Cooling liquid pressure sensor

Abstract

The invention belongs to the technical field of sensors, and discloses a cooling liquid pressure sensor which comprises an outer shell. When the filter assembly is used, automatic downward moving cleaning of the filter plate is achieved through hydraulic linkage of the filter assembly, the filter plate can be driven to slide along the inner wall of the filter box by pressing the protective cylinder, impurity scraping is completed in cooperation with a fixed scraper, a sensor or a pipeline does not need to be disassembled in the whole process, and the filter assembly is convenient to use. After cleaning, automatic resetting is achieved through elastic potential energy of a first spring and a second spring, the cleaning efficiency is improved, a protection barrel of the protection assembly has excellent rigidity and deformation resistance, external impact force can be directly borne and preliminarily dispersed, impact energy can be further absorbed in cooperation with elastic buffering of the first spring and buffering oil in two cylinder barrels, and the cleaning effect is improved. The protection effect is improved, and impact force is relieved.

Description

Technical Field

[0001] This invention relates to the field of sensor technology, and more particularly to a coolant pressure sensor. Background Technology

[0002] In the cooling systems of industrial equipment such as machine tools or engines, coolant pressure sensors are key components for monitoring system pressure stability and ensuring the safe operation of the equipment.

[0003] During the circulation process, coolant can easily mix with impurities such as metal shavings, scale, and wear particles from seals. If these impurities directly enter the sensor, they can not only block the pressure transmission channel, but also scratch core detection elements such as diaphragms, leading to decreased detection accuracy or even sensor failure.

[0004] To address the issue of impurities, existing sensors typically incorporate filters at the liquid inlet. These filters are often fixed structures, requiring disassembly of the sensor or cooling pipes for cleaning. This disassembly process can easily lead to coolant leakage, and frequent disassembly and reassembly can compromise the sensor's sealing performance, increasing the risk of malfunction. While some cleanable filters do not require disassembly, they necessitate additional motors, solenoid valves, and other drive components for automatic cleaning. This not only increases costs but also requires external power, making them unsuitable for industrial scenarios without power supply or with limited space. Furthermore, the sensor's wiring interfaces are susceptible to external impacts, such as bumps during equipment transport or accidental collisions with pipes. Loose wiring at the interfaces can cause signal transmission interruptions. Existing protective structures are mostly simple plastic shells that can only block dust and cannot cushion impact forces. Summary of the Invention

[0005] The present invention provides a coolant pressure sensor that can improve the cleaning efficiency of the filter plate, reduce the impact force when the sensor is subjected to external impact, and ensure that impurities do not flow to the diaphragm with the coolant when the filter plate is moved down for cleaning.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a coolant pressure sensor, the device comprising: a housing; The base is fixedly installed at the bottom of the outer casing; A protective assembly is disposed on the outer surface of the housing. The protective assembly includes two cylinders, two piston plates, two transmission rods, and two first springs. The two cylinders are symmetrically fixed on the outer surface of the housing. The two piston plates are slidably disposed on the inner walls of the cylinders. One end of each of the two first springs is fixed on one side of the two piston plates, and the other end of each of the two first springs is fixed on one side of the inner walls of the two cylinders. One end of each of the two transmission rods is fixed on one side of the two piston plates. A filter box is fixedly installed on one side of the outer casing, and the inner wall of the filter box is provided with a filter assembly for filtering cooling water.

[0007] As a further improvement of the present invention: the protective assembly further includes a protective cylinder, a cover plate, and a through hole; One end of each of the two transmission rods is fixed to the inner wall of the protective cylinder, the cover plate is threaded into the inner wall of the protective cylinder, and the through hole is opened on one side of the cover plate.

[0008] As a further improvement of the present invention: an interface seat is installed on the side of the outer shell near the protective cylinder, and the interface seat is located inside the protective cylinder.

