Anti-unscrewing device and pressure transmitter

Abstract

The utility model provides an anti-unscrewing device and a pressure transmitter, the anti-unscrewing device is used for preventing meter covers of the pressure transmitter from being unscrewed from a meter shell, the two meter covers are respectively arranged at two axial ends of the meter shell, the meter shell is provided with a threaded hole and a slot, and the anti-unscrewing device comprises a main body provided with a through hole; the two clamping parts are vertically arranged at the two ends of the main body respectively and are opposite to each other; the inserting part is perpendicular to the main body, and the extending direction of the inserting part is the same as that of the two clamping parts; the main body is suitable for being arranged on the periphery of the meter shell in the axial direction of the meter shell, the two clamping parts are used for clamping the two meter covers at the two axial ends of the pressure transmitter, the inserting parts are suitable for being inserted into the inserting grooves, and the penetrating holes are suitable for being arranged right opposite to the threaded holes and tightened through screws.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to an anti-unscrewing device and a pressure transmitter. Background Art

[0002] At present, the cases of pressure transmitters on the market mostly use threaded connections, which can be easily unscrewed by unauthorized personnel, causing damage to internal components, resulting in safety hazards and product quality problems.

[0003] Therefore, it is necessary to propose a watch case anti-unscrewing device to solve this problem. Utility Model Content

[0004] The utility model aims to provide an anti-unscrewing device and a pressure transmitter, so as to solve the problem that a cover and a case of the pressure transmitter are easily unscrewed by unauthorized personnel, thus causing damage to the internal components of the transmitter.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] An anti-unscrewing device is used to prevent a cover of a pressure transmitter from being unscrewed from a case. The cover is two in number and is disposed at two axial ends of the case, respectively. The case is provided with a threaded hole and a slot. The anti-unscrewing device comprises:

[0007] The main body is provided with a through hole along the thickness direction thereof;

[0008] Two clamping parts are respectively arranged perpendicularly at two ends of the main body in the longitudinal direction and are arranged opposite to each other;

[0009] The plug-in portion is arranged perpendicular to the main body, and the extending direction of the plug-in portion is the same as the extending direction of the two clamping portions;

[0010] Among them, the main body is suitable for being arranged on the outer periphery of the case along the axial direction of the case, the two clamping parts are used to clamp the two cover at the axial ends of the pressure transmitter, the plug-in part is suitable for being inserted into the slot, and the through hole is suitable for being arranged opposite to the threaded hole and tightened by a screw.

[0011] In some embodiments of the utility model, the anti-unscrewing device is provided with two plug-in parts, and the two plug-in parts are respectively arranged perpendicularly on both sides of the width direction of the main body and are arranged opposite to each other;

[0012] The two plug-in parts are suitable for being inserted into the two slots arranged on the watch case.

[0013] In some embodiments of the present invention, the two plug-in portions are respectively located on two sides of the through hole, and the two slots are respectively arranged on two sides of the threaded hole along the circumference of the watch case.

[0014] In some embodiments of the present invention, the snap-fitting portion is configured to be snap-fitted into a notch on a peripheral wall of the watch cover along a radial direction of the watch cover.

[0015] In some embodiments of the utility model, the thickness of the portion of the main body where the threaded hole is provided is greater than the thickness of the remaining portions of the main body, and the portion of the main body where the threaded hole is provided is suitable for abutting against the portion of the case where the threaded hole is provided.

[0016] In some embodiments of the utility model, the main body is suitable for being attached to the outer periphery of the watch case and / or the outer periphery of the watch cover;

[0017] and / or,

[0018] The clamping portion is suitable for clamping with the notch along the circumference of the watch cover, and / or is suitable for abutting against the end surface of the watch cover facing away from the watch case.

[0019] In some embodiments of the utility model, at least one of the main body, the clamping portion and the plug-in portion is in the shape of a strip;

[0020] And / or, the clamping portion and / or the plug-in portion is in the shape of a flat plate.

