Flow electromagnetic proportional valve

Abstract

The utility model discloses a flow electromagnetic proportional valve, which comprises a liquid passing pipe, a valve body, a valve core, a valve rod and a valve core, and is characterized in that the liquid passing pipe is provided with a liquid inlet and a liquid outlet; the valve body assembly is matched with the liquid passing pipe; the coil assembly is matched with the valve body assembly; the filtering assembly is arranged on the liquid passing pipe; the backflow prevention assembly is matched with the liquid passing pipe; the installation sleeve is obliquely arranged on the liquid passing pipe, the fixing bolt is in threaded connection with the inner wall of the installation sleeve, the elastic piece is arranged on the fixing bolt, the sealing block is arranged at the end of the elastic piece, the sealing protrusion is arranged on the inner wall of the liquid passing pipe, a first installation hole is formed in the fixing bolt, and a second installation hole is formed in the sealing block. The sealing block can slide relative to the inner wall of the first mounting hole, a limiting groove is formed in the sealing protrusion, and the end of the sealing block can be attached to the limiting groove.

Description

TECHNICAL FIELD

[0001] The utility model belongs to proportional valve technical field, especially is involved in a flow electromagnetic proportional valve. BACKGROUND

[0002] Proportional valve is a new type of hydraulic control device. In the ordinary pressure valve, flow valve and directional valve, the original control part is replaced by proportional electromagnet, and the pressure, flow or direction of oil flow is continuously and proportionally controlled remotely according to the input electrical signal. The existing proportional valve is generally composed of a coil, a fixed iron core, a compression spring, a moving iron core and a valve body. The working principle is that when the coil is not powered, the sealing head of the fixed iron core is under the back pressure of the compression spring and the medium of the valve inlet, so that the valve is closed. When the coil is powered, the electromagnetic force of the end surface of the fixed iron core overcomes the back pressure of the compression spring and the medium of the valve inlet, so that the moving iron core moves towards the fixed iron core until the end surface of the moving iron core is attracted to the end surface of the fixed iron core, at which time the valve is in an open state.

[0003] Patent CN202311454067.8 discloses a flow electromagnetic proportional valve, which comprises a valve body configured to have a valve cavity structure for guiding fluid, a valve core for closing the valve cavity, an electromagnet for driving the valve core to move, a mounting block provided on the valve body, a power line for providing power to the coil, a winding roller provided on the mounting block, a torsional spring provided on the winding roller, and a power line wound on the winding roller, and the mounting block is provided with a cavity for storing the power line.

[0004] In the above-mentioned patent, the liquid may backflow and impact the valve nozzle. Utility model content

[0005] The content part of the present application is used to introduce the concept in a simple form, which will be described in detail in the specific embodiment part. The content part of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0006] In order to solve the technical problems mentioned in the background part, some embodiments of the present application provide a flow electromagnetic proportional valve, which comprises:

[0007] A liquid passage pipe is provided with a liquid inlet and a liquid outlet;

[0008] A valve body assembly cooperates with the liquid passage pipe;

[0009] A coil assembly cooperates with the valve body assembly;

[0010] A filter assembly is provided on the liquid passage pipe;

[0011] A backflow prevention assembly cooperates with the liquid passage pipe;

[0012] The backflow prevention assembly comprises a mounting sleeve obliquely arranged on the liquid passage pipe, a fixing bolt screwed on the inner wall of the mounting sleeve, an elastic member arranged on the fixing bolt, a sealing block arranged on the end of the elastic member, and a sealing protrusion arranged on the inner wall of the liquid passage pipe.

[0013] Preferably, the end of the sealing block is detachably provided with an elastic sealing plate, and the elastic sealing plate is attached to the limiting slot.

[0014] Preferably, the end of the sealing block is provided with a screw rod, the screw rod is screwed with a nut, and the elastic sealing plate is provided with a hole through which the screw rod passes.