[0009] As a further improvement of the present invention: the filter assembly includes a storage compartment, a filter plate, and a scraper; The storage compartment is fixedly disposed on the outer surface of the filter box, the filter plate is slidably disposed on the inner wall of the filter box, and the scraper is fixedly disposed on one side of the inner wall of the filter box, with one side of the scraper adhering to one side of the filter plate.

[0010] As a further improvement of the present invention: the filter assembly further includes a first guide pipe, a first diverter pipe, two sleeve rods, two connecting rods, two support plates and two second springs; Wherein, one end of the first guide pipe is fixedly disposed at the bottom of one of the cylinders, the other end of the first guide pipe is fixedly disposed on the outer surface of the first diverter pipe, both ends of the first diverter pipe are respectively fixedly disposed on one side of the two sleeve rods, one end of the two second springs is respectively fixedly disposed on one end of the two connecting rods, the other end of the two second springs is respectively fixedly disposed on the inner wall of the two sleeve rods, the two connecting rods are respectively fixedly disposed on one side of the two support plates, the opposite sides of the two support plates are respectively fixedly disposed on the opposite side of the filter plate, and the two connecting rods are slidably embedded in one side of the storage compartment.

[0011] As a further improvement of the present invention: a liquid-blocking assembly is provided on one side of the base, the liquid-blocking assembly including a sealing box, two first magnetic plates, a third spring, two slide rails and two second magnetic plates; The sealing box is fixedly installed on the side of the base away from the storage compartment. The two first magnetic plates are slidably installed on the inner wall of the sealing box. The opposite sides of the two first magnetic plates are respectively fixedly installed on the two ends of the two third springs. The two slide rails are fixedly installed on one side of the sealing box. The two second magnetic plates are slidably installed on the inner wall of the two slide rails. The two first magnetic plates are attracted to the two second magnetic plates by magnetic force.

[0012] As a further improvement of the present invention: the liquid-blocking assembly further includes two support rods, two baffles and two sealing gaskets; One end of each of the two support rods is fixedly disposed on one side of the two second magnetic plates, and the other end of each of the two support rods is fixedly disposed on one side of the two baffles. The two baffles are slidably disposed on both sides of the base, and the two baffles can move relative to each other along the sliding direction of the base. The two sealing gaskets are fixedly disposed on the contact surfaces between the two baffles and the base.

[0013] As a further improvement of the present invention: the liquid-blocking assembly further includes a second guide pipe and a second diverter pipe; One end of the second guide pipe is fixedly disposed on one side of another cylinder, the other end of the second guide pipe is fixedly disposed on the outer surface of the second diverter pipe, and both ends of the second diverter pipe are fixedly disposed on one side of the sealing box.

[0014] As a further improvement of the present invention: a mounting base is fixedly provided on the side of the base away from the outer shell, a contact cavity is opened inside the base, and a diaphragm is installed on one side of the contact cavity.

[0015] As a further improvement of the present invention: an inlet pipe is fixedly provided on one side of the filter box, and an outlet pipe is fixedly provided on the side of the base away from the filter box.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, the filter assembly achieves automatic downward cleaning of the filter plate through hydraulic linkage. By pressing the protective cylinder, the filter plate can be driven to slide along the inner wall of the filter box, and impurities are scraped off in conjunction with the fixed scraper. The entire process does not require disassembling the sensor or pipeline. After cleaning, the first spring and the second spring achieve automatic reset through elastic potential energy, thereby improving cleaning efficiency.

[0017] 2. In this invention, the protective cylinder of the protective component has excellent rigidity and deformation resistance, which can directly bear external impact force and initially disperse it. Combined with the elastic buffer of the first spring and the buffer oil inside the two cylinders, it can further absorb impact energy, improve the protective effect, and reduce the impact force.

