasion to the plunger. In view of this, the present application is proposed.

Disclosure of Invention

In order to solve the technical problem of at least one aspect in the background art, the invention provides a reciprocating pump capable of backwashing.

The invention provides a reciprocating pump capable of backwashing, which comprises:

the cylinder sleeve is provided with a connecting channel;

the pump head is connected with the cylinder sleeve, a medium cavity is formed in the pump head, and the medium cavity is communicated with the cylinder sleeve;

the inlet one-way valve and the outlet one-way valve are both communicated with the medium cavity;

the plunger is movably arranged in the cylinder sleeve, a first gap is formed between the plunger and the cylinder sleeve, and the first gap is communicated with the medium cavity and the connecting channel;

a first seal between the plunger and the cylinder casing and on a side of the first gap remote from the pump head;

and the power part is in transmission connection with the plunger.

The reciprocating pump also comprises a flushing ring which is positioned in the cylinder sleeve and is communicated with the connecting channel; wherein the plunger is located within the flush ring and is movable relative to the flush ring.

A first liquid inlet hole is formed in the outer wall of the flushing ring and communicated with the connecting channel; the flushing ring is internally provided with a first connecting hole, the inner wall of the flushing ring is provided with a first liquid outlet groove, the first liquid outlet groove is annular and surrounds the plunger piston, and the first liquid outlet groove is communicated with the first liquid inlet hole through the first connecting hole.

The reciprocating pump also comprises a second sealing element, and the second sealing element is positioned between the cylinder sleeve and the plunger and positioned on one side of the first sealing element far away from the first gap;

a second gap is formed between the plunger and the cylinder sleeve, and the second gap is positioned between the first sealing element and the second sealing element;

the reciprocating pump further comprises an oil inlet pipe and an oil outlet pipe, and the oil inlet pipe and the oil outlet pipe are communicated with the second gap.

The reciprocating pump further comprises a third seal positioned between the cylinder casing and the plunger and on a side of the second seal remote from the first seal;

and a drain hole is formed in the bottom of the cylinder sleeve and is positioned between the second sealing element and the third sealing element, and the drain hole penetrates through the outer wall and the inner wall of the cylinder sleeve.

The reciprocating pump also comprises a draining part, the draining part is annular and is positioned between the cylinder sleeve and the plunger and between the second sealing element and the third sealing element, and an annular second liquid outlet groove is formed in the inner wall of the draining part; the discharging piece is provided with a second connecting hole, and the second connecting hole is connected with the second liquid outlet groove and communicated with the discharging hole.

The reciprocating pump comprises a case, and the case is connected with one end, far away from the pump head, of the cylinder sleeve; wherein the drain hole is located in the case.

Reciprocating pump still includes the cooling body, the cooling body is made by the heat conduction material, the cooling body is installed on the cylinder liner, and is located quick-witted case with between the pump head, the internal first cooling passageway that is equipped with of cooling.

And a second cooling channel is arranged in the pump head.

A multi-plunger reciprocating device comprises

A motor assembly;

a plurality of said reciprocating pumps, wherein said power section is drivingly connected to said motor assembly, and wherein adjacent said pump heads have a gap therebetween.

The beneficial effects brought by one aspect of the invention are as follows:

the liquid inlet pipe can be communicated with the connecting channel. In the imbibition process, let in the material in to first gap through the feed liquor pipe to prevent the medium of medium intracavity to get into first gap, and then avoid the solid particle in the medium to damage the plunger.

The material can be a substance compatible with the medium, and the medium for removing solid particles through filtration can also be used without influencing the medium transportation.

Drawings

FIG. 1 is a cross-sectional view of a disclosed embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of a plunger, pump head, etc. of embodiment 1 of the disclosure;

FIG. 3 is a cross-sectional view of a plunger, pump head, etc. of embodiment 1 of the disclosure;

FIG. 4 is a cross-sectional view of a plunger, pump head, etc. of embodiment 1 of the disclosure;

FIG. 5 is a sectional view of a partial region of the flush ring of embodiment 1 of the disclosed invention;

FIG. 6 is a sectional view of a drain hole and the like of embodiment 1 of the present disclosure;

FIG. 7 is a schematic illustration of embodiment 2 of the present disclosure;

fig. 8 shows a conventional three-plunger reciprocating pump.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in the present application may be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Embodiment 1, referring to fig. 1 to 6, the present invention provides a reciprocating pump capable of backwashing, which is a single-cylinder pump, including: cylinder liner 1, pump head 2, import check valve 3, export check valve 4, plunger 5, first sealing member 6, power portion 7. The power unit 7 in the present embodiment may be a crank mechanism or the like.

A connecting channel 101 is arranged on the cylinder sleeve 1; the pump head 2 is connected with the cylinder sleeve 1, a medium cavity 201 is arranged in the pump head 2, and the medium cavity 201 is communicated with the cylinder sleeve 1; the inlet check valve 3 and the outlet check valve 4 are both communicated with the medium cavity 201.

