CN214616985U

CN214616985U - Electric diaphragm pump

Info

Publication number: CN214616985U
Application number: CN202120545176.0U
Authority: CN
Inventors: 曹美华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-11-05
Anticipated expiration: 2031-03-16

Abstract

The application relates to an electric diaphragm pump, which comprises a pump body, wherein one end of the pump body is provided with a liquid inlet, and the other end of the pump body is provided with a liquid outlet; the pump body is also provided with a liquid inlet cavity positioned between the liquid inlet and the liquid outlet, and the liquid inlet cavity is communicated with the liquid outlet; a diaphragm body is arranged in the liquid inlet cavity, a sealing valve seat used for respectively controlling the opening and closing of the liquid inlet and the liquid outlet is arranged on the diaphragm body, the sealing valve seat comprises an outer shell, an inner shell and a water sealing piece, and the inner shell is embedded in the outer shell; the water sealing piece is movably arranged in the inner shell along the water flow direction. This application has through the setting that adopts bilayer structure has improved the structural strength of sealed disk seat main part, has strengthened the effect of sealed disk seat main part's stability.

Description

Electric diaphragm pump

Technical Field

The application relates to the field of diaphragm pumps, in particular to an electric diaphragm pump.

Background

Diaphragm pumps are currently a type of pump body that relies on the back and forth movement of the diaphragm to vary the working chamber volume to effect the intake and discharge of fluid. The diaphragm cylinder head mainly comprises a transmission part and a diaphragm cylinder head, wherein the transmission part is used for driving a diaphragm sheet in the diaphragm cylinder head to swing back and forth, so that liquid is sucked from a liquid inlet of the diaphragm cylinder head and then is extruded from a liquid outlet of the diaphragm cylinder head.

Chinese patent No. CN201714638U in the related art discloses a vacuum diaphragm pump, which comprises a pump body and a motor, wherein an output shaft of the motor is sleeved with an eccentric wheel, the eccentric wheel is sleeved with a bearing, and the bearing is connected with the pump body through a connecting rod; a diaphragm main body is arranged in the pump body and is arranged on a connecting rod, and the connecting rod drives the diaphragm main body to swing back and forth under the driving of an eccentric wheel after a motor is started; the diaphragm main body is provided with a liquid inlet sealing piece and a liquid outlet sealing piece, the liquid inlet sealing piece is used for controlling the opening and closing of a liquid inlet of the pump body, and the liquid outlet sealing piece is used for controlling the opening and closing of a liquid outlet of the pump body; when the connecting rod drives the diaphragm main body to press down, the liquid inlet sealing piece opens the liquid inlet, and liquid flows into the pump body; when the diaphragm main body is jacked upwards by the connecting rod, the liquid outlet sealing piece opens the liquid outlet of the pump body under the action of the liquid and the pressure of the diaphragm main body, and at the moment, the liquid in the pump body can be pressed out from the liquid outlet.

In view of the above-mentioned related technologies, the inventor believes that, when the liquid inlet sealing element and the liquid outlet sealing element work, the liquid inlet sealing element and the liquid outlet sealing element not only need to bear the pressure of water flow, but also need to bear the pressure applied by the diaphragm main body, and under the combined action of double pressures, the sealing element with a relatively single thin structure is easy to deform and even break, and finally normal use of the diaphragm pump will be affected.

SUMMERY OF THE UTILITY MODEL

In order to improve the lower problem of inside sealing member intensity of diaphragm pump, this application provides an electric diaphragm pump.

The application provides an electric diaphragm pump adopts following technical scheme:

an electric diaphragm pump comprises a pump body, wherein one end of the pump body is provided with a liquid inlet, and the other end of the pump body is provided with a liquid outlet; the pump body is also provided with a liquid inlet cavity positioned between the liquid inlet and the liquid outlet, and the liquid inlet cavity is communicated with the liquid outlet; a diaphragm body is arranged in the liquid inlet cavity, a sealing valve seat used for respectively controlling the opening and closing of the liquid inlet and the liquid outlet is arranged on the diaphragm body, the sealing valve seat comprises an outer shell, an inner shell and a water sealing piece, and the inner shell is embedded in the outer shell; the water sealing piece is movably arranged in the inner shell along the water flow direction.

