Overload protection device for pressure sensor

Abstract

The utility model relates to a pressure sensor overload protection device, and belongs to the technical field of sensors. Comprising a first cavity block, a second cavity block, a diaphragm type clamping air cylinder and a pressure sensor, and the first cavity block and the second cavity block are arranged in a matched mode to form a cavity so as to accommodate the diaphragm type clamping air cylinder to continuously convey air to form a pressure cavity; the pressure sensor is connected with a transition plate, and the pressure sensor and the transition plate are arranged in a matched mode so that the pressure sensor can move in the direction of the pressure cavity when bearing abnormal force, and the force borne by the pressure sensor is reduced. The first cavity block, the second cavity block and the diaphragm type clamping air cylinder are arranged in a matched mode to form the pressure cavity, when the pressure sensor bears abnormal force, the pressure sensor moves in the direction of the pressure cavity, the force borne by the pressure sensor is reduced, and the pressure sensor is prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, in particular to an overload protection device for a pressure sensor. Background Art

[0002] A pressure sensor is a mechanical property testing device that senses the pressure being measured and converts it into an electrical signal or other desired form of information according to a specific pattern, thereby satisfying requirements for information transmission, processing, storage, display, recording, and control. Currently, existing pressure sensors use an overload capacity greater than their output power, resulting in an excessively large measuring range and low measurement accuracy. Furthermore, their spring structure has a narrow protection range and lacks adjustability.

[0003] Pressure sensors have a specific range. If the load exceeds the sensor's range during pressure application, the elastic body inside the sensor will undergo irreversible deformation, causing the test system to malfunction, thereby affecting the device's operation and test accuracy. Due to this vulnerability, the load applied to the sensor must be strictly controlled during use to ensure that it remains within the specified range. Therefore, overload protection is a crucial feature of pressure sensors. Overload refers to excessive loads exceeding the sensor's rated load, which can damage the sensor structure. Overload protection prevents damage even when the load exceeds the rated load. However, in actual use, existing overload protection systems fail to consistently ensure that the applied load remains within the specified range, leading to potential damage. While enhanced overload protection devices offer greater overload resistance, they are often bulky, have unadjustable overload pressures, or, if adjustable, are complex, resulting in low reliability and high cost.

[0004] The mechanism principle diagram of the existing pressure sensor overload protection device is as follows: Figure 1As shown: The mechanism primarily consists of a polyurethane pressure head 1, a push button sleeve 2, a push button block 3, a pressure sensor 4, a cylinder connecting plate 5, and an electric cylinder 6. The electric cylinder 6 is arranged horizontally, with the cylinder connecting plate 5 mounted on it. The electric cylinder 6 drives the entire mechanism forward and backward. One end of the pressure sensor 4 is connected to the front end of the cylinder connecting plate 5. The push button sleeve 2 is connected to the push button block 3. The push button sleeve 2 is connected to the front end of the cylinder connecting plate 5. The polyurethane pressure head 1 is connected to the push button block 3. As the entire mechanism moves, the electric cylinder 6 pushes forward, and the polyurethane pressure head 1 presses against the product. When the product is pushed into position normally, the mechanism reaches its position, and the push button block 3 moves backward to press against the pressure sensor 4. The pressure sensor 4 operates normally within 225N. The force required to push the product normally is less than the force required to damage the pressure sensor 4, and the pressure sensor 4 reads a value. However, when a problem occurs with the product, the polyurethane pressure head 1 presses on the product, and the product becomes stuck. At this time, the mechanism continues to push, and the button push block 3 continues to press on the pressure sensor 4. The pressure at this time exceeds the range that the pressure sensor 4 can withstand, directly causing damage to the pressure sensor. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model

[0006] The purpose of the utility model is to solve the problem that the existing pressure sensor may be damaged when subjected to the maximum load pressure for a long time, thereby affecting the normal operation of the pressure sensor.

[0007] 2. Technical solution

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0009] The utility model provides a pressure sensor overload protection device, comprising a cavity block 1, a cavity block 2, a diaphragm-type clamping cylinder and a pressure sensor. The cavity block 1 and the cavity block 2 are arranged in cooperation to form a cavity to accommodate the continuous gas supply of the diaphragm-type clamping cylinder to form a pressure cavity.

[0010] The pressure sensor is connected to a transition plate, and the pressure sensor and the transition plate are cooperatively arranged so that when the pressure sensor is subjected to an abnormal force, the pressure sensor moves toward the pressure cavity, thereby reducing the force applied to the pressure sensor.

[0011] Preferably, the transition plate is connected to a transition mounting plate, and the transition plate and the transition mounting plate are arranged in cooperation to accommodate the cavity.

[0012] Preferably, the pressure sensor is fixedly connected to a sensor pressure block, and a through hole 1 is provided on the transition plate. The through hole 1 is adapted to the sensor pressure block so that when the pressure sensor is subjected to abnormal force, the sensor pressure block is driven to move in the through hole 1 toward the pressure cavity.

