A high pressure sensor

Abstract

The utility model relates to the technical field of sensors, and specifically to a high-pressure pressure sensor, comprising a sensor housing, a pressure sensitive element, a cantilever beam, a transfer beam and a diaphragm located from top to bottom in the sensor housing, an annular mounting plate with two first limiting holes and two fixed and disassembled units, the sensor housing is connected to a pipeline through a connector, the diaphragm is located in the annular mounting plate, the sensor housing has a first movable cavity, a second movable cavity, a rotating groove and a second limiting hole that are connected; the fixed and disassembled unit comprises a sliding block, a limiting column, a supporting reset spring, a rack plate, two rollers and a gear, the rack plate is driven downward by rotating the gear, the gear below the rack plate acts on the inclined surface of the sliding block, drives the sliding block to move away from the sensor housing, and then drives the limiting column to move and retract into the first movable cavity, releases the limiting of the annular mounting plate, thereby releasing the limiting of the sensing element, and is convenient for detecting and replacing the sensing element.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a high-pressure pressure sensor. Background Art

[0002] Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments. The current pressure sensor for measuring pipelines is that the pressure of the medium in the pipeline directly acts on the diaphragm of the sensor, causing the diaphragm to produce a micro-displacement proportional to the medium pressure. Due to the high pressure of the pipeline medium, the diaphragm of the sensor is affected by the medium for a long time, which will weaken the pressure resistance of the diaphragm and damage it.

[0003] The prior art CN220339564U discloses a pressure sensor for measurement with strong pressure resistance, including a sensor housing, a pressure sensitive element, a cantilever beam, a transfer beam and a sensing element of a diaphragm installed in the sensor housing from top to bottom, a lead connected to the pressure sensitive element, a connector connected to the sensor housing and a pipeline, and a pressure-resistant device installed on the connector. The pressure-resistant device includes a shell installed on the connector, a round block slidably connected to the shell, a round plate located above the connector, a vertical rod fixedly connected between the round plate and the round block, a spring sleeved on the vertical rod and located in the shell. When the medium in the pipeline enters the sensor housing through the connector, the medium pressure acts on the round plate, the round plate moves up, and the vertical rod moves up in the through hole in the shell. The vertical rod drives the round block to move up, compressing the spring. The elasticity of the spring can reduce the direct pressure of the medium on the diaphragm to prevent damage.

[0004] However, the pressure-resistant device in the above structure can only reduce the direct pressure of the medium on the diaphragm. As the use time increases, the diaphragm will be damaged and need to be replaced due to the long-term pressure. The above structure is not convenient for replacing the sensing element. Utility Model Content

[0005] The purpose of the utility model is to provide a high-pressure pressure sensor, which solves the problem that the pressure-resistant device in the prior art can only reduce the pressure of the medium directly on the diaphragm, and as the use time increases, the diaphragm will malfunction and be damaged under the action of pressure for a long time and needs to be replaced, and the above structure is not convenient for replacing the sensing element.

[0006] To achieve the above-mentioned purpose, the utility model provides a high-pressure pressure sensor, including a sensor housing, in which a pressure sensitive element, a cantilever beam, a transfer beam and a diaphragm are installed from top to bottom, the sensor housing is connected to a pipeline through a connector, and also includes an annular mounting plate and two fixing and disassembling units, the diaphragm is located in the annular mounting plate, the annular mounting plate has two first limiting holes, the sensor housing has two first moving cavities, two second moving cavities, two rotating grooves and two second limiting holes, and the first moving cavity, the second moving cavity and the rotating groove are connected;

[0007] The fixed disassembly unit includes a sliding block, a limiting column, a supporting reset spring, a rack plate, a roller and a gear. The sliding block is slidably connected in the first moving cavity and the second moving cavity. The limiting column is fixedly connected to the sliding block and passes through the second limiting hole and the first limiting hole. The supporting reset spring is located between the sliding block and the sensor housing. The sliding block has a sliding groove. The rack plate is located above the sliding block. The roller is rotatably connected to the rack plate and is located on the sliding groove. The gear is meshed with the rack plate and is located in the rotating groove.

[0008] Among them, the fixed disassembly unit also includes a telescopic cylinder and a telescopic rod. The telescopic cylinder is fixedly connected to the second movable cavity. One end of the telescopic rod is fixedly connected to the sliding block, and the other end is slidably connected to the telescopic cylinder. The supporting reset spring is sleeved outside the telescopic rod and the telescopic cylinder.