[0015] Preferably, the side wall of the sealing block is provided with a flow guide hole, and the flow guide hole is communicated with the second mounting hole.

[0016] Preferably, the filter assembly comprises a fixing sleeve obliquely arranged on the outer wall of the liquid passage pipe, a first bolt screwed in the fixing sleeve, a filter cylinder detachably arranged on the first bolt, and a limiting protrusion arranged on the inner wall of the liquid passage pipe, the limiting protrusion is provided with a clamping groove matched with the filter cylinder, the end of the filter cylinder is attached to the clamping groove, the liquid passage pipe is provided with an inlet communicated with the fixing sleeve, and the filter cylinder is uniformly provided with a plurality of filter holes.

[0017] Preferably, the valve body assembly comprises a valve body arranged on the liquid passage pipe, a valve cover arranged on the valve body, a valve nozzle component arranged in the valve body, a static core component arranged on the valve cover, a moving core component matched with the static core component, a pressure regulating spring sleeved outside the moving core component, and a closing spring.

[0018] Preferably, the outer wall of the liquid passage pipe is provided with a mounting plate, and the mounting plate is provided with a mounting hole.

[0019] Preferably, the fixing bolt is provided with a positioning plate, and the positioning plate is attached to the end of the mounting sleeve.

[0020] The application provides a backflow prevention flow electromagnetic proportional valve. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, make the other features, purposes and advantages of the present application more apparent. The illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation of the present application.

[0022] In addition, throughout the drawings, the same or similar reference signs represent the same or similar elements. It should be understood that the drawings are schematic, and the elements and elements are not necessarily drawn according to the scale.

[0023] In the drawings:

[0024] Figure 1 It is a structure schematic view of the utility model.

[0025] Figure 2 It is a sectional view of the utility model.

[0026] Figure 3 It is Figure 2 The enlarged view of A of figure

[0027] Figure 4 It is Figure 2 The enlarged view of B of figure

[0028] Figure 5 It is a internal structure schematic view of the utility model.

[0029] Fig. 1, liquid pipe; 2, valve body assembly; 3, coil assembly; 4, filter assembly; 41, fixed sleeve; 411, sealing groove; 42, first bolt; 43, filter cartridge; 44, limiting protrusion; 441, clamping groove; 421, mounting groove; 422, recess; 423, elastic sealing ring; 45, elastic ring plate; 451, plug-in groove; 21, valve body; 22, valve cover; 23, valve nozzle component; 24, static iron core component; 25, dynamic iron core component; 26, pressure regulating spring; 27, closing spring; 231, fixed seat; 232, first pipe body; 234, second pipe body; 235, sealing plate; 236, elastic plate; 46, filter screen; 5, temperature sensor; 6, mounting plate; 61, mounting hole; 71, mounting sleeve; 711, first mounting hole; 72, fixed bolt; 712, second mounting hole; 73, elastic member; 74, sealing block; 75, sealing protrusion; 751, limiting groove; 76, elastic sealing plate; 77, screw rod; 78, nut; 741, flow guide hole. DETAILED DESCRIPTION

[0030] Embodiments of the present disclosure will be described in more detail with reference to the drawings. Although certain embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be interpreted as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood. It should be understood that the drawings and embodiments of the present disclosure are for exemplary purposes only and are not intended to limit the scope of protection of the present disclosure.

[0031] In addition, it should be further noted that, for the convenience of description, only the parts related to the invention are shown in the drawings. The embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the "first", "second", and the like concepts mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0033] It should be noted that the "one", "multiple" modification mentioned in the present disclosure is illustrative but not restrictive, and those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as "one or more".

