Water-cooling jacket type high-temperature plunger valve

Abstract

The invention relates to a water-cooling jacket type high-temperature plunger valve which comprises a valve body, a valve seat and a packing gland are installed at the two ends of the valve body respectively, a plunger is arranged in the valve body, the valve seat and the packing gland in a sliding mode, a gas sealing structure is arranged between the packing gland and the plunger, a valve body middle guide is arranged in one end of the valve body, and the plunger moves along the valve body middle guide. The valve seat is close to the valve body middle guide; a stuffing box is arranged in the other end of the valve body, a guide sleeve and a stuffing set are arranged in the stuffing box, a gland hole and a vent hole which are communicated with each other are formed in the stuffing gland, a first sealing ring, a gas sealing cavity and a second sealing ring are sequentially arranged in the gland hole, the gas sealing cavity is communicated with the vent hole, and the vent hole and the gas sealing cavity form a gas sealing structure. The valve seat and the equipment flange are of a welded integrated flush joint structure, the plunger is designed to be short in stroke, and the requirement for compact space installation is met.

Description

Technical Field

[0001] The invention belongs to the technical field of valves and relates to a water-cooled jacketed high-temperature plunger valve. Background Art

[0002] Photovoltaics, as a renewable energy source, is the main energy source in the future. my country is the world's largest photovoltaic producer. Polysilicon is the main raw material for manufacturing photovoltaic cells. At present, there are two main polysilicon production processes: the modified Siemens method and the silane fluidized bed method, of which the modified Siemens method is the mainstream route in the market. The main medium for polysilicon feeding is silicon powder, and nitrogen is used to assist feeding. The main components of the medium are flammable gases such as silicon carbide powder, activated carbon powder, nitrogen, and hydrogen. When the reactor reacts, the temperature in the reactor reaches 600°C. The valve switching frequency during the whole process is relatively high, and the movement stability of the valve is required to be high. Therefore, a discharge valve is needed to solve the on-site problem. Summary of the invention

[0003] The object of the present invention is to provide a water-cooled jacketed high-temperature plunger valve, which can solve the above-mentioned problems and ensure the safety and reliability of valve operation.

[0004] According to the technical solution provided by the present invention: a water-cooled jacketed high-temperature plunger valve includes a valve body, a valve seat and a packing gland are respectively installed at both ends of the valve body, a plunger is slidably arranged in the valve body, the valve seat and the packing gland, a gas sealing structure is arranged between the packing gland and the plunger, a valve body central guide is arranged in one end of the valve body, and the plunger moves along the valve body central guide; the valve seat is close to the valve body central guide; a stuffing box is arranged in the other end of the valve body, a guide sleeve and a stuffing group are arranged in the stuffing box, a connected gland hole and a vent are arranged in the packing gland, a first sealing ring, a gas sealing cavity and a second sealing ring are arranged in the gland hole in sequence, the gas sealing cavity and the vent are connected, and the vent and the gas sealing cavity form a gas sealing structure.

[0005] As a further improvement of the present invention, the packing gland is fastened to the valve body by means of studs and nuts.

[0006] As a further improvement of the present invention, the gas sealing chamber is filled with 6 bar nitrogen.

[0007] As a further improvement of the present invention, a water cooling jacket is provided outside the valve body.

[0008] As a further improvement of the present invention, the water cooling jacket is located on the periphery of the packing group.

[0009] As a further improvement of the present invention, a gasket seal is provided between the valve body and the valve seat.

[0010] As a further improvement of the present invention, the valve body and the valve seat are connected and fastened by studs and nuts.

[0011] As a further improvement of the present invention, an anti-loosening washer is provided between the nut and the valve body.

[0012] The positive effects of this application are: 1. The valve seat and the equipment flange of the present invention are welded one-piece flat joint structures, and the plunger is designed with a short stroke to meet the installation requirements in a compact space.

[0013] 2. The central guide design of the valve body of the present invention improves the precision of the plunger's repeated motion and ensures that the valve meets the V-level sealing requirements for a long time.

[0014] 3. The valve body of the present invention is partially provided with a water-cooling jacket, which effectively reduces the temperature of the stuffing box area and the friction of the stuffing, meets the requirements of high temperature up to 600°C and high-frequency switching action (20 times / day); and reduces the adverse effects of heat radiation on the actuator and control accessories.

[0015] 4. The valve body and valve seat of the present invention adopt a split design, are connected and fastened with studs and nuts, and are equipped with anti-loosening washers to prevent loosening, meeting the application requirements of alternating working temperature of 300℃ to 600℃ and preventing the connection threads from loosening.

[0016] 5. The integrated packing gland design of the present invention is provided with a nitrogen sealing protection structure to prevent high-temperature activated carbon powder from leaking out and catching fire, thereby ensuring the safety and reliability of valve operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the present invention.

[0018] Figure 2 It is a cross-sectional view of the valve body of the present invention.

[0019] Figure 3 It is a cross-sectional view of the packing gland of the present invention. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed may also be "included" and "having"; for example, a process, method, system, product or device that may include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.

