Current limiting frame for diaphragm pump

Abstract

The utility model provides a current-limiting frame for a diaphragm pump, which comprises a current-limiting frame, the current-limiting frame is arranged in the diaphragm pump, the diaphragm pump is provided with an electric cylinder and a pump head shell connected with the electric cylinder, and a diaphragm rubber part and the current-limiting frame are arranged in the pump head shell; a fixing groove is formed in the side, close to the diaphragm rubber part, of the current limiting frame, the side, close to the current limiting frame, of the diaphragm rubber part is embedded into the fixing groove, a groove face of a plane or cambered surface structure is formed in the position, located on the inner side of the fixing groove, of the current limiting frame, and a sunken water inlet groove and a sunken water outlet groove are formed in the position, located on the groove face, of the current limiting frame. A runner groove is connected between the water inlet groove and the water outlet groove; in addition, compared with an existing flow limiting frame with a step structure at a water outlet groove, water flow is smoother, the water flow cannot be blocked by the step structure, the vacuum degree is improved, and the water pumping and water outlet effects can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, and more specifically, to a current-limiting frame for a diaphragm pump. Background Art

[0002] A diaphragm pump is a pump device that relies on the reciprocating motion of a diaphragm to absorb and drain water, and is widely used in industries such as chemical engineering, medicine, and food. In the design of traditional diaphragm pumps, the structure of the current-limiting frame is usually relatively simple. There is often a step structure at the water outlet on the side of the current-limiting frame close to the diaphragm rubber part, resulting in the water flow being blocked by the step structure and insufficient vacuum during internal compression. In addition, most current-limiting frames and diaphragm rubber parts will come into contact during operation, resulting in noise. Moreover, on the side of the current-limiting frame close to the diaphragm rubber part, there are generally a water outlet and a water inlet, and the water inlet and the water outlet are not connected, so the speed of the water flow from the water inlet to the water outlet is slow, affecting the working efficiency of the diaphragm pump. Content of the Utility Model

[0003] In view of this, the utility model provides a current-limiting frame for a diaphragm pump.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A current-limiting frame for a diaphragm pump includes a current-limiting frame. The current-limiting frame is arranged in the diaphragm pump. The diaphragm pump is provided with an electric cylinder and a pump head housing connected to the electric cylinder. Inside the pump head housing, a diaphragm rubber part and a current-limiting frame are installed. On the side of the current-limiting frame close to the diaphragm rubber part, there is a fixing groove. The side of the diaphragm rubber part close to the current-limiting frame is embedded in the fixing groove. On the current-limiting frame, a groove surface with a flat or arc-shaped structure is formed inside the fixing groove. On the current-limiting frame at the groove surface, a sunken water inlet groove and a water outlet groove are formed. A flow channel groove is connected between the water inlet groove and the water outlet groove. On the side of the current-limiting frame away from the diaphragm rubber part, there is a water outlet communicating with the water outlet groove and a water inlet communicating with the water inlet groove.

[0006] In a preferred technical solution, a water passing slit is connected and arranged between the water inlet and the water inlet groove of the current-limiting frame.

[0007] In a preferred technical solution, the bottom of the diaphragm rubber part is connected to a push rod provided by the electric cylinder to realize up and down telescopic movement. A cavity is formed between the diaphragm rubber part and the groove surface. The telescopic part in the center of the diaphragm rubber part does not contact the groove surface during telescoping.

[0008] In a preferred technical solution, the pump head housing is provided with a water inlet interface connected to the water inlet and a water outlet interface connected to the water outlet.

[0009] In a preferred technical solution, a first one-way joint is provided between the water outlet on the current-limiting frame and the water outlet interface on the pump head housing, and a second one-way joint is provided between the water inlet and the water inlet interface.

[0010] In a preferred technical solution, the water inlet protrudes from the side of the current-limiting frame away from the diaphragm rubber part in a ring structure. The water outlet end of the first one-way joint faces downward and is embedded in the water inlet, and the second one-way joint is arranged in the opposite direction to the first one-way joint.

[0011] It can be seen from the above technical solutions that compared with the prior art, the present utility model has the following beneficial technical effects:

[0012] The current-limiting frame has a groove surface with an arc-shaped or flat structure, and does not fit when telescoping between the rubber diaphragms, avoiding noise when the two come into contact. In addition, compared with the prior current-limiting frame with a stepped structure at the water outlet on the groove surface, the water flow is smoother, the water flow will not be blocked by the stepped structure, the vacuum degree is improved, and the pumping and water outlet effects can be enhanced; a flow channel groove is connected between the water inlet groove and the water outlet groove. The flow channel groove connects the water inlet groove and the water outlet groove so that the three are recessed in the groove surface together. The connected water inlet groove and water outlet groove enable the water flow to pass from the water inlet groove through the water outlet groove faster, the water flow is smoother, and the pumping and water outlet effects are enhanced. At the same time, since the flow channel groove can accommodate the moving water volume, the water storage volume in the cavity can be relatively reduced. Reducing the water storage volume can reduce the deformation amount of the diaphragm rubber part, improve the stability of the diaphragm pump passing through the current, and improve the service life. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0014] Figure 1 It is a schematic cross-sectional structure diagram of a diaphragm pump.