[0018] 3. In this invention, the liquid-blocking component and the filter component achieve synchronized action through hydraulic linkage. When the protective cylinder is pressed, the second guide tube first drives the first magnetic plate and the second magnetic plate to move together, causing the baffle to close along the base, forming a sealing barrier at the bottom of the membrane. The filter plate moves down to clean, ensuring that impurities will not flow to the membrane with the coolant.

[0019] 4. In this invention, the protective component normally performs impact protection. During cleaning, it can be converted into hydraulic power by manual pressing to drive the filter component and the liquid blocking component simultaneously. No additional power components are required. This not only reduces the overall size of the sensor and lowers manufacturing costs, but also makes it compatible with the cooling systems of old equipment without power supply and outdoor industrial scenarios, significantly expanding its application scope. At the same time, the integrated design reduces the number of moving parts and lowers the maintenance frequency caused by the failure of multiple components. Attached Figure Description

[0020] Figure 1 This invention presents a schematic diagram of the overall three-dimensional structure of a coolant pressure sensor.

[0021] Figure 2 This invention provides a side-view three-dimensional structural diagram of a coolant pressure sensor.

[0022] Figure 3 This invention provides a cross-sectional three-dimensional structural diagram of the protective cylinder in a coolant pressure sensor.

[0023] Figure 4 This invention provides a schematic diagram of the internal three-dimensional structure of the base in a coolant pressure sensor.

[0024] Figure 5 This invention provides a cross-sectional three-dimensional structural diagram of the filter box and storage compartment in a coolant pressure sensor.

[0025] Figure 6 This invention provides a cross-sectional three-dimensional structural diagram of the sleeve in a coolant pressure sensor.

[0026] Figure 7 This invention provides a cross-sectional three-dimensional structural diagram of the cylinder in a coolant pressure sensor.

[0027] Figure 8 This invention presents a three-dimensional structural diagram of a sealed housing in a coolant pressure sensor.

[0028] Figure 9 This invention presents a three-dimensional structural diagram of the internal structure of a sealed housing in a coolant pressure sensor.

[0029] Figure 10 This invention proposes a coolant pressure sensor. Figure 5 Enlarged view of point A in the middle.

[0030] Legend: 1. Outer shell; 101. Interface seat; 102. Base; 103. Contact cavity; 104. Diaphragm; 105. Mounting seat; 106. Outlet pipe; 107. Filter box; 108. Inlet pipe; 2. Protective assembly; 201. Cylinder; 202. Piston plate; 203. Drive rod; 204. Protective cylinder; 205. Cover plate; 206. Through hole; 207. First spring; 3. Filter assembly; 301. Storage compartment; 302. Filter plate; 303, scraper; 304, first guide pipe; 305, first diversion pipe; 306, sleeve rod; 307, connecting rod; 308, support plate; 309, second spring; 4, liquid-blocking assembly; 401, sealing box; 402, first magnetic plate; 403, third spring; 404, slide rail; 405, second magnetic plate; 406, support rod; 407, baffle; 408, second guide pipe; 409, second diversion pipe; 410, sealing gasket. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 10 As shown, the present invention provides a coolant pressure sensor, the device comprising: a housing 1; a base 102 fixedly disposed at the bottom of the housing 1; a protective assembly 2 disposed on the outer surface of the housing 1, the protective assembly 2 comprising two cylinders 201, two piston plates 202, two transmission rods 203 and two first springs 207, wherein the two cylinders 201 are symmetrically fixedly disposed on the outer surface of the housing 1, the two piston plates 202 are respectively slidably disposed on the inner wall of the cylinders 201, one end of the two first springs 207 is respectively fixedly disposed on one side of the two piston plates 202, the other end of the two first springs 207 is respectively fixedly disposed on one side of the inner wall of the two cylinders 201, one end of the two transmission rods 203 is respectively fixedly disposed on one side of the two piston plates 202; and a filter box 107 fixedly disposed on one side of the housing 1, and the inner wall of the filter box 107 is provided with a filter assembly 3 for filtering coolant.

