Differential pressure transmitter sealing structure

Abstract

The utility model discloses a differential pressure transmitter sealing structure, which belongs to the technical field of transmitter sealing and comprises a differential pressure transmitter body, a threaded groove is arranged on the front end face of the differential pressure transmitter body, a sealing air bag is arranged inside the threaded groove, an air tap rod is fixedly connected to the right side of the sealing air bag, and a valve core is mounted inside the air tap rod. The outer wall of the air tap rod is sleeved with an air tap cap in a threaded mode, and a sealing round pad is arranged in front of the sealing air bag. Through the structural design of the sealing air bag, the air tap cap, the air tap rod and the sealing round pad, after the connecting round plate is screwed into the threaded groove, the connecting position between the connecting round plate and the differential pressure transmitter body can be sealed through the sealing round pad, meanwhile, the sealing air bag can be inflated through the air tap rod through external inflation equipment, and therefore the sealing effect of the differential pressure transmitter is improved. The sealing air bag can be used for filling the gap at the joint, so that the sealing effect is improved, and normal use of the differential pressure transformer is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of transmitter sealing technology, specifically a differential pressure transmitter sealing structure. Background Technology

[0002] Differential pressure transmitters, also known as differential pressure transducers, are a type of sensor. They are the most commonly used transmitters in industrial practice and are widely used in various industrial automation environments, including oil pipelines, water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemicals, oil wells, power, shipbuilding, machine tools, pipeline ventilation, boiler negative pressure, and many other industries.

[0003] A search revealed Chinese patent CN215121575U, which discloses a sealing structure for a differential pressure transmitter housing. The structure includes an outer shell with a mounting groove on one side. A protective sleeve is movably mounted on the outer shell through the mounting groove. A connecting pipe is fixedly mounted on the bottom of the outer shell. Four second fixing plates are fixedly mounted at equal intervals on the outer surface of the outer shell, each with a locking hole on its outer surface. Four first fixing plates are fixedly mounted at equal intervals on the outer surface of the protective sleeve, corresponding one-to-one with the four second fixing plates. A rotating component is provided between the first and second fixing plates. The protective sleeve is fixedly connected to the outer shell through the rotating component. Two sealing grooves are formed on the outer surface of the protective sleeve. This invention, through a series of structural features, provides the device with excellent sealing performance and easy disassembly.

[0004] However, the above design still has shortcomings. The sealing is achieved by the cooperation of the sealing ring and the sealing gasket. However, with the use of time, the sealing ring and the sealing gasket will gradually age, which will reduce the sealing effect of the differential pressure transmitter and affect the normal use of the differential pressure transmitter.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a sealing structure for a differential pressure transmitter to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a differential pressure transmitter sealing structure, comprising a differential pressure transmitter body, a threaded groove on the front end face of the differential pressure transmitter body, a sealing air bladder inside the threaded groove, an air nozzle rod fixedly connected to the right side of the sealing air bladder, a valve core installed inside the air nozzle rod, an air nozzle cap threadedly fitted on the outer wall of the air nozzle rod, a sealing gasket in front of the sealing air bladder, and a connecting circular plate rotatably disposed at the opening of the threaded groove in front of the sealing gasket.

[0008] As a further embodiment of this utility model: a connector is fixedly connected to the front of the connecting circular plate, and a connecting pipe is fixedly connected to the bottom of the differential pressure transmitter body.

[0009] As a further embodiment of this utility model: a hexagonal nut is fitted on the outer wall of the middle end of the connecting pipe, and an external thread structure is provided on the outer wall of the lower end of the connecting pipe.

[0010] As a further embodiment of this utility model: the outer wall of the connecting circular plate is fixedly connected to a second fixing block in a ring array, and the outer wall of the differential pressure transmitter body is fixedly connected to a first fixing block in a ring array.

[0011] As a further embodiment of this utility model: there are four second fixing blocks and four first fixing blocks.

