Built-in pressure relief hole type guide pillar

Abstract

The built-in pressure relief hole type guide pillar comprises a pressing section and an extending section, the pressing section is connected with one end of the extending section, the face, close to the extending section, of the pressing section is a pressing face, the pressing face is located on the side, away from a partition, of a valve plate in an electromagnetic type gas emergency cut-off valve, and the valve plate is provided with a through hole for the extending section to penetrate through. The pressing section is used for pressing the pressing surface, the pressing surface is used for opening and closing a through hole in a valve block in the electromagnetic type gas emergency cut-off valve, the pressing section, the extension section or the valve rod is connected to the valve block through an elastic piece, the elastic piece is used for keeping the pressing surface pressed on the valve block, a pressure relief hole is formed in the extension section, and a cavity above the valve block and a cavity below the valve block can be communicated through the pressure relief hole. The built-in pressure relief hole type guide pillar solves the problem that in the prior art, the production cost is increased due to the fact that a pressure relief piece and an assembly rod are arranged in a separated mode.

Description

Technical Field

[0001] The utility model relates to an electromagnetic gas emergency cut-off valve accessory, in particular to a built-in pressure relief hole type guide column. Background Art

[0002] like Figure 1 as well as Figure 2 As shown, in the prior art, the electromagnetic gas emergency shut-off valve includes: a valve body, a valve stem, a rod driving mechanism, a valve plate and a pressure relief mechanism. An air inlet hole is opened in one end of the valve body, an air outlet hole is opened in the other end of the valve body, and a baffle is formed in the middle of the valve body. The baffle separates the air inlet hole and the air outlet hole, and the baffle is provided with an opening and closing hole. The opening and closing hole is used to connect the air inlet hole and the air outlet hole. A valve plate is installed in the valve body, and the valve plate is used to open and close the opening and closing hole. The valve plate is installed on the valve stem, and the valve stem is driven to rise and fall by the rod driving mechanism. A pressure relief mechanism is installed at the connection between the valve stem and the valve plate, and the air inlet hole is above the baffle. When the valve plate closes the opening and closing hole for a period of time, the air pressure above the air inlet hole is very large, and pressure relief is required to make the valve plate away from the baffle. Therefore, a pressure relief mechanism is required. In general, the pressure relief mechanism includes: a pressure relief plate, an assembly rod and a first spring. The top surface of the valve plate is concave to form a groove, and the pressure relief plate is installed in the groove. The groove surrounds the pressure relief hole. The pressure relief hole is opened on the valve plate. The pressure relief plate is clamped between the assembly rod and the valve stem. The valve stem and the assembly rod are connected by threads. The valve plate can be lifted and lowered relative to the valve stem and the assembly rod. A nut is threaded at the bottom of the assembly rod. A first spring is installed between the nut and the valve plate. The first spring is passed through by the assembly rod. When the air pressure in the air inlet is high, when the valve plate is pulled open, the valve plate has resistance to lowering relative to the valve stem and the assembly rod. The pressure relief hole opened on the valve plate is opened by the pressure relief plate to achieve pressure relief. Although the pressure relief mechanism in the prior art can achieve pressure relief, the pressure relief mechanism still has the disadvantage that the pressure relief plate is assembled on the valve stem through the assembly rod, and the pressure relief plate and the assembly rod need to be produced separately, resulting in increased production costs, which means that one more pressure relief plate needs to be produced to achieve pressure relief. The cost of one more pressure relief plate reduces market competitiveness. Utility Model Content

[0003] The utility model provides a guide column with a built-in pressure relief hole, which solves the problem of increased production cost caused by the separate arrangement of the pressure relief sheet and the assembly rod in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a built-in pressure relief hole type guide column, comprising: a clamping section and an extension section, the clamping section is connected to one end of the extension section, the surface of the clamping section close to the extension section is the clamping surface, the clamping surface is located on the side of a valve plate in an electromagnetic gas emergency shut-off valve away from a baffle, the valve plate opens and closes a hole on the baffle, the baffle in the electromagnetic gas emergency shut-off valve takes in air from one side of the valve plate, the valve plate is provided with a through hole for the extension section to pass through, the clamping surface is used for opening and closing the through hole on the valve plate in the electromagnetic gas emergency shut-off valve, an elastic member is installed on the valve plate, the elastic member is used to keep the clamping surface pressed against the valve plate, the extension section is provided with a pressure relief hole, and the pressure relief hole can connect the cavities on both sides of the baffle.

[0006] Preferably, the pressure relief hole includes: a first hole section and a second hole section, the end surface of the extension section facing away from the clamping section is recessed to form the first hole section, the side wall of the extension section is provided with a second hole section, the second hole section is connected to the first hole section, and the second hole section is located in the extension section near the clamping section.