[0009] The fixing and disassembling unit further comprises a fixing assembly for fixing the gear and the sensor housing.

[0010] Among them, the gear has a positioning hole, and the fixed component includes a moving rod, a supporting block, a limit block and a limit spring. The moving rod is slidably connected in the rotating groove and penetrates into the positioning hole. The supporting block is fixedly connected to the moving rod, the limit block is slidably connected to the sensor housing and supports the support block, and the limit spring is arranged between the limit block and the sensor housing.

[0011] The high-pressure pressure sensor further includes a limiting unit for limiting the position of the annular mounting plate and the cantilever beam.

[0012] The limiting unit includes a first annular component and a second annular component, both of which are fixedly connected to the sensor housing, the first annular component is located above the cantilever beam, and the second annular component is located below the first annular component.

[0013] The annular mounting plate has an annular step, and the annular step is located on a side of the second annular component away from the first annular component.

[0014] Wherein, the limiting unit further includes a plurality of supporting columns, and the plurality of supporting columns are fixedly connected between the diaphragm and the cantilever beam.

[0015] The sensor housing also has two third movable cavities, which are connected to the second movable cavities; the fixing and disassembling unit also includes a locking assembly for fixing the sensor housing and the connector, and the locking assembly is located in the third movable cavity.

[0016] The connector has a limiting groove, and the locking assembly includes a fixed block and a clamping block. The fixed block is fixedly connected to the bottom of the sliding block, and the clamping block is fixedly connected to the fixed block and inserted into the limiting groove.

[0017] The utility model discloses a high-pressure pressure sensor, which is slidably connected to the first moving cavity and the second moving cavity of the sensor housing through a sliding block, a limiting column is fixedly connected to the sliding block and passes through the second limiting hole and the first limiting hole, a supporting reset spring is located between the sliding block and the sensor housing, the sliding block has a sliding groove, a rack plate is located above the sliding block, a roller is rotatably connected to the rack plate and is located on the sliding groove, and a gear is meshed with the rack plate and is located in the rotating groove. The rack plate is driven downward by rotating the gear, and the gear below the rack plate acts on the inclined surface of the sliding block, driving the sliding block to move away from the sensor housing, thereby driving the limiting column to move and retract into the first moving cavity, releasing the limit on the annular mounting plate, thereby releasing the limit on the sensing element, and facilitating the detection and replacement of the sensing element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the overall structure of the high-pressure pressure sensor of an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 It is a top view of the high-pressure pressure sensor of the embodiment of the utility model as a whole;

[0022] Figure 4 yes Figure 3 Sectional view along BB;

[0023] Figure 5 yes Figure 4 Enlarged view of point C in the middle;

[0024] Figure 6 yes Figure 4 The enlarged view of point D in the middle;

[0025] Figure 7 yes Figure 4 Enlarged view of point E in the middle;

[0026] Figure 8 It is a structural schematic diagram of a fixing and disassembling unit of an embodiment of the utility model;

[0027] Fig. 9 yes Figure 8 The enlarged view of F in the middle;

[0028] Fig.10 yes Figure 8 Enlarged view of point G in the middle.