[0015] Figure 2 It is a schematic three-dimensional structure diagram of a current-limiting frame Figure 1 。

[0016] Figure 3 It is a schematic three-dimensional structure diagram of a current-limiting frame Figure 2 。

[0017] Figure 4 It is a schematic three-dimensional structure diagram of a diaphragm pump.

[0018] Attached drawing reference numerals: 100, current-limiting frame; 210, electric cylinder; 220, pump head housing; 230, diaphragm rubber part; 110, fixing groove; 120, groove surface; 121, water inlet groove; 122, water outlet groove; 123, flow channel groove; 130, water outlet; 140, water inlet; 101, water passing hole; 211, push rod; 102, cavity; 221, water inlet interface; 222, water outlet interface; 131, first one-way joint; 141, second one-way joint. Detailed implementation manners

[0019] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0020] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0022] A current-limiting frame for a diaphragm pump, please refer to Figures 1-4, including a current-limiting frame 100, which is provided in a diaphragm pump. The diaphragm pump is provided with an electric cylinder 210 and a pump head housing 220 connected to the electric cylinder 210. The pump head housing 220 is connected to the electric cylinder 210. Inside the pump head housing 220, a diaphragm rubber part 230 and a current-limiting frame 100 are installed. Inside the pump head housing 220, there is a cavity that can accommodate the diaphragm rubber part 230 and the current-limiting frame 100. This cavity is formed by the internal structure of the pump head housing 220 and matches the structures of the diaphragm rubber part 230 and the current-limiting frame 100. On one side of the current-limiting frame 100 close to the diaphragm rubber part 230, there is a fixing groove 110. On one side of the diaphragm rubber part 230 close to the current-limiting frame 100, a convex ring-shaped structure is formed. The diaphragm rubber part 230 is embedded in the fixing groove 110 through this structure to be hermetically connected to the current-limiting frame 100. On the current-limiting frame 100, a groove surface 120 with an arc-shaped structure is formed inside the fixing groove 110. In other embodiments, the groove surface 120 can be a flat structure. When the diaphragm part of the diaphragm rubber part 230 is driven by the electric cylinder 210 to move upward, the space between the two can be compressed, but they do not fit or contact each other, which can reduce the noise generated during operation. In addition, compared with the existing current-limiting frame with a stepped structure on the side close to the diaphragm part, it can make the internal water flow smoother, which is beneficial to increasing the vacuum degree formed when the two cooperate; on the current-limiting frame 100, a concave water inlet groove 121 and a water outlet groove 122 are formed at the groove surface 120. When the diaphragm part inside the diaphragm rubber part 230 is pushed upward, the cavity is compressed, and then when it moves downward, water can be pumped in. Compared with the previous current-limiting frame with a stepped structure at the water outlet groove 122, the water flow will not be blocked by the stepped structure when it is compressed, and the increased vacuum degree can enhance the water pumping and water outlet effects.

[0023] Furthermore, a flow channel groove 123 is connected between the water inlet groove 121 and the water outlet groove 122. On the side of the current limiting frame 100 away from the diaphragm rubber part 230, a water outlet 130 communicating with the water outlet groove 122 and a water inlet 140 communicating with the water inlet groove 121 are provided. The bottom of the diaphragm rubber part 230 is connected to a push rod 211 provided on the electric cylinder 210 to realize up and down telescopic movement; a cavity 102 is formed between the diaphragm rubber part 230 and the groove surface 120, and the telescopic part inside the diaphragm rubber part 230 does not contact the groove surface 120 during telescopic movement. When the electric cylinder 210 works, its push rod 211 moves up and down, and the diaphragm part inside the diaphragm rubber part 230 moves up and down following the push rod 211. After the diaphragm part moves up, the size of the cavity 102 is reduced, but the diaphragm part does not contact the groove surface 120 of the current limiting frame 100 to reduce the noise generated during operation; when the size of the cavity 102 is compressed to the minimum, the cavity 102 becomes larger when the diaphragm part moves down, and water is pumped into the cavity 102. When the diaphragm part moves up again, the water in the cavity 102 can be discharged to the side of the current limiting frame 100 away from the diaphragm rubber part 230 through the water outlet groove 122 and the water outlet 130. When the diaphragm rubber part 230 reciprocates, water pumping and drainage are realized; a flow channel groove 123 is connected between the water inlet groove 121 and the water outlet groove 122. The flow channel groove 123 communicates with the water inlet groove 121 and the water outlet groove 122, so that the three are recessed in the groove surface 120 together. The connected water inlet groove 121 and water outlet groove 122 enable water to flow from the water inlet groove 121 through the water outlet groove 122 faster. At the same time, since the flow channel groove 123 can accommodate the moving water volume, the water storage volume in the cavity 102 can be relatively reduced. The reduced water storage volume can reduce the deformation amount of the diaphragm rubber part 230, improve the stability of the diaphragm pump during water flow and extend the service life.

