Diaphragm sheet and diaphragm pump

Abstract

The utility model discloses a diaphragm piece and a diaphragm pump, comprising a first diaphragm, a second diaphragm and a third diaphragm, the convex ring is arranged on one end face of the diaphragm body and is close to the edge of the diaphragm body, and the convex ring is annularly arranged in the circumferential direction of the diaphragm body; the end face, provided with the protruding ring, of the diaphragm body is a plane. By the adoption of the structure, the sealing performance of the diaphragm piece after the diaphragm piece is installed on the diaphragm pump can be effectively improved, and the diaphragm piece is simple in structure and convenient to manufacture.

Description

TECHNICAL FIELD

[0001] The utility model relates to diaphragm pump technical field, especially diaphragm piece and diaphragm pump. BACKGROUND

[0002] In the vacuum technical field, diaphragm pump as important vacuum obtaining equipment, is widely used in various industrial occasions. The main working principle of diaphragm pump is through the reciprocating motion of diaphragm piece, changes the working cavity volume, thereby realizes the suction and discharge of fluid. The diaphragm piece that the current market is common, its usually only end surface and the step of pump body are in contact, and the joint of the two may exist gap, and it is easy to produce the problem of poor sealing performance, and leakage occurs.

[0003] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. INVENTION CONTENTS

[0004] The utility model discloses a diaphragm piece and diaphragm pump, improve the sealing performance after being connected with diaphragm pump, and diaphragm piece structure is simple, and convenient to manufacture.

[0005] The utility model discloses a diaphragm piece, including first diaphragm, including:

[0006] Diaphragm body;

[0007] Convex ring, set up in one end surface of diaphragm body, and close to the edge of diaphragm body, the convex ring is along the circumferential ring of diaphragm body and is formed;

[0008] Wherein, the end surface of diaphragm body provided with the convex ring is a plane.

[0009] Further, the end surface of diaphragm body provided with the convex ring is formed with recessed rib structure, and the recessed rib structure is arranged close to the inner edge of the convex ring.

[0010] Further, the diaphragm body, the convex ring and the recessed rib structure are integrally formed, the convex ring is convex on the end surface of the diaphragm body, and the recessed rib structure is formed by recessing inward from the end surface of the diaphragm body provided with the convex ring.

[0011] Further, the recessed rib structure includes recessed rib units, the number of the recessed rib units is multiple, and the recessed rib units are uniformly arranged on the diaphragm body along the circumference of the diaphragm body, and a first reinforcing rib is formed between the two adjacent recessed rib units.

[0012] Further, the diaphragm body is a circular sheet, and the cross section of the recessed rib unit perpendicular to the axial direction of the diaphragm body is a sector with the same axis as the diaphragm body.

[0013] Furthermore, each of the recessed rib units includes a plurality of recessed grooves arranged radially spaced along the diaphragm body. The recessed grooves are fan-shaped grooves coaxial with the diaphragm body, and a second reinforcing rib is formed between two adjacent recessed grooves.

[0014] Furthermore, the area of ​​the recessed groove is smaller the closer it is to the center of the diaphragm body.

[0015] Furthermore, the diaphragm is an adhesive structure composed of at least two layers of membranes.

[0016] Furthermore, the diaphragm also includes a second diaphragm composited on the end face of the diaphragm body opposite to the convex ring, wherein the first diaphragm is made of EPDM or FKM material, and the second diaphragm is made of PTFE material.

[0017] In addition, this utility model also provides a diaphragm pump, comprising:

[0018] The aforementioned diaphragm;

[0019] The pump body has a working chamber inside, and the working chamber has a stepped hole. The stepped surface of the stepped hole is recessed inward to form an annular groove that matches the convex ring.

[0020] Pump head cover, sealing the stepped hole;

[0021] The diaphragm sheet has one end face with the protruding ring that fits into the stepped surface, and the other end face that fits into the pump head cover. The protruding ring is embedded in the annular groove.

[0022] Compared with the prior art, the present invention has the following advantages: By adopting the above structure, the present invention provides a convex ring near the edge of the diaphragm body. When the diaphragm is installed in the diaphragm pump, in addition to the end face of the diaphragm fitting with the diaphragm pump, the convex ring can also be embedded and cooperate with the diaphragm pump, improving the sealing performance at the connection between the two and preventing leakage. In addition, the end face of the diaphragm body is a planar structure, which makes the diaphragm structure simple and easy to manufacture. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the diaphragm sheet of this utility model.

[0024] Figure 2 This is a schematic diagram of the diaphragm sheet of this utility model in another direction.

[0025] Figure 3 This is a schematic diagram of the structure of the diaphragm pump of this utility model.

[0026] Figure 4 yes Figure 3 A magnified view of a portion at point A.