[0029] In the figure: 101-sensor housing, 102-pressure sensitive element, 103-cantilever beam, 104-transmission beam, 105-diaphragm, 106-connector, 107-annular mounting plate, 108-first limiting hole, 109-second limiting hole, 110-first moving cavity, 111-second moving cavity, 112-rotating groove, 113-sliding block, 114-limiting column, 115-support reset spring, 116-rack plate, 117-roller, 118-gear, 119-slide groove, 12 0-telescopic cylinder, 121-telescopic rod, 122-positioning hole, 123-moving rod, 124-holding block, 125-limiting block, 126-limiting spring, 127-first annular component, 128-second annular component, 129-annular step, 130-support column, 131-third movable cavity, 132-limiting groove, 133-fixing block, 136-third annular component, 137-sealing gasket, 138-annular groove, 139-oblique step, 140-positioning groove, 141-locking block. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] See also Figures 1 to 10 In this embodiment, the high pressure sensor includes a sensor housing 101, a connector 106, an annular mounting plate 107 and two fixing and disassembly units, such as Figure 4 As shown, a pressure sensitive element 102, a cantilever beam 103, a transfer beam 104 and a diaphragm 105 are installed in a sensor housing 101 from top to bottom. The diaphragm 105 is located in an annular mounting plate 107. The pressure sensitive element 102 is connected to a lead, the lead is connected to a cable, and the cable is connected to an electronic module assembly. The lead is a spiral elastic lead. When the annular mounting plate 107, the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 move up and down, the lead can be extended or shortened. The fixing and disassembling unit is used to fix the annular mounting plate 107 during normal use, and to release the fixing of the annular mounting plate 107 in case of failure. The connector 106 is threadedly connected to the sensor housing 101, and the connector 106 is connected to the pipeline. The medium enters the connector 106 through the pipeline, and then enters the sensor housing 101, and is transmitted by the diaphragm 105, the transfer beam 104, and the cantilever beam 103 to the pressure sensitive element 102 sealed and attached to the upper surface of the cantilever beam 103. The pressure sensitive element 102 includes four resistors that form a Wheat bridge, of which the two resistors on the opposite side of the bridge arm are strain resistors, and the other two resistors are fixed resistors. The pressure sensitive element 102 can convert the strain of the beam into an electrical signal, and connect it to an external device through leads and cables for signal processing.

[0032] Specifically, Figure 4 , Figure 5 and Fig.10 As shown, the annular mounting plate 107 has two first limiting holes 108, the sensor housing 101 has two vertically arranged first moving chambers 110, two horizontally arranged second moving chambers 111, two rotating grooves 112 and two second limiting holes 109 connected to the interior of the sensor housing 101, the first moving chamber 110, the second moving chamber 111 and the rotating groove 112 are connected; the fixed disassembly unit includes a sliding block 113, a limiting column 114, a supporting reset spring 115, a rack plate 116, a roller 117 and a gear 118, the sliding block 113 is slidably connected in the first moving chamber 110 and the second moving chamber 111, the cross-sectional area of ​​the sliding block 113 is a trapezoid, with a first right-angled side, a second right-angled side, a third right-angled side and a hypotenuse, and a first right-angled side, a second right-angled side, a third right-angled side and a hypotenuse. The length of the right-angled side is smaller than the length of the third right-angled side, and the hypotenuse is located on the side facing the roller 117; the limiting column 114 is fixedly connected to the sliding block 113, passes through the second limiting hole 109 and the first limiting hole 108, and is located on the side facing the first right-angled side; the supporting reset spring 115 is located between the sliding block 113 and the sensor housing 101, the sliding block 113 has a slide groove 119, the slide groove 119 is located on the hypotenuse of the sliding block 113, the rack plate 116 is located above the sliding block 113, and has a plurality of teeth on the side away from the sliding block 113, the roller 117 is rotatably connected to the rack plate 116, and is located on the slide groove 119, the gear 118 is meshed with the rack plate 116, and is located in the rotating groove 112, and the rotating groove 112 is connected to the outside.

[0033] like Figure 4 As shown, when the annular mounting plate 107 and the sensing element including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 do not need to be replaced, the limiting column 114 passes through the second limiting hole 109 and is inserted into the first limiting hole 108, and the annular mounting plate 107 is fixed in the sensor housing 101. Since the cantilever beam 103 is connected through the transfer beam 104, the pressure sensitive element 102 is mounted on the cantilever beam 103, and the diaphragm 105 is mounted on the annular mounting plate 10 7, the annular mounting plate 107 and the sensing element including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 are fixed in the sensor housing 101, at this time, most of the sliding block 113 is located in the first movable cavity 110, the support reset spring 115 is in a compressed state and is located in the second movable cavity 111, and the roller 117 is located on the side of the slide groove 119 of the sliding block 113 close to the support reset spring 115, that is, on the side close to the third right-angle side.

