A proportional pressure reducing valve

Abstract

This application relates to the field of proportional valves, and in particular to a proportional pressure reducing valve, which includes an outer housing, a lower pole shoe installed inside the housing, a thimble sliding inside the lower pole shoe, a valve sleeve rotatably connected to the lower pole shoe, a valve core sliding inside the valve sleeve, and a return spring arranged on the valve core. A skeleton is installed on the outer housing. One end of the skeleton located inside the outer housing is provided with an installation groove, and a guide sleeve is formed by stamping in the installation groove. One end of the lower pole shoe extending into the outer housing is located inside the guide sleeve. An armature is also slidably arranged inside the guide sleeve, and the armature is fixedly connected to the thimble. An installation gap for installing a coil is formed between the skeleton and the outer housing. One end of the skeleton extending outside the outer housing is integrally formed with a socket, and the socket is electrically connected to the coil. By adopting the above scheme, there is no need for subsequent welding and machining processes, effectively improving the service quality of the proportional pressure reducing valve.

Description

Technical Field

[0001] The present application relates to the field of proportional valves, and more particularly to a proportional pressure reducing valve. Background Art

[0002] The proportional pressure reducing valve belongs to the high-pressure valve series and is applicable to metallurgy, petroleum, hydraulics, and hydrostatic test units. Main uses: It uses throttling energy consumption to achieve the function of pressure reduction, enabling high-pressure water in high-pressure and ultra-high-pressure equipment and high-pressure pipelines to pass through this valve and be discharged after reducing the high-pressure water to the required low-pressure, making the pressure of the high-pressure system evenly reduced.

[0003] As Figure 6 shown, there is a currently produced proportional pressure reducing valve, including an outer housing 1, a skeleton 7 arranged inside the outer housing 1, a copper coil coaxially arranged on the skeleton 7, a lower pole shoe 2 mounted on the skeleton 7, a guide sleeve 9 coaxially fixed to the end of the lower pole shoe 2, an armature 10 sliding inside the guide sleeve 9, a thimble 3 sliding inside the lower pole shoe 2. Both the armature 10 and the thimble 3 are located inside the outer housing 1. The guide sleeve 9 and the lower pole shoe 2 are fixedly installed by welding. One end of the lower pole shoe 2 extending outside the outer housing 1 is provided with a valve sleeve 4. A valve core 5 is slidably arranged inside the valve sleeve 4. A return spring 6 for resetting the valve core 5 is provided at the part where the valve core 5 contacts the lower pole shoe 2.

[0004] As Figure 6 shown, during the actual use process, an electromagnetic force is generated by energizing the copper coil, causing the armature 10 to slide along the inner cavity of the guide sleeve 9 and abut against the thimble 3 to slide inside the lower pole shoe 2, so that the thimble 3 pushes the valve core 5, thereby adjusting the gap between the valve core 5 and the valve sleeve 4 to achieve the function of pressure regulation.

[0005] Regarding the above related technology, the inventor believes that in the actual production and use process of the above proportional pressure reducing valve, since the sleeve is welded to the lower pole shoe later, the coaxiality between the sleeve and the lower pole shoe is prone to slight deviation during the welding process, resulting in the coaxiality between the two exceeding the error range. And the sliding distance of the armature is adjusted according to the magnitude of the generated electromagnetic force. The deviation caused by the welding of the sleeve is prone to quality problems of the proportional pressure reducing valve. Summary of the Invention

[0006] In order to improve the later use quality and production quality of the proportional pressure reducing valve, the present application provides a proportional pressure reducing valve.

[0007] A proportional pressure reducing valve provided by the present application adopts the following technical solutions:

[0008] A proportional pressure reducing valve includes a housing, a lower pole shoe installed inside the housing, a thimble sliding inside the lower pole shoe, a valve sleeve rotatably connected to the lower pole shoe, a valve core sliding inside the valve sleeve, and a return spring provided on the valve core. A skeleton is installed on the housing. One end of the skeleton located inside the housing is provided with an installation groove. A guide sleeve is formed by stamping in the installation groove. One end of the lower pole shoe extending into the housing is located inside the guide sleeve. An armature is also slidably arranged inside the guide sleeve. The armature is fixedly connected to the thimble. An installation gap for installing a coil is formed between the skeleton and the housing. One end of the skeleton extending outside the housing is integrally formed with a socket, and the socket is electrically connected to the coil.