[0021] In some embodiments of the utility model, the portion of the clamping portion that is away from the main body is configured to be adapted to have a size along the circumference of the cover that is larger than a size of the notch along the circumference of the cover, so that the clamping portion can be clamped with the notch along the radial direction of the cover.

[0022] In order to achieve the above purpose, the utility model also provides the following technical solutions:

[0023] A pressure transmitter, comprising:

[0024] A case having threaded holes and slots;

[0025] Two watch covers, respectively arranged at two axial ends of the watch case;

[0026] Screws;

[0027] The above-mentioned anti-unscrewing device has a main body arranged on the outer periphery of the watch case along the axial direction of the watch case, and the through hole of the main body is arranged opposite to the threaded hole of the watch case and is tightened by the screw.

[0028] In some embodiments of the utility model, the through hole of the main body is a countersunk hole, and the screw is a countersunk screw.

[0029] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0030] The utility model provides an anti-unscrewing device for a pressure transmitter and a pressure transmitter including the anti-unscrewing device, which solves the problem in the prior art that a cover and a case of the pressure transmitter are easily unscrewed by unauthorized personnel, causing damage to the internal components of the transmitter, thereby eliminating safety hazards and product quality problems and improving the safety and reliability of the pressure transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation plans of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic structural diagram of a pressure transmitter provided by an embodiment of the utility model and equipped with an anti-unscrewing device at a first viewing angle;

[0033] Figure 2 for Figure 1 A schematic diagram of the structure of the pressure transmitter in the second observation angle;

[0034] Figure 3 for Figure 1 A schematic structural diagram of the anti-unscrewing device in FIG. 1 under a third viewing angle;

[0035] Figure 4 for Figure 1 A schematic structural diagram of the anti-unscrewing device in a fourth observation angle;

[0036] Figure 5 for Figure 1 A schematic structural diagram of the anti-unscrewing device in a fifth observation angle;

[0037] Figure 6 for Figure 1 Schematic diagram of the structure of the anti-unscrewing device at a sixth observation angle.

[0038] The main reference numerals in the drawings of this application specification are described as follows:

[0039] 1- anti-twist-off device; 11- main body; 110- through hole; 12- clamping part; 13- plug-in part

[0040] 2-watch cover; 20-notch;

[0041] 3- Watch case. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] Any specific numerical value disclosed herein (including the endpoint of the numerical range) is not limited to the exact value of the numerical value, but should be understood to also cover values ​​close to the exact value, such as all possible values ​​within the range of ±5% of the exact value. In addition, for the disclosed numerical range, the endpoint values ​​of the range, the endpoint values ​​and the specific point values ​​in the range, and the specific point values ​​can be arbitrarily combined to obtain one or more new numerical ranges, and these new numerical ranges should also be regarded as specifically disclosed herein.

[0044] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by those skilled in the art. If a term is defined herein and its definition is different from the commonly understood meaning in the art, the definition herein shall prevail.

[0045] Example 1

[0046] See also Figure 1 and Figure 3 In some embodiments of the utility model, an anti-unscrewing device 1 is provided, which is used to prevent a cover 2 of a pressure transmitter from being unscrewed from a case 3. The number of the cover 2 is two, and the two cover 2 are respectively arranged at the axial ends of the case 3. The case 3 is provided with a threaded hole and a slot. The anti-unscrewing device 1 comprises: a main body 11, which is provided with a through hole 110 along its thickness direction; two clamping parts 12, which are respectively arranged at the two ends of the longitudinal direction of the main body 11 vertically and are arranged opposite to each other; a plug-in part 13, which is arranged perpendicular to the main body 11, and the extension direction of the plug-in part 13 is the same as the extension direction of the two clamping parts 12; wherein the main body 11 is suitable for being arranged on the outer periphery of the case 3 along the axial direction of the case 3, the two clamping parts 12 are used to clamp the two cover 2 at the axial ends of the pressure transmitter, the plug-in part 13 is suitable for being inserted into the slot, and the through hole 110 is suitable for being arranged opposite to the threaded hole and tightened by a screw.