[0024] Furthermore, a water passing hole 101 is connected and provided between the current limiting frame 100 and the water inlet 140 and the water inlet groove 121. The diameter of the water passing hole 101 is smaller than that of the water inlet groove 121. Under normal circumstances, it is difficult for water to pass through. When the diaphragm part of the rubber diaphragm 230 expands and contracts, the vacuum principle can pump water through the water passing hole 101. The connection between the water inlet 140 and the water inlet groove 121 through the water passing hole 101 can ensure their connection while avoiding reducing the vacuum degree between the current limiting frame 100 and the diaphragm rubber part 230.

[0025] Furthermore, an inlet interface 221 connecting to the water inlet 140 and an outlet interface 222 connecting to the water outlet 130 are provided on the pump head housing 220. Generally, when the diaphragm pump is in use, two water pipes are respectively connected to the outlet interface 222 and the inlet interface 221. The water pipe connected to the inlet interface 221 is connected to an external water source. When the diaphragm pump works, the external water source enters the water inlet 140 through the inlet interface 221 and is then sucked into the cavity 102. Subsequently, the water is pumped out externally through the water outlet 130 and the outlet interface 222. A first one-way joint 131 is provided between the water outlet 130 on the current-limiting frame 100 and the outlet interface 222 on the pump head housing 220, and a second one-way joint 141 is provided between the water inlet 140 and the inlet interface 221. The water inlet 140 protrudes in a ring structure on the side of the current-limiting frame 100 away from the diaphragm rubber part 230. The water outlet end of the first one-way joint 131 faces downward and is embedded in the water inlet 140. The second one-way joint 141 is arranged in the opposite direction to the first one-way joint 131. The water outlet ends of the first one-way joint 131 and the second one-way joint 141 are in a conical structure, and the two are arranged in the opposite direction. When the diaphragm pump sucks water, the external water source can enter through the first one-way joint 131, and due to the action of the second one-way joint 141, the water pumped out cannot be sucked back at the water outlet 130. On the contrary, when the diaphragm rubber part 230 is pushed towards the current-limiting frame 100, the water can be pumped out of the outlet interface 222 through the water outlet 130 and cannot flow back to the inlet interface 221 through the first one-way joint 131, ensuring the normal operation of the diaphragm pump.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flow-limiting frame for a diaphragm pump, comprising a flow-limiting frame (100), the flow-limiting frame (100) being provided in the diaphragm pump, the diaphragm pump being provided with an electric cylinder (210) and a pump head housing (220) connected to the electric cylinder (210), and a diaphragm rubber member (230) and the flow-limiting frame (100) being installed inside the pump head housing (220); characterized in that: On one side of the current-limiting frame (100) close to the diaphragm rubber part (230), there is a fixing groove (110). The side of the diaphragm rubber part (230) close to the current-limiting frame (100) is embedded in the fixing groove (110). On the current-limiting frame (100) inside the fixing groove (110), there is a groove surface (120) with a flat or arc-shaped structure. On the current-limiting frame (100) at the groove surface (120), there are formed a sunken water inlet groove (121) and a water outlet groove (122). Between the water inlet groove (121) and the water outlet groove (122), there is a flow channel groove (123) connected. On the side of the current-limiting frame (100) away from the diaphragm rubber part (230), there is a water outlet (130) communicating with the water outlet groove (122) and a water inlet (140) communicating with the water inlet groove (121).

2. The current-limiting frame for a diaphragm pump according to claim 1, wherein: Between the water inlet (140) and the water inlet groove (121) on the current-limiting frame (100), there is a water passing hole (101) communicated.

3. The current-limiting frame for a diaphragm pump according to claim 1, characterized in that: The bottom of the diaphragm rubber part (230) is connected to a push rod (211) of the electric cylinder (210) to realize up-and-down telescopic movement. Between the diaphragm rubber part (230) and the groove surface (120), there is a cavity (102). The telescopic part inside the diaphragm rubber part (230) does not contact the groove surface (120) during telescopic movement.

4. The current-limiting frame for a diaphragm pump according to claim 1, characterized in that: On the pump head housing (220), there is a water inlet interface (221) connected to the water inlet (140) and a water outlet interface (222) connected to the water outlet (130).

5. The current-limiting frame for a diaphragm pump according to claim 4, wherein: Between the water outlet (130) on the current-limiting frame (100) and the water outlet interface (222) on the pump head housing (220), there is a first one-way joint (131). Between the water inlet (140) and the water inlet interface (221), there is a second one-way joint (141).

6. The current-limiting frame for a diaphragm pump according to claim 5, characterized in that: The water inlet (140) protrudes in a ring structure on the side of the current-limiting frame (100) away from the diaphragm rubber part (230). The water outlet end of the first one-way joint (131) faces downward and is embedded in the water inlet (140). The second one-way joint (141) is arranged in the opposite direction to the first one-way joint (131).

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