A pilot proportional pressure reducing valve without interference press fitting

Abstract

The utility model relates to the technical field of pilot proportional pressure reducing valve discloses a pilot proportional pressure reducing valve of exempting from interference pressure equipment, including casing and jackscrew, the casing includes plug assembly, plug seal washer and plug baffle ring, plug assembly is located one end of casing, plug seal washer is located the outside of plug assembly one end, plug baffle ring is located one end in the inside of casing. The utility model discloses by will be special-shaped elastic rubber ring, pressure block and E -shaped snap spring install in the tail end of jackscrew, thereby can fix the front choke iron, rear choke iron and the coil skeleton of having the enameled wire, more important is the adjustment for clearance fit, it does not need to realize the fixation through the interference pressure equipment mode, can avoid the product deformation caused by the poor interference pressure equipment performance of stainless steel material, brings the convenience to the performance debugging and maintenance of product, when needing to do the adjustment, only needs to disassemble E -shaped snap spring to realize the maintenance of product, makes the use effect of pilot proportional pressure reducing valve better.

Description

Technical Field

[0001] This utility model relates to the technical field of pilot-operated proportional pressure reducing valves, specifically a pilot-operated proportional pressure reducing valve that does not require interference fit. Background Technology

[0002] Pilot-operated pressure reducing valves regulate the flow of the medium by controlling the opening degree of the opening and closing elements within the valve body, thereby reducing the pressure of the medium. At the same time, they adjust the opening degree of the opening and closing elements by using the downstream pressure to keep the downstream pressure within a certain range. Even when the inlet pressure changes continuously, the outlet pressure is kept within the set range, protecting downstream household and production equipment.

[0003] Due to the functional requirements of the product, the solenoid valve clamping block and push rod are both made of stainless steel and the two parts are fixed by interference fit process. Stainless steel has poor interference fit performance. During the pressing process, there are problems such as the same material surfaces interlocking, large pressing force causing deformation of parts, and the inability to guarantee the overall form and position tolerance of pressed parts. Summary of the Invention

[0004] The purpose of this invention is to provide a pilot proportional pressure reducing valve that does not require interference fit, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pilot proportional pressure reducing valve without interference fit, comprising a housing and a push rod. The housing includes a plug assembly, a plug sealing gasket, and a plug retaining ring. The plug assembly is located at one end of the housing, the plug sealing gasket is located on the outer side of one end of the plug assembly, and the plug retaining ring is located at one end inside the housing. The push rod includes a front chuck, a coil frame, a rear chuck, a shaped elastic rubber ring, a clamping block, and an E-shaped retaining ring. The front chuck is located at one end outside the push rod, the coil frame is located at the other end outside the push rod, the rear chuck is located at one end inside the coil frame, the shaped elastic rubber ring is located on the outer side of one end of the push rod, the clamping block is located on the outer side of the push rod near the shaped elastic rubber ring, and the E-shaped retaining ring is located on the outer side of the push rod near the clamping block.

[0006] Preferably, the outer side of the coil frame near the front chuck is provided with enameled wire, a spring is provided between the plug retaining ring and the coil frame, and a buffer aluminum pad is provided on the outer side of the top rod away from the irregular elastic rubber ring.

[0007] Preferably, a pilot valve stem is provided at the end of the push rod away from the plug assembly, a pilot valve seat is provided at the end of the pilot valve stem away from the push rod, a filter screen one is provided at the end of the outer side of the housing near the pilot valve seat, a filter screen two is provided at the end of the housing away from the inside of the plug assembly, and a filter screen fixing seat is provided inside the housing at the position of filter screen two.

[0008] Preferably, the inner wall of the housing is provided with internal threads, the outer side of the plug assembly is provided with external threads that match the housing, and one end of the plug assembly is provided with a plug.

[0009] Preferably, the front chuck, the coil frame, and the rear chuck are all provided with mounting holes inside, and the front chuck, the rear chuck, and the coil frame are detachably connected to the top rod through the mounting holes in sequence.

[0010] Preferably, the irregularly shaped elastic rubber ring has a sleeve hole inside, and the irregularly shaped elastic rubber ring is detachably connected to the top rod through the sleeve hole. The clamping block and the E-shaped retaining spring both have fixing holes inside. One end of the outer side of the top rod has a retaining groove, and the E-shaped retaining spring is detachably connected to the top rod through the retaining groove.

