A novel diaphragm pump with a high-sealing diaphragm assembly

Abstract

A novel diaphragm pump with a high-sealing diaphragm assembly includes a pump body and two diaphragm assemblies. Each diaphragm assembly includes a diaphragm, a first clamping plate, and a second clamping plate. The diaphragm is clamped between the first and second clamping plates. The diaphragm includes an outer retaining ring and two inner retaining rings disposed at both ends of the diaphragm. The first and second clamping plates each include a plurality of first and second blocking grooves facing the diaphragm, and a first and second grooves respectively connected to the two inner retaining rings. The first and second blocking grooves adhere to the diaphragm, thereby forming multiple sealing spaces to impede fluid flow. The first and second grooves are also respectively connected to the inner retaining rings to form a sealed space, further impeding fluid flow and thus improving the sealing performance of the diaphragm pump.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm pump technology, and in particular to a novel diaphragm pump with a high-sealing diaphragm assembly. Background Technology

[0002] A pneumatic diaphragm pump is a positive displacement pump used to transport fluids. Powered by compressed air, it drives a diaphragm. When the diaphragm reaches its limit position, a compressed air reversing valve automatically changes the direction of the compressed air flow, thus changing the direction of the diaphragm's transport and causing it to reciprocate continuously. It is a widely used type of pump.

[0003] However, the flow rate of existing pumps is fixed. Although the flow rate can be increased by increasing the size of structural components, the sealing performance of the diaphragm pump is poor, and leakage is likely to occur during the pumping process, thus affecting the normal operation of the diaphragm pump.

[0004] As shown in the utility model patent with publication number CN220566227U, although the ball seat and the bottom of the pipe are sealed by adding sealing rings and sealing rubber rings, fluid may still pass through the diaphragm assembly and enter the valve chamber during the reciprocating motion of the diaphragm assembly, thus affecting the normal operation of the diaphragm pump. Summary of the Invention

[0005] In view of this, the present invention provides a novel diaphragm pump with a high-sealing diaphragm assembly to solve the above problems.

[0006] A novel diaphragm pump with a high-sealing diaphragm assembly includes a pump body and two diaphragm assemblies disposed within the pump body. The pump body includes a valve chamber assembly comprising a diaphragm bushing connected to the two diaphragm assemblies and two fixing bolts inserted at both ends of the diaphragm bushing. Each diaphragm assembly includes a diaphragm, a first clamping plate located on the side of the diaphragm away from the valve chamber assembly, and a second clamping plate located on the side of the diaphragm closer to the valve chamber assembly. The diaphragm is clamped between the first clamping plate and the second clamping plate, and the diaphragm, the first clamping plate, and the second clamping plate are all annular components. The diaphragm includes a body, an outer retaining ring located on the side of the body facing the first clamping plate, a groove located on the side of the body facing the first clamping plate, and two inner retaining rings disposed at both ends of the body. The first clamping plate includes a first base that conforms to the diaphragm, a plurality of first barrier grooves disposed on the first base facing the diaphragm, and a first groove disposed on the first base facing the diaphragm. The second clamping plate includes a second substrate that adheres to the diaphragm, a plurality of second barrier grooves disposed on the second substrate facing the diaphragm, and a second groove disposed on the second substrate facing the diaphragm. The outer retaining ring is used to impede fluid flow to slow the fluid flow rate, thereby reducing the flow rate through the diaphragm assembly per unit time. The first and second barrier grooves adhere to the body and form a sealed space between them to prevent fluid entry and, once in, to prevent fluid outflow. The inner retaining rings form sealed spaces with the groove and the second groove respectively to impede fluid flow, thereby improving the sealing performance of the diaphragm assembly.

[0007] Furthermore, the pump body also includes two conveying pipe assemblies spaced apart on both sides of the valve chamber assembly, and two cover plate assemblies connected to the valve chamber assembly and the conveying pipe assemblies. The conveying pipe assemblies include a feed pipe disposed on the pump body for feeding material, and a discharge pipe connected to the feed pipe for discharging material.

[0008] Furthermore, the fixing bolt includes a screw that is inserted into the diaphragm bushing, and a screw head fixed to one end of the screw.

[0009] Furthermore, the cover plate assembly includes a first sealing cover integrally formed with the delivery pipe assembly and a second sealing cover fixedly connected to the first sealing cover.

