CN217765339U - Impact-resistant all-welded pressure sensor - Google Patents

Abstract

The application discloses shock-resistant all-welded pressure sensor, including instrument head, threaded connection in the instrument head advance the pressure head and be fixed in the monocrystalline silicon sensor in advancing the pressure head through the base, the one end that advances the pressure head and close the instrument head is provided with the mounting groove that corresponds with the base, the one end that advances the pressure head and deviate from the mounting groove is provided with towards the oilhole, wherein, the bottom interval of base and mounting groove sets up to form the cushion chamber, be provided with the buffer that changes the medium flow direction in the cushion chamber, the buffer sets up in the intercommunication department towards oilhole and cushion chamber, and weld in the bottom of mounting groove. This application simple structure, the intercommunication department of towards oilhole and cushion chamber sets up the buffer to through welded fastening, avoid long-time receiving the impact to drop, protection monocrystalline silicon sensor, increase of service life.

Description

Impact-resistant all-welded pressure sensor

Technical Field

The application relates to the field of high-performance and intelligent instruments and meters, in particular to an impact-resistant all-welded pressure sensor.

Background

The pressure transmitter is used in a pressure monitoring system, when the pressure in the system changes, the diaphragm of the monocrystalline silicon sensor is strained, and is converted into corresponding analog voltage and current signals through the signal processing module, and the medium pressure is monitored in real time by matching with display devices such as an instrument head and the like. The existing all-welded monocrystalline silicon pressure sensor adopts a welding mode to directly weld the monocrystalline silicon pressure sensor on a stainless steel pressure inlet head, and the instantaneous impact force of a medium on a diaphragm is large at the moment of starting or stopping and other impact occasions, so that the diaphragm is extremely easy to damage. Accordingly, improvements are needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an impact-resistant all-welded pressure sensor to overcome not enough among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme:

the embodiment of the application discloses impact-resistant all-welded pressure sensor, including instrument head, threaded connection in the instrument head advance the pressure head and be fixed in the monocrystalline silicon sensor in advancing the pressure head through the base, the one end that advances the pressure head and close to the instrument head is provided with the mounting groove that corresponds with the base, the one end that advances the pressure head and deviates from the mounting groove is provided with the flushing hole, wherein, the bottom interval of base and mounting groove sets up to form the cushion chamber, be provided with the buffer that changes the medium flow direction in the cushion chamber, the buffer sets up in the intercommunication department of flushing hole and cushion chamber to weld in the bottom of mounting groove.

Further, in the impact-resistant all-welded pressure sensor, the buffer has a two-section stepped shaft structure and includes a guide section and a turning section, wherein a guide hole communicated with the oil flushing hole is formed in the guide section, a turning hole communicated with the buffer cavity is formed in the turning section, and the turning hole is communicated with the guide hole.

Further, in the above-mentioned impact-resistant all-welded pressure sensor, the diameter of the turning section is greater than the diameter of the guiding section, the guiding section is disposed in the oil flushing hole, the outer circumferential surface of the turning section is welded to the bottom of the mounting groove, and the guiding section and the turning section are integrally formed.

Further, in the impact-resistant all-welded pressure sensor, the guide section and the oil flushing hole are fixedly connected in a threaded manner.

Further, in the above-described impact-resistant all-welded pressure sensor, the diameter of the turning hole does not exceed 1mm.

Furthermore, in the impact-resistant all-welded pressure sensor, an annular first boss protrudes outwards from the opening end of the mounting groove, a second boss protrudes outwards from one end, close to the instrument head, of the outer wall of the base, the second boss is fixed to the first boss in a welded mode, and the first boss and the second boss are the same in diameter.

Further, in the impact-resistant all-welded pressure sensor, a sealing step is arranged at one end, close to the buffer cavity, of the outer wall of the base, and a sealing ring is sleeved on the end.