[0034] When it is necessary to release the fixation of the annular mounting plate 107 and the sensing elements including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 for fault detection and replacement, the gear 118 is rotated toward the inside of the sensor housing 101. Since the gear 118 is meshed with the rack plate 116, the rack plate 116 is driven to move downward. Since the roller 117 is rotatably connected to the bottom of the rack plate 116 and is located on the inclined surface of the sliding block 113, the sliding block 113 is driven to move in the direction of the support reset spring 115. The support reset spring 115 is further compressed until most of the sliding block 113 is located in the second movable cavity 111, and the limiting column 114 is moved out of the second limiting hole 109 and completely enters the first movable cavity 110 through the first limiting hole 108. At this time, the limiting column 114 is separated from the annular mounting plate 107, and the annular mounting plate 107 is not limited. , the annular mounting plate 107 and the sensing elements including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 fall onto the circular plate of the pressure-resistant device of CN220339564U, the connector 106 is rotated, and the sensor housing 101 is removed. Due to the setting of the pressure-resistant device, the falling annular mounting plate 107 and the sensing elements including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 can be damped, and the sensing elements including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 can be fault-detected, and whichever component is faulty can be replaced. At the same time, the spiral elastic lead facilitates pulling the annular mounting plate 107 and the sensing elements including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 to the outside of the sensor housing 101 for fault detection and replacement.

[0035] Preferably, if Figure 5 As shown, the fixed disassembly unit further includes a telescopic cylinder 120 and a telescopic rod 121. The telescopic cylinder 120 is fixedly connected to the second moving cavity 111. One end of the telescopic rod 121 is fixedly connected to the sliding block 113, and the other end is slidably connected to the telescopic cylinder 120. The support reset spring 115 is sleeved outside the telescopic rod 121 and the telescopic cylinder 120. When the limit column 114 fixes the annular mounting plate 107, most of the sliding block 113 is located in the first moving cavity 110, the support reset spring 115 is in a compressed state, and a small part of the telescopic rod 121 is located in the telescopic cylinder 120. When the fixing of the annular mounting plate 107 needs to be released, the rack plate 116 moves downward to drive the roller 117 to resist the inclined surface of the sliding block 113, so that the sliding block 113 moves toward the direction of the support reset spring 115, and the support reset spring 115 is further compressed, driving most of the telescopic rod 121 to move into the telescopic cylinder 120, so that the movement is more stable.

[0036] like Figure 8 , Fig. 9As shown, the fixing and disassembling unit also includes a fixing assembly for fixing the gear 118 and the sensor housing. Specifically, the gear 118 has a positioning hole 122, and the fixing assembly includes a moving rod 123, a holding block 124, a limiting block 125 and a limiting spring 126. The moving rod 123 is slidably connected to the rotating groove 112 and penetrates into the positioning hole 122. The holding block 124 is fixedly connected to the moving rod 123. The limiting block 125 is slidably connected to the sensor housing 101 and abuts against the holding block 124. The limiting spring 126 is arranged between the limiting block 125 and the sensor housing 101. When the limiting column 114 fixes the annular mounting plate 107, the supporting reset spring 115 holds the sliding block 113 in the first movable chamber 110 and does not move. The bottom of the rack plate 116 is located on the side of the inclined surface of the sliding block 113 facing the supporting reset spring 115, and the top of the rack plate 116 is engaged with the gear 118 and does not move. At this time, the moving rod 123 and the center line of the positioning hole 122 do not coincide, the moving rod 123 is not inserted into the positioning hole 122, the supporting block 124 and the limiting block 125 are not in the same plane, the limiting spring 126 is in a freely extended state, and the distance between the limiting block 125 and the gear 118 is greater than the distance between the supporting block 124 and the gear 118. When the annular mounting plate 107 needs to be released, a finger is inserted into the rotating groove 112 to rotate the gear 118 toward the center of the sensor housing 101, and the gear 118 drives the rack plate 116 to move downward, and then the roller 117 abuts against the inclined surface of the sliding block 113, so that the limiting column 114 is retracted from the second limiting hole 109 and the first limiting hole 108 into the first moving cavity 110. At this time, the center line of the positioning hole 122 coincides with the center line of the moving rod 123, and the positioning column 114 moves toward the gear 118. The rod 123 is inserted into the positioning hole 122, and the limit block 125 is pressed in the direction away from the gear 118, the limit spring 126 is compressed, and the abutment block 124 is rotated so that the abutment block 124 is located between the limit block 125 and the gear 118. The limit block 125 is released, and the limit spring 126 is stretched to store force, and the limit block 125 abuts against the positioning groove 140 on the abutment block 124, thereby fixing the gear 118 to prevent rotation, and then the limit column 114 is continuously located in the first moving cavity 110. At this time, the annular mounting plate 107 and the sensing elements including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 can be detected and replaced.

