Cylinder body structure for vacuum pump and vacuum pump

Abstract

The cylinder body structure for the vacuum pump comprises a cylinder body main body, the cylinder body main body comprises a target end face, the target end face is used for being connected with a connecting end face of an opponent piece in an abutting mode, and the cylinder body structure is simple and reasonable in structure, convenient to install and use and low in machining and manufacturing cost. The groove is formed in the end face of the cylinder body, and the sealing piece is arranged in the groove, so that the sealing performance of the connecting position of the opposite ends of the cylinder body and the crankcase can be greatly improved. Meanwhile, the structure is easy to machine and form, original parts are slightly changed, and excessive machining and manufacturing cost cannot be increased. In addition, the normal function of each channel of the cylinder body cannot be affected by the arrangement of the grooves and the sealing pieces. By using the structure, the sealing performance of the vacuum pump can be greatly improved, and the purpose of improving the safety in the production process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum pump accessory technical field, especially a kind of cylinder structure and vacuum pump for vacuum pump. BACKGROUND

[0002] WLW-2400B reciprocating vertical oil-free vacuum pump is the product of Jiangsu Yatex Industrial Pump Technology Development Co., Ltd., which adopts unique V-shaped structure, has beautiful appearance, compact structure and small floor area; meanwhile, significant improvements have been made in the connection mode of key components such as machine body slide, lubrication system, air valve arrangement, air pipe arrangement, which improves the reliability of the whole machine, reduces the maintenance workload and reduces the maintenance cost after long-term operation. It is mainly used in vacuum conveying, lifting, refining, distillation, concentration, pressure swing adsorption, vacuum packaging, drying and other occasions in the fields of petroleum, medicine, pesticide, chemical industry, food, light industry, metallurgy and electricity.

[0003] In the prior art, the cylinder body of WLW-2400B reciprocating vertical oil-free vacuum pump is connected with cylinder cover, cylinder body and crankcase at both ends. Since the connecting parts of the cylinder body and the crankcase are connected by surface contact, the machining precision of the end surface of the cylinder body and the end surface of the counterpart is usually improved to ensure the air tightness of the connecting part.

[0004] However, this connection mode may cause gas leakage from the connecting part during long-term high-temperature operation of the vacuum pump, especially when the vacuum pump is used to transport high-temperature and high-pressure gas (carbon monoxide), gas leakage often occurs at the connecting part of the cylinder body and the crankcase, which brings great safety hazards to daily production. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a cylinder body structure for vacuum pump and a vacuum pump to overcome the above problems or at least partially solve the above problems. The problem of gas leakage at both ends of the cylinder body of traditional WLW-2400B reciprocating oil-free vacuum pump is solved.

[0006] The utility model provides the following scheme:

[0007] A cylinder body structure for vacuum pump, comprising:

[0008] A cylinder body, which comprises a target end surface for abutting connection with the connecting end surface of the counterpart;

[0009] Wherein, the target end surface is provided with a sink groove extending in the circumferential direction at the outer edge; the inside of the sink groove is used to set a sealing element, which is used to form a sealing structure between the target end surface and the connecting end surface after abutting.

[0010] Preferably, the sealing member comprises a deformable sealing member, and after the target end surface abuts against the connecting end surface, the deformable sealing member deforms under pressure to make the target end surface tightly contact with the connecting end surface.

[0011] Preferably, the deformable sealing member comprises any one of a bellows and a sealing ring.

[0012] Preferably, the sealing member comprises an O-shaped sealing ring.

[0013] Preferably, the O-shaped sealing ring is made of fluorine rubber or polytetrafluoroethylene.

[0014] Preferably, the width of the groove is 3.2-3.7 mm, and the depth of the groove is 2.4-3.0 mm.

[0015] Preferably, the width of the groove is 3.5 mm, and the depth of the groove is 2.9 mm.

[0016] Preferably, the target end surface comprises a cylinder head surface, and the counterpart comprises a cylinder head.

[0017] Preferably, the target end surface comprises a cylinder base surface, and the counterpart comprises a crankcase.

[0018] A vacuum pump comprising the cylinder structure for vacuum pump.

