Corrosion-resistant diaphragm vacuum pump

Abstract

The utility model provides a corrosion-resistant diaphragm vacuum pump which comprises a shell, an input pipe and an output pipe are installed on the shell, the corrosion-resistant diaphragm vacuum pump further comprises a diaphragm piece, a driving device and a filtering assembly, the diaphragm piece is installed in the shell, the driving device is installed on the diaphragm piece and used for driving the diaphragm piece to move, and the filtering assembly is installed in the input pipe and used for driving the diaphragm piece to move. The filtering assembly is used for filtering impurities in the medium sucked into the shell; wherein a first limiting groove and a second limiting groove are formed in the shell, the first limiting groove is communicated with the input pipe, and the second limiting groove is communicated with the output pipe; the first limiting groove and the second limiting groove are each internally provided with a blocking piece used for sealing the input pipe and the output pipe. The diaphragm pump can solve the problems that when a diaphragm pump in the prior art conveys liquid with many impurities, the impurities easily block the diaphragm pump and damage a diaphragm piece, and the service life of the diaphragm pump is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a corrosion-resistant diaphragm vacuum pump. Background Art

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain a vacuum in a closed space. As a type of vacuum pump, the diaphragm vacuum pump has advanced design, high working efficiency and long service life. It is a replacement product that integrates high-tech. It is mainly used in the fields of medical and pharmaceutical product analysis, fine chemicals, biochemical pharmaceuticals, food inspection, public security and criminal investigation technology. It is a supporting product for its precision chromatographic instruments and one of the necessary equipment in the laboratory.

[0003] The structure of the existing vacuum pump is that the medium directly reaches the outlet of the cylinder head from the cylinder body. The output pulsation of such medium is relatively large, especially when the motor speed is low, which makes the output medium very unstable. In order to solve the problems existing in the prior art, the utility model with publication number CN220909964U discloses a diaphragm pump with a buffer chamber (hereinafter referred to as: prior art 1), which includes a pump body, an inlet cavity, an inlet pipe, an outlet pipe, a motor and a connecting rod assembly. The motor can drive the connecting rod assembly to move in the inlet cavity and output the fluid medium from the outlet pipe. It includes: a buffer module, a buffer cavity is arranged in the buffer module, and the buffer module is connected with the inlet cavity through the buffer cavity; the outlet pipe is connected with the buffer cavity.

[0004] The utility model can stabilize the output flow of the diaphragm pump by adding a buffer module. However, when the diaphragm pump in the prior art transports a liquid with a lot of impurities, the impurities are likely to clog the diaphragm pump during use, and after the impurities enter the pump body, they are likely to damage the diaphragm, thus affecting the service life of the diaphragm pump. Utility Model Content

[0005] The utility model aims to provide a corrosion-resistant diaphragm vacuum pump, which can solve the problem in the prior art that when the diaphragm pump conveys liquid with a lot of impurities, the impurities easily clog the diaphragm pump and damage the diaphragm, thus affecting the service life of the diaphragm pump.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A corrosion-resistant diaphragm vacuum pump comprises a housing, an input pipe and an output pipe are mounted on the housing, and further comprises:

[0008] A diaphragm, wherein the diaphragm is installed in the housing;

[0009] A driving device, which is mounted on the diaphragm and is used to drive the diaphragm to move;

[0010] A filter assembly, the filter assembly is installed in the input pipe, and the filter assembly is used to filter impurities in the medium sucked into the housing;

[0011] Among them, the shell is provided with a first limiting groove and a second limiting groove, the first limiting groove is connected to the input pipe, and the second limiting groove is connected to the output pipe; the first limiting groove and the second limiting groove are both installed with sealing pieces for closing the input pipe and the output pipe.