[0047] For details, see Figures 1 to 3When the user tries to unscrew the watch cover 2 from the watch case 3, the watch cover 2 will be displaced along the axial direction of the watch case 3, and the clamping parts 12 located at the axial ends of the main body 11 can significantly prevent the axial displacement of the watch cover 2 along the axial direction of the watch case 3 at the axial ends of the watch case 3, thereby achieving fixation between the watch cover 2 and the watch case 3, and preventing the watch cover 2 from being unscrewed from the watch case 3 by the user's bare hands.

[0048] See also Figure 1 and Figure 3 The anti-unscrewing device 1 provided by the utility model has a through hole 110. In some embodiments, the inner wall surface of the through hole 110 is provided with an internal thread, and in other embodiments, the inner wall surface of the through hole 110 may not be provided with an internal thread. Specifically, in some embodiments, the inner wall surface of the through hole 110 is provided with an internal thread, and in this case, a screw or a screw rod can be screwed in through the through hole 110 and the threaded hole in turn, thereby fixing the anti-unscrewing device 1 and the watch case 3; in other embodiments, the inner wall surface of the through hole 110 is not provided with an internal thread, and in this case, a nut can be added to the side of the body 11 away from the watch case 3, and the screw or the screw rod can be screwed in through the through hole 110 and the threaded hole in turn through the nut, thereby fixing the anti-unscrewing device 1 and the watch case 3. It can be understood that the specific specifications and parameters of the above-mentioned internal threads, screws, screws and nuts can be selected and adjusted according to actual design standards.

[0049] It is understandable that before the anti-unscrewing device 1 provided by the utility model is assembled to the pressure transmitter, the two cover 2 are first fixed to the axial ends of the case 3 by screwing or other conventional methods, and then the anti-unscrewing device 1 is installed on the outside of the cover 2 and the case 3. It is worth noting that in some embodiments of the utility model, the material of the anti-unscrewing device 1 has a certain elasticity, so when it is installed on the pressure transmitter, it can be bent with a little force to make it elastically deformed, so that the clamping part 12 of the anti-unscrewing device 1 clamps the outer end surface of the cover 2, so that the cover 2 cannot be directly unscrewed, and then a screwdriver or other adapter tool is used to tighten the screw or screw through the through hole 110 and the threaded hole in turn, thereby completing the assembly of the anti-unscrewing device 1 and the pressure transmitter.

[0050] Of course, when it is necessary to disassemble the anti-unscrewing device 1 from the pressure transmitter, first use a screwdriver or an adapter tool to unscrew the screw or screw from the through hole 110 and the threaded hole, and then use a little force to pry open the clamping part 12, so as to achieve the disengagement between the anti-unscrewing device 1 and the pressure transmitter.

[0051] In some embodiments of the utility model, a ground wire is provided inside the pressure transmitter, and one end of the ground wire is connected and conducted to one end of the screw or screw rod screwed into the case 3 via the threaded hole. At this time, a wire is connected to the end of the screw or screw rod away from the ground wire, which can provide grounding protection for the pressure transmitter. It is worth noting that in the prior art, it is also necessary to punch a hole in the case 3 to lead the ground wire inside the pressure transmitter through the hole to the outside of the pressure transmitter for grounding; and the anti-unscrewing device 1 provided by the utility model can use this hole (i.e. the threaded hole mentioned above), on the one hand, continue to use the threaded hole to realize the grounding of the pressure transmitter, and on the other hand, use the threaded hole to realize the fixing effect between the anti-unscrewing device 1 and the case 3, so there is no need to drill holes and tap separately, which can be said to kill two birds with one stone.