[0019] According to the specific embodiments of the utility model, the utility model discloses the following technical effects:

[0020] The cylinder structure for vacuum pump and the vacuum pump provided by the embodiments of the application have simple and reasonable structure, are convenient to install and use, and are low in processing and manufacturing cost. The recess is arranged on the end surface of the cylinder, and the sealing member is arranged in the recess, so that the sealing property of the end-to-end connecting portion of the cylinder and the counterpart can be greatly improved. The structure is easy to process and form, and the original components are slightly changed, so that the processing and manufacturing cost is not increased. In addition, the recess and the sealing member do not affect the normal functions of the channels of the cylinder. The use of the structure can greatly improve the sealing property of the vacuum pump, and the safety in the production process is improved.

[0021] Of course, implementing any product of the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0023] Figure 1 is a structure schematic view of a cylinder body structure for a vacuum pump provided by the embodiment of the present application;

[0024] Figure 2 is a partial enlarged schematic view of A provided by the embodiment of the present application;

[0025] Figure 3 is a partial enlarged schematic view of B provided by the embodiment of the present application;

[0026] Figure 4 is a structure schematic view of a target end face as a cylinder cover face provided by the embodiment of the present application;

[0027] Figure 5 is a structure schematic view of a target end face as a cylinder base face provided by the embodiment of the present application.

[0028] In the figure: cylinder body 1, target end face 11, sink groove 12, sealing element 2. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0030] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , a cylinder body structure for a vacuum pump provided by the embodiment of the present application, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the structure can include:

[0031] The cylinder body 1 includes a target end face 11, and the target end face 11 is used to realize abutting connection with a connection end face of an opponent piece;

[0032] The target end face 11 is provided with a groove 12 extending along the circumference of the outer edge; the groove 12 is internally provided with a sealing element 2, which is used to form a sealing structure between the target end face 11 and the connecting end face after the two end faces abut.

[0033] The cylinder body structure for the vacuum pump provided by the embodiment of the application makes full use of the idle area on the cylinder body, sets a groove on the end face of the cylinder body without affecting the normal airway and valve chamber functions, and sets a sealing element in the groove during installation, which can form radial sealing at the connection between the cylinder body and the counter element, greatly reducing the risk of other leakage during use.

[0034] Compared with the conventional sealing method for improving the processing precision of the contact surface, the structure only needs to appropriately improve the original cylinder, and the improvement method can be milling processing by a milling machine, which is low in processing cost and easy to implement. The counter element does not need to be changed in structure, and the sealing performance can be improved, so that the purpose of effectively improving the sealing performance is achieved without increasing too much cost.

[0035] Meanwhile, the sealing element provided by the embodiment of the application can be replaced at any time according to the actual sealing condition after being used for a period of time, and the replacement method is also simple and easy to implement.

[0036] It can be understood that the sealing element provided by the embodiment of the application can adopt various forms, for example, a bellows, a static ring, etc. In order to further improve the sealing performance after the connection of the cylinder body and the counter element, the embodiment of the application can also provide that the sealing element 2 comprises a deformable sealing element, which deforms under the action of pressure after the abutment of the target end face and the connecting end face, so that the target end face and the connecting end face are in close contact.

[0037] The use of the deformable sealing element can ensure that the target end face and the connecting end face are in close contact after the connection of the cylinder body and the counter element, so that the original sealing structure is retained after the additional sealing is obtained, and the purpose of preventing leakage is further improved.

[0038] Further, the deformable sealing element comprises any one of a bellows and a sealing ring. In order to reduce the difficulty of obtaining the element, the embodiment of the application can also provide that the sealing element comprises an O-shaped sealing ring. The O-shaped sealing ring as a commonly used sealing element has the advantages of easy availability and low price.

[0039] The material of the O-shaped sealing ring can be determined according to different selection of a use scene. Specifically, the material of the O-shaped sealing ring can include rubber or polytetrafluoroethylene. The material of the O-shaped sealing ring is preferably a material that is resistant to corrosion and high temperature and has good deformation capacity. For example, when the medium is high-temperature and high-pressure carbon monoxide, the O-shaped sealing ring is preferably made of polytetrafluoroethylene material.