By adopting the technical scheme, the diaphragm body can be reciprocally blown back and forth in the pump body when the pump body works, negative pressure is formed in the liquid inlet cavity when the diaphragm body is pressed down, the water sealing piece at the liquid inlet opens the sealing valve seat, and liquid can be pumped into the liquid inlet cavity from the liquid inlet; when the diaphragm body is jacked up, the water sealing piece at the liquid outlet opens the sealing valve seat, and meanwhile, the sealing valve seat at the liquid inlet is closed, so that the liquid in the liquid inlet cavity can be smoothly extruded out from the liquid outlet; along with the reciprocating motion of the diaphragm body, the liquid flowing in from the liquid inlet can be continuously extruded from the liquid outlet; because the main body part of the sealing valve seat is formed by sleeving the outer shell and the inner shell, the structural strength of the main body part of the sealing valve seat is improved by adopting a double-layer structure, and the stability of the main body part of the sealing valve seat can be enhanced, so that the sealing valve seat is more stable and firmer when the on-off of liquid is controlled; the main body part of the sealing valve seat is not easy to deform or break due to the double pressure of the liquid and the diaphragm body, and the whole service life of the sealing valve seat is prolonged; meanwhile, the transportation work of different corrosive liquids can be further expanded, and the sealing valve seat is more durable.

Preferably, be provided with the spacing groove of opening towards interior casing inserting direction in the shell body, spacing inslot embedding has the sealing washer, interior casing compresses tightly the sealing washer in the spacing inslot.

Through adopting above-mentioned technical scheme, the sealing washer that sets up between shell body and interior casing has improved the leakproofness between the two to can effectively prevent the gap outflow between shell body and the interior casing of liquid intracavity.

Preferably, be formed with spacing platform on the water sealing spare, work as when the water sealing spare will seal the disk seat and close, spacing platform and sealing washer laminate each other.

Through adopting above-mentioned technical scheme, when the water sealing spare will seal the disk seat closure, can not only restrict the maximum range of sliding of water sealing spare through spacing platform, make water sealing spare can not break away from in the interior casing, moreover through spacing platform and the laminating each other of sealing washer, can further improve the leakproofness between water sealing spare and the interior casing, make liquid be difficult for flowing from the gap between water sealing spare and the interior casing.

Preferably, the pump body is including the closing cap that closes the feed liquor chamber lid, be provided with the spring that stretches out and draws back along the rivers direction between closing cap and the water sealing spare, the spring compresses tightly the water sealing spare on the sealing washer.

By adopting the technical scheme, when the sealing cover covers the liquid inlet cavity, the spring positioned between the sealing cover and the water sealing piece can press the water sealing piece on the sealing ring, and the sealing property between the water sealing piece and the inner shell is further enhanced by the spring; when liquid flows into the liquid inlet cavity from the liquid inlet, the spring at the liquid inlet is gradually jacked up by the water sealing piece, and at the moment, the liquid can smoothly flow into the liquid inlet cavity.

Preferably, the limiting table is provided with a limiting column facing the spring, the sealing cover is provided with an inserting column opposite to the limiting column, one end of the spring is sleeved on the outer side of the limiting column, and the other end of the spring is sleeved on the outer side of the inserting column.

Through adopting above-mentioned technical scheme, when the spring takes place to compress under the effect of sealing water spare, can play the effect of direction to the flexible deformation of spring through setting up the spacing post at spring both ends with inserting the post, unnecessary when reducing the spring and stretching out and drawing back is crooked, improves the stability when the spring stretches out and draws back.

Preferably, the limiting table is provided with a retreating groove, and the limiting column is arranged in the retreating groove; one end of the spring is embedded in the retreat groove.

By adopting the technical scheme, the connection firmness between the spring and the limiting table can be further improved under the action of the retreat groove; through spacing fixing spring one end on spacing bench to enable the difficult spacing bench of following of spring and drop, improved the stability of spring.

Preferably, the outer side wall of the outer shell is provided with a limiting ring, the diaphragm body is provided with a yielding groove, and the limiting ring is attached to the side wall of the yielding groove.