[0009] By adopting the above technical solution, the guide sleeve is snap-fitted in the installation groove, and there is no need for welding and fixed connection between the lower pole shoe and the guide sleeve. On the one hand, during the manufacturing process. The guide sleeve only needs to be integrally stamped and formed for installation. Compared with the existing proportional pressure reducing valve, there is no need for subsequent welding and machining processes. At the same time, in terms of the use strength and performance of the guide sleeve, the problem of deviation from coaxiality is less likely to occur. From the manufacturing aspect, the manufacturing difficulty of the proportional pressure reducing valve is reduced, the manufacturing process is simplified, and the manufacturing efficiency is improved. From the use performance aspect, the use quality of the proportional pressure reducing valve is effectively improved, and the sliding stability of the armature is ensured.

[0010] Optionally, a plurality of spiral grooves are formed on the side wall of the armature, and the plurality of spiral grooves are arranged at equal intervals around the periphery of the armature.

[0011] By adopting the above technical solution, the spiral grooves reduce the contact area between the armature and the inner wall of the guide sleeve, reduce the frictional resistance between the armature and the guide sleeve, and make it more convenient for the armature to slide, so that the armature can quickly respond and slide after being energized.

[0012] Optionally, a circular baffle is integrally formed at one end of the housing, a connecting ear is integrally formed at the other end of the housing, a step groove is formed at one end of the skeleton extending outside the housing, and the circular baffle abuts against the side wall of the step groove.

[0013] By adopting the above technical solution, the circular baffle abuts against the side wall of the step groove, making the installation between the skeleton and the housing more stable and difficult to fall off.

[0014] Optionally, an installation hole is formed on the side wall of the housing, the installation hole communicates with the inner cavity of the lower pole shoe, a limiting tube is installed in the installation hole, a contact rod is slidably arranged in the limiting tube, a clamping structure for the thimble to slide is arranged at one end of the contact rod, and a driving structure for driving the contact rod to slide in the limiting tube is arranged at the other end of the contact rod.

[0015] By adopting the above technical solution, the limiting tube is inserted into the mounting hole. On the one hand, it makes the installation of the entire framework, the outer shell and the lower pole shoe more stable. On the other hand, through the driving structure and the clamping structure on the limiting tube, after an accidental power failure, the proportional pressure reducing valve can still be in a normal working state, leaving more time for the staff to handle emergencies.

[0016] Optionally, the clamping structure includes a plurality of first teeth integrally formed at one end of the abutting rod away from the driving structure, a plurality of second teeth integrally formed on the outer wall of the thimble, and an abutting spring coaxially arranged outside the abutting rod to drive the abutting rod to abut against the outside of the thimble. The plurality of second teeth are arranged at equal intervals along the length direction of the thimble, and the first teeth can be engaged with the second teeth.

[0017] By adopting the above technical solution, to prevent accidents, after a power failure, the abutting rod slides towards the direction close to the thimble, so that the first teeth are engaged with the second teeth, thereby realizing the limitation of the thimble and maintaining the function of adjusting the pressure even after an accidental power failure of the proportional valve.

[0018] Optionally, the driving structure includes an annular groove integrally formed on the outer wall of the limiting tube, a driving coil coaxially arranged on the annular groove, and a driving armature slidably arranged in the limiting tube. The driving armature is fixedly connected to the abutting rod, and the driving coil is electrically connected to the socket.

[0019] By adopting the above technical solution, after the socket is powered on, on the one hand, it can realize the adjustment of the sliding position of the thimble, thereby realizing the adjustment of the pressure in the valve. At the same time, power is supplied to the driving coil, so that the driving armature slides away from the thimble, and the abutting spring is in a compressed state. After a power failure, to prevent accidents and ensure the continuous proportional pressure in the valve, the restoring force of the abutting spring drives the abutting rod to abut against the outside of the thimble.

[0020] Optionally, a pulling rope is slidably arranged on the limiting tube. One end of the pulling rope is fixed on the side wall of the abutting rod, and the other end of the pulling rope is located outside the outer shell.

[0021] By adopting the above technical solution, after a power failure, when it is necessary to reset the entire proportional pressure reducing valve to the initial state, at this time, the pulling rope is pulled, so that the abutting spring is forced to be compressed, and the abutting rod is separated from the thimble, thereby facilitating the reset of the thimble.

[0022] Optionally, the edges of the outer shell are all arc-shaped.