[0007] Preferably, the connection between the pressing section and the extending section is recessed to form an annular groove, and a sealing ring is installed in the annular groove.

[0008] Preferably, the sealing ring is connected to the inner wall of the annular groove via an adhesive layer.

[0009] Preferably, the elastic member is a second spring, an extension section passes through the second spring, a mounting plate is connected to the extension section, and the second spring is located between the valve plate and the mounting plate.

[0010] Preferably, the mounting plate is threadedly connected to the extension section.

[0011] Preferably, the end surface of the clamping section is recessed to form an insertion hole for the valve stem to be inserted into, and a mounting hole is provided on the side wall of the clamping section for the mounting member to pass through, and the mounting member connects the clamping section and the valve stem.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the present application, the outer diameter of the clamping section is set to be larger than the outer diameter of the extension section, thereby forming a clamping surface, which can block the perforations on the valve plate, so that when the valve stem is lowered to close the opening and closing holes on the partition of the electromagnetic gas emergency shut-off valve, the clamping surface can close the perforations on the valve plate under the elastic force of the elastic member, thereby achieving complete gas cut-off. Then, in the present application, a pressure relief hole is set on the extension section, so that when the valve plate opens the opening and closing holes, when the air pressure is high, the valve plate is pushed to move relative to the valve stem, and one end of the pressure relief hole is connected to the air inlet, and the other end of the pressure relief hole is always connected to the air outlet, so that the pressure relief effect can be achieved. At the same time, the pressure relief is not achieved by setting the gap size between the extension section and the inner wall of the perforation, but by directly opening the pressure relief hole on the extension section, and the pressure relief speed is also faster. In the present application, the extension section and the clamping section can be integrally formed in the mold and made into one component, avoiding the need to produce the pressure relief sheet in the prior art and resulting in increased production costs, greatly improving the market competitiveness of the enterprise. This structure is used in high-inlet and low-outlet valves (i.e. valves in which the greater the fluid pressure, the greater the sealing pressure).

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an existing pressure relief mechanism.

[0016] Figure 2 It is a cross-sectional view of an existing pressure relief mechanism.

[0017] Figure 3 It is a schematic diagram of the structure of the guide column with built-in pressure relief hole in this application.

[0018] Figure 4 It is a cross-sectional view of the guide column with built-in pressure relief hole in this application.

[0019] Figure 5 It is a cross-sectional view of the built-in pressure relief hole guide column in Example 1 in the electromagnetic gas emergency shut-off valve.

[0020] Figure 6 It is a cross-sectional view of the built-in pressure relief hole guide column in Example 2 in the electromagnetic gas emergency shut-off valve.

[0021] Figure numerals: pressing section 1, pressing surface 11, extension section 2, pressure relief hole 20, first hole section 201, second hole section 202, annular groove 3, sealing ring 4, elastic member 5, valve plate 6, through hole 60, valve body 7, opening and closing hole 70, valve cover 71, valve stem 8, pressure relief plate 91, assembly rod 92, first spring 93, mounting plate 10. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0023] Embodiment 1:

[0024] like Figures 3 to 5 As shown, the utility model discloses a built-in pressure relief hole type guide column, comprising: a clamping section 1 and an extension section 2, the clamping section 1 is connected to one end of the extension section 2, the surface of the clamping section 1 close to the extension section 2 is a clamping surface 11, the clamping surface 11 is located on the side of the valve plate 6 in the electromagnetic gas emergency shut-off valve away from the baffle, the valve plate 6 opens and closes the baffle opening and closing hole, the baffle in the electromagnetic gas emergency shut-off valve takes in air from one side of the valve plate 6, the valve plate 6 is provided with a through hole 60 for the extension section 2 to pass through, the clamping surface 11 is used to open and close the through hole 60 on the valve plate 6 in the electromagnetic gas emergency shut-off valve, an elastic member 5 is installed on the valve plate 6, the elastic member 5 is used to keep the clamping surface 11 pressed against the valve plate 6, and a pressure relief hole 20 is provided on the extension section 2, and the pressure relief hole 20 can connect the cavities on both sides of the baffle.

[0025] The pressure relief hole 20 includes: a first hole section 201 and a second hole section 202. The end surface of the extension section 2 facing away from the pressing section 1 is recessed to form the first hole section 201. The side wall of the extension section 2 is provided with a second hole section 202. The second hole section 202 is connected with the first hole section 201. The second hole section 202 is located at a position of the extension section 2 close to the pressing section 1. Thus, when the second hole section 202 emerges from the valve plate 6, the second hole section 202 can be connected with the air inlet, and then the second hole section 202 can be connected with the air outlet through the first hole section 201, so as to balance the air pressure between the air inlet and the air outlet, so that the valve plate 6 can be raised to the position of opening the opening and closing hole 70 by the valve stem 8 and the stem driving mechanism, so as to avoid the influence of air pressure on the opening of the valve plate 6. When the second hole section 202 does not emerge from the valve plate 6, the pressing surface 11 can block the through hole 60 on the valve plate 6.