[0010] Furthermore, the diaphragm is sandwiched between the first sealing cap and the second sealing cap, and the diaphragm also includes a body, a groove located on the side of the body away from the valve chamber assembly, and a mounting hole formed on the body for the passage of the fixing bolt.

[0011] Furthermore, the first clamping plate also includes a first through hole located on the first base, and the circumference of the outer ring of the first base is smaller than the circumference of the outer ring of the groove.

[0012] Furthermore, the second clamping plate also includes a second through hole located on the second substrate.

[0013] Furthermore, the axes of the second through hole, the first through hole, and the mounting hole are located on the same straight line.

[0014] Furthermore, the radius of the screw is smaller than the outer ring radius of the diaphragm bushing, and the diaphragm assembly is fixed on one side by the screw head and on the other side by the diaphragm bushing.

[0015] Furthermore, the inner retaining ring is arranged around the mounting hole.

[0016] Compared with existing technologies, the novel diaphragm pump with a high-sealing diaphragm assembly provided by this utility model uses the outer retaining ring to block the fluid, thereby slowing down the fluid flow rate and reducing the fluid flow rate entering the groove, thus lowering the sealing pressure of the diaphragm. Simultaneously, the sealing spaces formed between the groove and the first and second blocking grooves respectively impede the entry and exit of fluid, thereby improving the sealing performance of the diaphragm assembly. Furthermore, the closed space formed between the inner retaining ring and the first and second grooves further impedes the flow of fluid within the diaphragm assembly, further improving the sealing performance. Through the design of this diaphragm assembly, the sealing performance of the diaphragm pump can be improved, enabling the diaphragm pump to operate normally even under high-flow-rate working conditions. Attached Figure Description

[0017] Figure 1 An exploded view of a novel diaphragm pump with a high-sealing diaphragm assembly provided by this utility model.

[0018] Figure 2 for Figure 1 An exploded view of the diaphragm assembly of a novel diaphragm pump with a high-sealing diaphragm assembly.

[0019] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the diaphragm assembly from another direction. Detailed Implementation

[0020] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0021] like Figure 1 and Figure 2 The diagram shown is a structural schematic of a novel diaphragm pump with a high-sealing diaphragm assembly provided by this utility model. The novel diaphragm pump with a high-sealing diaphragm assembly includes a pump body 10 and two diaphragm assemblies 20 disposed within the pump body 10. The novel diaphragm pump with a high-sealing diaphragm assembly also includes other functional modules, such as fasteners and an air source connection assembly connected to the pump body 10, which are technologies known to those skilled in the art and will not be described in detail here.

[0022] like Figure 1 As shown, the pump body 10 is a housing of a well-known pneumatic diaphragm pump, comprising a valve chamber assembly 11, two delivery pipe assemblies 12 spaced apart from the valve chamber assembly 11, and two cover plate assemblies 13 connected to the valve chamber assembly 11 and the delivery pipe assemblies 12. The pump body 10 itself is prior art and should be well known to those skilled in the art; therefore, it will not be described again here.

[0023] The valve chamber assembly 11 is used to drive the diaphragm assembly 20 to move back and forth within the housing, thereby pushing the material entering from the feed pipe 121 out through the discharge pipe 122, thus completing the pump's function. The valve chamber assembly 11 includes a diaphragm bushing 14 connected to both diaphragm assemblies 20, and two fixing bolts 15 inserted at both ends of the diaphragm bushing 14 for fixing the diaphragm assembly 20. It is conceivable that the valve chamber assembly 11 also includes a valve connected to a gas source, which drives the diaphragm assembly 20 to reciprocate, thereby causing the diaphragm bushing 14 to reciprocate; this is prior art and will not be described further here.

[0024] The conveying pipe assembly 12 is used for fluid flow and includes a feed pipe 121 for feeding material onto the pump body 10, and a discharge pipe 122 connected to the feed pipe 121 for discharging material.

[0025] like Figure 1 As shown, each of the cover plate assemblies 13 includes a first sealing cap 131 and a second sealing cap 132 fixedly connected to the first sealing cap 131. The cover plate assembly 13 is used to form a receiving cavity to accommodate functional modules such as the diaphragm assembly 20.