[0011] Preferably, a winding groove is provided at one end of the outer side of the coil frame, and the enameled wire is detachably connected to the coil frame through the winding groove.

[0012] Preferably, a through hole is provided in the middle position inside the buffer aluminum pad, and the buffer aluminum pad is detachably connected to the top rod through the through hole.

[0013] Preferably, the outer side of the filter screen fixing seat is provided with external threads, one end of the housing is provided with a mounting groove, and the inner side of the mounting groove is provided with internal threads that match the filter screen fixing seat.

[0014] Preferably, one end of the pilot valve stem is provided with a threaded mounting groove, and the pilot valve stem is detachably connected to one end of the push rod through the threaded mounting groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention fixes the front chuck, rear chuck, and coil frame with enameled wire by installing a shaped elastic rubber ring, a clamping block, and an E-shaped retaining ring at the tail end of the top rod. More importantly, it adjusts to a clearance fit, eliminating the need for interference fit and avoiding product deformation caused by the poor interference fit performance of stainless steel. This simplifies product performance debugging and maintenance. When adjusting or replacing parts, only the E-shaped retaining ring needs to be disassembled for easy disassembly and assembly, significantly reducing maintenance difficulty and cost, and improving the performance of the pilot proportional pressure reducing valve. Secondly, the filter screen can be installed and removed through the filter screen fixing seat. Together with the filter screen and filter screen, the filter screen effectively prevents impurities from entering the pilot proportional pressure reducing valve, avoiding blockage of the valve body and improving the service life and reliability of the valve body. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a cross-sectional view of a conventional valve body.

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] Figure 3 This is an enlarged view of utility model A.

[0021] In the diagram: 1. Housing; 101. Plug assembly; 102. Plug sealing gasket; 103. Plug retaining ring; 2. Top rod; 201. Front chuck; 202. Coil frame; 203. Enamelled wire; 204. Rear chuck; 205. Irregularly shaped elastic rubber ring; 206. Clamping block; 207. E-shaped snap ring; 208. Spring; 209. Buffer aluminum pad; 3. Pilot valve stem; 301. Pilot valve seat; 302. Filter screen one; 303. Filter screen two; 304. Filter screen fixing seat. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 2-3 This utility model provides an embodiment of a pilot-operated proportional pressure reducing valve that does not require interference fitting: A pilot-operated proportional pressure reducing valve that does not require interference fitting includes a housing 1 and a push rod 2. The housing 1 includes a plug assembly 101, a plug sealing gasket 102, and a plug retaining ring 103. The plug assembly 101 is located at one end of the housing 1, the plug sealing gasket 102 is located on the outer side of one end of the plug assembly 101, and the plug retaining ring 103 is located at one end inside the housing 1. The plug sealing gasket 102 and the plug retaining ring 103 facilitate a tight fit between the plug assembly 101 and the housing 1. The push rod 2 includes a front chuck 201, a coil frame 202, a rear chuck 204, a shaped elastic rubber ring 205, a clamping block 206, and an E-shaped retaining ring 207. The front chuck 201 is located at one end outside the push rod 2, and the coil frame 202... Located at the other end of the outside of the push rod 2, the rear chuck 204 is located at one end inside the coil frame 202. The irregularly shaped elastic rubber ring 205 is located on the outside of one end of the push rod 2, which plays a buffering role and makes the pilot proportional pressure reducing valve more durable. The clamping block 206 is located on the outside of the push rod 2 near the irregularly shaped elastic rubber ring 205. The E-shaped snap ring 207 is located on the outside of the push rod 2 near the clamping block 206. The clamping block 206 can be installed at the tail end of the push rod 2 through the E-shaped snap ring 207, which facilitates the disassembly and maintenance of the pilot proportional pressure reducing valve. The outer side of the coil frame 202 near the front chuck 201 is provided with an enameled wire 203. A spring piece 208 is provided between the plug retaining ring 103 and the coil frame 202. The outer side of the push rod 2 away from the irregularly shaped elastic rubber ring 205 is provided with a buffer aluminum pad 209.

