Anti-explosion valve

Abstract

The present invention provides an explosion-proof valve, comprising a valve body and a valve leaf slidably disposed in the valve body, and further comprising two sets of reset mechanisms, the two sets of reset mechanisms being respectively disposed at both ends of the valve leaf and being fixed to the valve body, the reset mechanisms comprising a special-shaped spring, the middle section of the special-shaped spring being a fixed section fixedly connected to the valve body, the two ends of the special-shaped spring being support portions extending into the valve leaf, and the two support portions being symmetrically distributed about the central cross section of the valve leaf. The present invention enables the valve leaf to be fixed stably, without shaking or trembling left and right, and improves the tightness of the valve leaf closing.

Description

Technical Field

[0001] The invention relates to a valve body structure, in particular to an anti-explosion valve. Background Art

[0002] At present, the springs used in the reset mechanism of the explosion-proof valve are mainly cylindrical helical compression or tension springs. For example, an explosion-proof valve disclosed in ZL201920924591.X, see Figure 1 As shown, a slide bar 12 perpendicular to the valve port is provided in the valve body 11, a valve leaf 14 is slidably inserted on the slide bar 12, and two sets of springs 13 are respectively inserted at both ends of the slide bar 12, that is, respectively located between the valve leaf 14 and the two valve ports, and the valve leaf 14 is positioned in the middle of the valve cavity so that the two valve ports are connected. This reset mechanism composed of the slide bar and the cylindrical helical compression spring makes the anti-explosion valve have certain limitations, as follows:

[0003] (1) The spring support structure (i.e. the slide bar) is at the center of the valve leaf. The valve leaf will shake or vibrate left and right under the action of wind during ventilation. This vibration will bring uncertainty to the normal closing of the valve leaf and may cause the valve leaf to close loosely. In addition, this vibration will also cause the valve leaf to collide with the slide bar constantly, making noise;

[0004] (2) There is a small gap between each adjacent spiral of the cylindrical coil spring, which is easy to accumulate dust and lint. After the explosion-proof valve is used for ventilation for a period of time, a lot of dust and lint will accumulate on the cylindrical coil spring, which will prevent the spring from being compressed normally, resulting in the valve leaf not closing tightly.

[0005] Therefore, an explosion-proof valve is needed that ensures that the valve leaf is closed normally and tightly. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an anti-explosion valve for solving the problem that the reset mechanism of the anti-explosion valve in the prior art is prone to dust accumulation and affects the closure.

[0007] To achieve the above-mentioned purpose and other related purposes, the present invention provides an anti-explosion valve, including a valve body and a valve leaf slidably disposed in the valve body, and also including two sets of reset mechanisms, the two sets of reset mechanisms are respectively disposed at both ends of the valve leaf and fixed to the valve body, the reset mechanism includes a special-shaped spring, the middle section of the special-shaped spring is a fixed section fixedly connected to the valve body, the two ends of the special-shaped spring are support portions extending into the valve leaf, and the two support portions are symmetrically distributed about the central cross-section of the valve leaf.

[0008] Preferably, the valve leaf is a hollow structure with reinforcing ribs inside the valve leaf, which divide the inner cavity of the valve leaf into a middle cavity and two side cavities. Each group of the reset mechanism includes two special-shaped springs, and the supporting part of one of the special-shaped springs extends into the middle cavity of the valve leaf, and the two supporting parts of the other special-shaped spring extend into the two side cavities of the valve leaf respectively.

[0009] Preferably, the end of the support portion is an annular support ring.

[0010] Preferably, the two special-shaped springs are installed in opposite directions.

[0011] Preferably, the valve body comprises a main shell body with openings at both ends and an end cover for closing the openings, the main shell body is provided with two valve ports which are opposite to each other and parallel to the valve leaf, and the reset mechanism is fixed on the end cover.

[0012] Preferably, the reset mechanism further includes a positioning plate, and the positioning plate and the end cover clamp the fixed section of the special-shaped spring and are fixed by fixing bolts.

[0013] As described above, the explosion-proof valve of the present invention has the following beneficial effects: a reset structure is fixed on the valve body and arranged at both ends relative to the valve leaf, both ends of the special-shaped spring have support parts extending into the valve leaf, and the two support parts are symmetrically distributed about the central cross-section of the valve leaf. On the one hand, the two symmetrically arranged support parts can fix the valve leaf stably without shaking or vibrating left and right; on the other hand, the special-shaped spring structure is not easy to accumulate dust, and its placement at both ends of the valve leaf will not directly affect the sliding process of the valve leaf, thereby improving the tightness of the valve leaf closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a schematic diagram of an anti-explosion valve in the prior art.

[0015] Figure 2 Shown is a schematic diagram of the anti-explosion valve of the present invention.

[0016] Figure 3 Display as Figure 2 AA line section view in.

[0017] Figure 4 Display as Figure 2 BB line section view in.

