A rotation-free mounting structure for a pressure gauge

Abstract

The utility model provides a kind of pressure gauge's rotation-free mounting structure, including pressure gauge body, its one side extends outward and forms mounting connector, the inside structure of mounting connector has the air passage that with the inside of pressure gauge body intercommunication, further include locking member, inside structure has the inner channel that passes through its head and tail end, the outer wall structure of locking member has outer thread;Mounting groove, recessed in the side of inner channel, the spacing between mounting groove and mounting connector is greater than the spacing between inner channel and mounting connector;Extrusion sleeve, with elasticity, inside structure has the insertion slot that passes through its head and tail end, extrusion sleeve is tightly clamped between the inner wall of mounting groove and the outer wall of mounting connector.When using the mounting structure of the utility model, only need to rotate locking member, and pressure gauge body remains unmoved, solve the problem that large or with other elements pressure gauge cannot be rotated in narrow space, greatly improve installation convenience and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pressure gauge installation technology, specifically, it demonstrates a pressure gauge installation structure that does not require rotation. Background Technology

[0002] Pressure gauges are typically used when measuring ambient pressure, and existing pressure gauges are generally installed using a threaded mounting method.

[0003] For example, the utility model CN222013390U disclosed in the existing Chinese patent technology is a vacuum pressure gauge that is easy to install. It is installed by threading, that is, by turning the pressure gauge clockwise or counterclockwise to install or remove it.

[0004] However, in some special testing environments with limited space, the pressure gauge cannot be easily screwed on. That is, it is difficult for personnel to manually rotate and install the pressure gauge. They can only turn the pressure gauge little by little, which makes the installation difficult and wastes installation time. Moreover, it is more difficult to disassemble the pressure gauge. Utility Model Content

[0005] The purpose of this invention is to provide a pressure gauge mounting structure that does not require rotation, allowing for fixed installation without controlling the rotation of the pressure gauge.

[0006] The technical solution is as follows: A pressure gauge non-rotation mounting structure includes a pressure gauge body, one side of which extends outward to form a mounting joint. The mounting joint has an internal air passage communicating with the interior of the pressure gauge body. It also includes: The locking component has an internal groove extending through its two ends so that the mounting connector can be inserted into the internal groove. The outer wall of the locking component has external threads, and the locking component can rotate relative to the mounting connector about the axis of the mounting connector. The mounting groove is recessed on one side of the inner channel, and the distance between the mounting groove and the mounting joint is greater than the distance between the inner channel and the mounting joint. The extrusion kit is elastic and has internal slots that extend through its ends so that the mounting connector can be inserted into the slots. The extrusion kit is tightly clamped between the inner wall of the mounting slot and the outer wall of the mounting connector.

[0007] In addition, the above embodiments of this utility model may also have the following additional technical features: According to one embodiment of this utility model, the compression kit is a threaded sleeve. The multi-line contact structure of the threaded sleeve allows it to generate a larger and more uniform contact area and friction with the outer wall of the mounting joint when under pressure, resulting in a better locking effect.

[0008] Based on the above technical solution, the height of the extrusion kit is greater than the height of the mounting groove. If the heights are equal or smaller, the extrusion kit may not be fully compressed, resulting in insufficient initial friction. A greater height means that the extrusion kit is already subjected to a certain amount of axial compression at the initial stage of installation, generating initial friction.

[0009] According to one embodiment of this utility model, a recessed groove is provided in the middle of the tail end of the mounting connector, and the groove communicates with the air passage. The groove provides a standard and reliable position for installing a sealing ring (such as an O-ring).

[0010] Based on the above technical solution, a sealing ring can be installed in the groove. When the pressure gauge body is finally pushed into the mounting hole, the sealing ring in the groove will be compressed between the end face of the mounting joint and the interface plane, thus achieving a good sealing effect.

[0011] According to one embodiment of this utility model, a screw-on part is provided on the top of the locking member. The screw-on part can be a hexagonal head, a flathead screwdriver, an internal hexagonal head, etc. This design allows operators to easily apply torque to rotate the locking member manually or using standard tools such as wrenches and screwdrivers, greatly improving the convenience and efficiency of installation and avoiding the problem of difficulty in tightening by hand.

[0012] According to one embodiment of this utility model, the locking member and the mounting joint are in a clearance fit. The clearance fit prevents the locking member and the mounting joint from rotating together, ensuring that only the locking member rotates independently.