[0027] Reference Signs List:

[0028] 100, diaphragm; 110, first diaphragm; 111, diaphragm body; 112, convex ring; 113, concave rib unit; 114, first reinforcing rib; 115, concave groove; 116, second reinforcing rib; 120, second diaphragm; 200, pump body; 210, working cavity; 211, stepped hole; 212, stepped surface; 213, annular groove; 300, pump head cover. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, and not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0031] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] Please refer to Figure 1 and Figure 2 The diaphragm 100 corresponding to a preferred embodiment of the present application is used for a diaphragm pump. The diaphragm 100 includes a first diaphragm 110, and the first diaphragm 110 includes: a diaphragm body 111; a convex ring 112 disposed on one end surface of the diaphragm body 111 and close to the edge of the diaphragm body 111, the convex ring 112 is annularly arranged along the circumference of the diaphragm body 111; wherein the end surface of the diaphragm body 111 provided with the convex ring 112 is a plane.

[0033] The utility model discloses a membrane body 111 is provided with the convex ring 112 in the position close to the edge, when the diaphragm 100 is installed to the diaphragm pump, in addition to the end surface of diaphragm 100 and the diaphragm pump adhesion, the convex ring 112 can also be embedded with the cooperation of the diaphragm pump, improve the sealing of the junction of both, avoid the leakage, in addition, the end surface of membrane body 111 is the plane structure, make diaphragm 100 simple structure, convenient manufacture.

[0034] Further, the end surface of the membrane body 111 provided with the convex ring 112 is formed with a recessed rib structure, and the recessed rib structure is arranged close to the inner edge of the convex ring 112. By setting the recessed rib structure, the diaphragm 100 is more flexible as a whole, the tensile strength is improved, and wrinkles are prevented. The membrane body 111 is a circular sheet, both end surfaces thereof are flat, and the convex ring 112 is a circular ring arranged along the outer periphery of the membrane body 111. The convex ring 112 and / or the recessed rib structure can be integrally formed with the membrane body 111 or separately formed and then combined together. In the present embodiment, the preferred mode is to be integrally formed, so as to simplify the assembly process and make the first diaphragm 110 more firm. The convex ring 112 is protruded from the end surface of the membrane body 111, and the recessed rib structure is recessed inward from the end surface of the membrane body 111 provided with the convex ring 112 and arranged close to the inner edge of the convex ring 112.

[0035] Further, in an embodiment, the recessed rib structure includes a plurality of recessed rib units 113, which are uniformly arranged on the membrane body 111 along the circumferential direction of the membrane body 111, and a first reinforcing rib 114 is formed between any two adjacent recessed rib units 113. In the present embodiment, the cross section of each recessed rib unit 113 perpendicular to the axial direction of the membrane body 111 is fan-shaped and has the same axis as the membrane body 111. Each recessed rib unit 113 includes a plurality of recessed grooves 115 arranged at intervals along the radial direction of the membrane body 111, and the recessed grooves 115 are fan-shaped grooves having the same axis as the membrane body 111, and a second reinforcing rib 116 is formed between any two adjacent recessed grooves 115. In addition, the area of the recessed groove 115 closer to the center of the membrane body 111 is smaller, so that the recessed rib structure can be adapted to the membrane body 111 to uniformly cover the membrane body 111. Preferably, the plurality of recessed grooves 115 are arranged at equal intervals, and the recessed depth of each recessed groove 115 is the same, so as to ensure that the characteristics of each position of the membrane body 111 at the recessed structure are consistent. In the present embodiment, the end surface of the first reinforcing rib 114 away from the groove bottom of the recessed groove 115 is the end surface of the membrane body 111, which is flat to ensure the tightness after being attached to the diaphragm pump, and the outer contour of the second reinforcing rib 116 is arc-shaped to ensure the structural strength. The coverage area, the recessed depth, the size of the first reinforcing rib 114 and the second reinforcing rib 116 of the recessed structure can be adjusted according to the process, which is not limited in the present utility model.

[0036] Further, the diaphragm sheet 100 is a bonded structure composed of at least two diaphragm sheets, and the composite diaphragm sheet 100 can ensure the advantages of multiple materials. Specifically, in the embodiment, the diaphragm sheet 100 further comprises a second diaphragm sheet 120, which is bonded to the end face of the diaphragm body 111 away from the convex ring 112. The outer edge of the second diaphragm sheet 120 is adapted to the outer edge of the first diaphragm sheet 110, i.e. the outer diameter of the second diaphragm sheet 120 is the same as the outer diameter of the first diaphragm sheet 110. In other embodiments, three, four or more diaphragm sheets can be provided, which are not limited in the utility model.

[0037] In the embodiment, the first diaphragm sheet 110 is made of EPDM or FKM material, which has the characteristics of acid and alkali resistance, high temperature resistance, aging resistance, etc. The second diaphragm sheet 120 is made of PTFE material, which has the characteristics of smooth surface, flatness, no pores, high density, high smoothness and high bending, so that the composite diaphragm sheet 100 has good flexibility, good fatigue resistance, is not easy to peel, delaminate and crack, does not adhere to other materials, can run continuously every day, and has a fatigue life of more than eight months.

