A diaphragm pump capable of sucking viscous liquids

Abstract

A diaphragm pump capable of sucking viscous liquids comprises a valve seat, the valve seat having a water inlet seat, a water inlet hole arranged in the water inlet seat, a water inlet valve installed on the water inlet seat, the water inlet valve having a water inlet valve plate for shielding the water inlet hole; the water inlet seat is concave to form a water inlet groove, the water inlet hole is concavely arranged in the water inlet groove, and at least one convex rib is protruded in the water inlet groove; the water inlet valve plate is in the shape of an arched bowl, the arched shape of the water inlet valve plate matches the shape of the concave water inlet groove, and the main body of the water inlet valve plate is movably in contact with the convex rib but not completely in contact with the water inlet groove; the outer edge of the main body of the water inlet valve plate has a circle of movably sealed edge sealing parts that are in contact with the outer periphery of the water inlet groove; the water inlet valve plate is made of elastic deformable material. The contact area between the water inlet valve plate and the water inlet groove is reduced by the raised convex rib, and because the water inlet valve is elastic, it can rebound when contacting the convex rib, thereby greatly reducing the stress when opening the water inlet valve, making it convenient to open the water inlet hole when sucking viscous liquids.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm pumps, in particular to a diaphragm pump capable of sucking viscous liquids. Background Art

[0002] The diaphragm pump is a new type of conveying machinery, usually including a pump head, a pump seat, a valve seat, a diaphragm, a swing bracket, a 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 realize agricultural irrigation automation.

[0003] However, the valve seat and water inlet valve of the common diaphragm pumps on the market are tightly matched. When pumping viscous liquids, the viscous liquid causes the valve seat and the water inlet valve to be tightly adsorbed, resulting in excessive stress, which causes the water pump to be in an idling state. This results in insufficient suction when the diaphragm pump is pumping relatively viscous liquid fertilizers. The common solution is to increase the power of the motor to increase the flow rate and suction pressure to improve the flowability 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 reduced service life of the diaphragm pump, requiring frequent replacement and maintenance, and increasing costs. Summary of the invention

[0004] The object of the present invention is to provide a diaphragm pump capable of sucking viscous liquids, which has the advantages of extending the service life of the diaphragm pump and reducing the use cost.

[0005] In order to achieve the above object, the solution of the present invention is:

[0006] A diaphragm pump capable of sucking viscous liquids comprises a valve seat, the valve seat having a water inlet seat, a water inlet hole being arranged in the water inlet seat, a water inlet valve being installed on the water inlet seat, and the water inlet valve having a water inlet valve sheet for covering the water inlet hole;

[0007] The water inlet seat is concave to form a water inlet groove, the water inlet hole is concavely arranged in the water inlet groove, and at least one convex rib is protruded in the water inlet groove;

[0008] The water inlet valve plate is in the shape of an arched bowl, the arched shape of the water inlet valve plate matches the shape of the sunken water inlet groove, and the main body of the water inlet valve plate movably abuts against the convex rib but is not completely close to the water inlet groove;

[0009] The outer edge of the main body of the water inlet valve plate has a circle of edge sealing parts that are movable and tightly sealed against the outer periphery of the water inlet groove;

[0010] The water inlet valve plate is made of elastic deformable material.

[0011] Furthermore, the water inlet groove is spherical, and the water inlet valve plate is a spherical arch; the spherical radius of the water inlet valve plate is greater than the spherical radius of the water inlet groove.

[0012] Furthermore, the convex rib extends linearly along the depressed middle of the water inlet groove toward the edge, and the inner end of the convex rib close to the depressed middle protrudes out of the water inlet groove, while the outer end of the convex rib away from the depressed middle smoothly transitions and connects to the water inlet groove.

[0013] Furthermore, the water inlet groove of the water inlet seat is provided with at least two water inlet holes which are equally spaced around the middle of the depression; there are at least two convex ribs, each convex rib is equally spaced around the circumference and is located between adjacent water inlet holes.

