Pressure sensor protection mechanism

Abstract

The present invention relates to a pressure sensor protection mechanism, wherein a pressure head guide column is installed on a base, and the pressure head guide column is provided with a chamber for accommodating a pressure sensor, a sensor pressure block, a spring pre-pressure block and a pressure head, the pressure sensor is placed at the bottom of the pressure head guide column chamber, the pressure sensor pressure block is located on the pressure sensor, the pressure sensor pressure block comprises a large diameter portion at the lower end and a small diameter portion at the upper end connected thereto, the spring and the spring pre-pressure block are sleeved on the small diameter portion at the upper end of the pressure sensor pressure block, the spring pre-pressure block can slide on the sensor pressure block while pre-pressing the spring, the pressure head is installed in the chamber of the pressure head guide column, and abuts against the spring pre-pressure block, a limiting groove is provided on the side of the pressure head, and a through hole for a pressure head limiting pin to pass through is provided at the pressure head guide column portion opposite to the limiting groove, and the pressure head limiting pin and the limiting groove are in clearance. The pressure of the press is transmitted to the pressure sensor in real time, and the pressure is monitored in real time; when abnormal, the pressure head is clamped by the pressure head limiting pin to protect the pressure sensor.

Description

Technical Field

[0001] The invention relates to a pressure sensor protection mechanism. Background Art

[0002] Currently, in the pressing process of automotive EGR products, when the equipment is abnormal, the pressure of the press exceeds the measuring range of the pressure sensor and damages the pressure sensor.

[0003] Therefore, it is necessary to design a mechanical protection mechanism for the pressure sensor. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a pressure sensor protection mechanism.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The pressure sensor protection mechanism is characterized in that it includes a base, a pressure head guide column, a sensor pressure block, a spring and a pressure head. The pressure head guide column is installed on the base. The pressure head guide column is provided with a chamber for accommodating the pressure sensor, the sensor pressure block, the spring pre-pressure block and the pressure head. The pressure sensor is placed at the bottom of the pressure head guide column chamber. The pressure sensor pressure block is located on the pressure sensor. The pressure sensor pressure block includes a large diameter portion at the lower end and a small diameter portion at the upper end connected thereto. The spring and the spring pre-pressure block are sequentially mounted on the small diameter portion at the upper end of the pressure sensor pressure block. The spring pre-pressure block can slide on the sensor pressure block while pre-pressing the spring. The pressure head is installed in the chamber of the pressure head guide column and abuts against the spring pre-pressure block. A limiting groove is provided on the side of the pressure head. A through hole is provided at the pressure head guide column portion opposite to the limiting groove for the pressure head limiting pin to pass through. The pressure head limiting pin is radially matched with the limiting groove clearance.

[0007] Furthermore, in the above-mentioned pressure sensor protection mechanism, the pressure head limit pin extends out of the chamber and the external section is connected to the limit pin fixing plate, and the limit pin fixing plate is fixed on the pressure head guide column.

[0008] Furthermore, in the above-mentioned pressure sensor protection mechanism, a through groove is provided at a position where the bottom of the pressure head directly faces the small-diameter portion of the pressure sensor pressure block.

[0009] Furthermore, in the above-mentioned pressure sensor protection mechanism, a positioning column is protrudingly provided on the bottom surface of the pressure head guide column, and correspondingly, a positioning groove cooperating with the positioning column is provided on the base.

[0010] Furthermore, in the above-mentioned pressure sensor protection mechanism, the side of the pressure sensor extends out of the cavity and is packaged by the pressure sensor cover.

[0011] Compared with the prior art, the present invention has significant advantages and beneficial effects, which are specifically embodied in the following aspects:

[0012] The mechanical protection mechanism of the pressure sensor of the present invention is novel in design. On the one hand, it can transmit the pressure of the press to the pressure sensor in real time, so as to achieve the purpose of real-time pressure monitoring by the pressure sensor. On the other hand, even if the equipment is abnormal and the pressure of the press exceeds the measuring range of the pressure sensor, the pressure head is clamped by the pressure head limit pin to prevent the pressure head from continuing to descend, thereby fully protecting the pressure sensor and preventing the pressure sensor from being damaged. The service life of the equipment is improved and the maintenance cost of the equipment is reduced.