[0038] Further, in the embodiment, the thickness of the end face of the diaphragm body 110 away from the second diaphragm sheet 120 to the end face of the second diaphragm sheet 120 away from the diaphragm body 110 is 1.6mm-1.8mm, preferably 1.7mm, and the thickness of the end face of the convex ring 112 away from the diaphragm body 110 to the end face of the second diaphragm sheet 120 away from the diaphragm body 110 is 2.1mm-2.3mm, preferably 2.2mm.

[0039] In addition, with reference to Figure 3 and Figure 4The utility model also provides a diaphragm pump, including preceding diaphragm 100. Diaphragm pump still includes pump body 200 and pump head cover 300. The inside of pump body 200 is formed with working chamber 210, and working chamber 210 is opened with the stepped hole 211 of communicating inside and outside, and pump head cover 300 is capped in stepped hole 211. Stepped hole 211 has step face 212, and step face 212 is inwards recessed and is formed with annular groove 213, and the inner contour of annular groove 213 is adapted with the outer contour of convex ring 112. Diaphragm 100 is equipped with the end face of convex ring 112 and step face 212 is attached, and the other end face is attached with pump head cover 300, and convex ring 112 is embedded in annular groove 213, to effectively improve the sealing property between diaphragm 100 and pump body 200. Preferably, the outer diameter of convex ring 112 is not less than the outer diameter of annular groove 213, and the inner diameter of convex ring 112 is not greater than the inner diameter of annular groove 213, to ensure that convex ring 112 can be closely embedded in annular groove 213. The end face of convex ring 112, which is away from diaphragm body 111, is a plane parallel to the end face of diaphragm 100, and the groove bottom of annular groove 213 is also a plane, to improve the attachment area of the end face of convex ring 112. Indeed, in other embodiments, the end face of convex ring 112 can also be convex with at least one circle of convex parts (not shown in the figure) of the same shaft as diaphragm 100, and the setting of convex parts can make convex ring 112 and annular groove 213 closely press, to further improve the sealing effect.

[0040] The above is only the embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A diaphragm sheet, characterized by, The diaphragm sheet (100) comprises a first diaphragm sheet (110), which comprises: a diaphragm sheet body (111); a convex ring (112) arranged on one end surface of the diaphragm sheet body (111) and close to the edge of the diaphragm sheet body (111), the convex ring (112) being annularly arranged along the circumference of the diaphragm sheet body (111); wherein the end surface of the diaphragm sheet body (111) provided with the convex ring (112) is a plane.

2. The diaphragm of claim 1 wherein, The end surface of the diaphragm sheet body (111) provided with the convex ring (112) is formed with a recessed rib structure, and the recessed rib structure is arranged close to the inner edge of the convex ring (112).

3. The diaphragm of claim 2 wherein, The diaphragm sheet body (111), the convex ring (112) and the recessed rib structure are integrally formed, the convex ring (112) is convexly arranged on the end surface of the diaphragm sheet body (111), and the recessed rib structure is recessed inward from the end surface of the diaphragm sheet body (111) provided with the convex ring (112).

4. The diaphragm of claim 2 wherein, The recessed rib structure comprises a plurality of recessed rib units (113) uniformly arranged on the diaphragm sheet body (111) along the circumference of the diaphragm sheet body (111), and a first reinforcing rib (114) is formed between adjacent two recessed rib units (113).

5. The diaphragm of claim 4 wherein, The diaphragm sheet body (111) is a circular sheet, and the recessed rib unit (113) is a sector with the same axis as the diaphragm sheet body (111) in the axial cross section of the diaphragm sheet body (111).

6. The diaphragm of claim 5 wherein, Each recessed rib unit (113) comprises a plurality of recessed grooves (115) arranged at intervals along the radial direction of the diaphragm sheet body (111), the recessed grooves (115) are sector grooves with the same axis as the diaphragm sheet body (111), and a second reinforcing rib (116) is formed between adjacent two recessed grooves (115).

7. The diaphragm of claim 6 wherein, The area of the recessed groove (115) closer to the center of the diaphragm sheet body (111) is smaller.

8. The diaphragm of claim 1 wherein, The diaphragm sheet (100) is a bonded structure composed of at least two diaphragm sheets.

9. The diaphragm of claim 1 wherein, The diaphragm sheet (100) further comprises a second diaphragm sheet (120) bonded to the end surface of the diaphragm sheet body (111) away from the convex ring (112), the first diaphragm sheet (110) is made of EPDM material or FKM material, and the second diaphragm sheet (120) is made of PTFE material.

10. A diaphragm pump characterized in that, The diaphragm sheet (100) as claimed in any one of claims 1 to 9, a pump body (200) internally formed with a working cavity (210), the working cavity (210) being provided with a stepped hole (211), and a stepped surface (212) of the stepped hole (211) being recessed inward to form an annular groove (213) adapted to the convex ring (112); a pump head cover (300) covering the stepped hole (211); wherein the end surface of the diaphragm sheet (100) provided with the convex ring (112) is attached to the stepped surface (212), the other end surface is attached to the pump head cover (300), and the convex ring (112) is embedded in the annular groove (213). ​

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