Through adopting above-mentioned technical scheme, when installing the shell body on the diaphragm body, insert the shell body on the diaphragm body earlier, the rethread compresses tightly the spacing ring at the inslot that steps down, can not only realize spacing in diaphragm body one side and provide the support to outer casing one end with shell body one end through the spacing ring, and through the mutual contact of spacing ring and the groove lateral wall that steps down, area of contact between the two can also be increased in addition, make the more stable installation of shell body on the diaphragm body.

Preferably, the outer side wall of the inner shell is provided with a pressing ring, and the pressing ring is attached to the outer side wall of the outer shell.

Through adopting above-mentioned technical scheme, when embedding interior casing in the shell body, through the laminating each other between clamping ring and the shell body, increased the area of contact between interior casing and the shell body to can prevent the relative displacement between interior casing and shell body, improve the stability when both are connected.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by adopting the double-layer structure, the structural strength of the main body part of the sealing valve seat is improved, and the stability of the main body part of the sealing valve seat can be enhanced, so that the sealing valve seat is more stable and firmer when the on-off of liquid is controlled; the main body part of the sealing valve seat is not easy to deform or break due to the double pressure of the liquid and the diaphragm body, and the whole service life of the sealing valve seat is prolonged; meanwhile, the transportation work of different corrosive liquids can be further expanded, so that the sealing valve seat is more durable;

2. when the water sealing piece is closed to the sealing valve seat, the maximum sliding range of the water sealing piece can be limited through the limiting table, the water sealing piece can not be separated from the inner shell, the sealing performance between the water sealing piece and the inner shell can be further improved through mutual attachment of the limiting table and the sealing ring, and liquid can not easily flow out from a gap between the water sealing piece and the inner shell.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is an exploded view of the partial structure of fig. 1.

Fig. 3 is an exploded view of the partial structure of fig. 2.

FIG. 4 is a schematic view of a portion of the raised cover of FIG. 1 at the post.

Description of reference numerals: 1. a pump body; 11. a liquid inlet; 12. a liquid outlet; 13. a liquid inlet cavity; 14. a septum body; 141. a yielding groove; 142. a liquid inlet hole; 143. a liquid outlet hole; 2. sealing the valve seat; 21. an outer housing; 211. a limiting ring; 22. an inner housing; 221. pressing a ring; 23. a water sealing member; 231. a limiting table; 232. a limiting column; 233. a withdrawal groove; 24. a limiting groove; 25. a seal ring; 3. sealing the cover; 31. a spring; 32. inserting a column; 4. an electric motor.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses an electric diaphragm pump. Referring to fig. 1 and 2, the electric diaphragm pump includes a pump body 1, a liquid inlet 11 is arranged at one end of the pump body 1, a liquid outlet 12 is arranged at the other end of the pump body 1, a liquid inlet cavity 13 communicating the liquid inlet 11 with the liquid outlet 12 is further arranged in the pump body 1, and the liquid inlet 11 and the liquid outlet 12 are symmetrically arranged at two sides of the liquid inlet cavity 13. A diaphragm body 14 is arranged in the liquid inlet cavity 13, a liquid inlet hole 142 opposite to the liquid inlet 11 and a liquid outlet hole 143 opposite to the liquid outlet 12 are arranged on the diaphragm body 14 in a penetrating manner, and sealing valve seats 2 for controlling the on-off of liquid are respectively arranged in the liquid inlet hole 142 and the liquid outlet hole 143. The pump body 1 further comprises a sealing cover 3 which is screwed and fixed through bolts, the sealing cover 3 tightly presses one circle of edge of the diaphragm body 14 on the side wall of the liquid inlet cavity 13, and a closed space is formed inside the liquid inlet cavity 13 through the sealing cover 3.

