Valve seat structure of diaphragm pump and diaphragm pump

Abstract

The utility model discloses a valve seat structure of a diaphragm pump and the diaphragm pump, a valve seat is provided with a water inlet seat, and a water inlet valve is installed on the water inlet seat; a mounting hole is formed in the water inlet seat, and a water inlet hole is formed in one side of the mounting hole; the water inlet valve comprises a water inlet valve plate and a water inlet valve rod which are connected, the water inlet valve rod is mounted in the mounting hole, and the water inlet valve plate is used for movably opening and closing the water inlet; the water inlet valve plate is located on the front face of the water inlet seat, and a guide seat is further installed on the back face of the water inlet seat and can be installed in the installation hole in a reciprocating sliding mode. One end of the water inlet valve rod is fixedly connected with the water inlet valve plate, and the other end penetrates through and is fixed in a middle connecting hole of the guide seat in the mounting hole; the end, away from the water inlet valve block, of the guide seat extends out of the mounting hole and is provided with a radially-protruding limiting part. The two ends of the pressure spring abut against the limiting part and the edge of the mounting hole in the back face of the water inlet base respectively. By arranging the sliding water inlet valve rod, the cost is low, the service life is long, and the problem that sticky liquid is difficult to suck can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a valve seat structure of a diaphragm pump and a diaphragm pump. Background Art

[0002] The diaphragm pump is a new type of conveying machinery, usually including pump head, pump seat, valve seat, diaphragm, swing bracket, motor and other parts. It can convey common liquids or various corrosive liquids, liquids with particles, high viscosity, volatile, flammable, highly toxic liquids, etc. At present, agricultural automation is developing rapidly, and people are increasingly favoring the use of diaphragm pumps to achieve agricultural irrigation automation. Since the diaphragm pumps on the market have insufficient suction when extracting relatively viscous liquid fertilizers, a diaphragm pump with large flow, high pressure, and the ability to extract viscous liquids is needed.

[0003] The water inlet valve of an existing diaphragm pump usually adopts a fixed structure, and mainly uses the negative pressure generated by the movement of the diaphragm in the pump body to deform the bowl-shaped water inlet valve plate of the fixed water inlet valve to open the water inlet hole. However, since the viscous liquid has a large adsorption force on the bowl-shaped water inlet valve plate, the diaphragm pump lacks suction when pumping the viscous liquid.

[0004] A common solution is to increase the power of the motor to increase the flow rate and suction pressure to improve the permeability of the diaphragm pump. However, since the high speed of the motor will inevitably lead to a large current, the motor will heat up when the current is large, and the life of the motor will be short, resulting in a shortened service life of the diaphragm pump, requiring frequent replacement and maintenance, and increasing costs.

[0005] However, there is a diaphragm pump and a diaphragm pump compression spring valve disclosed in Chinese patent authorization announcement No. CN203614385U. In this solution, the piston is set as a thicker rubber sealing sheet for the purpose of wear resistance, and in order to prevent the rubber sealing sheet from failing to seal with the valve cavity, a compression spring is installed between the piston guide rod and the mounting hole; in this solution, the gland and the piston guide rod are threadedly connected as one, so the piston guide rod needs to be made of hard material to ensure the threaded connection, but the long-term reciprocating activity of the piston still easily causes the threads between the gland and the piston guide rod to separate from each other, resulting in a short service life of the diaphragm pump. Since the piston guide rod is made of a hard material, while the piston needs to be made of a soft material, the piston in this solution is a structure that is injection molded and coated on one end of the piston guide rod, so that the overall thickness of the piston is relatively large; therefore, when the piston opens the water inlet hole, the edge of the piston cannot deform to open the water inlet hole, and the piston guide rod needs to be driven to slide a larger stroke to open the water inlet hole, which causes the motor to need to increase the current, increase the motor power, and shorten the motor life; in summary, the diaphragm pump of this solution is not suitable for pumping viscous liquids.

[0006] In view of this, the utility model proposes a brand-new valve seat structure of a diaphragm pump and a diaphragm pump to solve the above problems and defects of the existing structure. Utility Model Content

[0007] The utility model aims to provide a diaphragm pump valve seat structure and a diaphragm pump, which are convenient for extracting viscous liquid and have the advantages of long service life and low cost.

