Micro purge valve

Abstract

The utility model discloses a trace purge valve, which comprises a valve body, a pressing sleeve, a sealing ring and a filter element, an external thread part is formed at the position on the valve body matched with the pressing sleeve, a cavity extending along the length direction of the valve body is formed inside the valve body, a conical hole and a concave hole which are communicated with each other are formed inside one tail end of the valve body, the concave hole is communicated with the cavity, and the filter element is arranged in the cavity. A baffle is formed at the other tail end of the valve body, a micro hole communicated with the cavity is formed in the baffle, the sealing ring is installed in the concave hole and the conical hole after being arranged on the filter element in a sleeved mode, the outer side wall of the sealing ring is tightly attached to the inner side wall of the conical hole, the tail end, not provided with the sealing ring in a sleeved mode, of the filter element extends into the concave hole, and a plurality of filter holes are formed in the filter element. The trace purging valve is simple in structure, only one position of the whole structure is connected, one position of the whole structure is sealed, and four parts are arranged. The valve body and the pressing sleeve are sealed through conical surfaces, and the probability of damage to the sealing ring in the installation process is small.

Description

Technical fields:

[0001] This utility model relates to a micro-purge valve. Background technology:

[0002] Most purge valves currently on the market suffer from complex internal structures, numerous parts, multiple seals, irregular external shapes, and large sizes. This results in high precision requirements and high processing costs during the assembly process.

[0003] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Utility Model Content:

[0004] This utility model provides a micro-purge valve to solve the problems existing in the prior art. It has fewer parts, a simple structure, and a small size.

[0005] This utility model adopts the following technical solution: a micro-purge valve, including a valve body, a pressure sleeve, a sealing ring, and a filter element. The valve body has an external threaded portion at the position that mates with the pressure sleeve. The valve body has a cavity extending along its length. One end of the valve body has a conical hole and a concave hole that are connected to each other. The concave hole is connected to the cavity. The other end of the valve body has a baffle with micro-holes that are connected to the cavity. The sealing ring is fitted onto the filter element and installed in the concave hole and the conical hole. The outer wall of the sealing ring is in close contact with the inner wall of the conical hole. The end of the filter element without the sealing ring extends into the concave hole. The filter element has a plurality of filter holes.

[0006] Furthermore, the diameter of the concave hole is larger than the diameter of the cavity so that a stepped portion is formed at the position where the concave hole and the cavity connect.

[0007] Furthermore, the end of the filter element without a sealing ring extends into the recess and abuts against the stepped portion, and the circumferential outer wall of the end is in close contact with the inner wall of the recess.

[0008] Furthermore, an internal thread is formed on the pressure sleeve at a position opposite to the external thread of the valve body.

[0009] Furthermore, the pressure sleeve has a mounting hole for the end of the filter element adjacent to the sealing ring to be installed therein.

[0010] Furthermore, the end of the mounting hole adjacent to the sealing ring is chamfered to facilitate the installation of the pressure sleeve into the location of the filter element.

[0011] This invention has the following advantages: The micro-purge valve of this invention has a simple structure, with only one connection, one seal, and four parts. The valve body and the pressure sleeve use a conical seal, which reduces the probability of damaging the sealing ring during installation. Attached image description:

[0012] Figure 1 This is a schematic diagram of the inside of the valve body.

[0013] Figure 2 This is a schematic diagram of the internal structure of a micro-purge valve.

[0014] Figure 3 This is a partial schematic diagram of the interior of a micro-purge valve. Detailed implementation method:

[0015] To further understand the contents of this utility model, a more detailed description is provided below with reference to the accompanying drawings. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0016] This utility model discloses a micro-purge valve, comprising a valve body 1, a pressure sleeve 2, a sealing ring 3, and a filter element 4. An external thread (not shown) is formed on the valve body 1 at a position that mates with the pressure sleeve 2. A cavity 10 extending along the length of the valve body 1 is formed inside the valve body 1. At one end of the valve body 1, a conical hole 110 and a recess 111 are formed, communicating with each other. The recess 111 communicates with the cavity 10, and the diameter of the recess 111 is larger than the diameter of the cavity 10, resulting in a stepped portion 13 at the connection between the recess 111 and the cavity 10. At the other end of the valve body 1, a baffle 11 is formed, preventing communication between the cavity 10 and this end. Microholes 12 communicating with the cavity 10 are formed on the baffle 11.

[0017] After the sealing ring 3 is fitted onto the filter element 4, it is installed in the recess 111 and the conical hole 110, with the outer wall of the sealing ring 3 tightly against the inner wall of the conical hole 110. The end of the filter element 4 without the sealing ring 3 extends into the recess 111 and abuts against the stepped portion 13, with the circumferential outer wall of this end tightly against the inner wall of the recess 111. A plurality of filter holes (not shown) are formed in the filter element 4.

[0018] An internal thread (not shown) is formed on the pressure sleeve 2 at a position opposite to the external thread of the valve body 1. An installation hole 20 is formed on the pressure sleeve 2 for the end of the filter element 4 adjacent to the sealing ring 3 to be installed therein. A chamfer 200 is formed on the end of the installation hole 20 adjacent to the sealing ring 3. Due to the presence of the chamfer 200, it is convenient to install the pressure sleeve 2 to the position where the filter element 4 is located.

[0019] When the micro-purge valve of this utility model is working, due to the pressure difference, air flows from the inlet to the outlet. The flow rate of the gas is restricted by the filter element 4 with filter holes. At the same time, after the air passes through the filter element 4, some dust and particles that it may contain are filtered out. After the gas flows through the filter element 4, it flows to the micropores 12, and the gas flow rate is restricted again by the micropores 12, thereby achieving the effect of micro-purge gas.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A micro-purge valve, characterized in that: The valve body (1) includes a valve body (1), a pressure sleeve (2), a sealing ring (3), and a filter element (4). The valve body (1) has an external thread at the position where it mates with the pressure sleeve (2). The valve body (1) has an internal cavity (10) extending along its length. One end of the valve body (1) has a connected conical hole (110) and a recessed hole (111), which communicate with the cavity (10). The other end of the valve body (1)... A baffle (11) is formed, and micropores (12) communicating with the cavity (10) are formed on the baffle (11). The sealing ring (3) is fitted onto the filter element (4) and installed in the concave hole (111) and the conical hole (110). The outer side wall of the sealing ring (3) is tightly attached to the inner side wall of the conical hole (110). The end of the filter element (4) without the sealing ring (3) extends into the concave hole (111). A number of filter holes are formed in the filter element (4).

2. The micro-purge valve as described in claim 1, characterized in that: The diameter of the recess (111) is larger than the diameter of the cavity (10) so that a step (13) is formed at the position where the recess (111) and the cavity (10) are connected.

3. The micro-purge valve as described in claim 2, characterized in that: The end of the filter element (4) without the sealing ring (3) extends into the recess (111) and abuts against the step portion (13), and the circumferential outer wall of the end is in close contact with the inner wall of the recess (111).

4. The micro-purge valve as described in claim 3, characterized in that: An internal thread is formed on the pressure sleeve (2) at a position opposite to the external thread of the valve body (1).

5. The micro-purge valve as described in claim 4, characterized in that: The pressure sleeve (2) has an installation hole (20) for mounting the end of the filter element (4) adjacent to the sealing ring (3).

6. The micro-purge valve as described in claim 5, characterized in that: The mounting hole (20) has a chamfer (200) at the end of the sealing ring (3) to facilitate the installation of the pressure sleeve (2) to the position of the filter element (4).

Images