CN113530808B

CN113530808B - Plunger type reciprocating pump with anti-leakage sealing structure

Info

Publication number: CN113530808B
Application number: CN202110998219.5A
Authority: CN
Inventors: 严东楠; 童玥雯; 祝雪金; 周森
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-04-07
Anticipated expiration: 2041-08-27
Also published as: CN113530808A

Abstract

The invention relates to a plunger type reciprocating pump with a leakage-proof sealing structure, which comprises: pump body, reciprocating column and piston block. The reciprocating column is arranged at the pump body in a matching way. The piston block is fixedly connected to the reciprocating column. A plunger-type reciprocating pump of leak-proof seal structure further comprising: an automatic sealing mechanism. The automatic sealing mechanism includes: the device comprises a stepping electric telescopic rod, an air pump, an annular groove, a liquid induction switch and a linkage sealing mechanism. Linkage sealing mechanism includes: a connecting cylinder, an annular rubber air bag, a one-way air valve, an air duct, a convex pressing block, an elastic rubber sheet and a pressure sensing switch. The invention has the advantages of facilitating automatic repair of the sealing element at the piston block, avoiding shutdown maintenance of the pump body and improving efficiency.

Description

Plunger type reciprocating pump with anti-leakage sealing structure

Technical Field

The invention relates to the technical field of plunger type reciprocating pumps, in particular to a plunger type reciprocating pump with a leakage-proof sealing structure.

Background

The plunger type reciprocating pump is a pump body which acts on the transmitted liquid by means of reciprocating motion of a piston column arranged inside. In general, a sealing member is disposed between the end of a piston column and the inner wall of a pump body in a plunger type reciprocating pump, so as to prevent liquid from passing through the position of the piston column. And the sealing member of the interior of the general pump body is a rubber member, and is easy to damage along with the reciprocating motion of the piston column for a long time, thereby causing leakage. After general leakage, a worker is required to stop the pump body, then the pump body is disassembled and opened, the sealing element is manually overhauled, and the efficiency is low.

Disclosure of Invention

The present invention is directed to a plunger type reciprocating pump with a leak-proof sealing structure to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a plunger-type reciprocating pump of leak-proof sealing structure, comprising: pump body, reciprocating column and piston piece. The reciprocating column is arranged at the pump body in a matching way. The piston block is fixedly connected to the reciprocating column. A plunger-type reciprocating pump of leak-proof seal structure further comprising: an automatic sealing mechanism.

The automatic sealing mechanism includes: the device comprises a stepping electric telescopic rod, an air pump, an annular groove, a liquid induction switch and a linkage sealing mechanism. The stepping electric telescopic rod is vertically and fixedly connected to the piston block. The air pump is fixedly connected to the piston block. The annular groove is formed in the piston block. The liquid inductive switch is connected to the piston block and is electrically connected with the stepping electric telescopic rod. Linkage sealing mechanism includes: a connecting cylinder, an annular rubber air bag, a one-way air valve, an air duct, a convex pressing block, an elastic rubber sheet and a pressure sensing switch. The connecting cylinder is inserted in the annular groove and fixedly connected with the telescopic end of the stepping electric telescopic rod. The annular rubber air bag is connected to the connecting cylinder in a surrounding mode. The inner side of the connecting cylinder is a cavity. The air duct is inserted in the connecting cylinder in a sliding manner, and the tail end of the air duct is connected to the air pump. The one-way air valve is installed to the connecting cylinder and communicated with the annular rubber air bag. The upper end of the air duct is an opening for butting the one-way air valve. The convex pressing block is fixedly connected to the stepping electric telescopic rod. The elastic rubber sheet is connected to the piston block. The pressure sensitive switch is mounted to the elastic rubber sheet, and the pressure sensitive switch is electrically connected to the air pump.

As a further scheme of the invention: a plunger-type reciprocating pump of leak-proof seal structure further comprising: an alarm for signaling a leak. The alarm is electrically connected with the liquid induction switch.

As a further scheme of the invention: the automatic sealing mechanism further comprises: a limiting extrusion cylinder for extruding the annular rubber air bag. The limiting extrusion container is fixedly connected to the annular groove.