[0052] Obviously, the anti-unscrewing device for the pressure transmitter provided by the utility model solves the problem in the prior art that the cover and case of the pressure transmitter are easily unscrewed by unauthorized personnel, causing damage to the internal components of the transmitter, thereby eliminating safety hazards and product quality problems and improving the safety and reliability of the pressure transmitter. In addition, the anti-unscrewing device provided by the utility model improves the safety of the pressure transmitter, effectively prevents unauthorized personnel from unscrewing the case, and reduces accidents; it also improves the reliability of the product, ensures the stability and reliability of the device, can ensure the sealing between the case and the cover for a long time, and ensure the normal operation of the components inside the transmitter; it also reduces maintenance costs, and the structure of the anti-unscrewing device is simple and efficient, easy to install and disassemble, and reuse, reducing the cost of maintenance and replacement, and has better economy.

[0053] See also Figure 3 In some embodiments of the present invention, the anti-unscrewing device 1 is provided with two plug-in parts 13, which are respectively arranged vertically on both sides of the width direction of the main body 11 and are arranged opposite to each other; the two plug-in parts 13 are suitable for being inserted into the two slots provided on the watch case 3. It can be understood that the above-mentioned symmetrical arrangement can improve the stability of the anti-unscrewing device 1 and prevent damage by unnecessary torque.

[0054] See also Figure 3 In some embodiments of the present invention, the two plug-in parts 13 are respectively located on both sides of the through hole 110, and the two slots are respectively arranged on both sides of the threaded hole along the circumference of the watch case 3. It can be understood that the above symmetrical arrangement can improve the stability of the anti-unscrewing device 1 and prevent it from being damaged by unnecessary torque; in addition, this symmetrical arrangement is also convenient for processing.

[0055] See also Figures 1 to 3In some embodiments of the present invention, the snap-fitting portion 12 is configured to be snap-fitted into a notch 20 on the peripheral wall of the watch cover 2 along a radial direction of the watch cover 2 .

[0056] In some embodiments of the utility model, the thickness of the portion of the main body 11 where the threaded hole is provided is greater than the thickness of the remaining portions of the main body 11, and the portion of the main body 11 where the threaded hole is provided is suitable for abutting against the portion of the case 3 where the threaded hole is provided.

[0057] In some embodiments of the utility model, the portion of the main body 11 without threaded holes can be suspended relative to the outer peripheral surface of the case 3 and / or the outer peripheral surface of the watch cover 2; obviously, the specific form can be selected and adjusted according to the actual application scenario and design standards.

[0058] See also Figure 1 and Figure 2 In some embodiments of the present invention, the main body 11 is suitable for fitting to the outer periphery of the watch case 3 and / or the outer periphery of the watch cover 2; obviously, this fitting design is more compact and can improve space utilization.

[0059] See also Figure 1 and Figure 2 In some embodiments of the utility model, the clamping portion 12 is suitable for clamping with the notch 20 along the circumference of the watch cover 2, that is, in these embodiments, the clamping portion 12 and the notch 20 are clamped to achieve "fixing the watch cover 2 and the watch case 3 at both axial ends of the watch case 3 to prevent the watch cover 2 from being unscrewed."

[0060] In some embodiments of the utility model, the clamping portion 12 is suitable for abutting against the end face of the watch cover 2 facing away from the watch case 3, that is, in these embodiments, the clamping portion 12 abuts against the outer end face of the watch cover 2 to achieve "limiting and fixing the watch cover 2 and the watch case 3 at both axial ends of the watch case 3, thereby preventing the watch cover 2 from being unscrewed."

[0061] In some embodiments of the present invention, at least one of the main body 11 , the clamping portion 12 and the plug-in portion 13 is in a strip shape.

[0062] See also Figure 1 and Figure 3 In some embodiments of the present invention, the main body 11 is in the shape of a slat, and the longitudinal direction of the slat-shaped main body 11 is the same as the axial direction of the watch case 3 and the axial direction of the watch cover 2; obviously, this design is simple and efficient.

[0063] See also Figure 1 and Figure 3In some embodiments of the utility model, the clamping portion 12 and / or the plug-in portion 13 are in the shape of a plate; it is worth noting that the normal direction of the flat clamping portion 12 and the normal direction of the flat plug-in portion 13 are perpendicular to the longitudinal direction of the main body 11; it is obvious that this design is simple and efficient.