[0023] By adopting the above technical solution, the whole outer shell is smooth, and it is difficult for the staff to scratch their hands during the installation and use process. At the same time, the aesthetics of the whole outer shell is also improved.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] Compared with the existing proportional pressure reducing valve, there is no need for welding and precision machining during the production process. At the same time, in terms of the service strength and performance of the guide sleeve, it is less likely to deviate from the coaxiality. From the manufacturing aspect, the manufacturing difficulty of the proportional pressure reducing valve is reduced, the manufacturing process is simplified, and the manufacturing efficiency is improved. From the aspect of use performance, the use quality of the proportional pressure reducing valve is effectively improved, and the sliding stability of the armature is ensured. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1.

[0027] Figure 2 It is a cross-sectional view of the overall structure of Embodiment 1.

[0028] Figure 3 It is a schematic diagram of the overall structure of the armature in Embodiment 1, mainly used to show the spiral groove.

[0029] Figure 4 It is a cross-sectional view of the overall structure of Embodiment 2.

[0030] Figure 5 It is a schematic diagram of the overall structure at the clamping structure and the driving structure part in Embodiment 2.

[0031] Figure 6 It is a cross-sectional view of the overall structure of the prior art.

[0032] Reference Signs: 1. Outer housing; 2. Lower pole shoe; 3. Thimble; 4. Valve sleeve; 5. Spool; 6. Return spring; 7. Skeleton; 8. Installation groove; 9. Guide sleeve; 10. Armature; 11. Installation pore; 12. Socket; 13. Spiral groove; 14. Annular baffle; 15. Connecting ear; 16. Step groove; 17. Installation hole; 18. Limiting tube; 19. Abutting rod; 20. First tooth; 21. Second tooth; 22. Abutting spring; 23. Ring groove; 24. Driving coil; 25. Driving armature; 26. Pulling rope. Detailed Description of the Embodiments

[0033] The following will further describe the present application in detail with reference to the attached Figures 1-5 drawings.

[0034] Embodiment 1:

[0035] The embodiment of the present application discloses a proportional pressure reducing valve.

[0036] Refer to Figure 1, A proportional pressure reducing valve, comprising a housing 1. The housing 1 is cylindrical. At one end of the housing 1, an annular baffle 14 is integrally formed. The inner diameter of the annular baffle 14 is smaller than the inner diameter of the housing 1. At the other end of the housing 1, connection lugs 15 are integrally formed. It is optimal to set the connection lugs 15 to two, and the two connection lugs 15 are symmetrically arranged around the barrel of the housing 1. In order to make it difficult for the staff to scratch their palms during the actual use or installation of the proportional pressure reducing valve, the edge of the housing 1 is set to be arc-shaped.

[0037] Refer to Figure 2 , The proportional pressure reducing valve further includes a lower pole shoe 2. The lower pole shoe 2 is fixedly installed at one end of the housing 1 away from the annular baffle 14. A thimble 3 is slidably arranged in the lower pole shoe 2. The axial direction of the thimble 3 is coaxial with the axial direction of the housing 1. At one end of the lower pole shoe 2 away from the annular baffle 14, a valve sleeve 4 is rotatably connected. The valve sleeve 4 is connected to the annular baffle 14 through a copper sleeve with a U-shaped cross-section. On the one hand, it is convenient for processing and installing the proportional valve, and on the other hand, it is convenient for the proportional valve to adapt to multiple installation environments. A valve core 5 is slidably arranged in the valve sleeve 4. The valve core 5 is fixedly connected to the thimble 3, and a return spring 6 is coaxially sleeved at the end of the valve core 5. One end of the return spring 6 is fixed on the lower pole shoe 2, and the other end is fixed on the side wall of the valve core 5.

[0038] Refer to Figure 2 , A skeleton 7 is installed on the housing 1. A part of the skeleton 7 is located inside the cavity of the housing 1, and the estimated other part is located outside the housing 1. A stepped groove 16 is formed on the side wall of the skeleton 7. The annular baffle 14 abuts against the side wall of the stepped groove 16, so that it is difficult for the skeleton 7 to separate from the housing 1, and the connection stability between the skeleton 7 and the housing 1 is improved.

[0039] Refer to Figure 2 , At one end of the skeleton 7 located inside the housing 1, an installation groove 8 is formed. A guide sleeve 9 is installed in the installation groove 8. The guide sleeve 9 is formed by stamping and stretching. The guide sleeve 9 is fixedly connected to the inner wall of the installation groove 8. One end of the lower pole shoe 2 located inside the housing 1 is inserted into the inner cavity of the guide sleeve 9. A magnetic yoke 10 is also slidably arranged in the inner cavity of the guide sleeve 9. The magnetic yoke 10 is fixedly connected to the thimble 3.