[0034] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] As shown in the drawings, Figures 1-5 A flow electromagnetic proportional valve, comprising a through liquid pipe 1, a valve body assembly 2, a coil assembly 3, a filter assembly 4 and an anti-backflow assembly 7, the through liquid pipe 1 is provided with a liquid inlet at one end and a liquid outlet at the other end; the valve body assembly 2 is arranged on the through liquid pipe 1 and is used to control the flow of liquid in the through liquid pipe 1; the coil assembly 3 is arranged on the valve body assembly 2 and is used to drive the valve body assembly 2; the filter assembly 4 is used to filter impurities in the liquid.

[0036] Specifically, the filter assembly 4 comprises a fixed sleeve 41, a first bolt 42, a filter cylinder 43 and a limiting protrusion 44, the fixed sleeve 41 is obliquely fixed on the outer wall of the through liquid pipe 1, and the through liquid pipe 1 is provided with an inlet communicating with the fixed sleeve 41; the first bolt 42 is screwed in the fixed sleeve 41; the filter cylinder 43 is uniformly provided with filter holes, and is detachably connected with the first bolt 42; the limiting protrusion 44 is fixed on the inner wall of the through liquid pipe 1, and the limiting protrusion 44 is provided with a clamping groove 441 matched with the filter cylinder 43, and the end of the filter cylinder 43 can be attached to the clamping groove 441, so that the liquid entering from the liquid inlet will flow to the filter cylinder 43, and after being filtered by the filter cylinder 43, the liquid will flow out from the filter holes, thereby completing the filtration of the impurities in the liquid, and the impurities will be concentrated in the filter cylinder 43, facilitating subsequent treatment, and when it is necessary to replace and clean the filter cylinder 43, the filter cylinder 43 can be taken out by rotating the first bolt 42; the filter assembly 4 is obliquely fixed on the outer wall of the through liquid pipe 1 through the fixed sleeve 41, the first bolt 42 is screwed in the fixed sleeve 41, and the filter cylinder 43 is detachably connected with the first bolt 42 and is attached to the clamping groove 441 of the limiting protrusion 44 on the inner wall of the through liquid pipe 1. The liquid enters the filter cylinder 43 from the inlet, is filtered through the uniformly distributed filter holes, and the impurities are stored in the filter cylinder 43. When replacement is needed, the filter cylinder 43 can be taken out by rotating the first bolt 42. The filter cylinder 43 and the through liquid pipe 1 are limited by the clamping groove 441, combined with the obliquely installed fixed sleeve 41, which significantly simplifies the disassembly process of the filter assembly 4, facilitates maintenance and replacement, and at the same time ensures stable filtration effect.

[0037] As a preferred solution, the first bolt 42 is provided with an installation groove 421 at the end thereof, and the filter cartridge 43 is provided with an elastic ring plate 45, which is provided with an insertion groove 451 matched with the filter cartridge 43, and the elastic ring plate 45 is attached to the inner wall of the installation groove 421.

[0038] Specifically, the valve body assembly 2 comprises a valve body 21, a valve cover 22, a valve nozzle component 23, a static iron core component 24, a dynamic iron core component 25, a pressure regulating spring 26 and a closing spring 27, the valve body 21 is fixed on the liquid passage pipe 1, the valve nozzle component 23 is arranged in the valve body 21 and comprises a fixed seat 231 arranged on the valve body 21, a first pipe body 232 connected with the fixed seat 231, a second pipe body 234 arranged on the inner wall of the liquid passage pipe 1, a sealing plate 235 matched with the first pipe body 232 and an elastic plate 236 connected with the sealing plate 235, the first pipe body 232 and the second pipe body 234 abut at the ends thereof, the second pipe body 234 is provided with a liquid outlet on the side wall thereof, the static iron core component 24 is arranged on the valve cover 22, the valve cover 22 is arranged on the valve body 21, the dynamic iron core component 25 is arranged in the coil assembly 3 and matched with the static iron core component 24, and the end of the dynamic iron core is in contact with the sealing plate 235, the pressure regulating spring 26 and the closing spring 27 are both sleeved on the dynamic iron core component 25, one end of the pressure regulating spring 26 is arranged on the valve cover 22, the other end is arranged on the valve nozzle component 23, one end of the closing spring is arranged on the static iron core component 24, and the other end is arranged on the dynamic iron core component 25.