Compared with the prior art, the utility model has the advantages of: this shock-resistant all-welded pressure sensor simple structure, the intercommunication department of towards oilhole and cushion chamber sets up the buffer to through welded fastening, avoid long-time receiving the impact to drop, protection monocrystalline silicon sensor, increase of service life.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of an impact-resistant all-welded pressure sensor according to an embodiment of the present invention.

Fig. 2 is a schematic view illustrating an installation of the damper according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a buffer according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Exemplarily, referring to fig. 1 to 3, an impact-resistant all-welded pressure sensor includes an instrument head (not shown), a pressure inlet head 1 screwed to the instrument head, and a monocrystalline silicon sensor (not shown) fixed in the pressure inlet head 1 through a base 2, wherein a mounting groove 11 corresponding to the base 2 is provided at one end of the pressure inlet head 1 close to the instrument head, an oil flushing hole 12 is provided at one end of the pressure inlet head 1 away from the mounting groove 11, wherein the base 2 and the bottom of the mounting groove 11 are arranged at an interval to form a buffer cavity, a buffer 3 for changing a flow direction of a medium is provided in the buffer cavity, and the buffer 3 is provided at a communication position of the oil flushing hole 12 and the buffer cavity and welded at the bottom of the mounting groove 11.

Among this technical scheme, instrument head and monocrystalline silicon sensor's structure all belongs to prior art, the central processing of base has the through-hole, monocrystalline silicon sensor through conventional modes such as welding be fixed in the through-hole can, then monocrystalline silicon sensor and base are fixed in the mounting groove as a whole, monocrystalline silicon sensor passes through the cable and connects in the instrument head, the buffer sets up in the intercommunication department of towards oilhole and cushion chamber, set up promptly in the pressure head, when medium normal flow changes, do not produce the impact to the buffer, promptly the buffer does not all receive the impact constantly, improve the fixed intensity of buffer, when medium pressure changes, the medium gets into the pressure head according to the direction of arrow point in figure 1, reach buffer department, the direction changes, do not directly strike monocrystalline silicon sensor's diaphragm, protect monocrystalline silicon sensor's diaphragm, thereby extension pressure sensor's life.

Exemplarily, referring to fig. 2 and 3, the damper 3 is a two-step shaft structure, and includes a guide section 31 and a turning section 32, wherein a guide hole 311 communicating with the oil flushing hole 12 is disposed in the guide section 31, a turning hole 321 communicating with the damper cavity is disposed in the turning section 32, and the turning hole 321 communicates with the guide hole 311.

In the technical scheme, a medium flows through the guide hole from the oil flushing hole and enters the steering hole, so that the flow direction is changed, the diaphragm of the monocrystalline silicon sensor is not directly impacted, the diaphragm of the monocrystalline silicon sensor is protected, and the service life of the pressure sensor is prolonged.

Illustratively, referring to fig. 2 and 3, the diameter of the turning section 32 is larger than that of the guiding section 31, the guiding section 31 is disposed in the oil flushing hole 12, the outer circular surface of the turning section 32 is welded to the bottom of the mounting groove 11, and the guiding section 31 and the turning section 32 are integrally formed.

Among this technical scheme, the guide section forms with turning to section integrated into one piece, guarantees the bulk strength of buffer, and after the guide section inserted the oil hole, can accomplish the location of buffer, convenient welding turned to through laser pulse between the diapire of section and mounting groove to adopt slope welded mode to weld, guarantee the fixed strength of buffer, avoid long-time being strikeed and drop, thereby increase of service life.

For example, referring to fig. 2, the guide section 31 and the oil flushing hole 12 are fixedly connected by means of a threaded connection.

Among this technical scheme, the top processing of towards the oilhole has the internal thread, and the outer wall processing of guide section and the external screw thread that the internal thread corresponds, and the processing is by the tool withdrawal groove between the corresponding terminal surface of external screw thread and the section that turns to, guarantees the guide section and screw in towards the oilhole completely to make the terminal surface of turning to the section laminate in the diapire of mounting groove, convenient welding improves welding strength, thereby improves the fixed strength of buffer.