[0033] When the sensor is accidentally subjected to an external impact, such as an accidental collision during the maintenance of the coolant pipeline, the external force first acts on the outer wall of the protective cylinder 204 or the cover plate 205. The protective cylinder 204 is made of 304 stainless steel and has a certain rigidity, which can directly bear and initially disperse the impact force, preventing the impact force from being directly transmitted to the interface seat 101 inside the outer shell 1. When the external impact is a longitudinal impact, the longitudinal impact force will push the protective cylinder 204 downward and transmit it to the two piston plates 202 through the two transmission rods 203. At this time, the two first springs 207 will overcome the impact force and generate compression deformation, which can gradually absorb the impact energy during the compression process and cancel out the impact force. This can prevent the piston plate 202 from hard contacting the bottom of the cylinder 201 and causing deformation. The two cylinders 201 are filled with buffer oil to further reduce the impact force. Through the dispersion of force, the pin terminals of the interface seat 101 are prevented from bending.

[0034] Please see Figures 1 to 10 In one embodiment, the protective component 2 further includes a protective cylinder 204, a cover plate 205, and a through hole 206; wherein, one end of each of the two transmission rods 203 is fixedly disposed on the inner wall of the protective cylinder 204, the cover plate 205 is threadedly embedded in the inner wall of the protective cylinder 204, the through hole 206 is opened on one side of the cover plate 205, the protective cylinder 204 has a certain rigidity, can directly receive and initially disperse the impact force, and prevent the impact force from being directly transmitted to the interface seat 101 on the outer shell 1, the wire is connected to the interface seat 101 through the through hole 206 of the cover plate 205, and the cover plate 205 can be removed from the protective cylinder 204 by rotating it, at which time the wire can be installed.

[0035] Please see Figure 3 In one embodiment, an interface seat 101 is installed on the side of the outer shell 1 near the protective cylinder 204. The interface seat 101 is located inside the protective cylinder 204. The electrical signal is transmitted to the interface seat 101 through the wire and then sent to the control system through the external wire to complete the pressure detection. The interface seat 101 is located inside the protective cylinder 204 to protect the interface seat 101.

[0036] Please see Figures 1 to 10In one embodiment, the filter assembly 3 includes a storage compartment 301, a filter plate 302, and a scraper 303. The storage compartment 301 is fixedly disposed on the outer surface of the filter box 107, the filter plate 302 is slidably disposed on the inner wall of the filter box 107, and the scraper 303 is fixedly disposed on one side of the inner wall of the filter box 107, with one side of the scraper 303 adhering to one side of the filter plate 302. The filter assembly 3 also includes a first guide pipe 304, a first diverter pipe 305, two sleeve rods 306, two connecting rods 307, two support plates 308, and two second springs 309. One end of the first guide pipe 304 is fixedly disposed on one of the... At the bottom of cylinder 201, the other end of the first guide pipe 304 is fixedly set on the outer surface of the first diverter pipe 305. The two ends of the first diverter pipe 305 are respectively fixedly set on one side of the two sleeve rods 306. One end of the two second springs 309 is respectively fixedly set on one end of the two connecting rods 307. The other end of the two second springs 309 is respectively fixedly set on the inner wall of the two sleeve rods 306. The two connecting rods 307 are respectively fixedly set on one side of the two support plates 308. The opposite sides of the two support plates 308 are respectively fixedly set on the opposite side of the filter plate 302. The two connecting rods 307 are slidably embedded in one side of the storage compartment 301.

[0037] Specifically, the high-pressure buffer oil in the first guide pipe 304 is diverted through the first diverter pipe 305 and injected into the two sleeve rods 306 respectively. This pushes the two connecting rods 307 to overcome the elastic force of the two second springs 309 and extend them out of the sleeve rods 306. The two connecting rods 307 drive the two support plates 308 to move downwards. The filter plate 302 slides downwards along the inner wall of the filter box 107 with the two support plates 308 and gradually enters the collection chamber 301. During the downward movement of the filter plate 302, its surface slides relative to the scraper blade of the scraper 303. The scraper blade scrapes away the impurities intercepted on the surface of the filter plate 302. After the impurities leave the filter plate 302, they fall into the filter box 107 and flow with the coolant to the outlet pipe 106. The filter holes on the surface of the filter plate 302 have a diameter of 0.5-2mm.