[0037] like Figure 4As shown, the high-pressure pressure sensor further includes a limiting unit for limiting the position of the annular mounting plate 107 and the cantilever beam 103. Preferably, the limiting unit includes a first annular component 127 and a second annular component 128, both of which are fixedly connected to the sensor housing 101, the first annular component 127 is located above the cantilever beam 103, and the second annular component 128 is located below the first annular component 127. The annular mounting plate 107 has an annular step 129, which is located on the side of the second annular component 128 away from the first annular component 127. The diameter of the center hole of the first annular component 127 is smaller than the diameter of the center hole of the second annular component 128, and the outer diameter of the cantilever beam 103 is equal to the diameter of the center hole of the second annular component 128; the first annular component 127 can limit the cantilever beam 103, and the second annular component 128 and the annular step 129 can limit the annular mounting plate 107 and the diaphragm 105, which is convenient for installing a new annular mounting plate 107 and a sensing element including a pressure sensitive element 102, a cantilever beam 103, a transfer beam 104 and a diaphragm 105, so that the limiting column 114 can be accurately inserted into the second limiting hole 109 of the annular mounting plate 107. Specifically, the faulty sensing element including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 and the annular mounting plate 107 are removed, and the sensing element including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105 and the annular mounting plate 107 are replaced with new ones, and the new pressure sensitive element 102 is connected to the lead wire, and the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the annular mounting plate 107 are placed in sequence through the connection entrance of the sensor housing 101 and the connector 106. 07 and diaphragm 105, pressure sensitive element 102 is located on the side of first annular component 127 away from the connection entrance, cantilever beam 103 is supported between first annular component 127 and second annular component 128, transfer beam 104 is located in the center hole of second annular component 128, part of annular mounting plate 107 is located in the center hole of second annular component 128, another part is located on the side of second annular component 128 facing connector 106, annular step 129 of annular mounting plate 107 is located below second annular component 128. This position ensures that the center line of second limiting hole 109 coincides with the center line of limiting column 114, which is convenient for positioning, while first annular component 127 and second annular component 128 provide support, no manual continuous picking is required, and it is convenient for operators to replace. At the same time, it reduces the vibration of external force in daily work of high-pressure pressure sensor, which may cause loosening or even detachment, thereby reducing the detection accuracy.

[0038] Meanwhile, the limiting unit further includes a plurality of supporting columns 130, and the plurality of supporting columns 130 are fixedly connected between the diaphragm 105 and the cantilever beam 103. The plurality of supporting columns 130 increase the structural stability of the cantilever beam 103 and the diaphragm 105.

[0039] In addition, if Figure 5 As shown, the sensor housing 101 also has two third movable cavities 131, and the third movable cavity 131 is connected to the second movable cavity 111; the fixing and disassembly unit also includes a locking assembly for fixing the sensor housing 101 and the connecting head 106, and the locking assembly is located in the third movable cavity 131, which can release the limit of the annular mounting plate 107 by the limit column 114, and release the limit of the sensor housing 101 and the connecting head 106, thereby achieving the stability of the structure during the limit connection and the effect of facilitating removal and separation when the limit is released.

[0040] Specifically, Figure 5 , Fig.10 As shown, the connector 106 has a limiting groove 132, and the locking assembly includes a fixed block 133 and a snap block 141. The fixed block 133 is fixedly connected to the bottom of the sliding block 113, and the snap block 141 is fixedly connected to the fixed block 133 and inserted into the limiting groove 132. The third movable cavity 131 is located on a side close to the connector 106. When the limiting column 114 limits the annular mounting plate 107, the sliding block 113 is located in the first movable cavity 110, the fixed block 133 is located on a side close to the first limiting hole 108, and the snap block 141 is inserted into the limiting groove 132, so that the sensor housing 101 and the connector 106 are locked and fixed. When it is necessary to replace the sensing element including the pressure sensitive element 102, the cantilever beam 103, the transfer beam 104 and the diaphragm 105, the rack plate 116 moves downward to drive the roller 117 to move on the inclined surface of the sliding block 113, so that the sliding block 113 moves in the direction of the supporting reset spring 115, until the limiting column 114 moves out of the second limiting hole 109 and the first limiting hole 108, retracts into the first moving cavity 110, and fixes the gear 118. Since the fixing block 133 is fixed below the sliding block 113, The fixing block 133 is driven to move toward the direction of the second movable cavity 111, and the fixing block 133 is fixedly connected to the engaging block 141, thereby driving the engaging block 141 to move in the direction away from the limiting groove 132, and then driving the engaging block 141 to move out of the limiting groove 132, releasing the limiting of the sensor housing 101 and the connecting head 106, and then rotating the sensor housing 101 to separate the sensor housing 101 from the connecting head 106, so that the sensor housing 101 can be removed and the sensing element can be replaced.