As shown in fig. 2 and 3, a motor 4 is installed at one end of the pump body 1, an eccentric wheel is fixedly installed on an output shaft of the motor 4, and the eccentric wheel of the motor 4 is inserted into the pump body 1. A driving piece fixedly connected with the middle part of the diaphragm body 14 is movably arranged in the pump body 1, and an eccentric wheel of the motor 4 is inserted into the driving piece. The diaphragm body 14 is made of rubber material, and by starting the motor 4, the eccentric wheel drives the middle part of the diaphragm body 14 to swing back and forth in a direction close to or far away from the sealing cover 3. When the middle part of the diaphragm body 14 swings towards the direction far away from the sealing cover 3, negative pressure is formed inside the liquid inlet cavity 13, and when the middle part of the diaphragm body 14 swings towards the direction close to the sealing cover 3, liquid flowing into the liquid inlet cavity 13 is pressed out from the liquid outlet 12.

As shown in fig. 2 and 3, the sealing valve seat 2 disposed in the liquid inlet hole 142 and the sealing valve seat 2 disposed in the liquid outlet hole 143 are disposed in an inverted manner along the direction of the liquid entering and exiting from the liquid inlet chamber 13. The sealing valve seat 2 comprises a tubular outer shell 21 with a hollow inner shell 22 nested in the outer shell 21, and the outer side wall of the inner shell 22 is mutually attached and tightly abutted with the inner side wall of the outer shell 21. The sealing valve seat 2 further comprises a water sealing part 23 movably arranged in the inner shell 22 along the liquid flowing direction, a limiting groove 24 with an opening facing the inserting direction of the inner shell 22 is arranged in the outer shell 21, a sealing ring 25 is embedded in the limiting groove 24 along the inserting direction of the inner shell 22, and the inner shell 22 compresses the sealing ring 25 in the limiting groove 24. The cross section of the head of the water sealing piece 23 is cross-shaped, the head can penetrate out from one end of the inner shell 22 close to the sealing ring 25, and the middle part of the water sealing piece 23 is integrally formed with a limiting table 231 parallel to the sealing ring 25. When the water seal member 23 slides in a direction close to the sealing ring 25, the limit table 231 is attached to the sealing ring 25, the sealing valve seat 2 is closed, and liquid cannot pass through the sealing valve seat 2.

As shown in fig. 3 and 4, a limiting column 232 is integrally formed on a side wall of the limiting table 231 facing away from the sealing ring 25, and central axes of the limiting column 232 and the limiting table 231 are coincident with each other. The limiting column 232 is used for being sleeved with a spring 31, and the spring 31 extends and retracts along the direction that liquid flows into or out of the liquid inlet cavity 13. An inserting column 32 opposite to the limiting column 232 is integrally formed on the inner side wall of the sealing cover 3 facing the limiting column 232, one end of the spring 31 is sleeved on the outer side of the limiting column 232, and the other end of the spring 31 is sleeved on the outer side of the inserting column 32. The side wall of the position limiting table 231 facing the spring 31 is provided with a position withdrawing groove 233, the position limiting column 232 is formed on the side wall of the position withdrawing groove 233, and one end of the spring 31 is embedded in the position withdrawing groove 233. The stop block 231 is pressed against the sealing ring 25 by the spring 31.

As shown in fig. 3 and 4, the outer side wall of the outer casing 21 is integrally formed with a limiting ring 211, the diaphragm body 14 is provided with a relief groove 141 for embedding the limiting ring 211, when the outer casing 21 is mounted on the diaphragm body 14, the limiting ring 211 is embedded and pressed in the relief groove 141, the limiting ring 211 is tightly attached to the side wall of the relief groove 141 after being mounted in place, and the outer casing 21 can be limited on one side of the diaphragm body 14 under the action of the limiting ring 211. The outer side wall of the inner shell 22 placed at the liquid outlet 143 is integrally formed with a pressing ring 221 positioned outside the outer shell 21, the pressing ring 221 is parallel to the limiting ring 211, and the pressing ring 221 is positioned on one side of the outer shell 21 far away from the limiting ring 211. The press ring 221 is attached to the outer side wall of the outer case 21.