[0039] Specifically, the anti-backflow assembly 7 comprises a mounting sleeve 71, a fixing bolt 72, an elastic member 73, a sealing block 74 and a sealing protrusion 75, the mounting sleeve 71 is fixedly arranged on the outer wall of the liquid passage pipe in an inclined manner, the fixing bolt 72 is screwed on the inner wall of the mounting sleeve and is provided with a first installation hole 711, the elastic member 73 is a spring, one end of which is arranged in the first installation hole, the sealing block 74 is provided with a second installation hole 712, one end of the elastic member is connected in the second installation hole, and the sealing block can slide relative to the inner wall of the first installation hole, the sealing protrusion 75 is fixed on the inner wall of the liquid passage pipe and is provided with a limiting groove 751, the end of the sealing block can be attached to the limiting groove, and the anti-backflow assembly realizes the anti-backflow function through the cooperation of the inclined mounting sleeve, the fixing bolt, the elastic member, the sealing block and the sealing protrusion. When the liquid flows in the forward direction, the sealing block compresses the elastic member under the fluid pressure, slides into the first installation hole, and makes the end of the sealing block separate from the limiting groove, so that the liquid can flow smoothly; when the liquid flows in the reverse direction, the elastic member pushes the sealing block to reset, and the end thereof is tightly attached to the limiting groove of the sealing protrusion, thereby blocking the backflow path. This structure realizes the double mechanisms of mechanical self-locking and elastic resetting, effectively prevents the backflow of the liquid, reduces the impact on the valve nozzle, and facilitates installation and maintenance due to the inclined design.

[0040] As a preferred solution, the end of the sealing block 74 is detachably provided with an elastic sealing plate 76, which is attached to the limiting groove. The end of the sealing block is additionally provided with a detachable elastic sealing plate, which further optimizes the sealing performance. The elastic sealing plate is made of flexible material, which can adapt to the slight deformation of the limiting groove and ensure complete adhesion of the sealing surface. When the sealing plate wears out, it can be individually replaced without replacing the entire sealing block, significantly reducing maintenance costs and prolonging the service life of the assembly; the end of the sealing block is provided with a screw rod 77, and the screw rod is screwed with a nut 78. The elastic sealing plate is provided with a hole for the screw rod to pass through.

[0041] In other embodiments, the side wall of the sealing block 74 is provided with a flow guide hole 741, which communicates with the second mounting hole. The flow guide hole can guide part of the liquid into the second mounting hole and the first mounting hole to assist in pushing the sealing block to adhere to the limiting groove.

[0042] In other embodiments, a filter screen 46 is provided on the inner wall of the filter cartridge 43. The filter screen 46 is added to the inner wall of the filter cartridge 43 to form a double-layer filtering structure in cooperation with the filter hole. The filter screen 46 can intercept finer impurities to improve filtering precision; the double-layer structure disperses the filtering load, reduces the risk of clogging of a single filtering layer, and prolongs the cleaning cycle.

[0043] In other embodiments, a temperature sensor 5 is provided on the first bolt 42, with one end extending into the liquid passage pipe 1. The temperature sensor 5 is integrated on the first bolt 42, with its probe extending into the liquid passage pipe 1 to monitor the liquid temperature in real time; the temperature data can be fed back to the control system to achieve overheat protection or flow dynamic adjustment, avoiding damage to the valve body assembly 2 due to abnormal temperature, and improving system safety and intelligent level.

[0044] In other embodiments, a recess 422 is formed in the outer wall of the first bolt 42, and an elastic sealing ring 423 is arranged in the recess 422. The fixed sleeve 41 is provided with a sealing groove 411 matched with the elastic sealing ring 423.