As a further scheme of the invention: a plunger-type reciprocating pump of leak-proof seal structure further comprising: a drainage mechanism. The drainage mechanism includes: drain pipe, closing block, sliding cavity, coupling spring and link gear. The drain pipe is connected to the pump body. The sealing block is vertically inserted between the water drain pipe and the pump body. The sliding cavity is arranged in the pump body. The connecting spring is vertically connected between the sliding cavity and the closing block. The link gear includes: convex connecting block, connecting rod, slip dog, reset spring, kicking block and linkage piece. The convex connecting block is horizontally and fixedly connected to the sealing block. The connecting rod is vertically connected to the convex connecting block. The sliding block is horizontally inserted in the connecting rod in a sliding way. The end of the sliding block close to the inner wall of the pump body is a smooth cambered end. The top block is vertically connected to the piston block. The return spring is horizontally connected between the sliding block and the connecting rod. The linkage block is horizontally connected to the connecting cylinder.

As a further scheme of the invention: the linkage block is an elastic rubber block.

As a further scheme of the invention: the drainage mechanism still includes: a cone annular guide plate for guiding leakage water. The cone annular guide plate is connected to the pump body in a surrounding mode.

As a further scheme of the invention: the drainage mechanism still includes: the lid can be dismantled. The detachable cover body is installed to the position of the sliding cavity.

As a further scheme of the invention: the inner wall of the sliding cavity is coated with a smoothing agent for reducing friction force.

As a further scheme of the invention: the sealing block is mutually attached to the sliding cavity.

As a further scheme of the invention: the closed block is a square block body, and the cross section of the drain pipe is a square surface.

Compared with the prior art, the invention has the beneficial effects that: the sealing member of convenient automatic repair piston piece department avoids the pump body to shut down and overhauls, raises the efficiency.

When detecting that the seepage appears in piston piece sealing member department, just rely on the multiunit annular rubber gasbag inflation that distributes, replace to damaged annular rubber gasbag position, realize self-sealing, need not the manual work and overhaul.

Simultaneously, the leaked water is conveniently discharged, and the leaked water in the pump body does not need to be manually cleaned.

Under the combined action of the electric telescopic rod and the linkage mechanism which operate in the automatic repairing process, the sealing block at the position of the drain pipe is automatically lifted, water at the bottom in the pump body is drained, and manual disassembly of the pump body for draining water is avoided.

Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a plunger type reciprocating pump of a leak-proof sealing structure of the present invention.

Fig. 2 is an enlarged structural view at a in fig. 1.

Fig. 3 is a structural view showing the fitting connection of the slide stopper, the closing block, the top block and the interlocking block of the plunger type reciprocating pump of the leakage-proof sealing structure in fig. 2.

Fig. 4 is a partial structural view of the fitting connection of the connecting cylinder, the annular rubber bladder and the air duct of the plunger-type reciprocating pump of fig. 2 in a leak-proof sealing structure.

Fig. 5 is a top view structural view of the fitting connection of the connecting cylinder of the plunger type reciprocating pump of the leak-proof sealing structure of fig. 4 with the annular rubber bladder.

List of reference numerals: a plunger-type reciprocating pump 100 of a leak-proof seal structure; a pump body 10; a reciprocating column 20; a piston block 30; an automatic sealing mechanism 40; a step-by-step electric telescopic rod 41; an air pump 42; an annular groove 43; a liquid sensing switch 44; a linkage sealing mechanism 45; a connecting cylinder 451; an annular rubber bladder 452; a one-way air valve 453; an airway tube 454; a convex pressing block 455; an elastic rubber sheet 456; a limiting extrusion container 46; a drainage mechanism 50; a drain pipe 51; a closing block 52; a slide chamber 53; a connecting spring 54; a link mechanism 55; a male connection block 551; a connecting rod 552; a slide stopper 553; a return spring 554; a top block 555; a linkage block 556; a cone annular guide plate 56; a detachable cover 57.

Detailed Description

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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1 to 5, in an embodiment of the present invention, a plunger type reciprocating pump 100 of a leak-proof sealing structure includes: a pump body 10, a reciprocating cylinder 20 and a piston block 30. The reciprocating column 20 is vertically disposed at the inner bottom of the pump body 10. The piston block 30 is fixedly connected to the upper end of the reciprocating column 20, and the outer wall of the piston block 30 and the inner wall of the pump body 10 are attached to each other. The upper end of the pump body 10 is provided with a water inlet end and a water outlet end, namely, the water inlet end is used for water inlet and the water outlet end is used for water discharge when the reciprocating column 20 drives the piston block 30 to ascend and descend. A plunger type reciprocating pump 100 of a leak-proof seal structure further comprises: an automatic sealing mechanism 40.