The plunger piston 5 is movably arranged in the cylinder sleeve 1, a first gap is formed between the plunger piston 5 and the cylinder sleeve 1, and the first gap is communicated with the medium cavity 201 and the connecting channel 101.

The first sealing element 6 is positioned between the plunger 5 and the cylinder sleeve 1 and on the side of the first gap away from the pump head 2; the power part 7 is in transmission connection with the plunger 5.

The power unit 7 drives the plunger 5 to reciprocate, and the medium is transported through the medium chamber 201.

Referring to fig. 1, when the plunger 5 moves to the left, the pressure in the medium chamber 201 decreases, and the external medium enters the medium chamber 201 through the inlet check valve 3, thereby completing the liquid suction process.

When the plunger 5 moves rightwards, the pressure of the medium cavity 201 increases, the outlet one-way valve 4 is opened, and the medium in the medium cavity 201 is discharged, so that the liquid discharging process is realized.

The medium is conveyed along with the continuous reciprocating movement of the reciprocating pump.

During the transport of the medium containing solid particles, the solid particles can enter between the plunger 5 and the cylinder liner 1 into the first gap. If not effectively handled, wear may be caused to the plunger 5.

When the technical scheme of this embodiment is implemented, liquid inlet pipe a can be utilized to communicate with connecting channel 101. At the imbibition in-process, let in the material in to first gap through feed liquor pipe A to prevent the medium entering first gap in the medium chamber 201, and then avoid the solid particle in the medium to damage plunger 5.

The material can be a substance compatible with the medium, and can also utilize the medium for removing solid particles through filtration, thereby having no influence on the medium transportation.

In this embodiment, the reciprocating pump further includes a flushing ring 8, and the flushing ring 8 is located in the cylinder liner 1 and is communicated with the connecting channel 101; wherein the plunger 5 is located within the flush ring 8 and is movable relative to the flush ring 8.

A first liquid inlet hole 801 is formed in the outer wall of the flushing ring 8, and the first liquid inlet hole 801 is communicated with the connecting channel 101; wash and be equipped with first connecting hole 802 in the ring 8, be equipped with first play liquid groove 803 on the inner wall of ring 8 washes, first play liquid groove 803 is cyclic annular, encircles plunger 5 arranges, first play liquid groove 803 through first connecting hole 802 with first feed liquor hole 801 intercommunication.

The plunger 5 is columnar, and the first slit is annular.

Through setting up and washing ring 8, external material gets into first feed liquor hole 801 through connecting channel 101, in having first connecting hole 802, first play liquid groove 803 to get into first gap, the effectual medium that prevents medium chamber 201 gets into first gap, effectively avoids causing the damage to plunger 5.

The first liquid outlet groove 803 is annularly arranged, so that external materials can be quickly and fully filled in the first gap, the medium is prevented from entering, and the plunger 5 is prevented from being damaged.

In this embodiment, the reciprocating pump further comprises a second sealing member 9, and the second sealing member 9 is located between the cylinder liner 1 and the plunger 5 and on a side of the first sealing member 6 away from the first gap.

A second gap is formed between the plunger 5 and the cylinder liner 1, and the second gap is positioned between the first sealing element 6 and the second sealing element.

The reciprocating pump further comprises an oil inlet pipe 10 and an oil outlet pipe 11, and the oil inlet pipe 10 and the oil outlet pipe 11 are communicated with the second gap.

With reference to fig. 3, when the device is applied to a boiling bed residue hydrogenation device in the refining industry, the temperature of the conveyed medium is higher. Resulting in a higher temperature of the plunger 5.

The oil inlet pipe 10 is used for introducing hydraulic oil, the hydraulic oil enters the second gap, and then the hydraulic oil is discharged through the oil outlet pipe 11.

The hydraulic oil can flush, cool, lubricate the plunger 5, carry away solid particles entering the second slit, and the like.

In this embodiment, the reciprocating pump further comprises a third sealing element 12, wherein the third sealing element 12 is positioned between the cylinder sleeve 1 and the plunger 5 and on the side of the second sealing element 9 away from the first sealing element 6.

The bottom of the cylinder liner 1 is provided with a drain hole 102, the drain hole 102 is located between the second sealing element and the third sealing element 12, and the drain hole 102 penetrates through the outer wall and the inner wall of the cylinder liner 1. The hydraulic oil between the plunger 5 and the cylinder liner 1 can be discharged through the drain hole 102. The first seal 6, the second seal 9 and the third seal 12 may be packing.

In this embodiment, the reciprocating pump further includes a drainage member 13, the drainage member 13 is annular, and is located between the cylinder liner 1 and the plunger 5, and is located between the second sealing member and the third sealing member 12, and an annular second liquid outlet groove 131 is formed on an inner wall of the drainage member 13; the discharging member 13 is provided with a second connecting hole 132, and the second connecting hole 132 is connected to the second liquid outlet groove 131 and is communicated with the discharging hole 102. The hydraulic oil between the plunger 5 and the cylinder liner 1 can be discharged through the second outlet groove 131, the second connecting hole 132 and the drain hole 102.