[0008] In order to achieve the above purpose, the solution of the utility model is:

[0009] A valve seat structure of a diaphragm pump, wherein the valve seat comprises an inlet seat and an outlet seat, an inlet valve is mounted on the inlet seat, and an outlet valve is mounted on the outlet seat;

[0010] The water inlet seat is provided with a mounting hole, and a water inlet hole is provided on one side of the mounting hole; the water inlet valve comprises a connected water inlet valve plate and a water inlet valve stem, the water inlet valve stem is installed in the mounting hole, and the water inlet valve plate is a "bowl plate" shaped structure, which is used to flexibly open and close the water inlet hole;

[0011] The water inlet valve plate is located on the front of the water inlet seat, and a guide seat is also installed on the back of the water inlet seat, and the guide seat can be reciprocatingly slidably installed in the installation hole; one end of the water inlet valve stem is connected and fixed to the water inlet valve plate, and the other end is passed through and fixed to the middle connection hole of the guide seat in the installation hole;

[0012] One end of the guide seat away from the water inlet valve plate extends out of the mounting hole and has a radially protruding limiting portion;

[0013] A compression spring is sleeved on the guide seat, and two ends of the compression spring are respectively against the edge of the mounting hole on the back of the limiting portion and the water inlet seat;

[0014] A blocking ring is arranged between the compression spring and the edge of the mounting hole.

[0015] Furthermore, the outer wall of the guide seat is loosely matched with the inner wall of the mounting hole; the blocking ring is pressed by the compression spring and is tightly attached to the edge of the mounting hole, and the inner ring edge of the blocking ring is elastically matched with the outer wall of the guide seat.

[0016] Furthermore, an annular mounting protrusion is protruded from the edge of the mounting hole, and an annular groove is concavely provided on the blocking ring, and the annular groove is engaged with the mounting protrusion.

[0017] Furthermore, the middle connecting hole of the guide seat passes through both ends of the guide seat, and the water inlet valve stem passes through the middle connecting hole; the water inlet valve stem is provided with an annular groove, and the middle connecting hole of the guide seat is provided with an annular clamping block, which is clamped in the annular groove.

[0018] Furthermore, the mounting hole is arranged in the middle of the water inlet seat, and the water inlet holes are multiple and distributed around the mounting hole; the water outlet seat is arranged in the middle of the valve seat, and the water inlet seat is arranged on the periphery of the water outlet seat; the water outlet seat is provided with a water outlet hole, and the water outlet valve on the water outlet seat can flexibly open and close the water outlet hole.

[0019] Furthermore, the front side of the water inlet seat and the water inlet valve plate is an arc-shaped concave surface, and the water inlet valve plate is in an inverted "bowl plate" shape to adapt to the arc-shaped concave surface.

[0020] The utility model also provides a diaphragm pump, comprising a pump head, a pump seat, a swing bracket, a diaphragm, a motor and the valve seat structure; the pump head, the pump seat and the motor are connected in sequence; the motor is installed under the pump seat, the power output end of the motor is inserted into the pump seat and the swing bracket is installed, the valve seat is spaced between the pump head and the pump seat, and is located above the swing bracket; the diaphragm is located between the valve seat and the swing bracket, a water inlet cavity and a water outlet cavity are formed between the pump head and the valve seat, and the pump head is provided with a water inlet connected to the water inlet cavity and a water outlet connected to the water outlet cavity.

[0021] Furthermore, the valve seat has a circular water outlet area in the middle, and the water outlet area is surrounded by an annular wall protruding from the top of the valve seat; the water outlet area has five water outlet seats distributed circumferentially evenly; the outer periphery of the water outlet area has five water inlet seats distributed circumferentially evenly, and each water inlet seat is radially opposite to each water outlet seat; the valve seat and the pump head are connected and cooperated, and the water outlet cavity is formed between the inside of the circular water outlet area and the pump head, and the water inlet cavity is formed between the outside of the circular water outlet area and the pump head.

[0022] Furthermore, a pressure relief channel and a pressure sealing chamber are also provided in the pump head. One end of the pressure relief channel is connected to the water inlet, and the other end has a conducting hole. The conducting hole is connected to the pressure sealing chamber. The pressure sealing chamber has a pressure hole on one side of the conducting hole that is connected to the water outlet. An elastic diaphragm and a diaphragm spring are provided in the pressure sealing chamber. The elastic diaphragm is pushed against by the diaphragm spring to synchronously seal the conducting hole and the pressure hole.

