CN217783733U - Anti-leakage structure for diaphragm pump - Google Patents

Abstract

The utility model discloses a prevent leaking structure for diaphragm pump, this structure is concentrated in the upper cover discharge tube of diaphragm pump, compact structure. The structure comprises a pump body upper cover, a spring, a sealing plug, a sealing ring and a pressing plate. Utilize the cambered surface of sealing plug and the cooperation of the arc seat of clamp plate during the equipment, sealed effectual, the shape characteristic of this structure still can effectively correct the small deformation of parts such as spring, clamp plate cambered surface in the equipment moreover, along with the effective running-in of product use, sealed function can further promote. During the equipment, the pressure plate is pressed on the strengthening rib of pump body function piece valve block, can effectively fix the valve block, further simplifies product structure.

Description

Anti-leakage structure for diaphragm pump

Technical Field

The utility model relates to a diaphragm pump technical field, more specifically say, relate to a prevent leaking structure for diaphragm pump.

Background

The diaphragm pump is a product which converts electric energy into kinetic energy by means of an eccentric link mechanism and by utilizing the regular peristalsis of the diaphragm, and comprises an air pump, a water pump and a water-air dual-purpose pump from the aspect of contacting media. How to classify is again determined primarily by the specific use of the user. The pump body is provided with an inlet port and an outlet port, and when the pump works, a medium is sucked from the feed port and then pushed out from the discharge port. According to the specific use of a user, when the feed inlet is used, the feed inlet is reserved (used as a negative pressure pump at the moment), and the discharge outlet can be hidden; otherwise, the discharge hole is reserved, and the feed inlet is hidden.

When the diaphragm water pump is used by a user, a certain height difference is generated between a water inlet and a water outlet of the water pump due to the structure of a user product, and residual water in the pump and liquid in a water tank connected with the water inlet flow out from the water outlet under the pressure action after the pump stops working under the action of the pressure difference, so that the use of the user product is influenced. Similarly, similar air leakage occurs during use of the diaphragm air pump.

In order to prevent the medium leakage phenomenon from appearing in the diaphragm pump, generally can set up seal assembly in pump body discharge gate department, current seal assembly includes sealing plug and clamp plate, and sealing plug and clamp plate are the plane contact usually, and the leakproofness is relatively poor to it is relatively poor to make to prevent leaking the effect, and can't carry out the adaptability cooperation between sealing plug and the clamp plate, and the assembly precision requires highly, and the assembly degree of difficulty is big.

The above disadvantages need to be improved.

Disclosure of Invention

In order to overcome the not enough of current technique, the utility model provides a prevent leaking structure for diaphragm pump has solved seal assembly and can't carry out the adaptability cooperation, and the assembly required precision is high, the big problem of the assembly degree of difficulty.

The utility model discloses technical scheme as follows:

the utility model provides a prevent leaking structure for diaphragm pump, the diaphragm pump includes the pump body and upper cover, be provided with the discharging pipe on the upper cover, be provided with seal assembly in the discharging pipe, seal assembly includes: the discharge pipe sealing device comprises a pressing plate, a sealing plug and a spring, wherein the pressing plate is positioned at the bottom of the discharge pipe, the bottom of the sealing plug is an arc surface, and the arc surface is in sealing contact with the top of the pressing plate; the spring is used for abutting the sealing plug on the pressure plate.

Further, the top of the pressing plate is provided with an arc-shaped seat, and the arc-shaped seat is attached to the arc surface.

Furthermore, the bottom of the pressing plate is in interference fit with the inner wall of the discharge pipe, so that the pressing plate is tightly connected with the upper cover.

Furthermore, the clamp plate outside is equipped with the annular, be equipped with the sealing washer in the annular, the clamp plate passes through the sealing washer with discharging pipe sealing connection.

Furthermore, a positioning column is arranged at the top of the sealing plug, and the spring is sleeved outside the positioning column.

Furthermore, the bottom of the spring is in an inverted cone shape, and the inner diameter of the spring at the lower end of the cone shape is smaller, so that the spring can be tightly fixed on the positioning column.

Furthermore, a first limiting shoulder is arranged in the discharge pipe and used for limiting the top of the spring.

Furthermore, a second limiting shoulder is arranged at the bottom of the outer side of the pressing plate and is in contact with the bottom surface of the discharge pipe.

Further, still include the inlet pipe on the upper cover, the length of inlet pipe is less than the length of discharging pipe.

Further, the pump body still includes the valve block, be provided with the strengthening rib on the valve block, the bottom surface of clamp plate with the strengthening rib contact, the clamp plate is used for right the top of valve block is carried on spacingly.