[0012] Preferably, the driving device includes a connecting part, a partition and a cam assembly, wherein the partition is fixedly connected in the shell, and the connecting part is slidably mounted on the partition; one end of the connecting part is connected to the diaphragm, and the end of the connecting part away from the diaphragm is connected to the cam assembly, and the cam assembly is used to drive the connecting part to move.

[0013] Preferably, the cam assembly includes a cam body, a rotating shaft, a connecting rod and a driving motor. The rotating shaft is rotatably mounted on the shell, and one end of the rotating shaft located in the shell is fixedly connected to the cam body; the driving motor is mounted on the shell, and the output end of the driving motor is connected to the end of the rotating shaft away from the cam body and is used to drive the rotating shaft to rotate; a guide groove is provided on the cam, one end of the connecting rod is rotatably mounted on the connecting part, and the other end of the connecting rod is slidably mounted in the guide groove.

[0014] Preferably, a thread groove is provided on the rotating shaft, and the cam body is detachably connected to the rotating shaft via the thread groove, and the thread rotation direction of the thread groove is opposite to the rotation direction of the rotating shaft.

[0015] Preferably, the filter assembly includes a mounting cylinder and a filter cover, wherein the filter cover is mounted in the mounting cylinder; a branch pipe is connected to the input pipe, and the mounting cylinder is detachably connected to the input pipe.

[0016] Preferably, the filter cover is arranged in a conical structure.

[0017] Preferably, the filter cover is slidably installed in the installation tube, and a cover body is connected to the top of the filter cover, and the cover body is detachably connected to the installation tube.

[0018] Preferably, a cleaning slope is provided on the filter cover.

[0019] Preferably, a sealing ring is connected to the installation cylinder, and the sealing ring is used to seal the gap between the installation cylinder and the cover body.

[0020] Preferably, the diaphragm sheet and the blocking sheet are both made of polytetrafluoroethylene material.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] In the utility model, the external gas and liquid source is connected to the input pipe through the filter assembly, and the filter assembly can filter the impurities in the external gas and liquid entering the input pipe, thereby preventing the impurities from entering the shell and clogging the input pipe and the output pipe, and preventing the impurities from accumulating on the diaphragm and causing damage to the diaphragm, thereby affecting the service life of the diaphragm.

[0023] When the driving device drives the diaphragm to move horizontally back and forth, the volume of the cavity formed between the diaphragm and the shell locks the movement change of the diaphragm; when the volume of the cavity becomes larger, the sealing piece installed in the second limit groove blocks the second limit groove under the action of the shell air pressure, and the sealing piece installed in the first limit groove is lifted upward under the action of the negative pressure suction formed in the shell, so that the medium filtered by the filter component can be sucked into the cavity formed between the shell and the diaphragm; when the volume of the cavity is reduced, the sealing piece installed in the first limit groove blocks the first limit groove under the action of the shell air pressure, and the sealing piece installed in the second limit groove is lifted upward under the action of the negative pressure suction formed in the shell, so that the medium filtered by the filter component can be discharged from the shell through the output pipe, thereby realizing suction work, and the overall structure is simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional diagram of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the utility model.

[0027] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 101-shell, 102-input pipe, 103-output pipe, 104-diaphragm, 105-driving device, 106-filter assembly, 107-first limiting groove, 108-second limiting groove, 109-blocking plate, 110-connecting part, 111-partition, 112-connecting rod, 113-cam assembly, 114-branch pipe, 115-cam body, 116-rotating shaft, 117-through hole, 118-installing cylinder, 119-filter cover, 120-cover body, 121-cleaning slope, 122-drive motor. DETAILED DESCRIPTION

[0030] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 cannot be understood as a limitation on the embodiments of the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0034] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0037] Example

[0038] See also Figure 1-Figure 3 This embodiment discloses a corrosion-resistant diaphragm vacuum pump, including a housing 101, on which an input pipe 102 and an output pipe 103 are installed, and also includes a diaphragm 104, a driving device 105 and a filter assembly 106, wherein the diaphragm 104 is installed in the housing 101, the driving device 105 is installed on the diaphragm 104 and is used to drive the diaphragm 104 to move, and the filter assembly 106 is installed in the input pipe 102, and the filter assembly 106 is used to filter impurities in the medium sucked into the housing 101;