The implementation principle of the electric diaphragm pump in the embodiment of the application is as follows: after the motor 4 is started, the pump body 1 starts to work, and during work, the eccentric wheel on the motor 4 drives the middle part of the diaphragm body 14 to do reciprocating swing towards the direction close to or far away from the adjacent seal cover 3. When the diaphragm body 14 is pressed down, a negative pressure is formed in the liquid inlet cavity 13, the water sealing member 23 located at the liquid inlet 11 opens the sealing valve seat 2, and liquid can be pumped into the liquid inlet cavity 13 from the liquid inlet 11. When the diaphragm body 14 is lifted, the water sealing member 23 at the liquid outlet 12 opens the sealing valve seat 2, and at the same time, the sealing valve seat 2 at the liquid inlet 11 closes, so that the liquid in the liquid inlet chamber 13 can be smoothly pressed out from the liquid outlet 12. With the reciprocation of the diaphragm body 14, the liquid introduced from the liquid inlet 11 can be continuously pressed out from the liquid outlet 12. Because the main part of the sealing valve seat 2 is formed by compressing and sleeving the outer shell 21 and the inner shell 22, the structural strength of the main part of the sealing valve seat 2 is improved by adopting a double-layer structure, and the stability of the main part of the sealing valve seat 2 can be enhanced, so that the sealing valve seat 2 is more stable and firm when the liquid is controlled to be switched on and off. The main body part of the sealing valve seat 2 is not easy to deform or break due to the double pressure of the liquid and the diaphragm body 14, and the whole service life of the sealing valve seat 2 is prolonged. Meanwhile, the transportation work of different corrosive liquids can be further expanded, and the sealing valve seat 2 is more durable.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An electric diaphragm pump comprises a pump body (1), wherein one end of the pump body (1) is provided with a liquid inlet (11), and the other end of the pump body (1) is provided with a liquid outlet (12); the pump body (1) is also provided with a liquid inlet cavity (13) positioned between the liquid inlet (11) and the liquid outlet (12), and the liquid inlet cavity (13) is used for communicating the liquid inlet (11) with the liquid outlet (12); be provided with diaphragm body (14), its characterized in that in feed liquor chamber (13): the diaphragm body (14) is provided with a sealing valve seat (2) for respectively controlling the opening and closing of the liquid inlet (11) and the liquid outlet (12), the sealing valve seat (2) comprises an outer shell (21), an inner shell (22) and a water sealing piece (23), and the inner shell (22) is embedded in the outer shell (21); the water sealing piece (23) is movably arranged in the inner shell (22) along the water flow direction.

2. An electric diaphragm pump according to claim 1, characterized in that: be provided with spacing groove (24) that the opening inserted the direction towards interior casing (22) in shell body (21), embedding has sealing washer (25) in spacing groove (24), interior casing (22) compress tightly sealing washer (25) in spacing groove (24).

3. An electric diaphragm pump according to claim 2, characterized in that: be formed with spacing platform (231) on water sealing member (23), when water sealing member (23) will seal valve seat (2) and close, spacing platform (231) and sealing washer (25) are laminated each other.

4. An electric diaphragm pump according to claim 3, characterized in that: the pump body (1) is including closing cap (3) with feed liquor chamber (13) lid, be provided with between closing cap (3) and water sealing spare (23) along the flexible spring (31) of rivers direction, spring (31) will seal water spare (23) and compress tightly on sealing washer (25).

5. An electric diaphragm pump according to claim 4, characterized in that: be provided with spacing post (232) towards spring (31) on spacing platform (231), be provided with on closing cap (3) and insert post (32) relative with spacing post (232), spring (31) pot head is established in spacing post (232) outside, spring (31) other pot head is established and is inserted the post (32) outside.

6. An electric diaphragm pump according to claim 5, characterized in that: the limiting table (231) is provided with a retreating groove (233), and the limiting column (232) is arranged in the retreating groove (233); one end of the spring (31) is embedded in the retreat groove (233).

7. An electric diaphragm pump according to claim 1, characterized in that: be provided with spacing ring (211) on shell body (21) lateral wall, be provided with groove of stepping down (141) on diaphragm body (14), spacing ring (211) and the lateral wall laminating in groove of stepping down (141).

8. An electric diaphragm pump according to claim 1, characterized in that: be provided with clamping ring (221) on inner housing (22) lateral wall, clamping ring (221) and outer shell (21) lateral wall laminating.