According to the above scheme the utility model discloses, its beneficial effect lies in, the utility model discloses adopt the cambered surface cooperation between sealing plug among the seal assembly and the clamp plate, utilize the cambered surface of sealing member to realize sealed, can effectively correct the part like the deviation that the spring shape is bad, the equipment method is unreasonable etc. causes, the sealing plug can swing the certain limit and keep contacting well with the clamp plate, guarantees sealed effect, effectively improves and prevents leaking the effect.

Just be in the utility model discloses in with seal assembly setting in the discharging pipe, and utilize clamp plate location valve block, make product compact structure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic front view of the present invention in a partial sectional view;

FIG. 3 is an exploded view of the present invention;

fig. 4 is a schematic perspective view of the sealing plug of the present invention;

fig. 5 is a schematic perspective view of the middle press plate of the present invention.

Wherein, in the figures, the respective reference numerals: 1. a pump body; 2. an upper cover; 21. a discharge pipe; 211. a first limit shoulder; 22. a feed pipe; 3. a seal assembly; 31. pressing a plate; 311. an arc-shaped seat; 312. a ring groove; 313. a second limit shoulder; 32. a sealing plug; 321. a cambered surface; 322. a positioning column; 33. a spring; 34. a seal ring; 4. a valve plate; 41. and (5) reinforcing ribs.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "fixed" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of technical features. "poly" means two or more unless explicitly defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

As shown in fig. 1-5, a prevent leaking structure for diaphragm pump, including the pump body 1 and upper cover 2, be provided with discharging pipe 21 on the upper cover 2, be provided with seal assembly 3 in the discharging pipe 21, seal assembly 3 includes: the pressure plate 31 is positioned at the bottom of the discharge pipe 21, the bottom of the sealing plug 32 is an arc surface 321, the top of the pressure plate 31 is provided with an arc seat 311, the arc seat 311 is attached to the arc surface 321, and the arc surface 321 is in sealing contact with the top of the pressure plate 31; the spring 33 serves to urge the sealing plug 32 against the pressure plate 31.

The department of opening and shutting of current seal assembly 3 is for guaranteeing sealed effect, generally can set up seal assembly 3 in pump body discharging pipe 21 department, and current seal assembly 3 includes sealing plug 32 and clamp plate 31, and sealing plug 32 and clamp plate 31 are plane contact usually, and the leakproofness is relatively poor to it is relatively poor to make to prevent leaking the effect, and can't carry out the adaptability cooperation between sealing plug 32 and the clamp plate 31, and the assembly required precision is high, and the assembly degree of difficulty is big.

And in the utility model discloses in, the diaphragm pump is provided with inlet pipe 22 and discharging pipe 21 on the during operation, on 2, from inlet pipe 22 feeding. At the beginning, the spring 33 presses the sealing plug 32 against the pressure plate 31 to keep the sealing contact with the pressure plate and the pressure plate, so that the pipeline of the discharge pipe 21 is closed; the diaphragm pump presses the material into the discharge pipe 21, the pressure at the discharge pipe 21 is increased, the spring 33 is further compressed, when the pressure is greater than the elastic force of the spring 33, the sealing plug 32 is separated from the pressure plate 31, the pipeline of the discharge pipe 21 is opened, and the material in the pump body 1 is discharged from the discharge pipe 21; along with the material discharge, the pressure in the pump body 1 reduces, and spring 33 resets, compresses tightly sealing plug 32 on clamp plate 31 again, keeps the two sealed contact, and discharging pipe 21 pipeline closure prevents to appear leaking.

The utility model discloses adopt the cooperation of cambered surface 321 between sealing plug 32 and the clamp plate 31 in the sealed subassembly 3, compare in plane seal, effectively increase cooperation area, the similar mechanical design of cambered surface 321 cooperation "V" component, the automatic direction function has, can effectively correct the part if spring 33 shape is bad, the deviation that the equipment method is unreasonable etc. caused, sealing plug 32 can swing certain limit and keep contacting well with clamp plate 31, guarantee sealed effect, and sealing plug 32 generally adopts the rubber material preparation, certain deformability has, from can carrying out adaptability deformation when contacting with clamp plate 31, further guarantee good contact between the two, in addition, along with the increase of product live time, 32 and the clamp plate 31 two running-in each other, cambered surface 321 cooperation degree is high, the gas tightness is better and better, prevent leaking the effect and better, set up sealing plug 3 in discharging pipe 21 department, make the structure of diaphragm pump compacter, small in size, occupation space is few, be convenient for installation and use.