[0023] Furthermore, the water inlet and the water outlet are respectively arranged on both sides of the top of the pump head, and the pressure relief channel is horizontally arranged between the water inlet and the water outlet, and the conducting hole is arranged at the top of the pressure relief channel; the pressure sealing cavity is recessed on the top surface of the pump head, and the bottom of the pressure sealing cavity is vertically opposite to the conducting hole and the pressure hole, and the top of the pressure sealing cavity is locked and closed by a mounting plate, and the diaphragm spring is installed in the pressure sealing cavity, and the two ends of the diaphragm spring are respectively against the mounting plate and the elastic diaphragm.

[0024] Furthermore, the pump head, the pump seat and the motor are fixed as a whole by a plurality of connecting screws distributed at intervals in the circumferential direction.

[0025] Furthermore, a one-way valve assembly is installed on the water outlet channel inside the water outlet; the outer peripheral wall of the one-way valve assembly is provided with an annular sealing ring, which is sealed with the water outlet channel through the annular sealing ring; the inner end of the one-way valve assembly away from the water outlet is also provided with a plurality of radially outwardly protruding elastic hooks, and the inner side of the water outlet channel is provided with a radially recessed mounting groove; the one-way valve assembly is installed inward from the water outlet, and is mounted in the mounting groove inside the water outlet channel by means of the elastic hook.

[0026] After adopting the above technical solution, the utility model of a diaphragm pump and valve seat structure can overcome the problem of the inlet valve plate being difficult to open in the suction of viscous liquids by improving the existing fixed structure of the inlet valve stem into a sliding inlet valve stem, and at the same time can reset the guide seat and the inlet valve through the compression spring. Moreover, there is no need to increase the motor current, etc., to avoid shortening the motor life and improve the product life, and can achieve high flow, high pressure, and can extract viscous liquids. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of a diaphragm pump according to an embodiment of the present utility model;

[0028] Figure 2 This is an exploded view of a diaphragm pump according to an embodiment of the present utility model;

[0029] Figure 3 A cross-sectional view of a diaphragm pump according to an embodiment of the utility model;

[0030] Figure 4 This is an exploded view of the valve seat of the embodiment of the utility model;

[0031] Figure 5 A schematic diagram of a water inlet valve according to an embodiment of the utility model;

[0032] Figure 6 It is a cross-sectional view of a valve seat according to an embodiment of the utility model;

[0033] Figure 7 It is a cross-sectional view of a pump head according to an embodiment of the present utility model.

[0034] Description of reference numerals: pump head 1, pressure sealing chamber 11, pressure hole 111, elastic diaphragm 121, diaphragm spring 122, mounting plate 13, water outlet channel 14, mounting slot 141, pump seat 2, swing bracket 3, diaphragm 4, motor 5, valve seat 6, water outlet seat 61, water outlet hole 611, water inlet seat 62, water inlet hole 621, mounting hole 622, mounting convex ring 6221, arc-shaped concave surface 623, water outlet valve 63, water inlet valve 64, water inlet valve plate 641 , water inlet valve stem 642, annular groove 6421, water outlet area 65, annular wall 66, guide seat 67, middle connecting hole 671, annular block 6711, limiting portion 672, compression spring 68, blocking ring 69, inner ring edge 691, annular groove 692, water inlet chamber 7, water inlet 71, water outlet chamber 8, water outlet 81, pressure relief channel 9, conducting hole 91, one-way valve assembly 10, annular sealing ring 101, elastic hook 102, connecting screw 20. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] like Figures 1 to 3 As shown, the diaphragm pump of the utility model comprises a pump head 1, a pump seat 2, a swing bracket 3, a diaphragm 4, a motor 5 and a valve seat 6.

[0037] The pump head 1, the pump seat 2 and the motor 5 are connected in sequence; the motor 5 is installed under the pump seat 2, the power output end of the motor 5 is placed in the pump seat 2 and the swing bracket 3 is installed, the valve seat 6 is located between the pump head 1 and the pump seat 2, and is located above the swing bracket 3; the diaphragm 4 is located between the valve seat 6 and the swing bracket 3, and a water inlet chamber 7 and a water outlet chamber 8 are formed between the pump head 1 and the valve seat 6. The pump head 1 has a water inlet 71 connected to the water inlet chamber 7 and a water outlet 81 connected to the water outlet chamber 8.