[0014] Furthermore, the water inlet holes penetrate through both sides of the valve seat, and there are separation ribs between adjacent water inlet holes; and the convex ribs protrude from the separation ribs.

[0015] Furthermore, the convex rib is centered in the middle of the dividing rib, the width of the convex rib is 40%-60% of the width of the dividing rib, and the protruding height of the convex rib is 40%-60% of the thickness of the water inlet valve plate.

[0016] Furthermore, with the depressed center of the water inlet groove as the center of the circle, the inner diameter of the inner end of the convex rib is 40%-60% of the maximum outer diameter of the water inlet groove, and the outer diameter of the outer end of the convex rib is 70%-90% of the maximum outer diameter of the water inlet groove.

[0017] Furthermore, the water inlet valve plate is made of rubber; the water inlet valve also has a connecting valve stem located at the arched top of the water inlet valve plate, and the connecting valve stem is passed through and fixed in a mounting hole set in the middle of the water inlet groove.

[0018] Furthermore, the mounting hole passes through both sides of the valve seat; one end of the connecting valve stem is connected to the water inlet valve plate, and the other end passes through the mounting hole and has a clamping portion, which is clamped to a side of the mounting hole away from the water inlet groove.

[0019] Furthermore, it also includes a pump head and a pump body; the pump head, valve seat and pump body are connected in sequence; a water inlet cavity and a water outlet cavity are formed between the pump head and the valve seat, the pump head has a water inlet connected to the water inlet cavity and a water outlet connected to the water outlet cavity, and a working cavity is formed between the valve seat and the diaphragm of the pump body;

[0020] The valve seat has a water outlet area in the middle; the water outlet area has a plurality of water outlet seats equidistantly distributed in the circumferential direction, and a water outlet valve plate is provided on the water outlet seat; the periphery of the water outlet area has a plurality of water inlet seats equidistantly distributed in the circumferential direction; the valve seat and the pump head are connected and cooperated, the water outlet cavity is formed between the water outlet area and the pump head, and the water inlet cavity is formed between the outside of the water outlet area and the pump head.

[0021] After adopting the above technical scheme, by utilizing the raised ribs on the water inlet groove of the valve seat, on the one hand, the contact area between the water inlet valve plate and the water inlet groove is reduced; on the other hand, since the water inlet valve is elastic, it can rebound when contacting the ribs, thereby greatly reducing the stress when opening the water inlet valve, making it convenient to open the water inlet hole when pumping viscous liquids, avoiding the idling of the motor, eliminating the need for excessive motor power, reducing current and heat, and increasing the life of the motor. As a result, the diaphragm pump using the valve seat can have a better service life, thereby achieving the purpose of reducing the cost of use.

[0022] When the water inlet hole needs to be sealed, since the edge sealing portion of the outer edge of the water inlet valve plate does not contact the convex rib, it can still be sealed and fitted to the outer periphery of the water inlet groove to achieve blocking of the inner water inlet hole and prevent liquid backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an exploded schematic diagram of an embodiment of the present invention;

[0024] Figure 2 A three-dimensional diagram of a valve seat according to an embodiment of the present invention;

[0025] Figure 3 An exploded view of a valve seat according to an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional view of a valve seat according to an embodiment of the present invention;

[0027] Figure 5 is a cross-sectional exploded view of a valve seat according to an embodiment of the present invention;

[0028] Figure 6 This is a bottom view of the valve seat according to an embodiment of the present invention, with the water outlet valve and the water inlet valve hidden.

[0029] Explanation of reference numerals: valve seat 1, water inlet seat 11, water inlet hole 111, water inlet groove 112, convex rib 113, separating rib 114, mounting hole 115, water inlet valve 12, water inlet valve plate 121, edge sealing portion 1211, connecting valve stem 122, clamping portion 1221, water outlet area 13, water outlet seat 14, water outlet valve plate 15, pump head 2, water inlet 21, water outlet 22, pump body 3, diaphragm 31, pump seat 32, motor 33, inner end inner diameter R1, outer end outer diameter R2, maximum outer diameter R3. DETAILED DESCRIPTION

[0030] 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.