[0038] Please see Figures 1 to 10In one embodiment, a liquid-blocking assembly 4 is provided on one side of the base 102. The liquid-blocking assembly 4 includes a sealing box 401, two first magnetic plates 402, a third spring 403, two slide rails 404, and two second magnetic plates 405. The sealing box 401 is fixedly disposed on the side of the base 102 away from the storage compartment 301. The two first magnetic plates 402 are slidably disposed on the inner wall of the sealing box 401. The opposite sides of the two first magnetic plates 402 are respectively fixedly disposed at both ends of the two third springs 403. The two slide rails 404 are fixedly disposed on one side of the sealing box 401. The two second magnetic plates 405 are slidably disposed on the inner wall of the two slide rails 404. The two first magnetic plates 402 are attracted to the two second magnetic plates 405 by magnetic force. The liquid-blocking assembly 4 also includes two support rods 406, two baffles 407, and... Two sealing gaskets 410; wherein, one end of each of the two support rods 406 is fixedly disposed on one side of each of the two second magnetic plates 405, and the other end of each of the two support rods 406 is fixedly disposed on one side of each of the two baffles 407, the two baffles 407 are slidably disposed on both sides of the base 102, and the two baffles 407 can move relative to each other along the sliding direction of the base 102, and the two sealing gaskets 410 are fixedly disposed on the contact surfaces of the two baffles 407 and the base 102. The liquid blocking assembly 4 also includes a second guide pipe 408 and a second diverter pipe 409; wherein, one end of the second guide pipe 408 is fixedly disposed on one side of another cylinder 201, the other end of the second guide pipe 408 is fixedly disposed on the outer surface of the second diverter pipe 409, and both ends of the second diverter pipe 409 are fixedly disposed on one side of the sealing box 401.

[0039] Specifically, the high-pressure buffer oil in the second guide pipe 408 is diverted through the second diverter pipe 409 and injected into the sealed box 401 respectively, so that the two first magnetic plates 402 move relative to each other to overcome the elastic force of the third spring 403 and move closer to the center of the sealed box 401. Since the first magnetic plate 402 and the second magnetic plate 405 are attracted by opposite poles, the second magnetic plate 405 moves relative to the first magnetic plate 402 synchronously. Through the support rod 406, the two baffles 407 are driven to close along the base 102 towards the center of the contact cavity 103, blocking the bottom of the diaphragm 104. At this time, the scraped impurities are carried by the coolant to the outlet pipe 106. The two sealing gaskets 410 seal the contact points between the two baffles 407 and the base 102.

[0040] Please see Figures 1 to 10 In one embodiment, a mounting base 105 is fixedly provided on the side of the base 102 away from the outer shell 1. A contact cavity 103 is opened inside the base 102. A diaphragm 104 is installed on one side of the contact cavity 103. The coolant directly immerses the diaphragm 104. The diaphragm 104 undergoes micro-deformation under the pressure of the coolant. The micro-deformation of the diaphragm 104 is converted into an electrical signal by a pressure sensing element in the contact cavity 103.

[0041] Please see Figures 1 to 10 In one embodiment, an inlet pipe 108 is fixedly provided on one side of the filter box 107, and an outlet pipe 106 is fixedly provided on the side of the base 102 away from the filter box 107. External coolant enters the filter box 107 through the inlet pipe 108, and the coolant that has completed pressure transmission flows from the contact cavity 103 to the outlet pipe 106 on the other side of the outer casing 1.