[0038] The valve seat 6 in this embodiment has a circular water outlet area 65 in the middle, and the water outlet area 65 is surrounded by an annular wall 66 protruding from the top of the valve seat 6; the water outlet area 65 has five circumferentially equidistantly distributed water outlet seats 61, and a water outlet valve 63 is installed on the water outlet seat 61; the outer periphery of the water outlet area 65 has five circumferentially equidistantly distributed water inlet seats 62, each water inlet seat 62 is radially opposite to each water outlet seat 61, and a water inlet valve 64 is installed on the water inlet seat 62; the valve seat 6 and the pump head 1 are connected and cooperated, and the water outlet cavity 8 is formed between the circular water outlet area 65 and the pump head 1, and each water outlet seat 61 is located in the water outlet cavity 8, and the water inlet cavity 7 is formed between the outside of the circular water outlet area 65 and the pump head 1, and each water inlet seat 62 is located in the water inlet cavity 7.

[0039] In this embodiment, the pump head 1, the pump base 2 and the motor 5 are fixed together by a plurality of connecting screws 20 distributed at intervals in the circumferential direction.

[0040] In this way, a pipe is connected at the water inlet 71 and placed in the liquid. The motor 5 is energized, and the rotation of the motor 5 drives the swing bracket 3 to rotate, so that the diaphragm 4 swings up and down, and the liquid is drawn up from the water inlet 71, passed through the water inlet valve 64, and then discharged from the water outlet valve 63, and finally flows out from the water outlet 81.

[0041] Based on the existing problem that viscous liquids are difficult to pump, the utility model improves the structure of the valve seat 6 without increasing the current and power of the motor 5 .

[0042] like Figures 4 to 6 As shown, the valve seat 6 structure of the diaphragm pump of the utility model, the water inlet seat 62 of the valve seat 6 is provided with a mounting hole 622, and a water inlet hole 621 is provided on one side of the mounting hole 622; the water inlet valve 64 includes a connected water inlet valve plate 641 and a water inlet valve stem 642, the water inlet valve stem 642 is installed in the mounting hole 622, and the water inlet valve plate 641 is a "bowl plate" shaped structure, which is used to movably open and close the water inlet hole 621.

[0043] The water inlet valve plate 641 is located on the front side of the water inlet seat 62, and a guide seat 67 is also installed on the back side of the water inlet seat 62. The guide seat 67 can be installed in the mounting hole 622 for reciprocating sliding. One end of the water inlet valve stem 642 is connected and fixed to the water inlet valve plate 641, and the other end is passed through and fixed to the middle connecting hole 671 of the guide seat 67 in the mounting hole 622. The water inlet valve 64 can slide back and forth in the mounting hole 622 along with the guide seat 67.

[0044] One end of the guide seat 67 away from the water inlet valve plate 641 extends out of the mounting hole 622 and has a radially protruding limit portion 672; a compression spring 68 is sleeved on the guide seat 67, and the two ends of the compression spring 68 respectively abut against the limit portion 672 and the edge of the mounting hole 622 on the back of the water inlet seat 62. The compression spring 68 is arranged to push the water inlet valve 64 toward the back of the water inlet seat 62, so that the water inlet valve plate 641 of the water inlet valve 64 is pressed against the water inlet hole 621 on the front of the water inlet seat 62, so as to block and close the water inlet hole 621.

[0045] By this means, the compression spring 68 and the slidable guide seat 67 are provided, and the existing water inlet valve stem 642 fixed to the water inlet seat 62 is changed into a sliding fit with the water inlet seat 62 with the compression spring 68 abutting against it, so that when sucking viscous liquid, the water inlet hole 621 can be opened more conveniently; specifically, when the water inlet chamber 7 (pressure-free chamber) is filled with viscous liquid, since the conventional water inlet valve plate is fixed and has a full circular edge, the stress generated is too large, and the conventional water inlet valve plate will be The viscous liquid is adsorbed, causing the diaphragm pump to run idle all the time; the water inlet valve stem fixed to the water inlet seat is now set to a structure that slides with the mounting hole 622, so that when the viscous liquid is extracted, the water inlet valve plate 641 can slide as a whole in a direction away from the water inlet port 71, and at the same time, the water inlet valve plate 641 can be deformed as a whole to open the water inlet hole 621, so that the viscous liquid can be more easily extracted from the water inlet valve 64 through the water inlet hole 621, and then discharged from the water outlet cavity 8 and the water outlet 81 through the water outlet valve 63. In this way, the problem of viscous liquid being difficult to suck is solved. At the same time, the guide seat 67 and the water inlet valve 64 can be reset by the compression spring 68.