[0026] The first sealing cap 131 is located on the side of the cover plate assembly 13 away from the valve chamber assembly 11. It is a hemispherical shell and is integrally formed with the delivery pipe assembly 12. The first sealing cap 131 is also provided with a plurality of bolt holes for fixing it to the second sealing cap 132.

[0027] The second sealing cap 132 is located on the side of the cover plate assembly 13 near the valve chamber assembly 11. It is a flat, round shell and is fixedly connected to the valve chamber assembly 11. The second sealing cap 132 also has multiple bolt holes for fixed connection with the first sealing cap 131. During assembly, bolts can be passed through the first sealing cap 131 and the second sealing cap 132 sequentially to connect and secure them together.

[0028] The diaphragm bushing 14 has a larger axial radius than the screw 151 described below. Therefore, when the fixing bolt 15 is screwed onto the diaphragm bushing 14, a step is formed between the diaphragm bushing 14 and the screw 151. The step is used to cooperate with the fixing bolt 15 to fix the diaphragm assembly 20.

[0029] The fixing bolt 15 includes a screw 151 that inserts into the diaphragm bushing 14, and a screw head 152 that cooperates with the screw 151 to fix the diaphragm assembly 20 described below. The screw 151 is threadedly connected to the diaphragm bushing 14.

[0030] Two diaphragm assemblies 20 are housed within the space formed by the first sealing cap 131 and the second sealing cap 132. Each diaphragm assembly 20 includes a diaphragm 21 sandwiched between the first sealing cap 131 and the second sealing cap 132, a first clamping plate 22 located on the side of the diaphragm 21 facing the first sealing cap 131, and a second clamping plate 23 located on the side of the diaphragm 21 facing the second sealing cap 132. The diaphragm assembly 20 divides the accommodating space sealed by the cap assembly 13 into two regions. Specifically, the space enclosed by the diaphragm assembly 20 and the first sealing cap 131 is a fluid flow area for the passage of objects to be pumped, such as paint, and the sealed space enclosed by the diaphragm assembly 20 and the second sealing cap 132 is a gas flow area for the passage of gas. The first clamping plate 22 and the second clamping plate 23 are used to prevent fluid from passing through the diaphragm 21 and entering the gas flow area during the pumping process of the diaphragm pump, thereby preventing damage to the gas valve chamber assembly 11 and affecting the normal operation of the diaphragm pump.

[0031] like Figure 2As shown, the diaphragm 21 is used in conjunction with the first clamping plate 22 and the second clamping plate 23 to isolate the fluid flow area from the gas flow area during fluid pumping. The diaphragm 21 is clamped between the first clamping plate 22 and the second clamping plate 23, and includes a body 211, an outer retaining ring 212 located on the side of the body 211 facing the delivery pipe assembly 12, a groove 213 located on the side of the body 211 facing the delivery pipe assembly 12, a mounting hole 214 opened on the body 211, and two inner retaining rings 215 disposed at both ends of the body 211 and surrounding the mounting hole 214.

[0032] The body 211 is a circular ring with a hole in the center for the screw 151 to pass through. Multiple bolt holes are also provided on the outer edge of the body 211. These bolt holes are the same size and shape as those on the first sealing cover 131 and the second sealing cover 132, and their positions correspond to those of the bolt holes, so as to clamp the diaphragm 21 between the first sealing cover 131 and the second sealing cover 132 using bolts. The body 211 is made of an elastic material such as rubber to provide good elasticity, thereby ensuring that the diaphragm 21 remains in constant contact with the first clamping plate 22 and the second clamping plate 23 as it moves with the valve chamber assembly 11.

[0033] The outer retaining ring 212 is used to slow down the flow rate of fluid as it flows through the diaphragm 21. It is an annular protrusion located outside the groove 213. The radial direction of the outer retaining ring 212 is perpendicular to the direction of movement of the valve chamber assembly 11. Specifically, when the fluid flows through the delivery pipe assembly 12, it first impacts the sidewall of the outer retaining ring 212, then gradually rises and finally passes over the outer retaining ring 212 into the groove 213. At this time, the outer retaining ring 212 can create a backflow impact on the fluid during its flow, thereby slowing down its flow rate into the groove 213, thus reducing the fluid flow rate entering the groove 213 per unit time, and consequently reducing the sealing pressure of the diaphragm 21.