[0064] It is understandable that the specific forms of the main body 11, the clamping portion 12 and the plug-in portion 13 may be selected according to actual application scenarios and design standards.

[0065] See also Figure 1 and Figure 3 In some embodiments of the utility model, the portion of the clamping portion 12 away from the main body 11 is configured to be suitable for a size along the circumference of the watch cover 2 to be larger than a size of the notch 20 along the circumference of the watch cover 2, so that the clamping portion 12 can be clamped with the notch 20 along the radial direction of the watch cover 2; obviously, the above design is simple and efficient, and can enable the anti-unscrewing device 1 to firmly fix the watch cover 2 and the watch case 3, thereby preventing the watch cover 2 from being unscrewed.

[0066] See also Figure 4 In some embodiments of the present invention, the dimension A of the main body in the longitudinal direction is 99 mm.

[0067] In some embodiments of the present invention, a dimension B of the main body in a thickness direction is 3 mm.

[0068] See also Figure 4 and Figure 6 In some embodiments of the present invention, the dimension C of the body in the width direction is 8.6 mm.

[0069] See also Figure 4 In some embodiments of the present invention, the dimension D of the clamping portion in the length direction is 15 mm.

[0070] See also Figure 5 and Figure 6 In some embodiments of the present invention, the dimension E of the clamping portion in the width direction is 15 mm.

[0071] See also Figure 4 In some embodiments of the present invention, the dimension F of the clamping portion in the thickness direction is 3 mm.

[0072] See also Figure 4 In some embodiments of the present invention, the dimension G of the plug-in portion in the length direction is 7 mm.

[0073] See also Figure 4 In some embodiments of the present invention, the dimension H of the plug-in portion in the width direction is 8 mm.

[0074] In some embodiments of the present invention, the dimension J of the plug-in portion in the thickness direction is 3 mm.

[0075] See also Figure 5 In some embodiments of the present invention, the radial dimension K of the through hole 110 is 3 mm.

[0076] It is understandable that the specific values ​​of the above dimensions can be selected and adjusted according to actual application scenarios and design standards.

[0077] Example 2

[0078] See also Figure 1 and Figure 2 In some embodiments of the utility model, a pressure transmitter includes: a case 3, provided with a threaded hole and a slot, wherein the slot is suitable for accommodating a ground wire; two covers 2, respectively arranged at the axial ends of the case 3; screws; an anti-unscrewing device 1 as described in Example 1, wherein a main body 11 of the anti-unscrewing device 1 is arranged on the outer periphery of the case 3 along the axial direction of the case 3, and a through hole 110 of the main body 11 is arranged opposite to the threaded hole of the case 3, and is tightened by the screws.

[0079] See also Figure 1 and Figure 2 In some embodiments of the utility model, the through hole 110 of the main body 11 is a countersunk hole, and the screw is a countersunk screw; it can be understood that the design of the through hole 110 using a screw and a countersunk hole structure can make the cover 2 of the pressure transmitter more difficult to unscrew, because in order to unscrew the cover 2, the screw must be unscrewed first with a tool such as a screwdriver.

[0080] In some embodiments of the present invention, the screw may be a hexagon socket countersunk screw.

[0081] See also Figure 1 and Figure 2 In some embodiments of the present invention, at least one of the peripheral walls of the table cover 2 is provided with a notch 20 , and the clamping portion 12 is provided to pass through the notch 20 .

[0082] In some embodiments of the utility model, the watch case 3 has two of the slots, and the two slots are arranged on both sides of the threaded hole along the circumference of the watch case 3; the main body 11 of the anti-unscrewing device 1 has two of the plug-in parts 13, and the two plug-in parts 13 are respectively vertically arranged on both sides of the width direction of the main body 11 and are arranged opposite to each other; the two plug-in parts 13 are suitable for being inserted into the two slots.