[0027] The plug assembly 101 has an external thread on its outer side that matches the inner wall of the housing 1, allowing it to be threadedly connected to the inner wall of the housing 1, thus enabling the plug assembly 101 to be disassembled and tightly installed. One end of the plug assembly 101 has an electrical insert containing conductive pins. These pins are electrically connected to the enameled wire 203 on the coil frame 202 via wires. When an external power source supplies power to the enameled wire 203 through the plug assembly 101, the coil inside the coil frame 202 generates electromagnetic force, driving the push rod 2 to move axially, thereby controlling the opening and closing of the pilot valve. The coil frame 202 is fitted onto the top... In the middle of rod 2, a winding groove is provided on its outer side. Enamelled wire 203 is wound around the coil frame 202 through the winding groove to form an electromagnetic coil. When the electromagnetic coil is energized, it generates electromagnetic force to drive the push rod 2 to move. The spring 208 is an elastic washer, whose function is to provide axial preload. After being fixed by the E-shaped retaining spring 207, it applies a stable axial pressure to the coil frame 202 and its front end components through its elastic deformation, ensuring a tight fit between the components, eliminating gaps, preventing loosening due to vibration or impact during use, and providing a stable reference point for the movement of the push rod 2.

[0028] Please refer to this carefully. Figure 2 The end of the push rod 2 away from the plug assembly 101 is provided with a pilot valve rod 3, and the end of the pilot valve rod 3 away from the push rod 2 is provided with a pilot valve seat 301, which facilitates the adjustment of the pilot valve rod 3. The outer side of the housing 1 near the pilot valve seat 301 is provided with a filter screen 302, and the end of the housing 1 away from the inside of the plug assembly 101 is provided with a filter screen 303. The inside of the housing 1 at the position of the filter screen 303 is provided with a filter screen fixing seat 304, which facilitates the installation and removal of the filter screen 303. The filter screen 302 and the filter screen 303 can achieve the filtering effect and prevent impurities from clogging the valve body.

[0029] Please refer to this carefully. Figure 2 and Figure 3The inner wall of the housing 1 has internal threads, and the outer side of the plug assembly 101 has external threads that match the housing 1, allowing for disassembly and assembly between the plug assembly 101 and the housing 1. One end of the plug assembly 101 has a plug for easy installation of the pilot proportional pressure reducing valve. The front chuck 201, coil frame 202, and rear chuck 204 all have mounting holes. The front chuck 201, rear chuck 204, and coil frame 202 are detachably connected to the push rod 2 through these mounting holes, allowing them to be installed on the outside of the push rod 2. The irregularly shaped elastic rubber ring 205 has a sleeve hole inside, allowing it to be detachably connected to the push rod 2. The irregularly shaped elastic rubber ring 205 is installed on the outside of the push rod 2. The clamping block 206 and E-shaped retaining ring 207 both have fixing holes inside. One end of the outside of the push rod 2 has a retaining groove. The E-shaped retaining ring 207 can be snapped onto the tail end of the top rod 2 via a slot and a detachable connection. A winding groove is provided on one end of the outer side of the coil frame 202. The enameled wire 203 is detachably connected to the coil frame 202 via the winding groove, allowing the enameled wire 203 to be installed on the outer side of the coil frame 202. A through hole is provided in the middle of the interior of the buffer aluminum pad 209, allowing for detachment and reassembly between the buffer aluminum pad 209 and the top rod 2. An external thread is provided on the outer side of the filter screen fixing seat 304, and an installation groove is provided at one end of the housing 1. An internal thread matching the filter screen fixing seat 304 is provided on the inner side of the installation groove, allowing for detachment and reassembly between the filter screen fixing seat 304 and the housing 1. A threaded installation groove is provided at one end of the interior of the pilot valve stem 3, allowing for detachment and reassembly between the pilot valve stem 3 and one end of the top rod 2.

[0030] Working principle: First, the pilot valve stem 3 is threadedly connected to the front end of the push rod 2 through its internal threaded mounting groove. Then, the assembled push rod 2 is inserted into the housing 1. Next, the front chuck 201, the coil frame 202 with enameled wire 203, and the rear chuck 204 are sequentially installed on the push rod 2. They are detachably clearance-fitted with the push rod 2 through their respective mounting holes. Subsequently, the irregularly shaped elastic rubber ring 205 and the clamping block 206 are sequentially installed at the tail end of the push rod 2. Finally, the E-shaped retaining ring 207 is engaged in the pre-set retaining groove at the tail end of the push rod 2, thereby axially fixing the relative positions of the clamping block 206, the irregularly shaped elastic rubber ring 205, the rear chuck 204, the coil frame 202, and the front chuck 201 on the push rod 2. This interference-free fitting method, based on clearance fit and axial fixation with E-shaped retaining rings, completely eliminates the product deformation problem caused by the poor performance of stainless steel interference fitting, ensuring the form and position tolerances of parts and avoiding the part deformation problem caused by traditional stainless steel interference fitting.