The automatic sealing mechanism 40 includes: the device comprises a stepping electric telescopic rod 41, an air pump 42, an annular groove 43, a liquid induction switch 44 and a linkage sealing mechanism 45. The left and right stepping electric telescopic rods 41 are vertically and fixedly connected to the left and right sides of the lower end of the piston block 30 in pairs. The air pumps 42 are fixedly connected to the left and right sides of the lower end of the piston block 30 in pairs. An annular groove 43 opens at the lower outer wall of the piston block 30. A liquid sensing switch 44 is connected to the bottom of the piston block 30, and the liquid sensing switch 44 is electrically connected to the step electric telescopic rod 41. The linkage sealing mechanism 45 includes: a connecting cylinder 451, a ring-shaped rubber air bag 452, a one-way air valve 453, an air duct 454, a convex pressing block 455, an elastic rubber sheet 456 and a pressure sensing switch. The connection cylinder 451 is inserted inside the annular groove 43, and the connection cylinder 451 is fixedly connected to the telescopic end of the stepping type electric telescopic bar 41. The annular rubber bladder 452 is circumferentially connected inside and outside the connecting cylinder 451, and the annular rubber bladder 452 is equidistantly distributed along the connecting cylinder 451 from top to bottom. The inside of the connecting cylinder 451 is a cavity. The air guide tube 454 is slidably inserted inside the connection barrel 451, and the end of the air guide tube 454 is connected to the air outlet end of the air pump 42. The one-way air valve 453 is attached to the inside of the connecting tube 451, the one-way air valve 453 is communicated with the annular rubber bladder 452, and the air flow of the one-way air valve 453 is from the outside to the inside of the annular rubber bladder 452. Both sides of the upper end of the air duct 454 are openings for abutting against the one-way air valve 453. The protruding pressing block 455 is fixedly connected to the telescopic end of the step-type electric telescopic rod 41. The elastic rubber sheet 456 is attached to the lower end of the piston block 30 at an equal distance from the top to the bottom, and the elastic rubber sheet 456 is located above the position of the presser bar 455. A pressure sensing switch is mounted to the lower side of the elastic rubber sheet 456, and the pressure sensing switch is electrically connected to the air pump 42.

In the initial state, the inner and outer annular rubber bladders 452 at the uppermost end of the connecting cylinder 451 are in the expanded state and abut against the inner wall of the pump body 10 and the inner wall of the annular groove 43, so as to ensure that the piston block 30 keeps a sealing butt joint when moving up and down in the pump body 10, and prevent water conveyed in the pump body 10 from passing through the position of the piston block 30. When the uppermost annular rubber bladder 452 is worn and leaks air due to long-term reciprocation, water leaks downward from the edge of the piston block 10. When the piston block 30 descends to the bottom, the liquid sensing switch 44 contacts the bottom inside the pump body 10, contacts the leaked water, and then senses. The liquid sensing switch 44 generates a sensing signal to cause the step-type electric telescopic rod 41 to perform a retracting movement. The connecting barrel 451 moves upwardly a section within the annular groove 43. In the process, the air duct 454 and the inner cavity of the connecting cylinder 451 move relatively, and the upper port of the air duct 454 is in butt joint communication with the one-way air valve 453 at the second group of annular rubber air bags 452. Meanwhile, when the stepping electric telescopic rod 41 is retracted, the stepping electric telescopic rod 41 drives the protruding pressing block 455 to rise and abut against the pressure sensing switch on the elastic rubber sheet 456 at the corresponding position, the pressure sensing switch enables the air pump 42 to operate, and the air guide tube 454 inflates the currently abutted annular rubber air bag 452, so that the annular rubber air bag is expanded and abuts against the inner wall of the pump body 10 to seal. Because the plurality of groups of annular rubber air bags 452 are distributed, the automatic sealing treatment can be conveniently carried out for a plurality of times.