[0013] Compared with the prior art, the advantages of this utility model are as follows: during installation, only the locking part needs to be rotated while the pressure gauge body remains stationary, which solves the problem of not being able to rotate large pressure gauges or pressure gauges with other components in narrow spaces, greatly improving the convenience and efficiency of installation; the design of the mounting groove provides space and force application point for the radial deformation of the extrusion kit. When the locking part is screwed into the external threaded hole, its groove wall will press the extrusion kit inward. When the extrusion kit is subjected to radial extrusion, it can simultaneously apply a large static friction force to the inward mounting joint and the inner wall of the outer mounting groove, thus fixing the pressure gauge. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a pressure gauge's rotation-free mounting structure according to an embodiment of the present invention. Figure 2 This is a cross-sectional schematic diagram of the non-rotational installation structure; Figure 3 This is a schematic cross-sectional view of the pressure gauge body; Figure 4 This is a schematic cross-sectional view of the locking element and the extrusion kit; The relevant markings in the attached diagram are: 1-pressure gauge body, 2-mounting connector, 3-locking element, 4-mounting groove, 5-compression kit, 6-sealing ring; 21-air passage, 22-groove, 31-inner channel, 32-external thread, 33-tightening part, 51-slot. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model embodiment proposes a pressure gauge mounting structure that does not require rotation, see reference. Figure 1 and Figure 2 As shown, it mainly consists of three parts: pressure gauge body 1, locking component 3, and compression kit 5.

[0017] The pressure gauge body 1 is a conventional pressure measuring instrument in the art, which has a dial for displaying pressure readings and internal sensitive elements such as Bourdon tubes and diaphragms. One side of the pressure gauge body 1 extends outward to form a columnar mounting joint 2. An air passage 21 is constructed axially inside the mounting joint 2. The air passage is connected to the internal cavity of the pressure gauge body, so that the medium to be measured can enter the interior of the pressure gauge through the air passage, drive the sensitive element to deform, and thus indicate the pressure value.

[0018] Combination Figure 4 As shown, the locking element 3 is a hollow sleeve-shaped component with an internal channel 31 running through its two ends. The locking element 3 is typically made of metal. The mounting connector 2 can be fitted into the internal channel 31. The outer wall of the locking element 3 is machined with a helical external thread 32 for engaging with the standard internal thread interface, i.e., the external threaded hole, on the equipment or pipeline under test. Crucially, the locking element 3 and the mounting connector 2 use a clearance fit, meaning the locking element 3 can rotate freely relative to the stationary mounting connector 2 and around its axis. There is no fixed connection or obvious linkage between the two in the circumferential direction; the rotation of the locking element 3 will not cause the rotation of the mounting connector 2.

[0019] On one side of the inner channel 31 of the locking member 3 (the lower side in the figure), an annular mounting groove 4 is recessed inward. The radial dimension, i.e., the diameter, of the mounting groove 4 is larger than the radial dimension of the inner channel 31 that accommodates the mounting connector 2, so that the inner wall of the mounting groove 4 can form an annular reserved space between it and the outer wall of the mounting connector 2 inserted therein.

[0020] See also Figure 4As shown, the extrusion kit 5 is a ring-shaped component with a certain degree of elasticity. Its internal structure includes slots 51 extending through both ends, through which the mounting connector 2 can also pass. The extrusion kit 5 can be pre-fitted onto the mounting connector 2 and positioned axially at the corresponding mounting groove 4 of the locking member 3. In its initial free state, the outer diameter of the extrusion kit 5 is slightly larger than the inner diameter of the mounting groove 4, and / or its inner diameter is slightly smaller than the outer diameter of the mounting connector 2.

[0021] The compression kit 5 is the core component for achieving rotation-free locking in this structure. In a preferred embodiment, the compression kit 5 is a threaded sleeve, which is a mature fastener insert, usually made of highly elastic, high-strength stainless steel wire with a diamond cross-section, forming a helical coil with multiple threads on both the inside and outside. This allows it to form multi-line contact with the contact surface when subjected to radial compression, rather than surface contact of the entire cylindrical surface. This multi-line contact structure can generate a larger and more uniform contact area under the same pressure, thereby converting into a more stable and greater static friction force.