In this embodiment, the reciprocating pump includes a case 14, and the case 14 is connected to one end of the cylinder sleeve 1 away from the pump head 2; wherein the drain hole 102 is located within the chassis 14.

The hydraulic oil in the area between the cylinder sleeve 1, the plunger 5, the second sealing element and the third sealing element 12 can enter the case 14 through the second liquid outlet groove 131, the second connecting hole 132 and the drain hole 102.

In this embodiment, the reciprocating pump further includes a cooling body 15, the cooling body 15 is made of a heat conducting material, the cooling body 15 is installed on the cylinder sleeve 1 and located between the case 14 and the pump head 2, and a first cooling channel 151 is provided in the cooling body 15. When high-temperature media are conveyed, low-temperature fluid, such as water, can be introduced into the first cooling channel 151 to cool the cylinder liner 1. Reducing the impact on the plunger 5, the first seal 6, the second seal, the third seal 12, etc.

The cooling body 15 is located between the cabinet 14 and the pump head 2 to separate the cabinet 14 from the pump head 2, so as to avoid the influence of high temperature on the cabinet 14.

A second cooling channel 202 is arranged in the pump head 2. The second cooling channel 202 may be filled with a low temperature fluid, such as water, to cool the pump head 2.

Embodiment 2, with reference to fig. 7, further discloses a multi-plunger 5 reciprocating device, which may be a three-plunger 5 reciprocating pump, comprising a

motor assembly

16 and 3 reciprocating pumps of embodiment 1, wherein the power part 7 is in transmission connection with the motor assembly 16, and a gap is formed between adjacent pump heads 2.

Three plungers 5 can be operated by means of one motor assembly 16. This three plunger 5 reciprocating pump can effectively avoid solid particle to cause the wearing and tearing to plunger 5.

When a high-temperature medium is conveyed, the pump head 2 expands at a high temperature.

Fig. 8 shows the prior art, in which three pump heads 2 are integrated and interact with each other during expansion, which is severe and affects the medium transport.

Also for example in application No.: 201710399232.2, this prior art describes: three pump head interfaces are fixed on three surfaces of the transition plate with the U-shaped surface. The three pump heads are integrally connected, and influence each other when expanding, and the expansion is serious, and influences medium conveying.

In this embodiment, there is a clearance between the pump head 2, split type structure, and the respective inflation in-process of pump head 2 does not influence each other.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. A back-flushable reciprocating pump, comprising:

the cylinder sleeve is provided with a connecting channel;

a first seal between the plunger and the cylinder sleeve and on a side of the first slit remote from the pump head;

and the power part is in transmission connection with the plunger.

2. The backwash able reciprocating pump of claim 1, further comprising a flushing ring located within the cylinder casing and in communication with the connecting passage; wherein the plunger is located within the flush ring and is movable relative to the flush ring.

3. The reciprocating pump capable of backwashing as claimed in claim 2, wherein a first liquid inlet hole is formed in an outer wall of the flushing ring, and the first liquid inlet hole is communicated with the connecting channel; the flushing ring is internally provided with a first connecting hole, the inner wall of the flushing ring is provided with a first liquid outlet groove, the first liquid outlet groove is annular and is arranged around the plunger, and the first liquid outlet groove is communicated with the first liquid inlet hole through the first connecting hole.

4. The backflushable reciprocating pump of claim 1, further comprising a second seal between the cylinder liner and the plunger on a side of the first seal away from the first gap;

5. The backflushable reciprocating pump of claim 4, further comprising a third seal between the cylinder liner and the plunger on a side of the second seal away from the first seal;

6. The backwash-capable reciprocating pump of claim 5, further comprising a drain member having an annular shape and located between the cylinder liner and the plunger and between the second seal member and the third seal member, wherein an annular second liquid outlet groove is formed in an inner wall of the drain member; the discharging piece is provided with a second connecting hole, and the second connecting hole is connected with the second liquid outlet groove and communicated with the discharging hole.

7. The backwash-capable reciprocating pump of claim 5, wherein the reciprocating pump comprises a housing connected to an end of the cylinder liner remote from the pump head; wherein the drain hole is located in the case.

8. The backwash reciprocating pump as defined in claim 7, further comprising a cooling body made of a heat conducting material, said cooling body being mounted on the cylinder casing and located between said housing and said pump head, said cooling body having a first cooling channel therein.

9. The backflushable reciprocating pump of claim 1, wherein a second temperature reducing passage is provided in the pump head.

10. A multiple plunger reciprocating device, comprising:

a motor assembly;

a plurality of reciprocating pumps as defined in any one of claims 1 to 9 wherein said power section is drivingly connected to said motor assembly, and wherein adjacent said pump heads have a gap therebetween.