[0012] As a further embodiment of this utility model: the surfaces of the first fixing block and the second fixing block are provided with a fixing screw threaded through them, and a fixing nut is threaded on the outer wall of the fixing screw.

[0013] This utility model has the following beneficial effects:

[0014] (1) Through the structural design of the sealing airbag, air nozzle cap, air nozzle rod and sealing round gasket, after the connecting round plate is screwed into the threaded groove, the connection between the connecting round plate and the differential pressure transmitter body can be sealed by the sealing round gasket. At the same time, air can be injected into the sealing airbag through the air nozzle rod by the external air inflation device, and the gap at the connection can be filled by the sealing airbag, thereby improving the sealing effect and ensuring the normal use of the differential pressure transformer. This solves the problem that the sealing ring and sealing gasket are used to achieve sealing, but with the use of time, the sealing ring and sealing gasket will gradually age, which will reduce the sealing effect of the differential pressure transmitter and affect the normal use of the differential pressure transmitter.

[0015] (2) Through the structural design of the first fixing block, the second fixing block, the fixing nut and the fixing screw, after the connecting round plate and the differential pressure transmitter body are installed, the fixing screw can be fixed by passing the fixing screw through the first fixing block and the second fixing block, and then screwing the fixing nut into the fixing screw. Through the mutual cooperation of multiple first fixing blocks, second fixing blocks and fixing screw, the connection between the connecting round plate and the differential pressure transmitter body can be strengthened, thereby further ensuring the stability of the seal. Attached Figure Description

[0016] Figure 1 This is a partial three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a top view of a partial structure of the present invention;

[0018] Figure 3 This is a partial structural diagram of the present invention viewed from below;

[0019] Figure 4 This is an exploded view of the present invention;

[0020] Figure 5 This is a magnified partial structural diagram of point A in this utility model.

[0021] In the diagram: 1. Connecting circular plate; 2. Connector; 3. Connecting pipe; 4. Differential pressure transmitter body; 5. Hexagonal nut; 6. External thread structure; 7. Thread groove; 8. Sealing airbag; 9. Air nozzle cap; 10. Air nozzle rod; 11. Sealing round gasket; 12. First fixing block; 13. Second fixing block; 14. Fixing nut; 15. Fixing screw. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1-5 The present invention provides an embodiment of a differential pressure transmitter sealing structure, comprising a differential pressure transmitter body 4, a threaded groove 7 on the front end face of the differential pressure transmitter body 4, a sealing airbag 8 inside the threaded groove 7, a valve rod 10 fixedly connected to the right side of the sealing airbag 8, a valve core installed inside the valve rod 10, a valve cap 9 threadedly fitted on the outer wall of the valve rod 10, a sealing round pad 11 in front of the sealing airbag 8, and a connecting round plate 1 rotatably disposed at the groove opening of the threaded groove 7 in front of the sealing round pad 11.

[0028] Specifically, such as Figure 1 and Figure 4As shown, during use, after the connecting circular plate 1 is screwed into the threaded groove 7, the connection between the connecting circular plate 1 and the differential pressure transmitter body 4 can be sealed by the sealing circular gasket 11. At the same time, air can be injected into the sealing airbag 8 through the air nozzle rod 10 by an external air inflation device, and the sealing airbag 8 can fill the gap at the connection, thereby improving the sealing effect and ensuring the normal use of the differential pressure transformer. This solves the problem that sealing is achieved by the cooperation of the sealing ring and the sealing gasket. However, with the use of time, the sealing ring and the sealing gasket will gradually age, which will reduce the sealing effect of the differential pressure transmitter and affect the normal use of the differential pressure transmitter.