[0039] Among them, a first limiting groove 107 and a second limiting groove 108 are provided on the shell 101, the first limiting groove 107 is connected to the input pipe 102, and the second limiting groove 108 is connected to the output pipe 103; the first limiting groove 107 and the second limiting groove 108 are both installed with a sealing piece 109 for closing the input pipe 102 and the output pipe 103.

[0040] In the present invention, the external gas and liquid source is connected to the input pipe 102 through the filter assembly 106. The filter assembly 106 can filter the impurities in the external gas and liquid entering the input pipe 102, thereby preventing the impurities from entering the shell 101 and clogging the input pipe 102 and the output pipe 103, and also preventing the impurities from accumulating on the diaphragm 104 and causing damage to the diaphragm 104, thereby affecting the service life of the diaphragm 104; when the driving device 105 drives the diaphragm 104 to move horizontally back and forth, the volume of the cavity formed between the diaphragm 104 and the shell 101 locks the movement change of the diaphragm 104; when the volume of the cavity becomes larger, the blocking piece 109 installed in the second limiting groove 108 blocks the second limiting groove 108 under the action of the air pressure of the shell 101, and the blocking piece 109 installed in the first limiting groove 107 is in the shell 101 The filter element 106 is lifted upward by the negative pressure suction force formed, so that the medium filtered by the filter component 106 can be sucked into the cavity formed between the shell 101 and the sealing diaphragm 104; when the volume of the cavity is reduced, the sealing piece 109 installed in the first limiting groove 107 blocks the first limiting groove 107 under the action of the air pressure of the shell 101, and the sealing piece 109 installed in the second limiting groove 108 is lifted upward by the negative pressure suction force formed in the shell 101, so that the medium filtered by the filter component 106 can be discharged from the shell 101 through the output pipe 103, thereby realizing the suction work, and the overall structure is simple and practical; a plurality of through holes 117 are arranged on the shell, and the first limiting groove 107 is respectively connected with the shell 101 and the input pipe 102 through the through holes 117, and the first limiting groove 107 is respectively connected with the shell 101 and the output pipe 103 through the through holes 117.

[0041] Specifically, the driving device 105 includes a connecting part 110, a partition 111 and a cam assembly 113, wherein the partition 111 is fixedly connected in the shell 101, and the connecting part 110 is slidably installed on the partition 111; one end of the connecting part 110 is connected to the diaphragm 104, and the end of the connecting part 110 away from the diaphragm 104 is connected to the cam assembly 113, and the cam assembly 113 is used to drive the connecting part 110 to move. When the cam assembly 113 drives the connecting part 110 to move toward the partition 111, the volume of the cavity between the diaphragm 104 and the shell 101 is reduced, and the sealing piece 109 installed in the first limiting groove 107 blocks the first limiting groove 107 under the action of the air pressure of the shell 101, and the sealing piece 109 installed in the second limiting groove 108 is lifted upward under the action of the negative pressure suction formed in the shell 101; when the cam assembly 113 drives the connecting part 110 to move in the direction away from the partition 111, when the volume of the cavity increases, the sealing piece 109 installed in the second limiting groove 108 blocks the second limiting groove 108 under the action of the air pressure of the shell 101, and the sealing piece 109 installed in the first limiting groove 107 is lifted upward under the action of the negative pressure suction formed in the shell 101, so that the medium filtered by the filter assembly 106 can be sucked into the shell 101.