[0022] To ensure reliable initial locking force, the free-state height (i.e., axial length) of the compression kit 5 is designed to be slightly greater than the depth (i.e., height) of the mounting groove 4. When the compression kit 5 is inserted into the mounting groove 4 area along with the mounting connector 2, its two end faces will make slight axial pre-contact or slight compression with the upper and lower sidewalls of the mounting groove 4. This results in an initial axial pre-tightening force, so that the compression kit 5 already has a certain initial static friction force between itself and the outer wall of the mounting connector 2 and the inner wall of the mounting groove before subsequent radial compression occurs. This helps with the initial positioning during installation and prevents the pressure gauge from shaking or falling off due to gravity or slight disturbance during the initial screwing of the locking part.

[0023] Working principle: When the locking element 3 is screwed into the external threaded hole through its external thread 32, since there is only a clearance fit between the locking element 3 and the mounting joint 2 of the pressure gauge body 1, the pressure gauge body 1 itself does not need to rotate. As the locking element 3 is continuously screwed in, the end face or internal stepped surface of the external threaded hole will gradually abut against and axially push the locking element 3. Since the compression kit 5 is constrained axially, the tendency of the locking element 3 to move axially relative to the mounting joint 2 and the compression kit 5 will be hindered. In fact, this axial pushing force will be converted into a radial force on the compression kit 5 fitted inside it through the side wall of the mounting groove 4 (especially the groove wall near the entrance of the external threaded hole). Under the radial pressure, the extrusion kit 5 undergoes elastic deformation and is radially compressed. Its deformation simultaneously presses inward against the outer wall of the mounting joint 2 and outward against the inner wall of the mounting groove 4. Through this radial extrusion, a huge static friction force is generated between the extrusion kit 5 and the outer wall of the mounting joint 2 and the inner wall of the mounting groove 4. The mounting joint 2, the extrusion kit 5, and the locking element 3 are coupled into an approximately rigid whole through friction. Finally, the pressure gauge body 1 is fixed by the threaded connection between the locking element 3 and the external interface, and the fixing torque is entirely provided by the engagement of the locking element 3 with the threaded hole of the external interface. The pressure gauge body 1 does not require a large rotation throughout the process.

[0024] Combination Figure 3 As shown, at the tail end of the mounting connector 2 (i.e., the end furthest from the pressure gauge body and used for connecting to the external interface), there is an annular groove 22 recessed inward in the circumferential direction. This groove 22 communicates with the air passage 21, but its depth does not affect the unobstructed flow of the air passage. This groove 22 is the installation position for a standard sealing ring 6, such as an O-ring. Before installation, a suitably sized O-ring is inserted into the groove 22, and the thickness of the sealing ring is greater than the thickness of the groove.

[0025] When the mounting connector 2 is inserted into the external interface and the locking element 3 is tightened in place, the tail end face of the mounting connector 2, including the groove and O-ring, is pressed against the flat end face or sealing plane of the external interface. The sealing ring 6 is subjected to axial compression, resulting in elastic deformation, which fills the small gap between the end face of the mounting connector and the end face of the external interface, thereby forming a reliable seal at the gas inlet and effectively preventing gas leakage. This design separates the sealing function from the locking function, simplifies the structure, and improves the reliability and consistency of the seal.

[0026] To facilitate operation, especially in confined spaces or when a larger locking torque is required, a screwing part 33 is provided on the top of the locking component 3, at the end furthest from the mounting connector. This screwing part can be an external hexagonal head, an internal hexagonal hole, a flat slot, a Phillips head, or other shapes that can be held by special tools. This design allows installers to easily apply rotational torque to the locking component manually or using standard wrenches, sockets, screwdrivers, and other tools, solving the problem of difficulty in turning by hand, especially in the final locking stage, and greatly improving installation efficiency.

[0027] The following describes in detail the steps for installing a pressure gauge using the non-rotational installation structure of this utility model, taking a typical installation scenario as an example: 1. Correctly install the sealing ring 6 into the groove 22 at the tail end of the mounting joint 2, and fit the extrusion kit 5, i.e. the threaded sleeve, onto the mounting joint 2, and roughly position it to correspond to the axial position of the mounting groove 4 of the locking element 3 in the future.