[0040] To ensure that the sink does not affect the normal function of other structures of the cylinder body, and can accommodate the sealing element, the size of the sink can be limited. Specifically, the width of the sink 12 can be 3.2-3.7 mm, and the depth of the sink 12 can be 2.4-3.0 mm. Further, the width of the sink 12 can be 3.5 mm, and the depth of the sink 12 can be 2.9 mm.

[0041] It can be understood that the cylinder body usually includes two end faces. In actual application, the sink can be arranged on one end face or both end faces according to needs. Specifically, as shown in Figure 4 The target end face 11 can include a cylinder head face, and the counterpart can include a cylinder head. Further, as shown in Figure 5 The target end face 11 can include a cylinder seat face, and the counterpart can include a crankcase. The sink arranged on the corresponding end face can ensure that the end face and the corresponding counterpart can be connected to obtain good sealing performance.

[0042] In summary, the cylinder body structure for a vacuum pump provided by the application has simple and reasonable structure, is convenient to install and use, and has low processing and manufacturing cost. By arranging the groove on the end face of the cylinder body and arranging the sealing element in the groove, the sealing performance of the end-to-end connection between the cylinder body and the counterpart can be greatly improved. At the same time, the structure is easy to process and form, and the original components are changed less, so that the processing and manufacturing cost is not increased too much. In addition, the arrangement of the groove and the sealing element does not affect the normal function of each channel of the cylinder body. The use of the structure can greatly improve the sealing performance of the vacuum pump, and thus achieve the purpose of improving the safety in the production process.

[0043] The application also provides a vacuum pump including the above-mentioned cylinder body structure for a vacuum pump.

[0044] The vacuum pump can further include a cylinder head and a cylinder body, and the cylinder head and the cylinder body are respectively connected to two ends of the crankcase one by one.

[0045] It should be noted that the relative terms, such as first and second, and the like, are used herein only to distinguish one entity or action from another, but do not necessarily require or imply any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "including a" statement does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0046] From the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary universal hardware platform. Based on such an understanding, the technical solutions of the present application can be embodied in a software product form, which can be stored in a storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments or some parts of the embodiments.

[0047] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system or system embodiments, since it is basically similar to the method embodiments, it is described more simply, and the relevant parts can be referred to the part of the method embodiments. The above-described system and system embodiments are only illustrative, and the units described as separate components can be or can not be physically separated, and the components displayed as units can be or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to the actual needs. Those skilled in the art can understand and implement without creative labor.

[0048] The above description is only the preferred embodiment of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

Claims

1. A cylinder structure for a vacuum pump, characterized by, Comprise: The cylinder body comprises a target end face for abutting connection with a connection end face of an opponent; Wherein, the target end face is provided with a groove extending along the circumference at the outer edge; the inside of the groove is used to set a sealing element, which is used to form a sealing structure between the target end face and the connection end face after abutting.

2. The cylinder structure for a vacuum pump according to claim 1, characterized by The sealing element comprises a deformable sealing element, which deforms under pressure after the target end face abuts the connection end face, so that the target end face and the connection end face are in close contact.

3. The cylinder structure for a vacuum pump according to claim 2, characterized by The deformable sealing element comprises any one of a bellows and a sealing ring.

4. The cylinder structure for a vacuum pump according to claim 3, characterized by The sealing element comprises an O-shaped sealing ring.

5. The cylinder structure for a vacuum pump according to claim 4, characterized by The material of the O-shaped sealing ring comprises rubber or polytetrafluoroethylene.

6. The cylinder structure for a vacuum pump according to claim 1, characterized by The width of the groove is 3.2-3.7 mm, and the depth of the groove is 2.4-3.0 mm.

7. The cylinder structure for a vacuum pump according to claim 6, characterized by The width of the groove is 3.5 mm, and the depth of the groove is 2.9 mm.

8. The cylinder structure for a vacuum pump according to claim 1, characterized by The target end face comprises a cylinder head face, and the opponent comprises a cylinder head.

9. The cylinder structure for a vacuum pump according to claim 1, characterized by The target end face comprises a cylinder seat face, and the opponent comprises a crankcase.

10. A vacuum pump, characterized by The cylinder structure for a vacuum pump comprises any one of claims 1-9.

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