[0041] In addition, if Figure 4 , Figure 6As shown, the high-pressure pressure sensor also includes a sealing unit, which includes a third annular component 136 and a sealing gasket 137. The sensor housing 101 also has an annular groove 138. The third annular component 136 is fixedly connected to the connector 106 and is rotatably connected in the annular groove 138. The sealing gasket 137 is fixedly connected in the annular groove 138 and is located between the third annular component 136 and the sensor housing 101. When the sensor housing 101 is threadedly rotatably connected to the connector 106, the third annular component 136 rotates in the annular groove 138 until the sensor housing 101 and the connector 106 cannot rotate. The third annular component 136 abuts against the sealing gasket 137 located in the annular groove 138 to play a sealing role. It can prevent liquids such as rainwater from entering the sensor housing 101 and causing erosion to the sensing element, thereby improving the detection accuracy of the sensing element, increasing the service life, and reducing the cost. The connector 106 has an oblique step 139, and the oblique step 139 faces the side away from the sensor housing 101. The setting of the inclined step 139 makes it difficult for rainwater to enter the sensor housing 101 through the connection position between the connector 106 and the sensor housing 101. At the same time, when the high-pressure sensor is located at a place with a high water level, due to the setting of the third annular component 136, only a small amount of rainwater can enter the outer side of the third annular component 136, and is blocked by the sealing gasket 137 and falls down, flowing out through the inclined step 139, and will not enter the interior of the sensor housing 101.

[0042] The working / implementation / usage principle of the utility model is: when the high-pressure pressure sensor is working normally, the pressure sensitive element 102 is located above the first annular component 127, the cantilever beam 103 is located at the connection between the first annular component 127 and the second annular component 128, the transfer beam 104 and the support column 130 are located in the center hole of the second annular component 128, the annular step 129 of the annular mounting plate 107 is located below the second annular component 128, a part of the annular mounting plate 107 is located in the center hole of the second annular component 128, and the other part is located below the second annular component 128, and the diaphragm 105 is located in the annular mounting plate 107. The limiting column 114 is located in the second limiting hole 109 of the annular mounting plate 107, the sliding block 113 is located in the first moving cavity 110, the support reset spring 115 is compressed, most of the telescopic rod 121 is located outside the telescopic cylinder 120, the rack plate 116 is located on the inclined surface of the sliding block 113, and is located on the side close to the support reset spring 115, the moving rod 123 is not inserted into the positioning hole 122, the locking block 141 is inserted into the limiting groove 132, the sensor housing 101 is threadedly connected to the connector 106, the medium enters the connector 106 through the pipeline, and then enters the sensor housing 101, and the pressure is measured by the signal processing element composed of the sensing element including the diaphragm 105, the transfer beam 104, the cantilever beam 103 and the pressure sensitive element 102 and the leads and cables. When fault detection or replacement of the sensing element is required, the finger enters the rotating groove 112 and rotates the gear 118 toward the center of the sensor housing 101. The gear 118 drives the meshing rack plate 116 to move downward, so that the roller 117 connected to the bottom of the rack plate 116 moves on the inclined surface of the sliding block 113, driving the sliding block 113 to move in the direction of the supporting reset spring 115, further compressing the supporting reset spring 115, and the telescopic rod 121 moves into the telescopic cylinder 120. The sliding block 113 drives the limiting column 114 to move out of the second limiting hole 109 and retract from the first limiting hole 108 to the first moving cavity 110, thereby releasing the restriction on the annular mounting plate 107. The sensing elements including the diaphragm 105, the transfer beam 104, the cantilever beam 103 and the pressure sensitive element 102 and the annular mounting plate 107 fall into the pressure-resistant device of the prior art CN220339564U under the action of gravity. At the same time, the fixing block 133 drives the engaging block 141 to move out of the limiting groove 132, releasing the limiting of the sensor housing 101 and the connector 106. At this time, the moving rod 123 is inserted into the positioning hole 122, pressing the sliding block 113, compressing the limiting spring 116, rotating the abutting block 124, so that the abutting block 124 is located between the sliding block 113 and the gear 118, releasing the sliding block 113, and the limiting spring 116 stretches to drive the sliding block 113 to insert into the positioning groove 140 on the abutting block 124 for fixing, thereby limiting the gear 118.Then, the sensor housing 101 and the connector 106 are rotated to separate them, and the sensing element on the anti-pressure device can be inspected and replaced. The sensor housing 101 includes an upper cover plate, an inner cylinder and an outer cylinder. When installing internal components, the components of the outer cylinder are installed first, and then the inner cylinder and the outer cylinder are connected by welding, and then the components in the inner cylinder are installed, and finally the inner cylinder and the cover plate are welded.