[0031] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pilot-operated proportional pressure reducing valve that does not require interference fitting, characterized in that: include The housing (1) includes a plug assembly (101), a plug sealing gasket (102) and a plug retaining ring (103). The plug assembly (101) is located at one end of the housing (1), the plug sealing gasket (102) is located on the outside of one end of the plug assembly (101), and the plug retaining ring (103) is located at one end inside the housing (1). The top rod (2) includes a front chuck (201), a coil frame (202), a rear chuck (204), a shaped elastic rubber ring (205), a clamping block (206), and an E-shaped retaining ring (207). The front chuck (201) is located at one end of the outside of the top rod (2), the coil frame (202) is located at the other end of the outside of the top rod (2), the rear chuck (204) is located at one end inside the coil frame (202), the shaped elastic rubber ring (205) is located on the outside of one end of the top rod (2), the clamping block (206) is located on the outside of the top rod (2) near the shaped elastic rubber ring (205), and the E-shaped retaining ring (207) is located on the outside of the top rod (2) near the clamping block (206).

2. The pilot-operated proportional pressure reducing valve without interference fitting according to claim 1, characterized in that: The outer side of the coil frame (202) near the front chuck (201) is provided with enameled wire (203), and a spring piece (208) is provided between the plug retaining ring (103) and the coil frame (202). The outer side of the top rod (2) away from the irregular elastic rubber ring (205) is provided with a buffer aluminum pad (209).

3. The pilot-operated proportional pressure reducing valve without interference fitting according to claim 1, characterized in that: The top rod (2) is provided with a pilot valve rod (3) at one end away from the plug assembly (101), and a pilot valve seat (301) is provided at one end away from the top rod (2). A filter screen one (302) is provided at one end of the outer side of the housing (1) near the pilot valve seat (301). A filter screen two (303) is provided at one end of the housing (1) away from the inside of the plug assembly (101). A filter screen fixing seat (304) is provided inside the housing (1) at the position of filter screen two (303).

4. The pilot-operated proportional pressure reducing valve without interference fitting according to claim 1, characterized in that: The inner wall of the housing (1) is provided with an internal thread, the outer side of the plug assembly (101) is provided with an external thread that matches the housing (1), and one end of the plug assembly (101) is provided with a plug.

5. The pilot-operated proportional pressure reducing valve without interference fitting according to claim 1, characterized in that: The front chuck (201), coil frame (202) and rear chuck (204) are all provided with mounting holes. The front chuck (201), rear chuck (204) and coil frame (202) are detachably connected to the top rod (2) through the mounting holes in sequence.

6. The pilot-operated proportional pressure reducing valve without interference fitting according to claim 1, characterized in that: The irregular elastic rubber ring (205) has a sleeve hole inside. The irregular elastic rubber ring (205) is detachably connected to the top rod (2) through the sleeve hole. The clamping block (206) and the E-shaped retaining ring (207) both have fixing holes inside. One end of the outer side of the top rod (2) has a retaining groove. The E-shaped retaining ring (207) is detachably connected to the top rod (2) through the retaining groove.

7. A pilot-operated proportional pressure reducing valve without interference fitting according to claim 2, characterized in that: The coil frame (202) has a winding groove at one end on the outside, and the enameled wire (203) is detachably connected to the coil frame (202) through the winding groove.

8. A pilot-operated proportional pressure reducing valve without interference fitting according to claim 2, characterized in that: The buffer aluminum pad (209) has a through hole in the middle position inside, and the buffer aluminum pad (209) is detachably connected to the top rod (2) through the through hole.

9. A pilot-operated proportional pressure reducing valve without interference fitting according to claim 3, characterized in that: The filter screen fixing seat (304) has an external thread on its outer side, and one end of the housing (1) has an installation groove, and the inner side of the installation groove has an internal thread that matches the filter screen fixing seat (304).

10. A pilot-operated proportional pressure reducing valve without interference fitting according to claim 3, characterized in that: The pilot valve stem (3) has a threaded mounting groove at one end, and the pilot valve stem (3) is detachably connected to one end of the top rod (2) through the threaded mounting groove.

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