[0034] The groove 213 is used to accommodate the first clamping plate 22 and cooperates with the first clamping plate 22 to improve the sealing performance of the diaphragm 21. The groove 213 is an annular groove, and its specific working principle will be described below in conjunction with the first clamping plate 22.

[0035] The mounting hole 214 is used to install the first clamping plate 22 and the second clamping plate 23. The mounting hole 214 also has the function of avoiding the shaft 141. Specifically, the shaft 141 can pass through the mounting hole 214 to connect the diaphragm assembly 20 to the valve chamber assembly 11.

[0036] The inner retaining ring 215 is used to seal the diaphragm assembly 20 by cooperating with the first groove 223 and the second groove 253 described below. It is an annular protrusion provided around the mounting hole 214.

[0037] like Figure 3 As shown, the first clamping plate 22 includes a first base 221 that is attached to the diaphragm 21, a plurality of first barrier grooves 222 disposed on the first base 221 and facing the diaphragm 21, a first groove 223 disposed on the first base 221 and facing the diaphragm 21, and a first through hole 224 located on the first base 221.

[0038] The first substrate 221 is a circular ring, and the radius of the outer ring is smaller than the radius of the outer ring of the groove 213. When fluid enters the groove 213, it needs to pass through the gap between the groove 213 and the first substrate 221 to enter the gas flow area.

[0039] Each of the first barrier grooves 222 is a circular recess, which, together with the recess 213, forms a sealed accommodating space to prevent fluid from passing through the first barrier groove 222, thereby improving the sealing performance of the diaphragm assembly 20. Specifically, the fluid must first enter the accommodating space through the outer wall of the first barrier groove 222, and then flow out of the accommodating space through the other outer wall of the first barrier groove 222 before it can pass through the first barrier groove 222. The first barrier groove 222 can prevent fluid from entering the accommodating space, and can also retain the fluid after it enters the accommodating space, preventing its outflow, thereby hindering its flow and improving the sealing performance of the diaphragm 21. The number of first barrier grooves 222 can be designed according to actual needs. In this embodiment, there are two first barrier grooves 222.

[0040] The first groove 223 is used to cooperate with the inner retaining ring 215 to seal the diaphragm 21 and prevent fluid from passing through. Specifically, the depth of the first groove 223 is equal to the height of the inner retaining ring 215, thereby ensuring that when the inner retaining ring 215 is inserted into the first groove 223, it can just abut against the first groove 223 to form a sealed space between the first groove 223 and the inner retaining ring 215 to block fluid from passing through.

[0041] The first through hole 224 is located at the center of the first base 221 and is used for the shaft 141 to pass through. The first through hole 224 is a circular through hole, and the size of the hole radius of the first through hole 224 is equal to the size of the shaft radius of the shaft 141, that is, the first through hole 224 and the shaft 141 are tightly fitted to prevent fluid from entering the gas flow area through the gap between the first through hole 224 and the shaft 141.

[0042] like Figure 2 As shown, the second clamping plate 23 has the same structure and function as the first clamping plate 22, and the structure of the second clamping plate 23 will not be described in detail here. However, in order to more clearly illustrate the invention, only the composition of the second clamping plate 23 is listed, namely, the second clamping plate 23 includes a second base 251 that is attached to the diaphragm 21, a plurality of second barrier grooves 252 disposed on the second base 251 and facing the diaphragm 21, a second groove 253 disposed on the second base 251 and facing the diaphragm 21, and a second through hole 254 located on the second base 251.

[0043] The number of the second barrier groove 252 is also two.

[0044] The second through hole 254, the first through hole 224, and the mounting hole 214 are all on the same straight line. The radius of the second through hole 254 is smaller than the outer ring radius of the diaphragm sleeve 14, allowing the second clamping plate 23 to abut against the diaphragm sleeve 14. During assembly, the screw 151 is passed through the first through hole 224, the mounting hole 214, and the second through hole 254, and finally inserted into the diaphragm sleeve 14. Then, the screw head 152 is screwed on. When one side of the diaphragm assembly 20 is abutted by the diaphragm sleeve 14 and the other side is abutted by the screw head 152, the diaphragm assembly 20 is fixedly connected to the diaphragm sleeve 14, and the assembly is complete. Through the special design of the diaphragm assembly 20, not only can the sealing performance of the diaphragm pump be improved, but the normal operation of the diaphragm pump can also be ensured under high flow rate operating conditions.