[0031] like Figure 1 As shown, a diaphragm pump capable of sucking viscous liquids in this embodiment includes a valve seat 1, a pump head 2 and a pump body 3.

[0032] The pump head 2, valve seat 1 and pump body 3 are connected in sequence; a water inlet chamber and a water outlet chamber (not shown) are formed between the pump head 2 and the valve seat 1, the pump head 2 has a water inlet 21 connected to the water inlet chamber and a water outlet 22 connected to the water outlet chamber, and a working chamber (not shown) is formed between the valve seat 1 and the diaphragm 31 of the pump body 3; the pump body 3 may also include a pump seat 32, a diaphragm 31, a swing bracket (not shown), a motor 33, etc.; the motor 33 in the pump body 3 drives the swing bracket to rotate, and the rotation of the swing bracket can drive the diaphragm 31 to move, thereby forming a negative pressure in the working chamber, which can realize the pumping function of the liquid by pumping water from the water inlet chamber and then sending it into the water outlet chamber after passing through the working chamber. The above structure can adopt the existing technology.

[0033] For example Figures 2 to 6 As shown, the main improvement of this embodiment lies in the valve seat 1, which has a water inlet seat 11, a water inlet hole 111 is provided in the water inlet seat 11, a water inlet valve 12 is installed on the water inlet seat 11, and the water inlet valve 12 has a water inlet valve plate 121 for shielding the water inlet hole 111; the water inlet seat 11 is recessed to form a water inlet groove 112, the water inlet hole 111 is recessed in the water inlet groove 112, and at least one convex rib 113 is protruded in the water inlet groove 112; the water inlet valve plate 111 is recessed to form a water inlet groove 112, and at least one convex rib 113 is protruded in the water inlet groove 112; 21 is in the shape of an arched bowl, the arched shape of the water inlet valve plate 121 matches the shape of the concave water inlet groove 112, and the main body of the water inlet valve plate 121 movably abuts against the rib 113 but is not completely close to the water inlet groove 112; the outer edge of the main body of the water inlet valve plate 121 has a circle of edge sealing portion 1211 that is movably sealed and close to the outer periphery of the water inlet groove 112; the water inlet valve plate 121 is made of elastic deformable material, usually made of rubber.

[0034] Thus, when extracting viscous liquid, since the water inlet valve plate 121 of the water inlet valve 12 is in the shape of an arched bowl, it will be tightly attached to the water inlet groove 112 of the traditional valve seat when sealing, so the stress generated is too large, and the water inlet valve plate 121 will be absorbed by the viscous liquid, causing the diaphragm pump to run idle all the time; and the present embodiment utilizes the raised ribs 113 on the water inlet groove 112 of the valve seat 1 to reduce the contact area between the water inlet valve plate 121 and the water inlet groove 112 on the one hand, and on the other hand, since the water inlet valve 12 is elastic, it can rebound when contacting the ribs 113, thereby greatly reducing the stress when opening the water inlet valve 12, so that when pumping viscous liquid, the water inlet hole 111 can be easily opened, and the idling of the motor 33 can be avoided, and the motor 33 does not need excessive power, which can reduce the current and heat and increase the life of the motor 33. Therefore, the diaphragm pump using the valve seat 1 can have a better service life.

[0035] When the water inlet hole 111 needs to be sealed, since the edge sealing portion 1211 of the outer edge of the water inlet valve plate 121 does not contact the rib 113, it can still be sealed to the outer periphery of the water inlet groove 112 to seal the inner water inlet hole 111 and prevent liquid backflow.