A plunger-type reciprocating pump 100 of a leak-proof seal structure further comprises: an alarm for signaling a leak. The alarm is electrically connected with the liquid induction switch 44, and when the liquid induction switch 44 detects that water leaks from the inside, the alarm is triggered, so that the corresponding staff can conveniently know the water leakage and check the water leakage.

The automatic sealing mechanism 40 further includes: and a limiting extrusion cylinder 46 for extruding the annular rubber air bag 452. A restraining container 46 is fixedly attached to the inner top of the annular recess 43 and the restraining container 46 is aligned with the annular rubber bladder 452 in the outboard position. When the annular rubber air bag 452 at the uppermost position is damaged and cannot be sealed, and when the connecting barrel 451 rises, the annular rubber air bag 452 damaged at the outer side collides with the lower side of the limiting extrusion barrel 46, is flattened due to extrusion, and is transversely propped open when being flattened, so that the annular rubber air bag conveniently collides with the inner wall of the pump body 10, and the sealing and repairing effects are further enhanced.

A plunger-type reciprocating pump 100 of a leak-proof seal structure further comprises: a drainage mechanism 50. The drainage mechanism 50 includes: drain 51, closing block 52, slide chamber 53, connecting spring 54 and linkage 55. A drain pipe 51 is connected to the bottom of the pump body 10. A closing block 52 is vertically inserted at the connection port between the water discharge pipe 51 and the pump body 10. The slide chamber 53 is opened in the side wall of the pump body 10, and the upper end of the closing block 52 is vertically slidably inserted inside the slide chamber 53. A connecting spring 54 is vertically connected between the slide chamber 53 and the upper end of the closing block 52. The link mechanism 55 includes: male connecting block 551, connecting rod 552, slide stop 553, return spring 554, top block 555, and linkage block 556. The convex connecting block 551 is horizontally and fixedly connected to the closing block 52. The connecting rod 552 is vertically connected to the upper side of the male connecting block 551. A slide stopper 553 is horizontally slidably inserted at the upper end of the connecting rod 552. The end of the slide stop 553 adjacent the inner wall of the pump body 10 is smooth arcuate. A top block 555 is vertically connected to the underside of the plunger block 10, and the top block 555 is aligned on the smooth arc end upper side of the slide stop 553. A return spring 554 is horizontally connected between the slide stopper 553 and the connecting rod 552. The linkage block 556 is horizontally connected to the lower side of the connection barrel 451. And the linkage blocks 556 are equidistantly distributed from top to bottom.

The sealing block 52 is used to seal the end of the drain pipe 51 to prevent the leakage water from flowing away directly and failing to make the liquid sensing switch 44. Whenever the piston block 30 descends to the bottom of the pump body 10, the initial position of the slide block 553 is staggered from the lateral position of the link block 556, so that the link block 556 is conveniently descended to a lower side lower than the slide block 553. When the linkage block 556 descends to the underside of the slide stop 553, the top block 555 presses against the smooth arcuate end of the slide stop 553 as the plunger block 30 descends, causing the slide stop 553 to slide laterally directly over the linkage block 556. At this time, if the stepping type electric telescopic rod 41 is triggered to contract due to leakage, the linkage block 556 at the corresponding position is lifted along with the leakage, and collides against the sliding stopper 553. The sliding block 553 drives the closing block 52 to slide and rise through the connecting rod 552, so that the port of the water discharge pipe 51 is opened, and the leaked water is conveniently discharged.

The linkage block 556 is an elastic rubber block. The extrusion deformation is facilitated through the position of the slide block 553 when it is necessary to disengage the slide block 553, thereby facilitating the reset of the slide block 553.

The drainage mechanism 50 further includes: a cone ring guide 56 for guiding leakage water. A cone-shaped annular guide plate 56 is attached around the inner bottom of the pump body 10, the cone-shaped annular guide plate 56 facilitating guiding leakage water to the drain pipe 51.

The drainage mechanism 50 further includes: a detachable cover 57. A removable cover 57 is mounted to slide chamber 53. The removable cover 57 is conveniently removed, the slide chamber 53 opened, and the closure block 52 then serviced.

The inner wall of the sliding cavity 53 is coated with a smoothing agent for reducing friction force, so that the sealing block 52 can conveniently slide up and down.

The closing block 52 and the slide chamber 53 are attached to each other.