[0045] Compared with existing technologies, the novel diaphragm pump with a high-sealing diaphragm assembly provided by this utility model uses the outer retaining ring 212 to block the fluid, thereby slowing down the fluid flow rate and reducing the fluid flow rate entering the groove 213, thus reducing the sealing pressure of the diaphragm 21. Simultaneously, the sealing spaces formed between the groove 213 and the first and second blocking grooves 241 and 251 respectively hinder the entry and exit of fluid, thereby improving the sealing performance of the diaphragm assembly 20. Furthermore, the closed space formed between the inner retaining ring 215 and the first and second grooves 223 further hinders the flow of fluid within the diaphragm assembly 20, further improving the sealing performance of the diaphragm assembly 20. Through the design of the diaphragm assembly 20, the sealing performance of the diaphragm pump can be improved, enabling the diaphragm pump to operate normally even under high-flow-rate working conditions.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A novel diaphragm pump with a high-sealing diaphragm assembly, characterized in that: The novel diaphragm pump with a high-sealing diaphragm assembly includes a pump body and two diaphragm assemblies disposed within the pump body. The pump body includes a valve chamber assembly, which includes a diaphragm bushing connected to the two diaphragm assemblies and two fixing bolts inserted at both ends of the diaphragm bushing. Each diaphragm assembly includes a diaphragm, a first clamping plate located on the side of the diaphragm away from the valve chamber assembly, and a second clamping plate located on the side of the diaphragm closer to the valve chamber assembly. The diaphragm is clamped between the first and second clamping plates. The diaphragm, the first clamping plate, and the second clamping plate are all annular components. The diaphragm includes a body, an outer retaining ring located on the side of the body facing the first clamping plate, a groove located on the side of the body facing the first clamping plate, and two inner retaining rings disposed at both ends of the body. The first clamping plate includes... The second clamping plate comprises a first substrate that is fitted to the diaphragm, a plurality of first barrier grooves disposed on the first substrate and facing the diaphragm, and a first groove disposed on the first substrate and facing the diaphragm. The second clamping plate comprises a second substrate that is fitted to the diaphragm, a plurality of second barrier grooves disposed on the second substrate and facing the diaphragm, and a second groove disposed on the second substrate and facing the diaphragm. The outer retaining ring is used to impede the flow of fluid to slow down the flow rate of the fluid, thereby reducing the flow rate through the diaphragm assembly per unit time. The first barrier groove and the second barrier groove are fitted to the body and form a sealed space between them to impede the entry of fluid and to impede its exit after the fluid has entered. The inner retaining ring forms a sealed space with the groove and the second groove respectively to impede the flow of fluid, thereby improving the sealing performance of the diaphragm assembly.

2. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 1, characterized in that: The pump body also includes two conveying pipe assemblies spaced apart on both sides of the valve chamber assembly, and two cover plate assemblies connected to the valve chamber assembly and the conveying pipe assemblies. The conveying pipe assembly includes a feed pipe disposed on the pump body for feeding material, and a discharge pipe connected to the feed pipe for discharging material.

3. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 1, characterized in that: The fixing bolt includes a screw that is inserted into the diaphragm bushing, and a screw head fixed to one end of the screw.

4. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 2, characterized in that: The cover plate assembly includes a first sealing cover integrally formed with the delivery pipe assembly and a second sealing cover fixedly connected to the first sealing cover.

5. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 4, characterized in that: The diaphragm is sandwiched between the first sealing cap and the second sealing cap. The diaphragm also includes a body, a groove located on the side of the body away from the valve chamber assembly, and a mounting hole formed on the body for the passage of the fixing bolt.

6. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 5, characterized in that: The first clamping plate also includes a first through hole located on the first base, wherein the radius of the outer ring of the first base is smaller than the radius of the outer ring of the groove.

7. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 6, characterized in that: The second clamping plate also includes a second through hole located on the second base.

8. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 7, characterized in that: The axes of the second through hole, the first through hole, and the mounting hole are located on the same straight line.

9. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 3, characterized in that: The radius of the screw is smaller than the outer ring radius of the diaphragm bushing. One side of the diaphragm assembly is fixed by the screw head, and the other side is fixed by the diaphragm bushing.

10. The novel diaphragm pump with a high-sealing diaphragm assembly as described in claim 5, characterized in that: The inner retaining ring is arranged around the mounting hole.

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