Illustratively, as shown in FIG. 3, the diameter of the steering hole 321 does not exceed 1mm.

Among this technical scheme, the quantity that turns to the hole is two or three, and equidistant circumference array sets up for the buffer atress is even, and the diameter that turns to the hole is no longer than 1mm, prevents that the impurity granule in the medium from getting into the buffer, protects monocrystalline silicon pressure sensor, increase of service life.

Illustratively, referring to fig. 2, an annular first boss protrudes outwards from an opening end of the mounting groove 11, a second boss protrudes outwards from an end of the outer wall of the base 2 close to the instrument head, the second boss is welded and fixed to the first boss, and the first boss and the second boss have the same diameter.

Among this technical scheme, the location of base can be accomplished to the terminal mounting groove that inserts of base, and the diameter of first boss and second boss is the same, and convenient welding improves the fixed strength of base.

Illustratively, referring to fig. 1, one end of the outer wall of the base 2 close to the buffer cavity is provided with a sealing step, and is sleeved with a sealing ring.

Among this technical scheme, the cross-section of sealing washer is L type structure, and direct cladding is in the sealed step of base, easy to assemble, and the back is fixed to the base, and the inner wall extrusion sealing washer of sealed step and mounting groove forms sealedly, guarantees the leakproofness between base and the mounting groove, and the whole diaphragm that acts on and monocrystalline silicon sensor of medium improves measurement accuracy.

To sum up, this resistant full weld pressure sensor that strikes simple structure, the intercommunication department that dashes oilhole and cushion chamber sets up the buffer to through welded fastening, avoid long-time receiving the impact to drop, protection monocrystalline silicon sensor, increase of service life.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The foregoing is illustrative of the present disclosure and it will be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles of the disclosure, the scope of which is defined by the appended claims.

Claims (7)

1. The utility model provides an impact-resistant all-welded pressure sensor, its characterized in that, including instrument head, threaded connection in the instrument head advance the pressure head and be fixed in the monocrystalline silicon sensor who advances in the pressure head through the base, the one end that advances the pressure head and close the instrument head is provided with the mounting groove that corresponds with the base, the one end that advances the pressure head and deviates from the mounting groove is provided with the oil flushing hole, wherein, the bottom interval of base and mounting groove sets up to form the cushion chamber, be provided with the buffer that changes the medium flow direction in the cushion chamber, the buffer sets up in the intercommunication department in oil flushing hole and cushion chamber to weld in the bottom of mounting groove.

2. The impact resistant all-welded pressure sensor of claim 1, wherein: the buffer is of a two-section step shaft structure and comprises a guiding section and a steering section, wherein a guiding hole communicated with the oil flushing hole is formed in the guiding section, a steering hole communicated with the buffer cavity is formed in the steering section, and the steering hole is communicated with the guiding hole.

3. The impact resistant all-welded pressure sensor of claim 2, wherein: the diameter of the steering section is larger than that of the guiding section, the guiding section is arranged in the oil flushing hole, the outer circular surface of the steering section is welded at the bottom of the mounting groove, and the guiding section and the steering section are integrally formed.

4. The impact resistant all-welded pressure sensor of claim 3, wherein: the guide section is fixedly connected with the oil flushing hole in a threaded connection mode.

5. The impact resistant all-welded pressure sensor of claim 2, wherein: the diameter of the steering hole is not more than 1mm.

6. The impact resistant all-welded pressure sensor of claim 1, wherein: the instrument head is characterized in that an annular first boss protrudes outwards from the opening end of the mounting groove, a second boss protrudes outwards from one end, close to the instrument head, of the outer wall of the base, the second boss is welded and fixed on the first boss, and the first boss and the second boss are the same in diameter.

7. The impact resistant all-welded pressure sensor of claim 1, wherein: one end of the outer wall of the base, which is close to the buffer cavity, is provided with a sealing step, and a sealing ring is sleeved on the outer wall of the base.

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