[0026] The connection between the pressing section 1 and the extension section 2 is sunken to form an annular groove 3, and a sealing ring 4 is installed at the annular groove 3. The sealing effect of the pressing surface 11 blocking the through hole 60 on the valve plate 6 is improved. The annular groove 3 positions the sealing ring 4, reducing the probability of the sealing ring 4 being separated from the extension section 2 and the pressing section 1.

[0027] The sealing ring 4 is connected to the inner wall of the annular groove 3 via an adhesive layer, so that the sealing ring 4 can be installed in the annular groove 3 .

[0028] The elastic member 5 is a second spring, through which the extension section 2 passes, and a mounting plate 10 is connected to the extension section 2, and the second spring is located between the valve plate 6 and the mounting plate 10. This is the installation method of the elastic member 5 when the elastic member 5 is the second spring, and of course there are other installation methods for the elastic member 5.

[0029] The mounting plate 10 is threadedly connected to the extension section 2, so that the mounting plate 10 is mounted on the extension section 2.

[0030] The pressure relief hole 20 makes full use of the extension section 2 that passes through the elastic member 5, so that the second hole section 202 can be connected to the air inlet hole, and the first hole section 201 is always connected to the air outlet hole.

[0031] If a certain section of the extension section 2 is set to be small and the valve stem 8 is not guided well, it is inevitable that the valve stem 8 will deflect and the pressure relief position will be blocked. Therefore, an extension section 2 with a pressure relief hole 20 of uniform size is set. The extension section 2 can guide the movement of the valve plate 6 and shall not affect the entry of the second hole section 202 into the air inlet.

[0032] Embodiment 2:

[0033] The difference between this embodiment and the first embodiment is that the installation position of the elastic member 5 is different, and the other structures are the same.

[0034] like Figure 6 As shown, a valve cover 71 is buckled on the valve body 7, and the valve stem 8 passes through the valve cover 71. An elastic member 5 is installed between the valve cover 71 and the valve plate 6, and the elastic member 5 allows the valve stem 8 to pass through.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A guide column with a built-in pressure relief hole, characterized in that: include: A pressing section (1) and an extension section (2), wherein the pressing section (1) is connected to one end of the extension section (2), the surface of the pressing section (1) close to the extension section (2) is a pressing surface (11), the pressing surface (11) is located on the side of the valve plate (6) in the electromagnetic gas emergency shut-off valve away from the baffle, the valve plate (6) opens and closes the opening and closing hole on the baffle, the baffle in the electromagnetic gas emergency shut-off valve takes in air from one side of the valve plate (6), the valve plate (6) is provided with a through hole (60) for the extension section (2) to pass through, the pressing surface (11) is used to open and close the through hole (60) on the valve plate (6) in the electromagnetic gas emergency shut-off valve, an elastic member (5) is installed on the valve plate (6), the elastic member (5) is used to keep the pressing surface (11) pressed against the valve plate (6), the extension section (2) is provided with a pressure relief hole (20), and the pressure relief hole (20) can connect the cavities on both sides of the baffle.

2. A guide column with a built-in pressure relief hole according to claim 1, characterized in that: The pressure relief hole (20) comprises: a first hole section (201) and a second hole section (202); the end surface of the extension section (2) facing away from the pressing section (1) is recessed to form the first hole section (201); the side wall of the extension section (2) is provided with a second hole section (202); the second hole section (202) is connected to the first hole section (201); and the second hole section (202) is located at a position of the extension section (2) close to the pressing section (1).

3. A guide column with a built-in pressure relief hole according to claim 2, characterized in that: The connection between the pressing section (1) and the extending section (2) is recessed to form an annular groove (3), and a sealing ring (4) is installed at the annular groove (3).

4. A guide column with a built-in pressure relief hole according to claim 3, characterized in that: The sealing ring (4) is connected to the inner wall of the annular groove (3) via an adhesive layer.

5. A guide column with a built-in pressure relief hole according to any one of claims 1 to 4, characterized in that: The elastic member (5) is a second spring, and the extension section (2) passes through the second spring. The extension section (2) is connected to a mounting plate (10), and the second spring is located between the valve plate (6) and the mounting plate (10).

6. A guide column with a built-in pressure relief hole according to claim 5, characterized in that: The mounting plate (10) is threadedly connected to the extension section (2).

7. A guide column with a built-in pressure relief hole according to claim 5, characterized in that: The end surface of the clamping section (1) is recessed to form an insertion hole for the valve stem (8) to be inserted into. The side wall of the clamping section (1) is provided with a mounting hole for the mounting member to pass through. The mounting member connects the clamping section (1) and the valve stem (8).

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