The closing block 52 is a square block body, and the cross section of the water discharge pipe 51 is a square face, which are fitted to each other.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. A plunger-type reciprocating pump of leak-proof sealing structure, comprising: a pump body, a reciprocating column and a piston block; the reciprocating column is arranged at the pump body in a matching way; the piston block is fixedly connected to the reciprocating column; characterized in that, the plunger type reciprocating pump of the leak-proof sealing structure further comprises: an automatic sealing mechanism;

the automatic sealing mechanism includes: the stepping type electric telescopic rod, the air pump, the annular groove, the liquid induction switch and the linkage sealing mechanism are arranged in the groove; the stepping electric telescopic rod is vertically and fixedly connected to the piston block; the air pump is fixedly connected to the piston block; the annular groove is formed in the piston block; the liquid induction switch is connected to the piston block and is electrically connected with the stepping type electric telescopic rod; the linkage sealing mechanism comprises: the connecting cylinder, the annular rubber air bag, the one-way air valve, the air guide pipe, the convex pressing block, the elastic rubber sheet and the pressure sensing switch; the connecting cylinder is inserted into the annular groove and is fixedly connected with the telescopic end of the stepping electric telescopic rod; the annular rubber air bag is connected to the connecting cylinder in a surrounding manner; the inner side of the connecting cylinder is a cavity; the air guide pipe is inserted in the connecting cylinder in a sliding mode, and the tail end of the air guide pipe is connected to the air pump; the one-way air valve is mounted to the connecting cylinder and is communicated with the annular rubber air bag; the upper end of the air duct is provided with an opening for butting the one-way air valve; the convex pressing block is fixedly connected to the stepping electric telescopic rod; the elastic rubber sheet is connected to the piston block; the pressure sensing switch is mounted to the elastic rubber sheet and is electrically connected with the air pump;

the plunger-type reciprocating pump of a leak-proof seal structure further comprises: an alarm for signaling a leak; the alarm is electrically connected with the liquid induction switch;

the automatic sealing mechanism further comprises: the limiting extrusion cylinder is used for extruding the annular rubber air bag; the limiting extrusion container is fixedly connected to the annular groove.

2. A plunger-type reciprocating pump of a leak-proof sealing structure as set forth in claim 1,

the plunger-type reciprocating pump of the leak-proof sealing structure further comprises: a drainage mechanism; the drainage mechanism includes: the device comprises a water drainage pipe, a sealing block, a sliding cavity, a connecting spring and a linkage mechanism; the drain pipe is connected to the pump body; the sealing block is vertically inserted between the drain pipe and the pump body; the sliding cavity is arranged in the pump body; the connecting spring is vertically connected between the sliding cavity and the sealing block; the link gear includes: the device comprises a convex connecting block, a connecting rod, a sliding stop block, a return spring, a top block and a linkage block; the convex connecting block is horizontally and fixedly connected to the sealing block; the connecting rod is vertically connected to the convex connecting block; the sliding stop block is horizontally inserted in the connecting rod in a sliding mode; the end of the sliding stop block close to the inner wall of the pump body is a smooth cambered end; the top block is vertically connected to the piston block; the return spring is horizontally connected between the sliding stop block and the connecting rod; the linkage block is horizontally connected to the connecting cylinder.

3. A plunger-type reciprocating pump of a leak-proof sealing structure as set forth in claim 2,

the linkage block is an elastic rubber block.

4. A plunger-type reciprocating pump of a leak-proof seal structure, as defined in claim 3,

the drainage mechanism further comprises: a cone annular guide plate for guiding leakage water; the cone annular guide plate is connected to the pump body in a surrounding mode.

5. A plunger-type reciprocating pump of a leak-proof seal structure, as defined in claim 4,

the drainage mechanism further comprises: a detachable cover body; the detachable cover body is installed to the position of the sliding cavity.

6. A plunger-type reciprocating pump of a leak-proof sealing structure as set forth in claim 5,

and the inner wall of the sliding cavity is coated with a smoothing agent for reducing friction force.

7. A plunger-type reciprocating pump of a leak-proof seal structure, as defined in claim 6,

the sealing block is attached to the sliding cavity.

8. A plunger-type reciprocating pump of a leak-proof sealing structure as set forth in claim 7,

the sealing block is a square block body, and the cross section of the drain pipe is a square surface.