[0040] Refer to Figure 2 And Figure 3 , In order to improve the response speed of the magnetic yoke 10 after being energized and reduce the friction between the magnetic yoke 10 and the inner wall of the guide sleeve 9, two spiral grooves 13 are formed on the side wall of the magnetic yoke 10. The two spiral grooves 13 are symmetrically distributed around the circumferential edge of the magnetic yoke 10.

[0041] Refer to Figure 2, in order to drive the armature block 10 to slide within the guide sleeve 9 after being powered on, an installation gap 11 for installing the coil is formed between the skeleton 7 and the outer housing 1, and a socket 12 is integrally formed at one end of the skeleton 7 extending outside the outer housing 1. The socket 12 is electrically connected to the coil. By connecting a power source to the socket 12, the coil can be powered on to generate a magnetic field, thereby driving the armature block 10 to slide within the guide sleeve 9.

[0042] In the first embodiment of the present application, the implementation principle of a proportional pressure reducing valve is as follows: at the part where the external circuit is connected to the socket 12, after the coil is powered on, a magnetic field is generated, thereby driving the armature block 10 within the guide sleeve 9 to slide. During the sliding process of the armature block 10, the thimble 3 is driven, and the valve core 5 is moved through the linkage of the thimble 3. Thus, by adjusting the sliding position of the valve core 5, the regulation of the fluid pressure passing through the inner cavity of the valve sleeve 4 is achieved.

[0043] Embodiment Two:

[0044] Refer to Figure 4 and Figure 5 , the difference between Embodiment Two and Embodiment One lies in that: an installation hole 17 is opened on the side wall of the outer housing 1, the axial direction of the installation hole 17 is perpendicular to the axial direction of the outer housing 1, and the installation hole 17 sequentially passes through the skeleton 7 and the lower pole shoe 2, thereby communicating with the inner cavity of the lower pole shoe 2.

[0045] Refer to Figure 5 , a limiting tube 18 is installed in the installation hole 17. One end of the limiting tube 18 facing the outside is closed, and one end of the limiting tube 18 facing the thimble 3 is open. And a contact rod 19 is slidably arranged in the inner cavity of the limiting tube 18. A clamping structure for restricting the sliding of the thimble 3 is arranged at one end of the contact rod 19 facing the thimble 3.

[0046] Refer to Figure 4 and Figure 5 , the clamping structure includes a first tooth 20, a second tooth 21 and a contact spring 22. The first tooth 20 is provided with a plurality of them, and the plurality of first teeth 20 are integrally fixed on the end face of the contact rod 19. After a plurality of grooves are formed along the length direction of the thimble 3 on the side wall of the thimble 3, the second tooth 21 is formed. The number of the second teeth 21 is also set to be a plurality of them. And the plurality of second teeth 21 are arranged at equal intervals along the length direction of the thimble 3. In the initial state, under the action of the contact spring 22, the first tooth 20 meshes with the second tooth 21, so that it is difficult for the thimble 3 to slide.

[0047] Refer to Figure 4 and Figure 5, a driving structure for driving the abutting rod 19 to slide in the limiting tube 18 is provided at one end of the abutting rod 19 away from the first engaging tooth 20. The driving structure includes an annular groove 23, a driving coil 24, and a driving armature 25. The annular groove 23 is formed on the outer side of the limiting tube 18, and the driving coil 24 is coaxially embedded in the annular groove 23. The driving coil 24 is electrically connected to the socket 12 through a wire. The driving armature 25 is slidably arranged in the inner cavity of the limiting tube 18, and the driving armature 25 is fixedly connected to the abutting rod 19. In the case of power failure, one end of the abutting spring 22 is fixed on the inner wall of the limiting tube 18, and the other end of the abutting spring 22 is fixed on the side wall of the abutting rod 19. The first engaging tooth 20 is clamped between two adjacent second engaging teeth 21. After being powered on, the driving coil 24 generates a magnetic field, causing the driving armature 25 to slide in the limiting tube 18 in a direction away from the ejector pin 3. Thereby, the abutting spring 22 is forced to compress, and the first engaging tooth 20 and the second engaging tooth 21 are separated from each other, so that the ejector pin 3 can be slidably adjusted.

[0048] Refer to Figure 4 and Figure 5 , when it is necessary to reset the ejector pin 3 even after an accidental power failure, a pulling rope 26 is slidably arranged on the limiting tube 18. One end of the pulling rope 26 extends into the inner cavity of the limiting tube 18 and is fixedly connected to the abutting rod 19, and the other end of the pulling rope 26 extends out of the outer housing 1, facilitating the staff to pull.