[0042] Specifically, the cam assembly 113 includes a cam body 115, a rotating shaft 116, a connecting rod 112 and a driving motor 122. The rotating shaft 116 is rotatably mounted on the shell 101, and one end of the rotating shaft 116 located in the shell 101 is fixedly connected to the cam body 115; the driving motor 122 is mounted on the shell 101, and the output end of the driving motor 122 is connected to the end of the rotating shaft 116 away from the cam body 115 and is used to drive the rotating shaft 116 to rotate; a guide groove is provided on the cam, one end of the connecting rod 112 is rotatably mounted on the connecting portion 110, and the other end of the connecting rod 112 is slidably mounted in the guide groove. One end of the connecting rod 112 close to the connecting part 110 is rotatably mounted on the connecting part 110 via a rotating shaft, and one end of the connecting rod 112 away from the connecting part 110 is rotatably mounted with a roller, and the roller is slidably mounted in the guide groove. When the driving motor 122 drives the cam body 115 to rotate, the connecting rod 112 swings under the drive of the guide groove, thereby driving the connecting part 110 to move horizontally back and forth, so that the medium filtered by the filter assembly 106 can be sucked into the shell 101.

[0043] Specifically, the rotating shaft 116 is provided with a thread groove, and the cam body 115 is detachably connected to the rotating shaft 116 via the thread groove, and the thread rotation direction of the thread groove is opposite to the rotation direction of the rotating shaft 116. By making the cam body 115 and the rotating shaft 116 detachably connected, it is convenient to replace the cam body 115 of different sizes according to the actual needs, so as to adjust the moving distance of the connecting part 110 and the pressure in the pump; by making the thread rotation direction of the thread groove and the rotation direction of the rotating shaft 116 consistent, it is possible to prevent the cam body 115 from loosening or falling off when the rotating shaft 116 rotates.

[0044] Specifically, the filter assembly 106 includes a mounting cylinder 118 and a filter cover 119, and the filter cover 119 is mounted in the mounting cylinder 118; the input pipe 102 is connected with a branch pipe 114, and the mounting cylinder 118 is detachably connected to the input pipe 102. The mounting cylinder 118 is threadedly connected to the input pipe 102, and the branch pipe 114 is used to connect with a gas-liquid source. After the gas-liquid medium enters the input pipe 102 through the branch pipe 114, the impurities in the gas are filtered by the filter cover 119 installed in the mounting cylinder 118, and the filtered gas enters the cavity formed between the diaphragm sheet 104 and the housing 101 through the through hole 117 and the first limiting groove 107.

[0045] Specifically, the filter cover 119 is provided in a conical structure. When the fluid passes through the conical filter cover 119, a vortex flow is formed, which increases the contact area with the filter screen, thereby improving the filtering effect.

[0046] Specifically, the filter cover 119 is slidably installed in the installation tube 118, and the top of the filter cover 119 is connected to a cover 120, and the cover 120 is detachably connected to the installation tube. The top of the filter cover 119 is fixedly connected to the cover 120, and the side of the bottom of the filter cover 119 contacts the inner wall of the installation tube 118; the cover 120 is threadedly connected to the top of the installation tube 118. When the filter cover 119 needs to be cleaned or replaced, the filter cover 119 can be taken out of the installation tube 118 by rotating the cover 120.

[0047] Specifically, a cleaning slope 121 is provided on the filter cover 119. By providing the cleaning slope 121, impurities remaining on the inner wall of the installation cylinder 118 can be scraped and cleaned when the cover 120 is pulled to move the filter cover 119 outside the installation cylinder 118.

[0048] Specifically, a sealing ring is connected to the installation cylinder 118, and the sealing ring is used to seal the gap between the installation cylinder 118 and the cover body 120. The sealing ring is made of rubber material, and the sealing ring is bonded to the installation cylinder 118 and used to seal the gap between the installation cylinder 118 and the cover body 120.

[0049] Specifically, the diaphragm 104 and the plugging piece 109 are both made of polytetrafluoroethylene material. The diaphragm 104 and the plugging piece 109 made of polytetrafluoroethylene material have good corrosion resistance and can extend the service life of the diaphragm 104 and the plugging piece 109.