[0013] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by practicing the specific embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 : A schematic structural diagram of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, directional terms and order terms are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0018] like Figure 1As shown, the pressure sensor protection mechanism comprises a base 7, a pressure head guide column 3, a sensor pressure block 8, a spring 4 and a pressure head 10. The pressure head guide column 3 is installed on the base 7. The bottom surface of the pressure head guide column 3 is convexly provided with a positioning column. Correspondingly, the base 7 is provided with a positioning groove matched therewith. The pressure head guide column 3 is provided with a chamber for accommodating the pressure sensor 5, the sensor pressure block 8, the spring pre-pressure block 9 and the pressure head 10. The pressure sensor 5 is placed at the bottom of the pressure head guide column chamber. The side of the pressure sensor 5 extends out of the chamber and is packaged by the pressure sensor cover 6. The pressure sensor pressure block 8 is located on the pressure sensor 5. The sensor block 8 includes a large diameter portion at the lower end and a small diameter portion at the upper end connected thereto. The spring 4 and the spring preload block 9 are sequentially mounted on the small diameter portion at the upper end of the pressure sensor block 8. The spring can slide on the sensor block 8 while preloading the spring 4. The pressure head 10 is installed in the chamber of the pressure head guide column 3 and abuts against the spring preload block 9. A through groove is provided at the bottom of the pressure head 10 facing the small diameter portion of the pressure sensor block 8, a limiting groove is provided on the side of the pressure head 10, and a through hole for the pressure head limiting pin 1 to pass through is provided at the position of the pressure head guide column 3 opposite to the limiting groove, and the pressure head limiting pin 1 is radially matched with the limiting groove clearance.

[0019] The external section of the ram limit pin 1 extending out of the chamber is connected to the limit pin fixing plate 2, and the limit pin fixing plate 2 is fixed on the ram guide column 3. The ram limit pin 1 limits the movable position of the ram 10, so that the ram 10 can only move up and down slightly.

[0020] The mechanical protection mechanism of the pressure sensor is fixed on the equipment through the base 7. During normal operation, the pressed product is placed on the pressure head 10, and then the press presses the pressed product. In this way, the pressure of the press can be transmitted to the pressure sensor in real time, so as to achieve the purpose of real-time pressure monitoring by the pressure sensor.

[0021] The principle of the mechanical protection mechanism of the pressure sensor is, for example: the pressure of the pressed product is required to be in the range of a Newton to b Newton (a is less than b), and the elastic force of the spring 4 after being pre-pressed is c Newton (c is greater than b and less than the maximum range of the pressure sensor). In this way, during the operation of the equipment, if the pressure of the press is between a Newton and b Newton, the spring will not be deformed, and the pressure sensor can monitor the pressure of the pressed product in real time; when the pressure of the press is abnormally greater than c Newton, the spring 4 will continue to deform, and the position of the pressure head 10 will move downward. After moving a small amount, it will be stuck and constrained by the pressure head limit pin 1 to prevent it from continuing to move downward. At this time, the extra pressure will be shared by the pressure head limit pin 1, thereby protecting the pressure sensor 5 and preventing the pressure from exceeding its own range.

[0022] To sum up, the mechanical protection mechanism of the pressure sensor of the present invention is novel in design and can transmit the pressure of the press to the pressure sensor in real time, so as to achieve the purpose of real-time pressure monitoring by the pressure sensor. Even if the equipment is abnormal and the pressure of the press exceeds the measuring range of the pressure sensor, the pressure head will be clamped by the pressure head limit pin to prevent the pressure head from continuing to descend, thereby fully protecting the pressure sensor and preventing the pressure sensor from being damaged. The service life of the equipment is increased and the maintenance cost of the equipment is reduced.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0024] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A pressure sensor protection mechanism, characterized in that: The pressure sensor (5) comprises a base (7), a pressure head guide column (3), a pressure sensor pressure block (8), a spring (4) and a pressure head (10), wherein the pressure head guide column (3) is mounted on the base (7), the pressure head guide column (3) is provided with a chamber for accommodating the pressure sensor (5), the pressure sensor pressure block (8), the spring pre-pressure block (9) and the pressure head (10), the pressure sensor (5) is arranged at the bottom of the pressure head guide column chamber, the pressure sensor pressure block (8) is located on the pressure sensor (5), the pressure sensor pressure block (8) comprises a large diameter portion at the lower end and a small diameter portion at the upper end connected thereto, the spring (4) and the spring pre-pressure block (9) are sequentially mounted on the pressure sensor On the upper small diameter portion of the pressure sensor pressure block (8), the spring preload block (9) preloads the spring (4) and can slide on the pressure sensor pressure block (8). The pressure head (10) is installed in the chamber of the pressure head guide column (3) and abuts against the spring preload block (9). A limit groove is provided on the side of the pressure head (10). A through hole for a pressure head limit pin (1) to pass through is provided on the portion of the pressure head guide column (3) opposite to the limit groove. The pressure head limit pin (1) is radially matched with the limit groove gap. The pressure head limit pin (1) extends out of the chamber and is connected to the limit pin fixing plate (2). The limit pin fixing plate (2) is fixed on the pressure head guide column (3).

2. The pressure sensor protection mechanism according to claim 1, characterized in that: A through groove is provided at a position of the bottom of the pressure head (10) directly opposite to the small diameter portion of the pressure sensor pressure block (8).

3. The pressure sensor protection mechanism according to claim 1, characterized in that: A positioning column is convexly provided on the bottom surface of the pressure head guide column (3), and correspondingly, a positioning groove cooperating with the positioning column is provided on the base (7).

4. The pressure sensor protection mechanism according to claim 1, characterized in that: The side of the pressure sensor (5) extends out of the chamber and is sealed by a pressure sensor cover (6).

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