[0036] like Figure 1 and Figure 2 In this embodiment, the valve seat 1 has a water outlet area 13 in the middle; the water outlet area 13 has a plurality of water outlet seats 14 equidistantly distributed in the circumferential direction, and a water outlet valve plate 15 is provided on the water outlet seat 14; the outer periphery of the water outlet area 13 has a plurality of water inlet seats 11 equidistantly distributed in the circumferential direction; in this embodiment, five water outlet seats 14 and five water inlet seats 11 are used as examples to provide a large flow suction function.

[0037] The valve seat 1 and the pump head 2 are connected and matched, and the water outlet cavity is formed between the inside of the water outlet area 13 and the pump head 2 , and the water inlet cavity is formed between the outside of the water outlet area 13 and the pump head 2 .

[0038] See also Figures 3 to 5 The water inlet groove 112 may be spherical, and the water inlet valve plate 121 may be a spherical arch; the spherical radius of the water inlet valve plate 121 is slightly larger than the spherical radius of the water inlet groove 112 .

[0039] See also Figure 6 In this embodiment, the convex rib 113 extends linearly along the depressed middle part of the water inlet groove 112 toward the edge. In this embodiment, the water inlet groove 112 has a plurality of convex ribs 113 , and each convex rib 113 is radially arranged with the depressed middle part of the water inlet groove 112 as the center.

[0040] The inner end of the rib 113 near the middle of the depression protrudes out of the water inlet groove 112, while the outer end of the rib 113 away from the middle of the depression smoothly transitions to connect to the water inlet groove 112 to ensure a good sealing effect of the edge sealing portion 1211 at the outer edge of the water inlet valve plate 121.

[0041] The water inlet groove 112 of the water inlet seat 11 may be provided with at least two water inlet holes 111 equidistantly spaced around the middle of the depression; in this embodiment, twelve water inlet holes 111 are provided in the water inlet groove 112 of each water inlet seat 11 .

[0042] There can be at least two convex ribs 113, each convex rib 113 is evenly spaced in the circumferential direction and is located between adjacent water inlet holes 111. Six convex ribs 113 are arranged in each water inlet seat 11 of this embodiment.

[0043] Specifically, the water inlet holes 111 pass through both sides of the valve seat 1, and there are separation ribs 114 between adjacent water inlet holes 111; the convex ribs 113 protrude from the separation ribs 114. In addition, the convex ribs 113 may be centered in the middle of the separation ribs 114, the width of the convex ribs 113 is 40%-60% of the width of the separation ribs 114, preferably 47%, and the protruding height of the convex ribs 113 (i.e., the protruding height of the inner end of the convex ribs 113) is 40%-60% of the thickness of the water inlet valve plate 121, preferably 43%.

[0044] The depressed center of the water inlet groove 112 is taken as the center of the circle; the inner end inner diameter R1 of the rib 113 may be 40%-60% of the maximum outer diameter R3 of the water inlet groove 112, preferably 48%, and the outer end outer diameter R2 of the rib 113 may be 70%-90% of the maximum outer diameter R3 of the water inlet groove 112, preferably 80%.

[0045] The parameters of the rib 113 structure are the best values ​​obtained through laboratory testing using multiple samples, which can achieve the effect of smoothly sucking viscous liquids. The specific experimental data are shown in Table 1 below. During the experiment, fluid fertilizer was used for testing:

[0046] Table 1

[0047]

[0048] In this embodiment, the water inlet valve 12 further comprises a connecting valve stem 122 located at the top of the arch of the water inlet valve plate 121, and the connecting valve stem 122 is passed through and fixed in a mounting hole 115 provided in the middle of the water inlet groove 112. Of course, the water inlet valve plate 121 can also be mounted and fixed to the water inlet seat 11 in other mounting methods as long as the operation of the water inlet valve plate 121 is not affected.

[0049] Specifically, the mounting hole 115 passes through both sides of the valve seat 1; one end of the connecting valve stem 122 is connected to the water inlet valve plate 121, and the other end passes through the mounting hole 115 and has a clamping portion 1221, which is clamped on the side of the mounting hole 115 away from the water inlet groove 112. The connecting valve stem 122 and the clamping portion 1221 are provided to quickly and conveniently install the water inlet valve 12.