[0018] Figure 5 Shown is a schematic diagram of an embodiment of a reset mechanism.

[0019] Figure 6 Display as Figure 5 Top view of the illustrated embodiment.

[0020] Figure 7A schematic diagram of an embodiment of a special-shaped spring is shown.

[0021] Component number description

[0022] 1 Valve body

[0023] 2 valve leaves

[0024] 3 Sliders

[0025] 4 Special-shaped springs

[0026] 41 First special-shaped spring

[0027] 42 Second special-shaped spring

[0028] 401 Fixed segment

[0029] 402 Support

[0030] 403 Support ring

[0031] 5 Positioning plate

[0032] 6 End cap

[0033] 7 Fixing bolts

[0034] 11 Valve body

[0035] 12 Sliders

[0036] 13 Spring

[0037] 14 Valve leaf DETAILED DESCRIPTION

[0038] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0039] See also Figures 1 to 7 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0040] For the convenience of description, in this specification, the direction of airflow flow in the ventilation of the explosion-proof valve is referred to as the up-down direction, the direction perpendicular to the up-down direction and the same as the extension direction of the valve port on the valve body is referred to as the length direction of the valve leaf, and the direction perpendicular to the up-down direction and the length direction of the valve leaf is defined as the width direction of the valve leaf. In this specification, the two ends of the valve leaf are the two ends of the length direction of the valve leaf.

[0041] like Figures 2 to 7 As shown, the present invention provides an explosion-proof valve, comprising a valve body 1 and a valve leaf 2 slidably disposed in the valve body 1, the valve body 1 being provided with opposite valve ports, and the valve leaf 2 being arranged parallel to the valve ports; it also comprises two sets of reset mechanisms, the two sets of reset mechanisms being respectively disposed at two ends of the valve leaf 2 and fixed to the valve body 1, the reset mechanism comprising a special-shaped spring 4, the middle section of the special-shaped spring 4 being a fixed section 401 fixedly connected to the valve body 1, the two ends of the special-shaped spring being support portions 402 extending into the valve leaf 2, and the two support portions 402 being symmetrically distributed about a central cross section of the valve leaf 2 (the central cross section of the valve leaf 2 in this specification refers to a symmetrical central cross section perpendicular to the width direction of the valve leaf).

[0042] The present embodiment adopts a reset structure which is fixed on the valve body 1 and arranged at both ends relative to the valve leaf 2. Both ends of the special-shaped spring 4 have support portions 402 extending into the valve leaf 2, and the two support portions 402 are symmetrically distributed about the central cross-section of the valve leaf 1. On the one hand, the two symmetrically arranged support portions 402 can fix the valve leaf 1 very stably without shaking or vibrating left and right; on the other hand, the structure of the special-shaped spring 4 is not easy to accumulate dust, and its placement at both ends of the valve leaf 2 will not directly affect the sliding process of the valve leaf 2, thereby improving the tightness of the valve leaf closure.

[0043] In the explosion-proof valve of this embodiment, in the normal ventilation state, the valve leaf 2 is in the middle position of the valve body, and the two opposite valve ports on the valve body 1 are connected; in the explosion-proof state, the valve leaf 2 moves to the top or bottom of the valve body 1 under the action of the shock wave, and contacts the valve body 1 to close the valve port, thereby achieving the explosion-proof effect. After the shock wave disappears, the valve leaf 2 returns to the initial position (the middle position of the valve body) under the elastic force of the special-shaped spring 4, and the valve port is opened to restore the normal ventilation state.

[0044] The explosion-proof valve in this embodiment is provided with a slide bar 3, and holes for passing the slide bar 3 are provided at both ends of the valve leaf 2, that is, the valve leaf 2 slides along the slide bar 3, and the main function of the slide bar 3 is to limit the movement direction of the valve leaf 2 and guide the valve leaf 2 to move up and down. The valve body 1 and the valve leaf 2 are made of aluminum alloy extruded profiles. Since the integral extrusion process is adopted, the structural rigidity and strength of the valve body 1 and the valve leaf 2 are guaranteed; at the same time, the aluminum alloy has the advantages of light weight and corrosion resistance. The light weight ensures that the valve leaf 2 can be quickly closed in the event of an explosion, and the reduced closing time is conducive to protecting the air conditioning pipeline and equipment behind the valve; generally, the on-site environment prone to explosion is relatively harsh, with more corrosive gases, and the anti-corrosion requirements for equipment are relatively high. The use of aluminum alloy has a better anti-corrosion effect than steel.

[0045] In this embodiment, the specific structure of the above-mentioned special-shaped spring can be: Figure 7 As shown, it is made of bent elastic steel wire, wherein the middle section forms a frame-shaped fixed section 401, and the support parts 402 at both ends form an angle with the frame, thereby forming an elastic force to reset the valve leaf 2. In order to better support the valve leaf 2, the end of the support part 402 is an annular support ring 403. The special-shaped spring is not limited to this, and it only needs to be fixed to the valve body and have a support part extending into the valve leaf to reset the valve leaf.