[0046] like Figure 6 As shown, in order to facilitate the sliding of the water inlet valve 64, in this embodiment, the outer wall of the guide seat 67 and the inner wall of the mounting hole 622 are gap-matched; and a blocking ring 69 is provided between the compression spring 68 and the edge of the mounting hole 622 to ensure that there is no small particle impurity flow in the gap between the outer wall of the guide seat 67 and the inner wall of the mounting hole 622, to prevent jamming and to avoid affecting the normal operation of the water inlet valve 64; specifically, the blocking ring 69 is pressed by the compression spring 68 and is close to the edge of the mounting hole 622, and the inner ring edge 691 of the blocking ring 69 is elastically matched with the outer wall of the guide seat 67, so that the inner ring edge 691 of the blocking ring 69 can swing together with the up and down sliding of the guide seat 67, and some impurity-free liquid can enter the gap during the swinging process of the inner ring edge 691, which can lubricate the gap between the guide seat 67 and the mounting hole 622 to reduce friction and take away the heat generated by friction.

[0047] like Figure 6As shown, in this embodiment, the edge of the mounting hole 622 also protrudes with an annular mounting protrusion 6221, and the blocking ring 69 is concavely provided with an annular groove 692, which is engaged with the mounting protrusion 6221. This facilitates the installation of the blocking ring 69, and at the same time, with the pressure of the compression spring 68, the blocking ring 69 is accurately positioned and engaged with the mounting protrusion 6221, so as to prevent the blocking ring 69 from shifting during the sliding process of the guide seat 67.

[0048] like Figure 6 As shown, the middle connection hole 671 of the guide seat 67 passes through both ends of the guide seat 67, and the water inlet valve stem 642 passes through the middle connection hole 671; the water inlet valve stem 642 is provided with an annular groove 6421, and the middle connection hole 671 of the guide seat 67 is provided with an annular block 6711, and the annular block 6711 is clamped in the annular groove 6421. The annular block 6711 can be formed by radially protruding from the inner wall of the middle connection hole 671, and can be interference-fitted with the position of the annular groove 6421, so as to prevent the water inlet valve stem 642 and the guide seat 67 from slipping off.

[0049] like Figure 4 As shown, the mounting hole 622 is arranged in the middle of the water inlet seat 62, and the water inlet hole 621 can be multiple and distributed around the mounting hole 622; the valve seat 6 has a water outlet seat 61 in the middle, and the valve seat 6 has the water inlet seat 62 arranged on the periphery of the water outlet seat 61; the water outlet seat 61 is provided with a water outlet hole 611, and the water outlet valve 63 is installed on the water outlet seat 61 to flexibly open and close the water outlet hole 611.

[0050] Furthermore, the front side of the water inlet seat 62 and the water inlet valve plate 641 that fits together is an arc-shaped concave surface 623 , and the water inlet valve plate 641 is in an inverted “bowl plate” shape to fit the arc-shaped concave surface 623 .

[0051] In order to prevent excessive pressure in the water outlet chamber 8 of the diaphragm pump, a pressure relief channel 9 is further provided in the pump head 1 to protect the product.

[0052] See also Figure 3 and Figure 7 The pump head 1 is also provided with a pressure relief channel 9 and a pressure blocking chamber 11. One end of the pressure relief channel 9 is connected to the water inlet 71, and the other end has a conducting hole 91. The conducting hole 91 is connected to the pressure blocking chamber 11. The pressure blocking chamber 11 has a pressure hole 111 on one side of the conducting hole 91 and is connected to the water outlet 81. The pressure blocking chamber 11 is provided with an elastic diaphragm 121 and a diaphragm spring 122. The elastic diaphragm 121 is pushed up by the diaphragm spring 122 to block the conducting hole 91 and the pressure hole 111 simultaneously. Therefore, since the water outlet chamber 8 is connected to the water outlet 81, when the pressure in the water outlet chamber 8 is too high, the elastic diaphragm 121 can be lifted up from the pressure hole 111, so that a part of the liquid can flow from the conducting hole 91 to the water inlet 71 through the pressure relief channel 9 to perform pressure relief protection.