[0050] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A corrosion-resistant diaphragm vacuum pump, comprising a housing (101), an inlet pipe (102) and an outlet pipe (103) being mounted on the housing (101), characterized in that: Also includes: A diaphragm (104), wherein the diaphragm (104) is installed in the housing (101); A driving device (105), wherein the driving device (105) is installed on the diaphragm (104) and is used to drive the diaphragm (104) to move; A filter assembly (106), wherein the filter assembly (106) is installed in the input pipe (102), and the filter assembly (106) is used to filter impurities in the medium sucked into the housing (101); The housing (101) is provided with a first limiting groove (107) and a second limiting groove (108); the first limiting groove (107) is connected to the input pipe (102), and the second limiting groove (108) is connected to the output pipe (103); and blocking pieces (109) for closing the input pipe (102) and the output pipe (103) are installed in the first limiting groove (107) and the second limiting groove (108).

2. A corrosion-resistant diaphragm vacuum pump according to claim 1, characterized in that: The driving device (105) comprises a connecting portion (110), a partition (111) and a cam assembly (113); the partition (111) is fixedly connected in the housing (101); the connecting portion (110) is slidably mounted on the partition (111); one end of the connecting portion (110) is connected to the diaphragm (104); the end of the connecting portion (110) away from the diaphragm (104) is connected to the cam assembly (113); the cam assembly (113) is used to drive the connecting portion (110) to move.

3. A corrosion-resistant diaphragm vacuum pump according to claim 2, characterized in that: The cam assembly (113) comprises a cam body (115), a rotating shaft (116), a connecting rod (112) and a driving motor (122); the rotating shaft (116) is rotatably mounted on the housing (101); one end of the rotating shaft (116) located in the housing (101) is fixedly connected to the cam body (115); the driving motor (122) is mounted on the housing (101); the output end of the driving motor (122) is connected to one end of the rotating shaft (116) away from the cam body (115) and is used to drive the rotating shaft (116) to rotate; a guide groove is provided on the cam; one end of the connecting rod (112) is rotatably mounted on the connecting portion (110), and the other end of the connecting rod (112) is slidably mounted in the guide groove.

4. A corrosion-resistant diaphragm vacuum pump according to claim 3, characterized in that: The rotating shaft (116) is provided with a thread groove, and the cam body (115) is detachably connected to the rotating shaft (116) via the thread groove, and the thread rotation direction of the thread groove is opposite to the rotation direction of the rotating shaft (116).

5. The corrosion-resistant diaphragm vacuum pump according to claim 1, characterized in that: The filter assembly (106) comprises a mounting cylinder (118) and a filter cover (119), wherein the filter cover (119) is mounted in the mounting cylinder (118); a branch pipe (114) is connected to the input pipe (102), and the mounting cylinder (118) is detachably connected to the input pipe (102).

6. A corrosion-resistant diaphragm vacuum pump according to claim 5, characterized in that: The filter cover (119) is arranged in a conical structure.

7. A corrosion-resistant diaphragm vacuum pump according to claim 6, characterized in that: The filter cover (119) is slidably installed in the installation tube (118), and the top end of the filter cover (119) is connected to a cover body (120), and the cover body (120) is detachably connected to the installation tube.

8. The corrosion-resistant diaphragm vacuum pump according to claim 7, characterized in that: A cleaning slope (121) is provided on the filter cover (119).

9. The corrosion-resistant diaphragm vacuum pump according to claim 7, characterized in that: A sealing ring is connected to the installation cylinder (118), and the sealing ring is used to seal the gap between the installation cylinder (118) and the cover body (120).

10. The corrosion-resistant diaphragm vacuum pump according to claim 1, characterized in that: The diaphragm sheet (104) and the blocking sheet (109) are both made of polytetrafluoroethylene material.

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