[0024] like Figure 1 As shown, the present invention is a water-cooled jacketed high-temperature plunger valve including a valve body 1, a valve seat 2 and a packing gland 10 are respectively installed at both ends of the valve body 1, a plunger 7 is slidably arranged among the valve body 1, the valve seat 2 and the packing gland 10, and a gas sealing structure is arranged between the packing gland 10 and the plunger 7.

[0025] A valve body central guide 1.1 is provided in one end of the valve body 1, and the plunger 7 moves along the valve body central guide 1.1. The valve seat 2 is close to the valve body central guide 1.1. A stuffing box 1.2 is provided in the other end of the valve body 1, and a guide sleeve 8 and a stuffing group 9 are provided in the stuffing box 1.2. The valve body 1 central guide 1.1 and the guide sleeve 8 form a double guide structure, which effectively improves the stability of the valve action.

[0026] The packing gland 10 fixes the guide sleeve 8 and the packing group 9 in the packing box 1.2, and the packing gland 10 is fastened to the valve body 1 through the studs 11 and the nuts 12. The packing gland 10 is provided with a gland hole and a vent hole 10.1 that are connected. The gland hole is provided with a first sealing ring, a gas sealing chamber 10.2, and a second sealing ring in sequence. The gas sealing chamber 10.2 and the vent hole 10.1 are connected. The protective gas enters the gas sealing chamber 10.2 through the vent hole 10.1 to prevent the leakage of flammable and explosive gases and high-temperature activated carbon powder from catching fire, thereby ensuring the safety and reliability of the valve operation. The first sealing ring and the second sealing ring seal the gas sealing chamber 10.2. The gas sealing chamber 10.2 and the vent hole 10.1 form a gas sealing structure.

[0027] In this embodiment, the protective gas is nitrogen, and the gas sealing chamber 10.2 is filled with 6 bar nitrogen.

[0028] A water cooling jacket 1.3 is provided outside the valve body 1 and is located outside the packing group 9, which can effectively reduce the temperature of the packing box area and the friction of the packing, meet the requirements of high temperature up to 600°C and high frequency switching action (20 times / day), and reduce the adverse effects of heat radiation on the actuator and control accessories.

[0029] A gasket 3 is provided between the valve body 1 and the valve seat 2 for sealing. The valve body 1 and the valve seat 2 are connected and fastened by studs 3 and nuts 5, and a locking washer 6 is provided between the nut 5 and the valve body 1 to prevent loosening. The valve body 1 and the valve seat 2 are designed in a split type, connected and fastened by studs and nuts, and equipped with locking washers to prevent loosening, meeting the application requirements of alternating working temperature from 300°C to 600°C to prevent the connection thread from loosening.

[0030] The valve seat 2 and the equipment flange are welded one-piece flat joint structures, and the valve is a short-stroke plunger structure to meet the compact space installation requirements.

[0031] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A water-cooled jacketed high-temperature plunger valve, comprising a valve body (1), characterized in that: A valve seat (2) and a packing gland (10) are respectively installed at both ends of the valve body (1); a plunger (7) is slidably arranged in the valve body (1), the valve seat (2) and the packing gland (10); a gas sealing structure is arranged between the packing gland (10) and the plunger (7); a valve body center guide (1.1) is arranged in one end of the valve body (1); the plunger (7) moves along the valve body center guide (1.1); the valve seat (2) is close to the valve body center guide (1.1); the other end of the valve body (1) A stuffing box (1.2) is provided in the part, a guide sleeve (8) and a stuffing group (9) are provided in the stuffing box (1.2), a stuffing gland (10) is provided with a gland hole and a vent hole (10.1) that are connected, a first sealing ring, a gas sealing cavity (10.2) and a second sealing ring are provided in sequence in the gland hole, the gas sealing cavity (10.2) and the vent hole (10.1) are connected, and the vent hole (10.1) and the gas sealing cavity (10.2) form a gas sealing structure.

2. The water-cooled jacketed high-temperature plunger valve according to claim 1, characterized in that: The packing gland (10) is fastened to the valve body (1) by means of studs (11) and nuts (12).

3. The water-cooled jacketed high-temperature plunger valve according to claim 1, characterized in that: The gas sealing chamber (10.2) is filled with 6 bar nitrogen.

4. The water-cooled jacketed high-temperature plunger valve according to claim 1, characterized in that: A water cooling jacket (1.3) is provided outside the valve body (1).

5. The water-cooled jacketed high-temperature plunger valve according to claim 4, characterized in that: The water cooling jacket (1.3) is located on the outer periphery of the packing group (9).

6. The water-cooled jacketed high-temperature plunger valve according to claim 1, characterized in that: A gasket (3) is provided between the valve body (1) and the valve seat (2) for sealing.

7. The water-cooled jacketed high-temperature plunger valve according to claim 1, characterized in that: The valve body (1) and the valve seat (2) are connected and fastened by means of studs (3) and nuts (5).

8. The water-cooled jacketed high-temperature plunger valve according to claim 7, characterized in that: A locking washer (6) is provided between the nut (5) and the valve body (1).

Images