[0042] The working principle and usage process of this invention: Under normal pressure testing and without cleaning requirements, the two protective cylinders 204 in the protective assembly 2 are not subjected to external force, and the two first springs 207 are in a naturally extended state, pushing the two piston plates 202 to a position near the top of the two cylinders 201. The two transmission rods 203 extend with the piston plates 202. The protective cylinders 204 cover the top interface seat 101 of the outer shell 1. The wires are connected to the interface seat 101 through the through hole 206 of the cover plate 205 to achieve signal transmission protection. There is no hydraulic oil pushing the cylinder 201 inside the filter assembly 3, and the second spring 309 is self-extensioned. Then, the connecting rod 307 is pulled and retracted into the sleeve rod 306. The filter plate 302 is attached to the inner wall of the filter box 107 and located in the middle of the filter box 107. The scraper 303 is in close contact with the surface of the filter plate 302. The third spring 403 in the liquid blocking assembly 4 extends naturally, pushing the two first magnetic plates 402 to separate along the two slide rails 404 to both sides of the sealing box 401. The two second magnetic plates 405 separate synchronously with the two first magnetic plates 402. Through the two support rods 406, the two baffles 407 are driven to open to both sides along the sliding groove of the base 102. The diaphragm 104 is completely exposed in the contact cavity 103. During testing, external coolant enters the filter box 107 through the inlet pipe 108 and flows through the filter holes on the surface of the filter plate 302. Impurities such as metal particles and scale are intercepted on the side of the filter plate 302 facing the inlet pipe 108. The filtered clean coolant enters the rear channel of the filter box 107 and flows into the contact cavity 103 through the connection channel between the outer shell 1 and the filter box 107. Because the baffle 407 is open, the coolant directly soaks the diaphragm 104. The diaphragm 104 undergoes a slight deformation under the pressure of the coolant. The slight deformation of the diaphragm 104 is converted into an electrical signal by the pressure sensing element in the contact cavity 103. The electrical signal is transmitted to the interface seat 101 through the wire and then to the control system through the external wire to complete the pressure detection. The coolant that has completed the pressure transmission flows from the contact cavity 103 to the outlet pipe 106 on the other side of the outer shell 1. If the sensor is accidentally impacted by an external force, such as during the repair of a coolant pipe, the external force will first act on the outer wall of the protective cylinder 204 or the cover plate 205. The protective cylinder 204 has a certain rigidity and can directly bear and initially disperse the impact force, preventing the impact force from being directly transmitted to the interface seat 101 on the outer shell 1. When the external impact is a longitudinal impact, the longitudinal impact force will push the protective cylinder 204 downward and transmit it to the two piston plates 202 through the two transmission rods 203. At this time, the two first springs 207 will overcome the impact force and generate compression deformation, which can gradually absorb the impact energy during the compression process and cancel out the impact force. This can prevent the piston plate 202 from hard contacting the bottom of the cylinder 201 and causing deformation. The two cylinders 201 are filled with buffer oil to further reduce the impact force. Through the dispersion of force, the pin terminals of the interface seat 101 are prevented from bending, which would affect the detection. When the filter plate 302 intercepts too many impurities, the pressure in the liquid inlet channel increases, requiring manual pressing of the protective cylinder 204 to trigger cleaning. At this time, the protective component 2 acts as a power source, synchronously driving the filter component 3 to scrape off impurities and the liquid blocking component 4 to isolate the membrane 104. The operator presses the cover plate 205 on the top of the protective cylinder 204, and the protective cylinder 204 moves downward against the elastic force of the first spring 207. Through the two transmission rods 203, it pushes the two piston plates 202 to slide downward along the inner wall of the two cylinders 201, compressing the buffer oil at the bottom of the cylinder 201. The compressed buffer oil generates high pressure and flows into the first guide pipe 304 and the second guide pipe 408 respectively through the bottom of the two cylinders 201, realizing the synchronous power transmission of one driving filter component 3 and one driving liquid blocking component 4. The high-pressure buffer oil in the first guide pipe 304 is diverted through the first diverter pipe 305 and injected into the two sleeve rods 306 respectively. This pushes the two connecting rods 307 to overcome the elastic force of the two second springs 309 and extend them out of the sleeve rods 306. The two connecting rods 307 drive the two support plates 308 to move downward. The filter plate 302 slides downward along the inner wall of the filter box 107 with the two support plates 308 and gradually enters the collection chamber 301. During the downward movement of the filter plate 302, its surface slides relative to the scraper blade of the scraper 303. The scraper blade scrapes away the impurities intercepted on the surface of the filter plate 302. After the impurities leave the filter plate 302, they fall into the filter box 107 and are discharged with the coolant to the outlet pipe 106. The high-pressure buffer oil in the second guide pipe 408 is diverted through the second diverter pipe 409 and injected into the sealed box 401 respectively. This causes the two first magnetic plates 402 to move relative to each other, overcoming the elastic force of the third spring 403, and move closer to the center of the sealed box 401. Since the opposite poles of the first magnetic plate 402 and the second magnetic plate 405 attract each other, the second magnetic plate 405 moves relative to the first magnetic plate 402 synchronously. Through the support rod 406, the two baffles 407 are driven to close along the base 102 towards the center of the contact cavity 103, blocking the bottom of the diaphragm 104. At this time, the scraped impurities are carried by the coolant to the outlet pipe 106 and will not contact the diaphragm 104. After the process is completed, the protective sleeve 204 is released, the first spring 207 releases its elastic potential energy, pushing the piston plate 202 to return to its original position along the cylinder 201. The transmission rod 203 drives the protective sleeve 204 to rise back to its initial position, covering the interface seat 101. The piston plate 202 moves upward, creating a negative pressure at the bottom of the cylinder 201. The high-pressure buffer oil in the first guide pipe 304 and the second guide pipe 408 flows back to the cylinder 201. The filter assembly 3 and the liquid-blocking assembly 4 lose their hydraulic thrust. The second spring 309 contracts, pulling the connecting rod 307 back into the sleeve rod 306. The filter plate 302 moves upward with the support plate 308 to the middle of the liquid inlet channel of the filter box 107, restoring the filtration function. The third spring 403 extends, pushing the first magnetic plate 402 to separate. The second magnetic plate 405 drives the baffle 407 to open along the base 102, exposing the diaphragm 104 again. The sensor returns to its normal pressure detection state.

