Internal limiting part for proportional valve

Abstract

The utility model discloses an internal limiting part for a proportional valve, which comprises a single-piece valve body, and the single-piece valve body is provided with a compensation valve core, a spring component, a sealing plug and an O-shaped sealing ring; and the O-shaped sealing ring is provided with a teflon check ring. The utility model relates to a single-piece valve body thread design and a sealing plug matched with the single-piece valve body thread design, an O-shaped sealing ring is provided with a teflon check ring, the structure is simplified, the machining difficulty is lowered, the performance is stable, and disassembly is easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to proportional valve field especially, it is an internal limiting part for proportional valve. BACKGROUND

[0002] The prior art PVG series proportional valve often adopts the screw plug structure without thread, the PVG series proportional valve requires small volume space, the design space is limited, and the bolt assembly interferes with the position of the sealing screw plug, which increases the design difficulty. In order to facilitate disassembly, the Danfoss company installs the O-shaped ring on the edge on the 7MM thick screw plug, and M6 threads for disassembly are also increased. This makes the screw plug strength wall thickness, and the hole depth needs to be forcibly controlled, thereby leading to increased size and processing difficulty.

[0003] Therefore, it is necessary to develop a new type of internal limiting part for proportional valve, which simplifies the structure and processing difficulty. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of internal limiting parts for proportional valve, and it is related to single valve body thread design, and sealing screw plug is matched therewith, four fluorine stop ring is provided with in O-shaped seal ring, simplify structure and processing difficulty, stable performance, easy to disassemble.

[0005] Technical scheme: the internal limiting part for proportional valve of the utility model, characterized by: including single valve body, single valve body is equipped with compensating valve core, spring assembly, sealing screw plug and O-shaped seal ring;O-shaped seal ring is equipped with four fluorine stop ring.

[0006] Among them, the main hole of the single valve body adopts threaded hole.

[0007] Among them, the sealing screw plug adopts threaded structure.

[0008] Among them, the single valve body is PVG series proportional valve.

[0009] Advantageous effects: compared with prior art, the utility model has the following remarkable advantages: the utility model relates to single valve body thread design, and sealing screw plug is matched therewith, four fluorine stop ring is provided with in O-shaped seal ring, simplify structure and processing difficulty, stable performance, easy to disassemble. Overall, little weight is not increased, and volume is not increased, and can be used in PVG series valve body. DRAWING DESCRIPTION

[0010] Figure 1 It is the structure schematic view of proportional valve internal limiting part of prior art;

[0011] Figure 2 It is the structure schematic view of the utility model;

[0012] Figure 1 is a single valve body; 2 is a compensation valve core; 3 is a spring assembly; 4 is a sealing screw; 5 is an O-shaped sealing ring; 6 is a four fluorine check ring. DETAILED DESCRIPTION

[0013] The technical scheme of the utility model is further described below in combination with the drawings and specific embodiments.

[0014] The utility model discloses a proportional valve internal limiting part, including single valve body 1, single valve body 1 is equipped with compensation valve core 2, spring assembly 3, sealing screw 4 and O-shaped sealing ring 5, and O-shaped sealing ring 5 is equipped with four fluorine check ring 6, wherein the main hole of single valve body 1 adopts the threaded hole, and the sealing screw 4 adopts the threaded structure, and the single valve body 1 is the PVG series proportional valve.

[0015] As Figure 1 The proportional valve internal limiting part of the prior art Danfoss structure includes single valve body 1, compensation valve core 2, spring assembly 3, sealing screw 4 and O-shaped sealing ring 5.

[0016] As Figure 2 The utility model is improved, the main hole of single valve body 1 adopts the threaded hole, compensation valve core 2 and spring assembly 3 do not need to be improved, sealing screw 4 is improved into the threaded structure, and O-shaped sealing ring 5 is added four fluorine check ring 6, improves the sealing performance of O-shaped ring, prevents the assembly cut ring, ensures that there is no external leakage, and is more convenient to assemble and use.

[0017] Although the single valve structure is limited in space, but after reasonable adjustment design structure, sealing screw 4 is lengthened, and bolt hole is processed on the threaded plug, so that it is convenient to install. At the same time, without tooling, before screwing 100N on the screw plug, the threaded hole contacts the valve body, and the threaded hole overcomes the spring force, and is assembled to the corresponding position, and the O-shaped ring on the screw plug is provided with four fluorine check ring 6, which ensures the sealing performance. Without interference fit, whether assembly and disassembly is very convenient, even if occasional problems appear on the market, it also does not need to return to the factory for repair, and can be disassembled and maintained at the customer. After using the threaded structure, the sealing assembly space is large, and the tooling is not needed for assembly, and the assembly can be directly manually assembled.

Claims

1. An internal limit part for a proportional valve, characterized by: The single-piece valve body (1) is provided with a compensating valve core (2), a spring assembly (3), a sealing screw (4) and an O-shaped sealing ring (5), wherein the O-shaped sealing ring (5) is provided with a Teflon stop ring (6).

2. The internal limit part for a proportional valve according to claim 1, characterized in that: The main hole of the single-piece valve body (1) is a threaded hole.

3. The internal limit part for a proportional valve according to claim 1, characterized in that: The sealing screw (4) is provided with a threaded structure.

4. The internal limit part for a proportional valve according to claim 1, characterized in that: The single-piece valve body (1) is a PVG series proportional valve.

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