[0045] In other embodiments, the first bolt 42 is provided with a limiting plate at the end, which can abut against the end of the fixed sleeve 41 to prevent the filter cartridge 43 from being misaligned with the limiting protrusion 44 and the clamping groove 441 due to excessive rotation, ensuring installation accuracy and reducing the risk of operation errors.

[0046] In other embodiments, the outer wall of the liquid passage pipe 1 is provided with a mounting plate 6, and the mounting plate 6 is provided with a mounting hole 61. The proportional valve can be quickly fixed to the equipment or pipeline support through the mounting hole 61, improving the installation convenience and enhancing the overall structural stability.

[0047] The above description is merely exemplary of some of the many possible embodiments of the present disclosure and of the principles thereof. It is to be understood that those skilled in the art will be able to devise various embodiments of the present disclosure without departing from the scope of the present disclosure as disclosed in the above description and attached claims, and that the scope of the present disclosure is not limited to the specific technical features described above. For example, the technical features described above can be replaced with other technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) to form other technical solutions.

Claims

1. A flow electromagnetic proportional valve, comprising: a through-flow pipe provided with an inlet and an outlet; a valve body assembly cooperating with the through-flow pipe; a coil assembly cooperating with the valve body assembly; a filter assembly provided on the through-flow pipe; an anti-backflow assembly cooperating with the through-flow pipe; characterized in that the anti-backflow assembly comprises a mounting sleeve obliquely provided on the through-flow pipe, a fixing bolt screwed on the inner wall of the mounting sleeve, an elastic member provided on the fixing bolt, a sealing block provided on the end of the elastic member, and a sealing protrusion provided on the inner wall of the through-flow pipe, the fixing bolt is provided with a first mounting hole, the sealing block is provided with a second mounting hole, the sealing block can slide relative to the inner wall of the first mounting hole, the sealing protrusion is provided with a limiting groove, and the end of the sealing block can be attached to the limiting groove.

2. The flow electromagnetic proportional valve according to claim 1, characterized in that: The end of the sealing block is detachably provided with an elastic sealing plate, and the elastic sealing plate is attached to the limiting groove.

3. The flow electromagnetic proportional valve according to claim 2, characterized in that: The end of the sealing block is provided with a screw rod, the screw rod is screwed with a nut, and the elastic sealing plate is provided with a hole through which the screw rod passes.

4. The flow electromagnetic proportional valve according to claim 1, characterized in that: The side wall of the sealing block is provided with a flow guide hole, and the flow guide hole is communicated with the second mounting hole.

5. The flow electromagnetic proportional valve according to claim 1, characterized in that: The filter assembly comprises a fixing sleeve obliquely provided on the outer wall of the through-flow pipe, a first bolt screwed in the fixing sleeve, a filter cartridge detachably provided on the first bolt, and a limiting protrusion provided on the inner wall of the through-flow pipe, the limiting protrusion is provided with a clamping groove cooperating with the filter cartridge, the end of the filter cartridge can be attached to the clamping groove, the through-flow pipe is provided with an inlet communicated with the fixing sleeve, and the filter cartridge is uniformly provided with a plurality of filter holes.

6. The flow electromagnetic proportional valve according to claim 1, characterized in that: The valve body assembly comprises a valve body provided on the through-flow pipe, a valve cover provided on the valve body, a valve nozzle component provided in the valve body, a static iron core component provided on the valve cover, a moving iron core component cooperating with the static iron core component, a pressure regulating spring sleeved outside the moving iron core component, and a closing spring.

7. The flow electromagnetic proportional valve according to claim 1, characterized in that: The outer wall of the through-flow pipe is provided with a mounting plate, and the mounting plate is provided with a mounting hole.

8. The flow electromagnetic proportional valve according to claim 1, characterized in that: The fixing bolt is provided with a positioning plate, and the positioning plate is attached to the end of the mounting sleeve.

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