[0043] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coolant pressure sensor, characterized in that, The device includes: an outer casing (1); The base (102) is fixedly disposed at the bottom of the outer shell (1); A protective assembly (2) is disposed on the outer surface of the outer shell (1). The protective assembly (2) includes two cylinders (201), two piston plates (202), two transmission rods (203), and two first springs (207). The two cylinders (201) are symmetrically fixed on the outer surface of the outer shell (1). The two piston plates (202) are slidably disposed on the inner wall of the cylinders (201). One end of each of the two first springs (207) is fixed on one side of the two piston plates (202), and the other end of each of the two first springs (207) is fixed on one side of the inner wall of the two cylinders (201). One end of each of the two transmission rods (203) is fixed on one side of the two piston plates (202). A filter box (107) is fixedly installed on one side of the outer shell (1), and the inner wall of the filter box (107) is provided with a filter assembly (3) for filtering cooling water.

2. The coolant pressure sensor according to claim 1, characterized in that: The protective component (2) also includes a protective cylinder (204), a cover plate (205), and a through hole (206); One end of each of the two transmission rods (203) is fixed to the inner wall of the protective cylinder (204), the cover plate (205) is threaded into the inner wall of the protective cylinder (204), and the through hole (206) is opened on one side of the cover plate (205).

3. The coolant pressure sensor according to claim 2, characterized in that: An interface seat (101) is installed on the side of the outer shell (1) near the protective cylinder (204), and the interface seat (101) is located inside the protective cylinder (204).