[0013] Preferably, the transition plate is fixedly connected to a mounting block, a through hole is formed on the side of the mounting block away from the pressure sensor, a matching pressure rod is arranged in the through hole, and a pressure head adapter block is fixedly connected to the end of the pressure rod away from the pressure sensor, and the radial dimension of the pressure head adapter block is larger than the radial dimension of the pressure rod.

[0014] Preferably, a gap 1 is provided between the pressure head adapter block and the mounting block, and the gap 1 is set to 1 mm to 2 mm.

[0015] Preferably, a second gap is provided between the pressure rod and the pressure sensor, and the second gap is set to 1 mm to 2 mm.

[0016] Preferably, the first gap and the second gap are adapted to each other so that when the pressure head adapter block is fitted with the mounting block, the pressure rod drives the pressure sensor to move toward the pressure chamber.

[0017] Preferably, a positioning sleeve is further included, and the positioning sleeve is arranged between the mounting block and the pressure rod.

[0018] Preferably, the end of the pressure head adapter block away from the pressure rod is connected to a polyurethane pressure head.

[0019] Preferably, the transition mounting plate is fixedly connected to the diaphragm-type clamping cylinder.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0022] The utility model provides a pressure sensor overload protection device, comprising a cavity block 1, a cavity block 2, a diaphragm-type clamping cylinder and a pressure sensor. The cavity block 1 and the cavity block 2 are arranged in cooperation to form a cavity to accommodate the continuous gas supply of the diaphragm-type clamping cylinder to form a pressure cavity. The pressure sensor is connected to a transition plate. The pressure sensor and the transition plate are arranged in cooperation so that when the pressure sensor is subjected to an abnormal force, it moves toward the direction of the pressure cavity, thereby reducing the force applied to the pressure sensor. The present application forms the pressure cavity by cooperating the cavity block 1, the cavity block 2 and the diaphragm-type clamping cylinder. When the pressure sensor is subjected to an abnormal force, the pressure sensor moves toward the direction of the pressure cavity, thereby reducing the force applied to the pressure sensor and preventing the pressure sensor from being damaged. Moreover, when the pressure sensor is in a retreated position, it is constantly subjected to a thrust from the pressure cavity, which is less than the force that can damage the pressure sensor. This solves the problem of existing pressure sensors being damaged when subjected to the maximum load pressure for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of an existing pressure sensor overload protection device;

[0024] Figure 2 This is a structural diagram of a pressure sensor overload protection device of the present utility model;

[0025] Figure 3 It is a cutaway view of the present invention.

[0026] Explanation of the numbers in the schematic diagram:

[0027] 100, pressure head adapter block; 110, polyurethane pressure head; 200, mounting block; 300, pressure rod; 400, pressure sensor; 500, sensor pressure block; 600, diaphragm clamping cylinder; 600A, cavity block one; 600B, cavity block two; 700, transition plate; 800, transition mounting plate; 900, linear module; 1000, servo motor; 1100, positioning sleeve. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] It should be noted that the terms "first," "second," and the like in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatus.

[0030] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0031] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Example 1

[0035] Refer to the attached Figure 2-3 A pressure sensor overload protection device of this embodiment includes a transition mounting plate 800 and a linear module 900. The transition mounting plate 800 is connected to the linear module 900. The linear module 900 is connected to a servo motor 1000. When the servo motor 1000 is started, the linear module 900 drives the transition mounting plate 800 to move to push the product.

[0036] The transition mounting plate 800 is fixedly connected to the transition plate 700, the transition plate 700 is fixedly connected to the mounting block 200, the transition plate 700 is connected to the pressure sensor 400, a through hole is formed on the side of the mounting block 200 away from the pressure sensor 400, a matching pressure rod 300 is arranged in the through hole, the end of the pressure rod 300 away from the pressure sensor 400 is fixedly connected to the pressure head adapter block 100, the radial dimension of the pressure head adapter block 100 is larger than the radial dimension of the pressure rod 300, and the end of the pressure head adapter block 100 away from the pressure rod 300 is connected to the polyurethane pressure head 110.

[0037] When the servo motor 1000 is started, the linear module 900 drives the pressure head adapter block 100 to move forward, and the polyurethane pressure head 110 set on the pressure head adapter block 100 pushes the product to the specified position; when the product reaches the specified position, the pressure head adapter block 100 moves backward and sticks to the mounting block 200, so that the pressure rod 300 moves backward and presses on the surface of the pressure sensor 400. The force of normally pushing the product is less than the force that can damage the pressure sensor 400, and the pressure sensor 400 reads the value.

[0038] It also includes cavity block 1 600A, cavity block 2 600B and a diaphragm-type clamping cylinder 600. The cavity block 1 600A and the cavity block 2 600B are arranged in conjunction with each other to form a cavity to accommodate the continuous gas supply of the diaphragm-type clamping cylinder 600 to form a pressure cavity; the transition plate 700 is arranged in conjunction with the transition mounting plate 800 to accommodate the cavity.