[0043] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A high-pressure pressure sensor, comprising a sensor housing, in which a pressure sensitive element, a cantilever beam, a transfer beam and a diaphragm are installed from top to bottom, and the sensor housing is connected to a pipeline through a connector, characterized in that: It also includes an annular mounting plate and two fixing and disassembling units, the diaphragm is located in the annular mounting plate, the annular mounting plate has two first limiting holes, the sensor housing has two first moving cavities, two second moving cavities, two rotating grooves and two second limiting holes, and the first moving cavities, the second moving cavities and the rotating grooves are connected; The fixed disassembly unit includes a sliding block, a limiting column, a support reset spring, a rack plate, a roller and a gear. The sliding block is slidably connected to the first moving cavity and the second moving cavity. The limiting column is fixedly connected to the sliding block and passes through the second limiting hole and the first limiting hole. The support reset spring is located between the sliding block and the sensor housing. The sliding block has a sliding groove. The rack plate is located above the sliding block. The roller is rotatably connected to the rack plate and is located on the sliding groove. The gear is meshed with the rack plate and is located in the rotating groove.

2. The high pressure sensor according to claim 1, characterized in that: The fixed and disassembly unit also includes a telescopic cylinder and a telescopic rod, the telescopic cylinder is fixedly connected to the second movable cavity, one end of the telescopic rod is fixedly connected to the sliding block, and the other end is slidably connected to the telescopic cylinder, and the support reset spring is sleeved outside the telescopic rod and the telescopic cylinder.

3. The high pressure sensor according to claim 1, characterized in that: The fixing and disassembling unit further comprises a fixing assembly for fixing the gear and the sensor housing.

4. The high pressure sensor according to claim 3, characterized in that: The gear has a positioning hole, and the fixed assembly includes a moving rod, a supporting block, a limit block and a limit spring. The moving rod is slidably connected in the rotating groove and penetrates into the positioning hole. The supporting block is fixedly connected to the moving rod. The limit block is slidably connected to the sensor housing and supports the supporting block. The limit spring is arranged between the limit block and the sensor housing.

5. The high pressure sensor according to claim 1, characterized in that: The high-pressure pressure sensor further includes a limiting unit for limiting the positions of the annular mounting plate and the cantilever beam.

6. The high pressure sensor according to claim 5, characterized in that: The limiting unit includes a first annular component and a second annular component, both of which are fixedly connected to the sensor housing, the first annular component is located above the cantilever beam, and the second annular component is located below the first annular component.

7. The high pressure sensor according to claim 6, characterized in that: The annular mounting plate has an annular step, and the annular step is located at a side of the second annular component away from the first annular component.

8. The high pressure sensor according to claim 7, characterized in that: The limiting unit further includes a plurality of supporting columns, and the plurality of supporting columns are fixedly connected between the diaphragm and the cantilever beam.

9. The high pressure sensor according to claim 1, characterized in that: The sensor housing also has two third movable cavities, and the third movable cavities are communicated with the second movable cavity; the fixing and disassembling unit also includes a locking component for fixing the sensor housing and the connector, and the locking component is located in the third movable cavity.

10. The high pressure sensor according to claim 9, characterized in that: The connector has a limiting groove, and the locking assembly includes a fixed block and a clamping block. The fixed block is fixedly connected to the lower side of the sliding block, and the clamping block is fixedly connected to the fixed block and inserted into the limiting groove.

Images