As shown in fig. 2, 3 and 5, in a preferred embodiment, the bottom of the pressure plate 31 is in interference fit with the inner wall of the tapping pipe 21, the bottom of the outer side of the pressure plate 31 is provided with a second limit shoulder 313, the second limit shoulder 313 contacts with the bottom of the tapping pipe 21, the second limit shoulder 313 prevents the pressure plate 31 from entering the tapping pipe 21, the pressure plate 31 is in interference connection with the tapping pipe 21, on one hand, the pressure plate 31 is fixed to the discharge pipe 21, on the other hand, the airtightness between the pressure plate 31 and the tapping pipe 21 is increased, the outer side of the pressure plate 31 is provided with a ring groove 312, a sealing ring 34 is arranged in the ring groove 312, and the pressure plate 31 is in sealing connection with the tapping pipe 21 through the sealing ring 34, so that the static sealing between the pressure plate 31 and the tapping pipe 21 is realized.

As shown in fig. 2 and fig. 3, in a preferred embodiment, the pump body 1 further includes a valve plate 4, a reinforcing rib 41 is disposed on the valve plate 4, the bottom surface of the pressure plate 31 contacts the reinforcing rib 41, the pressure plate 31 is used for limiting the top of the valve plate 4, and the pressure plate 31 is in interference connection with the discharge pipe 21, so that the pressure plate 31 is fixedly connected with the discharge pipe 21, and at this time, the reinforcing rib 41 on the valve plate 4 contacts the pressure plate 31, so as to limit the top of the valve plate 4.

As shown in fig. 2 to 4, in a preferred embodiment, a positioning column 322 is disposed on the top of the sealing plug 32, the spring 33 is sleeved outside the positioning column 322, the bottom of the spring 33 is tapered, a first limiting shoulder 211 is disposed in the discharging pipe 21, the first limiting shoulder 211 is used for limiting the top of the spring 33, the spring 33 is limited and fixed by the positioning column 322 and the first limiting shoulder 211, so that the spring 33 is contracted within a certain range, and is not prone to deviation, thereby ensuring a stabilizing effect on the sealing plug 32, and thus ensuring normal opening and closing of the sealing assembly 3, and the lower end of the spring 33 is inverted tapered, so that the lower end of the spring 33 can be tightly fixed on the positioning column 322, and further fixing and limiting the lower end of the spring 33.

As shown in fig. 1-3, in a preferred embodiment, the upper lid 2 further includes a feeding pipe 22, the length of the feeding pipe 22 is smaller than that of the discharging pipe 21, the longer discharging pipe 21 allows a larger installation space in the pipe, which facilitates installation of the sealing assembly 3, and the feeding pipe 22 and the discharging pipe 21 are located at a relatively short distance, which is inconvenient for external connection of the pipe, and the different lengths of the feeding pipe 22 and the discharging pipe 21 allow a height difference to be formed between the feeding pipe 22 and the discharging pipe 21, which facilitates connection of the pipe.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. The utility model provides a prevent leaking structure for diaphragm pump, the diaphragm pump includes the pump body, is provided with the upper cover on the pump body, cover on and be provided with the discharging pipe, its characterized in that, be provided with seal assembly in the discharging pipe, seal assembly includes:

the pressing plate is vertically communicated and is positioned at the bottom of the discharge pipe;

the bottom of the sealing plug is provided with an arc surface, and the arc surface is in sealing contact with the top of the pressing plate;

a spring for urging the sealing plug against the pressure plate.

2. A leak prevention structure for a diaphragm pump as set forth in claim 1, wherein said pressure plate is provided at a top portion thereof with an arc-shaped seat, said arc-shaped seat being fitted with said arc-shaped surface.

3. A leakage preventing structure for a diaphragm pump according to claim 1, wherein an annular groove is formed outside the pressure plate, a sealing ring is disposed in the annular groove, and the pressure plate is sealingly connected to the discharge pipe through the sealing ring.

4. A leak-proof structure for a diaphragm pump according to claim 1, wherein a bottom portion of the pressure plate is interference-fitted to an inner wall of the discharge pipe.

5. A leakage prevention structure for a diaphragm pump according to claim 4, wherein said pump body further comprises a valve plate, a bottom surface of said pressure plate contacts said valve plate, and said pressure plate is configured to limit a top portion of said valve plate.

6. A leakage preventing structure for a diaphragm pump according to claim 1, wherein a positioning column is provided on a top of the sealing plug, and the spring is sleeved outside the positioning column.

7. A leak prevention structure for a diaphragm pump as described in claim 6 wherein said spring bottom is an inverted cone.

8. A leak prevention structure for a diaphragm pump as set forth in claim 1 wherein a first stop shoulder is provided in said discharge tube for stopping a top of said spring.

9. A leakage prevention structure for a diaphragm pump according to claim 1, wherein a second stopper shoulder is provided at a bottom portion outside the pressure plate, and the second stopper shoulder is in contact with a bottom surface of the discharge pipe.

10. A leak prevention structure for a diaphragm pump as set forth in claim 1, further comprising a feed pipe on said upper cover, said feed pipe having a length less than a length of said discharge pipe.

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