[0083] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims. In addition, the specification uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. The content of this specification should not be understood as a limitation on the utility model.

Claims

1. An anti-unscrewing device (1) for preventing a cover (2) of a pressure transmitter from being unscrewed from a case (3), wherein the cover (2) is two in number, and the two covers (2) are respectively arranged at two axial ends of the case (3), and the case (3) is provided with a threaded hole and a slot, characterized in that: The anti-unscrewing device (1) comprises: A main body (11) having a through hole (110) along its thickness direction; Two clamping parts (12) are respectively arranged perpendicularly at two ends of the main body (11) in the longitudinal direction and are arranged opposite to each other; An inserting portion (13) is arranged perpendicular to the main body (11), and the extending direction of the inserting portion (13) is the same as the extending direction of the two clamping portions (12); The main body (11) is adapted to be arranged on the outer periphery of the case (3) along the axial direction of the case (3); the two clamping portions (12) are used to clamp the two covers (2) at the axial ends of the pressure transmitter; the plug-in portion (13) is adapted to be inserted into the slot; and the through hole (110) is adapted to be arranged opposite to the threaded hole and tightened via a screw.

2. The anti-unscrewing device (1) according to claim 1, characterized in that: The anti-unscrewing device (1) is provided with two plug-in parts (13), and the two plug-in parts (13) are respectively arranged perpendicularly on two sides of the main body (11) in the width direction and are arranged opposite to each other; The two plug-in parts (13) are suitable for being inserted into the two slots provided on the watch case (3).

3. The anti-unscrewing device (1) according to claim 2, characterized in that: The two plug-in portions (13) are respectively located on two sides of the through hole (110), and the two slots are respectively arranged on two sides of the threaded hole along the circumference of the watch case (3).

4. The anti-unscrewing device (1) according to claim 1, characterized in that: The clamping portion (12) is configured to be suitable for being clamped in a notch (20) on the peripheral wall of the cover (2) along the radial direction of the cover (2).

5. The anti-unscrewing device (1) according to claim 1, characterized in that: The thickness of the portion of the main body (11) where the threaded hole is provided is greater than the thickness of the remaining portions of the main body (11), and the portion of the main body (11) where the threaded hole is provided is suitable for abutting against the portion of the watch case (3) where the threaded hole is provided.

6. The anti-unscrewing device (1) according to claim 4, characterized in that: The main body (11) is suitable for being fitted to the outer circumference of the watch case (3) and / or the outer circumference of the watch cover (2); and / or, The clamping portion (12) is suitable for clamping with the notch (20) along the circumference of the watch cover (2), and / or is suitable for abutting against the end surface of the watch cover (2) facing away from the watch case (3).

7. The anti-unscrewing device (1) according to claim 1, characterized in that: At least one of the main body (11), the clamping portion (12) and the plug-in portion (13) is in the shape of a strip; And / or, the clamping portion (12) and / or the plug-in portion (13) is in the shape of a flat plate.

8. The anti-twisting device (1) according to claim 4, characterized in that: The portion of the clamping portion (12) that is away from the main body (11) is configured to be adapted to have a size along the circumference of the cover (2) that is larger than a size of the notch (20) along the circumference of the cover (2), so that the clamping portion (12) can be clamped with the notch (20) along the radial direction of the cover (2).

9. A pressure transmitter, characterized in that: The pressure transmitter comprises: A case (3) having a threaded hole and a slot; Two watch covers (2) are respectively arranged at two axial ends of the watch case (3); Screws; The anti-unscrewing device (1) according to any one of claims 1 to 8, wherein the main body (11) of the anti-unscrewing device (1) is arranged on the outer periphery of the watch case (3) along the axial direction of the watch case (3), and the through hole (110) of the main body (11) is arranged opposite to the threaded hole of the watch case (3) and is tightened by the screw.

10. The pressure transmitter according to claim 9, characterized in that: The through hole (110) of the main body (11) is a countersunk hole, and the screw is a countersunk screw.

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