4. The coolant pressure sensor according to claim 3, characterized in that: The filter assembly (3) includes a storage compartment (301), a filter plate (302), and a scraper (303); The storage compartment (301) is fixedly disposed on the outer surface of the filter box (107), the filter plate (302) is slidably disposed on the inner wall of the filter box (107), the scraper (303) is fixedly disposed on one side of the inner wall of the filter box (107), and one side of the scraper (303) is attached to one side of the filter plate (302).

5. The coolant pressure sensor according to claim 4, characterized in that: The filter assembly (3) also includes a first guide pipe (304), a first diverter pipe (305), two sleeve rods (306), two connecting rods (307), two support plates (308), and two second springs (309). One end of the first guide pipe (304) is fixedly disposed at the bottom of one of the cylinders (201), and the other end of the first guide pipe (304) is fixedly disposed on the outer surface of the first diverter pipe (305). The two ends of the first diverter pipe (305) are respectively fixedly disposed on one side of the two sleeve rods (306). One end of the two second springs (309) is respectively fixedly disposed on one end of the two connecting rods (307). The other end of the two second springs (309) is respectively fixedly disposed on the inner wall of the two sleeve rods (306). The two connecting rods (307) are respectively fixedly disposed on one side of the two support plates (308). The opposite sides of the two support plates (308) are respectively fixedly disposed on the opposite side of the filter plate (302). The two connecting rods (307) are slidably embedded in one side of the storage compartment (301).

6. The coolant pressure sensor according to claim 4, characterized in that: A liquid-blocking assembly (4) is provided on one side of the base (102). The liquid-blocking assembly (4) includes a sealing box (401), two first magnetic plates (402), a third spring (403), two slide rails (404), and two second magnetic plates (405). The sealing box (401) is fixedly disposed on the side of the base (102) away from the storage compartment (301). The two first magnetic plates (402) are slidably disposed on the inner wall of the sealing box (401). The opposite sides of the two first magnetic plates (402) are respectively fixedly disposed on the two ends of the two third springs (403). The two slide rails (404) are fixedly disposed on one side of the sealing box (401). The two second magnetic plates (405) are slidably disposed on the inner wall of the two slide rails (404). The two first magnetic plates (402) are attracted to the two second magnetic plates (405) by magnetic force.

7. The coolant pressure sensor according to claim 6, characterized in that: The liquid-blocking assembly (4) also includes two support rods (406), two baffles (407) and two sealing gaskets (410). One end of each of the two support rods (406) is fixedly disposed on one side of the two second magnetic plates (405), and the other end of each of the two support rods (406) is fixedly disposed on one side of the two baffles (407). The two baffles (407) are slidably disposed on both sides of the base (102), and the two baffles (407) can move relative to each other along the sliding direction of the base (102). The two sealing gaskets (410) are fixedly disposed on the contact surfaces of the two baffles (407) and the base (102).

8. The coolant pressure sensor according to claim 7, characterized in that: The liquid-blocking assembly (4) also includes a second guide pipe (408) and a second diverter pipe (409). One end of the second guide pipe (408) is fixedly disposed on one side of another cylinder (201), the other end of the second guide pipe (408) is fixedly disposed on the outer surface of the second diverter pipe (409), and both ends of the second diverter pipe (409) are fixedly disposed on one side of the sealing box (401).

9. The coolant pressure sensor according to claim 1, characterized in that: The base (102) has a mounting base (105) fixedly installed on the side away from the outer shell (1). The base (102) has a contact cavity (103) inside, and a diaphragm (104) is installed on one side of the contact cavity (103).

10. The coolant pressure sensor according to claim 1, characterized in that: An inlet pipe (108) is fixedly installed on one side of the filter box (107), and an outlet pipe (106) is fixedly installed on the side of the base (102) away from the filter box (107).

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