[0029] A connector 2 is fixedly connected to the front of the connecting circular plate 1. A connecting pipe 3 is fixedly connected to the bottom of the differential pressure transmitter body 4. A hexagonal nut 5 is sleeved on the outer wall of the middle end of the connecting pipe 3. An external thread structure 6 is provided on the outer wall of the lower end of the connecting pipe 3. A second fixing block 13 is fixedly connected to the outer wall of the connecting circular plate 1 in a ring array. A first fixing block 12 is fixedly connected to the outer wall of the differential pressure transmitter body 4 in a ring array. There are four second fixing blocks 13 and four first fixing blocks 12. A fixing screw 15 is threaded through the surface of the first fixing block 12 and the second fixing block 13. A fixing nut 14 is threaded on the outer wall of the fixing screw 15.

[0030] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, during use, after the connecting circular plate 1 and the differential pressure transmitter body 4 are installed, the fixing screw 15 can be fixed by passing the fixing screw 15 through the first fixing block 12 and the second fixing block 13, and then screwing the fixing nut 14 onto the fixing screw 15. Through the mutual cooperation of multiple first fixing blocks 12 and second fixing blocks 13 and the fixing screw 15, the connection between the connecting circular plate 1 and the differential pressure transmitter body 4 can be strengthened, thereby further ensuring the stability of the seal.

[0031] Working principle: In this application, after the connecting circular plate 1 is screwed into the threaded groove 7, the connection between the connecting circular plate 1 and the differential pressure transmitter body 4 can be sealed by the sealing circular gasket 11. At the same time, air can be injected into the sealing air bag 8 through the air nozzle rod 10 by an external air inflation device, and the sealing air bag 8 can be used to fill the gap at the connection, thereby improving the sealing effect and ensuring the normal use of the differential pressure transformer. Secondly, after the connecting circular plate 1 and the differential pressure transmitter body 4 are installed, the fixing screw 15 can be passed through the first fixing block 12 and the second fixing block 13, and then the fixing nut 14 can be screwed into the fixing screw 15 to fix the fixing screw 15. Through the mutual cooperation of multiple first fixing blocks 12 and second fixing blocks 13 and fixing screw 15, the connection between the connecting circular plate 1 and the differential pressure transmitter body 4 can be strengthened, thereby further ensuring the stability of the seal.

[0032] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. At the same time, the electrical components mentioned in this application are all connected to an external power supply and control switch when in use. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, this utility model will not explain the control method and circuit connection in detail. Moreover, the external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.

[0033] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A differential pressure transmitter sealing structure, comprising a differential pressure transmitter body (4), characterized in that: The differential pressure transmitter body (4) has a threaded groove (7) on its front end face. A sealing airbag (8) is provided inside the threaded groove (7). A nozzle rod (10) is fixedly connected to the right side of the sealing airbag (8). A valve core is installed inside the nozzle rod (10). A nozzle cap (9) is threaded on the outer wall of the nozzle rod (10). A sealing gasket (11) is provided in front of the sealing airbag (8). A connecting circular plate (1) is rotatably provided at the groove opening of the threaded groove (7) in front of the sealing gasket (11).

2. The differential pressure transmitter sealing structure according to claim 1, characterized in that: A connector (2) is fixedly connected to the front of the connecting circular plate (1), and a connecting pipe (3) is fixedly connected to the bottom of the differential pressure transmitter body (4).

3. The differential pressure transmitter sealing structure according to claim 2, characterized in that: The middle end of the connecting pipe (3) is fitted with a hexagonal nut (5), and the lower end of the connecting pipe (3) is provided with an external thread structure (6).

4. The differential pressure transmitter sealing structure according to claim 1, characterized in that: The outer wall of the connecting circular plate (1) is fixedly connected to a second fixing block (13) in a ring array, and the outer wall of the differential pressure transmitter body (4) is fixedly connected to a first fixing block (12) in a ring array.

5. A differential pressure transmitter sealing structure according to claim 4, characterized in that: There are four second fixing blocks (13) and four first fixing blocks (12).

6. The differential pressure transmitter sealing structure according to claim 4, characterized in that: The first fixing block (12) and the second fixing block (13) are threaded with fixing screws (15), and fixing nuts (14) are threaded on the outer wall of the fixing screws (15).

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