[0049] The implementation principle of a proportional pressure reducing valve in the second embodiment of the present application is as follows: At the part where the external circuit is connected to the socket 12, after the coil is powered on, a magnetic field is generated, thereby driving the armature block 10 in the guide sleeve 9 to slide in the guide sleeve 9. During the sliding process of the armature block 10, the ejector pin 3 is driven, and the valve core 5 is driven to move through the ejector pin 3. Thus, by adjusting the sliding position of the valve core 5, the regulation of the fluid pressure passing through the inner cavity of the valve sleeve 4 is realized. When an accidental power failure occurs during the adjustment process and it is necessary to maintain the same proportional pressure regulation as before, at this time, after the driving coil 24 loses power, under the action of the abutting spring 22, the abutting rod 19 slides in the direction towards the ejector pin 3, so that the first engaging tooth 20 and the second engaging tooth 21 are engaged, making it difficult for the ejector pin 3 to slide. When it is necessary to reset the ejector pin 3, manually pulling the pulling rope 26 can achieve the reset of the ejector pin 3, improving the safety guarantee of the use of the proportional pressure reducing valve.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A proportional pressure reducing valve, comprising a housing (1), a lower pole shoe (2) installed inside the housing, a thimble (3) sliding inside the lower pole shoe (2), a valve sleeve (4) fixed on the lower pole shoe (2), a valve core (5) sliding inside the valve sleeve (4), and a return spring (6) arranged on the valve core (5), characterized in that: A skeleton (7) is installed on the outer shell (1). One end of the skeleton (7) located inside the outer shell (1) is provided with an installation groove (8). A guide sleeve (9) is formed by stamping in the installation groove (8). One end of the lower pole shoe (2) extending into the outer shell (1) is located inside the guide sleeve (9). A magnetic armature block (10) is also slidably arranged in the guide sleeve (9). The magnetic armature block (10) is fixedly connected to the ejector pin (3). An installation gap (11) for installing a coil is formed between the skeleton (7) and the outer shell (1). One end of the skeleton (7) extending outside the outer shell (1) is integrally formed with a socket (12). The socket (12) is electrically connected to the coil. An installation hole (17) is opened on the side wall of the outer shell (1). The installation hole (17) communicates with the inner cavity of the lower pole shoe (2). A limiting tube (18) is installed in the installation hole (17). A contact rod (19) is slidably arranged in the limiting tube (18). One end of the contact rod (19) is provided with a clamping structure for restricting the sliding of the ejector pin (3). The other end of the contact rod (19) is provided with a driving structure for driving the contact rod (19) to slide in the limiting tube (18). The clamping structure includes a plurality of first teeth (20) integrally formed at one end of the contact rod (19) far from the driving structure, a plurality of second teeth (21) integrally formed on the outer wall of the ejector pin (3), and a contact spring (22) coaxially arranged outside the contact rod (19) to drive the contact rod (19) to abut against the outside of the ejector pin (3). The plurality of second teeth (21) are arranged at equal intervals along the length direction of the ejector pin (3). The first teeth (20) can be engaged with the second teeth (21). The driving structure includes an annular groove (23) integrally formed on the outer wall of the limiting tube (18), a driving coil (24) coaxially arranged on the annular groove (23), and a driving magnetic armature (25) slidably arranged in the limiting tube (18). The driving magnetic armature (25) is fixedly connected to the contact rod (19). The driving coil (24) is electrically connected to the socket (12). A plurality of spiral grooves (13) are opened on the side wall of the magnetic armature block (10). The plurality of spiral grooves (13) are arranged at equal intervals around the periphery of the magnetic armature block (10). A pulling rope (26) is slidably arranged on the limiting tube (18). One end of the pulling rope (26) is fixed to the side wall of the contact rod (19). The other end of the pulling rope (26) is located outside the outer shell (1).

2. The proportional pressure reducing valve according to claim 1, characterized in that: One end of the outer shell (1) is integrally formed with an annular baffle (14). The other end of the outer shell (1) is integrally formed with a connecting ear (15). One end of the skeleton (7) extending outside the outer shell (1) forms a step groove (16). The annular baffle (14) abuts against the side wall of the step groove (16).

3. The proportional pressure reducing valve according to claim 1, characterized in that: The edges of the outer shell (1) are all arc-shaped.

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