[0053] Specifically, the water inlet 71 and the water outlet 81 are respectively arranged on both sides of the top of the pump head 1, and the pressure relief channel 9 is horizontally arranged between the water inlet 71 and the water outlet 81, and the conducting hole 91 is arranged at the top of the pressure relief channel 9; the pressure blocking chamber 11 is recessed on the top surface of the pump head 1, and the bottom of the pressure blocking chamber 11 is vertically opposite to the conducting hole 91 and the pressure hole 111. The top of the pressure blocking chamber 11 is locked and closed by the mounting plate 13, and the diaphragm spring 122 is installed in the pressure blocking chamber 11, and the two ends of the diaphragm spring 122 are respectively against the mounting plate 13 and the elastic diaphragm 121. Therefore, when the pressure of the liquid flowing from the water outlet chamber 8 to the water outlet 81 is too large, the elastic force of the diaphragm spring 122 will be overcome to lift up the elastic diaphragm 121, and then the pressure relief channel 9 will be connected, so that the liquid will flow back to the water inlet 71 for pressure relief protection.

[0054] At the same time, according to the working environment requirements, a one-way valve assembly 10 can be installed on the water outlet 81 so that the liquid at the water outlet 81 can only flow out in one direction and cannot flow back into the diaphragm pump, while maintaining the pressure in the output pipeline.

[0055] Specifically, the one-way valve assembly 10 can be installed on the water outlet channel 14 inside the water outlet 81; the outer peripheral wall of the one-way valve assembly 10 is provided with an annular sealing ring 101, which is sealed with the water outlet channel 14 through the annular sealing ring 101; the inner end of the one-way valve assembly 10 away from the water outlet 81 is also provided with a plurality of radially outwardly protruding elastic hooks 102. In this embodiment, the one-way valve assembly has 4 elastic hooks 102 that are evenly distributed on the outer wall of the inner end of the one-way valve assembly 10 at circumferential intervals; the inner side of the water outlet channel 14 is provided with a radially recessed mounting groove 141.

[0056] Thus, the one-way valve assembly 10 is installed inward from the water outlet 81, and is clamped in the mounting slot 141 inside the water outlet channel 14 by the elastic hook 102. The installation is convenient and fast, and the one-way valve assembly 10 is fixed by the mounting slot 141 so that it cannot move in the water outlet channel 14.

[0057] To sum up, the diaphragm pump and valve seat 6 structure of the utility model can overcome the problem that the water inlet valve plate 641 is difficult to open when sucking viscous liquids by improving the existing fixed structure of the water inlet valve stem 642 into a sliding water inlet valve stem 642. There is no need to increase the current of the motor 5, etc., thus avoiding shortening the life of the motor 5 and increasing the service life of the product. High flow and high pressure can be achieved, and viscous liquids can be extracted.

[0058] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0059] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0060] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0061] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. The valve seat structure of the diaphragm pump is characterized by: The valve seat comprises a water inlet seat and a water outlet seat, the water inlet seat is provided with a water inlet valve, and the water outlet seat is provided with a water outlet valve; The water inlet seat is provided with a mounting hole, and a water inlet hole is provided on one side of the mounting hole; the water inlet valve comprises a connected water inlet valve plate and a water inlet valve stem, the water inlet valve stem is installed in the mounting hole, and the water inlet valve plate is a "bowl plate" shaped structure, which is used to flexibly open and close the water inlet hole; The water inlet valve plate is located on the front of the water inlet seat, and a guide seat is also installed on the back of the water inlet seat, and the guide seat can be reciprocatingly slidably installed in the installation hole; one end of the water inlet valve stem is connected and fixed to the water inlet valve plate, and the other end is passed through and fixed to the middle connection hole of the guide seat in the installation hole; One end of the guide seat away from the water inlet valve plate extends out of the mounting hole and has a radially protruding limiting portion; A compression spring is sleeved on the guide seat, and two ends of the compression spring are respectively against the edge of the mounting hole on the back of the limiting portion and the water inlet seat; A blocking ring is arranged between the compression spring and the edge of the mounting hole.