[0039] The pressure sensor 400 and the transition plate 700 are configured in conjunction with each other so that when subjected to an abnormal force, the pressure sensor 400 moves toward the pressure chamber, reducing the force applied to the pressure sensor 400. If the product becomes stuck for some reason during the pushing process, and the ram adapter block 100 is unable to push the product normally, the ram adapter block 100 moves backward to abut against the mounting block 200, causing the pressure rod 300 to move backward and press against the pressure sensor 400. At this point, the force applied to the pressure sensor 400 is greater than the force normally applied by the ram adapter block 100 to push the product. When subjected to the abnormal force, the pressure sensor 400 moves backward toward the pressure chamber, contacting it. The diaphragm clamping cylinder 600 outputs thrust through the pressure chamber to reduce the force applied to the pressure sensor 400 and prevent damage to the pressure sensor 400. When the equipment has not eliminated the stuck fault, the pressure sensor 400 continues to press against the pressure chamber. At this time, the force applied to the pressure sensor 400 is always the thrust output by the diaphragm clamping cylinder 600 through the pressure chamber. The thrust is smaller than the force that can damage the pressure sensor 400, thus protecting the pressure sensor 400 from damage.

[0040] The pressure sensor 400 is fixedly connected to the sensor pressing block 500, and the transition plate 700 is provided with a through hole 1, which is adapted to the sensor pressing block 500 so that when the pressure sensor 400 is subjected to force, the sensor pressing block 500 is driven to move in the through hole 1 toward the pressure cavity.

[0041] A gap one is provided between the pressure head adapter block 100 and the mounting block 200, and the gap one is set to 1mm~2mm; a gap two is provided between the pressure rod 300 and the pressure sensor 400, and the gap two is set to 1mm~2mm; the gap one and the gap two are adapted to each other so that when the pressure head adapter block 100 and the mounting block 200 are in contact, the pressure rod 300 drives the pressure sensor 400 to move toward the pressure cavity.

[0042] It also includes a positioning sleeve 1100, which is arranged between the mounting block 200 and the pressure rod 300. The positioning sleeve 1100 is used to keep the pressure rod 300 in the through hole of the mounting block 200 to prevent the pressure rod 300 from moving or rotating, thereby improving its use effect.

[0043] The transition mounting plate 800 is fixedly connected to the diaphragm-type clamping cylinder 600 .

[0044] The above-mentioned embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, which all fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. A pressure sensor overload protection device, characterized in that: It comprises a cavity block 1 (600A), a cavity block 2 (600B), a diaphragm-type clamping cylinder (600) and a pressure sensor (400); the cavity block 1 (600A) and the cavity block 2 (600B) are arranged in cooperation to form a cavity to accommodate the continuous gas supply of the diaphragm-type clamping cylinder (600) to form a pressure cavity; The pressure sensor (400) is connected to a transition plate (700), and the pressure sensor (400) and the transition plate (700) are arranged in cooperation so that the pressure sensor (400) moves toward the pressure cavity when subjected to an abnormal force, thereby reducing the force applied to the pressure sensor (400).

2. A pressure sensor overload protection device according to claim 1, characterized in that: The transition plate (700) is connected to a transition mounting plate (800), and the transition plate (700) and the transition mounting plate (800) are arranged in cooperation to accommodate the cavity.

3. The pressure sensor overload protection device according to claim 2, characterized in that: The pressure sensor (400) is fixedly connected to a sensor pressing block (500), and a through hole 1 is provided on the transition plate (700). The through hole 1 is adapted to the sensor pressing block (500), so that when the pressure sensor (400) is subjected to an abnormal force, the sensor pressing block (500) is driven to move in the through hole 1 toward the pressure cavity.

4. A pressure sensor overload protection device according to claim 3, characterized in that: The transition plate (700) is fixedly connected to a mounting block (200), a through hole is formed on a side of the mounting block (200) away from the pressure sensor (400), a matching pressure rod (300) is arranged in the through hole, and a pressure head adapter block (100) is fixedly connected to one end of the pressure rod (300) away from the pressure sensor (400), and the radial dimension of the pressure head adapter block (100) is larger than the radial dimension of the pressure rod (300).

5. The pressure sensor overload protection device according to claim 4, characterized in that: A gap 1 is provided between the pressure head adapter block (100) and the mounting block (200), and the gap 1 is set to 1 mm to 2 mm.

6. The pressure sensor overload protection device according to claim 5, characterized in that: A second gap is provided between the pressure rod (300) and the pressure sensor (400), and the second gap is set to 1 mm to 2 mm.

7. The pressure sensor overload protection device according to claim 6, characterized in that: The first gap and the second gap are adapted to each other so that when the pressure head adapter block (100) is fitted with the mounting block (200), the pressure rod (300) drives the pressure sensor (400) to move toward the pressure cavity.

8. The pressure sensor overload protection device according to claim 7, characterized in that: It also includes a positioning sleeve (1100), which is arranged between the mounting block (200) and the pressure rod (300).

9. The pressure sensor overload protection device according to claim 8, characterized in that: One end of the pressure head adapter block (100) away from the pressure rod (300) is connected to a polyurethane pressure head (110).

10. The pressure sensor overload protection device according to claim 9, characterized in that: The transition mounting plate (800) is fixedly connected to the diaphragm-type clamping cylinder (600).

Images