[0028] 2. Insert the locking member 3 into the mounting connector 2 from its top, i.e., the screw-on end, so that the mounting connector 2 passes through the inner groove 31 of the locking member 3. Move the locking member 3 axially along the mounting connector 2 until the mounting groove 4 on the locking member 3 is axially aligned with the compression fitting 5 already fitted onto the mounting connector 2. At this point, the compression fitting 5 should be fully or mostly contained within the mounting groove 4 of the locking member 3. Since the height of the compression fitting 5 may be slightly greater than the depth of the mounting groove 4, a slight axial pre-compression will occur.

[0029] 3. Keeping the pressure gauge body 1 still, align the end of the mounting connector 2, which has been fitted with the locking piece 3 and the compression kit 5, with the internal thread hole of the external interface, and smoothly insert the mounting connector 2 into the interface hole along the axial direction. The beginning of the external thread of the locking piece 3 should also be roughly aligned with the beginning of the internal thread of the interface.

[0030] 4. At this time, use your hand or a tool such as a wrench to hold the screw part 33 of the locking part 3, and start to rotate the locking part 3 clockwise (assuming it is a standard right-hand thread). As the locking part 3 is screwed in, its external thread engages with the internal thread of the interface, and the locking part 3 gradually moves into the interface. Since the extrusion kit 5 is located in the mounting groove 4, its axial movement is restricted. The locking part 3 generates relative displacement with respect to the mounting joint 2 and the extrusion kit 5. The side wall of the mounting groove 4 (especially the side wall near the inside of the interface) begins to radially extrude the extrusion kit 5 located in the groove from the side.

[0031] 5. Continue rotating the locking part 3 until you feel a significant increase in resistance, indicating that the locking part 3 has been tightened in place. Usually, the end face of the locking part will abut against the step inside the interface, or the preset tightness will be achieved through the thread engagement length. At this point, it means that the rotation installation is in place.

[0032] Disassembly process of pressure gauge: The procedure is the reverse of the installation steps. Use a tool to rotate the screw part 33 of the locking member 3 counterclockwise; the locking member 3 is gradually unscrewed, and its radial pressure on the compression kit 5 is released. The compression kit 5 recovers elastically, and the friction between it and the side wall of the mounting joint 2 and the mounting groove 4 is rapidly reduced; when the locking member 3 is completely loosened, since there may still be a small amount of residual friction in the compression kit 5, it may be necessary to shake it slightly or pull the pressure gauge body 1 directly along the axial direction; throughout the disassembly process, the pressure gauge body 1 does not need to be rotated at a large angle.

[0033] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A pressure gauge non-rotation mounting structure, comprising a pressure gauge body (1), one side of which extends outward to form a mounting joint (2), the mounting joint (2) having an internal structure with an air passage (21) communicating with the interior of the pressure gauge body (1), characterized in that, Also includes: The locking member (3) has an internal groove (31) that runs through its head and tail so that the mounting joint (2) can be inserted into the internal groove (31). The outer wall of the locking member (3) has an external thread (32). The locking member (3) can rotate relative to the mounting joint (2) about the axis of the mounting joint (2). The mounting groove (4) is recessed on one side of the inner channel (31), and the distance between the mounting groove (4) and the mounting joint (2) is greater than the distance between the inner channel (31) and the mounting joint (2). The extrusion kit (5) is elastic and has an internal structure with slots (51) that pass through its ends so that the mounting connector (2) can be inserted into the slots (51). The extrusion kit (5) is tightly clamped between the inner wall of the mounting groove (4) and the outer wall of the mounting connector (2).

2. The pressure gauge non-rotation mounting structure according to claim 1, characterized in that, The extrusion kit (5) is a threaded sleeve.

3. The pressure gauge non-rotation mounting structure according to claim 2, characterized in that, The height of the extrusion kit (5) is greater than the height of the mounting groove (4).

4. The pressure gauge non-rotation mounting structure according to claim 1, characterized in that, The mounting connector (2) has a recessed groove (22) at the middle of its tail end, which is connected to the air passage (21).

5. The pressure gauge non-rotation mounting structure according to claim 4, characterized in that, A sealing ring (6) may be installed in the partition groove (22).

6. The pressure gauge non-rotation mounting structure according to claim 1, characterized in that, The locking member (3) is provided with a screwing part (33) on the top outside.

7. The pressure gauge non-rotation mounting structure according to claim 1, characterized in that, The locking member (3) and the mounting joint (2) are in a clearance fit manner.

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