[0050] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the present invention should still belong to the protection scope of the present invention.

[0051] 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.

Claims

1. A diaphragm pump capable of sucking viscous liquids, comprising a valve seat, the valve seat having a water inlet seat, a water inlet hole being arranged in the water inlet seat, a water inlet valve being mounted on the water inlet seat, and the water inlet valve having a water inlet valve plate for shielding the water inlet hole; characterized in that: The water inlet seat is concave to form a water inlet groove, the water inlet hole is concavely arranged in the water inlet groove, and a convex rib is protruded in the water inlet groove; the convex rib extends linearly along the concave middle part of the water inlet groove to the edge, and the inner end of the convex rib close to the concave middle part protrudes out of the water inlet groove, while the outer end of the convex rib away from the concave middle part smoothly transitions and connects to the water inlet groove; The water inlet valve plate is in the shape of an arched bowl, the arched shape of the water inlet valve plate matches the shape of the sunken water inlet groove, and the main body of the water inlet valve plate movably abuts against the convex rib but is not completely close to the water inlet groove; The outer edge of the main body of the water inlet valve plate has a circle of edge sealing parts that are movable and tightly sealed against the outer periphery of the water inlet groove; The water inlet valve plate is made of elastic deformable material; The water inlet groove of the water inlet seat is provided with at least two water inlet holes spaced equally in the circumferential direction around the middle of the depression; There are at least two convex ribs, each convex rib is radially distributed at equal intervals in the circumferential direction with the middle of the depression of the water inlet groove as the center, and is located between adjacent water inlet holes; The water inlet holes pass through both sides of the valve seat, and there are separation ribs between adjacent water inlet holes; The convex rib is centrally protruded in the middle of the dividing rib, the width of the convex rib is 40%-60% of the width of the dividing rib, and the height of the convex rib is 40%-60% of the thickness of the water inlet valve plate; The center of the depression of the water inlet groove is taken as the center of the circle; the inner diameter of the inner end of the convex rib is 40%-60% of the maximum outer diameter of the water inlet groove, and the outer diameter of the outer end of the convex rib is 70%-90% of the maximum outer diameter of the water inlet groove.

2. A diaphragm pump capable of sucking viscous liquid according to claim 1, characterized in that: The water inlet groove is spherical, and the water inlet valve plate is spherically arched; the spherical radius of the water inlet valve plate is greater than the spherical radius of the water inlet groove.

3. A diaphragm pump capable of sucking viscous liquid according to claim 1, characterized in that: The water inlet valve plate is made of rubber; the water inlet valve also has a connecting valve stem located at the arched top of the water inlet valve plate, and the connecting valve stem is passed through and fixed in a mounting hole provided in the middle of the water inlet groove.

4. A diaphragm pump capable of sucking viscous liquid according to claim 3, characterized in that: The mounting hole passes through both sides of the valve seat; one end of the connecting valve stem is connected to the water inlet valve plate, and the other end passes through the mounting hole and has a clamping portion, which is clamped on a side of the mounting hole away from the water inlet groove.

5. The diaphragm pump capable of sucking viscous liquid according to claim 1, characterized in that: It also includes a pump head and a pump body; the pump head, valve seat and pump body are connected in sequence; a water inlet cavity and a water outlet cavity are formed between the pump head and the valve seat, 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, and a working cavity is formed between the valve seat and the diaphragm of the pump body; The valve seat has a water outlet area in the middle; the water outlet area has a plurality of water outlet seats equidistantly distributed in the circumferential direction, and a water outlet valve plate is provided on the water outlet seat; the periphery of the water outlet area has a plurality of water inlet seats equidistantly distributed in the circumferential direction; the valve seat and the pump head are connected and cooperated, the water outlet cavity is formed between the water outlet area and the pump head, and the water inlet cavity is formed between the outside of the water outlet area and the pump head.

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