2. The valve seat structure of the diaphragm pump according to claim 1, characterized in that: The outer wall of the guide seat is loosely matched with the inner wall of the mounting hole; the blocking ring is pressed by the compression spring and is closely attached to the edge of the mounting hole, and the inner edge of the blocking ring is elastically matched with the outer wall of the guide seat.

3. The valve seat structure of the diaphragm pump according to claim 2, characterized in that: An annular mounting convex ring is protruded from the edge of the mounting hole, and an annular groove is concavely provided on the blocking ring, and the annular groove is embedded with the mounting convex ring.

4. The valve seat structure of the diaphragm pump according to claim 1, characterized in that: The middle connecting hole of the guide seat passes through both ends of the guide seat, and the water inlet valve stem passes through the middle connecting hole; the water inlet valve stem is provided with an annular groove, and the middle connecting hole of the guide seat is provided with an annular clamping block, which is clamped in the annular groove.

5. The valve seat structure of the diaphragm pump according to claim 1, characterized in that: The installation hole is arranged in the middle of the water inlet seat, and there are multiple water inlet holes distributed around the installation hole; the water outlet seat is arranged in the middle of the valve seat, and the water inlet seat is arranged on the periphery of the water outlet seat; the water outlet seat is provided with a water outlet hole, and the water outlet valve on the water outlet seat can flexibly open and close the water outlet hole.

6. The valve seat structure of the diaphragm pump according to claim 1, characterized in that: The front side of the water inlet seat and the water inlet valve plate is an arc-shaped concave surface, and the water inlet valve plate is in an inverted "bowl plate" shape to adapt to the arc-shaped concave surface.

7. Diaphragm pump, characterized in that: It includes a pump head, a pump seat, a swing bracket, a diaphragm, a motor and the valve seat structure described in any one of claims 1 to 6; the pump head, pump seat and motor are connected in sequence; the motor is installed under the pump seat, the power output end of the motor is passed through the pump seat and the swing bracket is installed, the valve seat is spaced between the pump head and the pump seat, and is located above the swing bracket; the diaphragm is located between the valve seat and the swing bracket, a water inlet chamber and a water outlet chamber are formed between the pump head and the valve seat, and the pump head is provided with a water inlet connected to the water inlet chamber and a water outlet connected to the water outlet chamber.

8. The diaphragm pump according to claim 7, characterized in that: The valve seat has a circular water outlet area in the middle, which is surrounded by an annular wall protruding from the top of the valve seat; the water outlet area has five water outlet seats equidistantly distributed circumferentially; the outer periphery of the water outlet area has five water inlet seats equidistantly distributed circumferentially, and each water inlet seat is radially opposite to each water outlet seat; the valve seat and the pump head are connected and cooperated, and the water outlet cavity is formed between the inside of the circular water outlet area and the pump head, and the water inlet cavity is formed between the outside of the circular water outlet area and the pump head.

9. The diaphragm pump according to claim 7, characterized in that: The pump head is also provided with a pressure relief channel and a pressure blocking chamber. One end of the pressure relief channel is connected to the water inlet, and the other end is provided with a conducting hole. The conducting hole is connected to the pressure blocking chamber. The pressure blocking chamber has a pressure hole on one side of the conducting hole that is connected to the water outlet. An elastic diaphragm and a diaphragm spring are provided in the pressure blocking chamber. The elastic diaphragm is pushed against by the diaphragm spring to simultaneously block the conducting hole and the pressure hole.

10. The diaphragm pump according to claim 7, characterized in that: A one-way valve assembly is installed on the water outlet channel inside the water outlet; an annular sealing ring is provided on the outer peripheral wall of the one-way valve assembly, which is sealed with the water outlet channel through the annular sealing ring; a plurality of radially outwardly protruding elastic hooks are also provided at the inner end of the one-way valve assembly away from the water outlet, and a radially concave mounting groove is provided on the inner side of the water outlet channel; the one-way valve assembly is installed inward from the water outlet, and is mounted in the mounting groove on the inner side of the water outlet channel by means of the elastic hook.

Images