[0046] The valve body 1 of this embodiment includes a main housing with openings at both ends and an end cover 6 that closes the openings. The main housing is provided with two valve ports that are opposite to each other and parallel to the valve leaf 2. The reset mechanism is fixed on the end cover 6. The detachable end cover is provided to facilitate the installation and positioning of the reset mechanism. In order to better fix the above-mentioned special-shaped spring, see Figures 3 to 6 As shown, the reset mechanism in this embodiment further includes a positioning plate 5 , and the positioning plate 5 and the end cover 6 clamp the fixed section 402 of the special-shaped spring 4 and are fixed by fixing bolts 7 .

[0047] In order to make the valve leaf 2 slide smoothly and avoid vibration, see Figure 5 and Figure 7As shown, the valve leaf 2 of this embodiment is a hollow structure, and a reinforcing rib is provided inside the valve leaf 2. The reinforcing rib divides the inner cavity of the valve leaf into an intermediate cavity and two side cavities. Each set of reset mechanisms includes two special-shaped springs, namely a first special-shaped spring 41 and a second special-shaped spring 42, and the supporting portion of one of the special-shaped springs (namely the second special-shaped spring 42) extends into the intermediate cavity of the valve leaf 2, and the two supporting portions of the other special-shaped spring (the first special-shaped spring 41) extend into the two side cavities of the valve leaf, respectively. In this embodiment, two special-shaped springs 4 are provided at each end of the valve leaf, and each special-shaped spring 4 extends with two legs (namely the above-mentioned supporting portion 402) for supporting the valve leaf 2. In this way, both ends of the valve leaf 2 are evenly supported by four supporting portions 402. This spring structure can fix the valve leaf 2 stably and will not shake or vibrate left and right. In addition, this spring structure is not easy to accumulate dust, and no spring coil is exposed in the sliding direction of the valve leaf, which can ensure the tightness of the valve leaf closing. In order to better reset the above-mentioned valve leaf, see Figure 5 and Figure 6 As shown, in this embodiment, the two special-shaped springs are installed in opposite directions, that is, the supporting portions 402 of the first special-shaped spring 41 and the second special-shaped spring 42 face oppositely, which facilitates the bidirectional resetting of the valve leaf.

[0048] The valve leaf can also be a solid structure, which only needs to allow the two ends of the special-shaped spring to extend into the support for easy reset. The two ends of the special-shaped spring (i.e. the two supporting parts) are symmetrically distributed about the central section of the valve leaf, which achieves the stability of the valve leaf and prevents it from shaking or shaking left and right.

[0049] More preferably, the explosion-proof valve in this embodiment has two valve leaves 2, and each valve leaf 2 is provided with a set of the above-mentioned reset mechanism at both ends, and each set of reset mechanism includes two special-shaped springs 4 installed in opposite directions, and a positioning plate 5, and the two special-shaped springs are fixed to the end cover 6 through the positioning plate 5 and the fixing bolts 7. The support portion 402 of the special-shaped spring 4 extends into the inner cavity of the valve leaf 2 to support and reset the valve leaf; the four support portions 402 are evenly distributed in the valve leaf, so that the valve leaf 2 can be fixed very stably without shaking or trembling left and right.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An explosion-proof valve, comprising a valve body and a valve leaf slidably disposed in the valve body, characterized in that: It also includes two sets of reset mechanisms, which are respectively placed at both ends of the valve leaf and fixed to the valve body. The reset mechanism includes a special-shaped spring, the middle section of the special-shaped spring is a fixed section fixedly connected to the valve body, and the two ends of the special-shaped spring are support parts extending into the valve leaf, and the two support parts are symmetrically distributed about the central cross-section of the valve leaf.

2. The explosion-proof valve according to claim 1, characterized in that: The valve leaf is a hollow structure with reinforcing ribs inside. The reinforcing ribs divide the inner cavity of the valve leaf into a middle cavity and two side cavities. Each group of the reset mechanism includes two special-shaped springs, and the supporting part of one of the special-shaped springs extends into the middle cavity of the valve leaf, and the two supporting parts of the other special-shaped spring extend into the two side cavities of the valve leaf respectively.

3. The explosion-proof valve according to claim 1 or claim 2, characterized in that: The end of the supporting part is an annular supporting ring.

4. The anti-explosion valve according to claim 2, characterized in that: The two special-shaped springs are installed in opposite directions.

5. The explosion-proof valve according to claim 1, characterized in that: The valve body comprises a main shell body with openings at both ends and an end cover for closing the openings. The main shell body is provided with two valve ports which are opposite to each other and parallel to the valve leaf. The reset mechanism is fixed on the end cover.

6. The explosion-proof valve according to claim 5, characterized in that: The reset mechanism also includes a positioning plate, and the positioning plate and the end cover clamp the fixed section of the special-shaped spring and are fixed by fixing bolts.

Images