Valve with shaft seal structure

Abstract

The utility model provides a valve with a shaft seal structure. The valve with the shaft seal structure comprises a valve body, a metal pipe is arranged on the valve body, and a valve cover is installed on the metal pipe in a threaded mode. The stuffing box is arranged on the valve body, stuffing is arranged in the stuffing box, a gland is installed on the stuffing box in a threaded mode, a sealing gasket is arranged at the bottom of the gland, and the sealing gasket is located between the stuffing box and the gland; the first waterproof box and the second waterproof box are arranged on the valve body, the top of the first waterproof box and the top of the second waterproof box are each provided with a semicircular groove, and the two semicircular grooves correspond to each other. The valve with the shaft seal structure has the advantages that media are effectively prevented from leaking in the axial direction, stable operation of a system is guaranteed, the fastener can be protected, and the situation that the tightness is affected due to loosening of the fastener is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a valve provided with a shaft sealing structure. Background Art

[0002] In the fluid conveying system, the valve is a key component for controlling the flow of the medium, and its sealing performance is of vital importance. The shaft seal structure is a key component in the valve for preventing the leakage of the medium. It is located at the contact part between the valve stem and the valve body or the valve cover. The main function of the shaft seal structure is to prevent the medium from leaking out of the valve by forming an effective sealing layer between the valve stem and the sealing surface. At the same time, the shaft seal structure can also play a role in lubrication and wear reduction, thereby extending the service life of the valve.

[0003] However, the sealing cover and fasteners of the existing shaft sealing structure are directly exposed to the air. After being exposed to rainwater, the fasteners are prone to rust over time, resulting in loosening and affecting the sealing effect.

[0004] Therefore, it is necessary to provide a new valve with a shaft sealing structure to solve the above technical problems. Utility Model Content

[0005] In order to solve the technical problem that fasteners are prone to rust when in contact with water, resulting in loosening and affecting the sealing effect, the utility model provides a valve with a shaft sealing structure.

[0006] The valve with a shaft sealing structure provided by the utility model comprises: a valve body, a metal tube is provided on the valve body, a valve cover is threadedly installed on the metal tube; a stuffing box, the stuffing box is arranged on the valve body, a stuffing is arranged in the stuffing box, a pressure cover is threadedly installed on the stuffing box, a sealing gasket is provided at the bottom of the pressure cover, and the sealing gasket is located between the stuffing box and the pressure cover; a first waterproof box and a second waterproof box, the first waterproof box and the second waterproof box are both arranged on the valve body, the tops of the first waterproof box and the second waterproof box are both provided with semicircular grooves, the two semicircular grooves are arranged correspondingly, the first waterproof box and the second waterproof box are buckled together, and the first waterproof box and the second waterproof box are used to protect sealing fasteners.

[0007] As a further solution of the utility model, a valve stem is provided on the valve body, the valve stem penetrates the packing and is in close contact with the packing, and a gate is provided at the bottom end of the valve stem, and the gate is used to cut off and regulate the fluid.

[0008] As a further solution of the utility model, a valve stem nut is provided at the top end of the valve stem, and a hand wheel is fixedly mounted on the top end of the valve stem nut, and the hand wheel is used to control the up and down movement of the valve stem.

[0009] As a further solution of the utility model, both sides of the first waterproof box are fixedly installed with card holders, and one side of the two card holders is provided with two card slots.

[0010] As a further solution of the utility model, I-shaped rods are fixedly installed on both sides of the second waterproof box, and two clamping rods are slidably sleeved on the two I-shaped rods, and the two clamping rods are respectively buckled with the two clamping grooves.

[0011] As a further solution of the utility model, a return spring is provided between the two clamping rods, and two ends of the return spring are respectively fixedly connected to the two clamping rods.

[0012] As a further solution of the utility model, the inner walls of the first waterproof box and the second waterproof box are both provided with sealing rings, and the metal pipe, valve cover, stuffing box and gland are all provided with bolts for connection.

[0013] Compared with the related art, the valve provided by the utility model with a shaft sealing structure has the following beneficial effects:

[0014] The utility model provides a valve with a shaft sealing structure:

[0015] Through the elasticity and compressibility of the packing, a tight sealing layer can be formed to effectively prevent leakage of the medium and ensure the sealing performance of the valve. The packing is usually made of wear-resistant materials, which can maintain stable sealing performance and extend the service life of the valve. The packing can be easily taken out and replaced without disassembling the entire valve, reducing maintenance costs and workload. The packing shaft seal is suitable for various media and temperature conditions and can be widely used in various valves. The first waterproof box and the second waterproof box are buckled outside the fasteners to protect the bolt fasteners on the valve cover and the gland to prevent rain from rusting the bolts, thereby causing the fasteners to loosen and affecting the sealing performance;

[0016] The valve can be opened or closed or adjusted by the valve stem. The valve stem is both a moving part, a force-bearing part, and a sealing part during the opening and closing process of the valve. The gate opens or closes the valve by moving upward or downward. The gate is not limited to closing and opening the orifice, but can also provide protection for other gate valve components. The valve stem can be fixed and screwed by the valve stem nut to prevent the valve stem from loosening or rotating during operation, thereby ensuring the stable operation of the valve. Rotating the handwheel can drive the movement of the valve stem, thereby controlling the opening or closing of the valve.

[0017] The card slots on both sides of the first waterproof box can provide installation channels for the buckling of the first waterproof box and the second waterproof box, so that the first waterproof box and the second waterproof box can be fixed conveniently. The first waterproof box and the second waterproof box can be easily separated by pressing through the buckling of the card rod and the card slot, so that the first waterproof box and the second waterproof box can be quickly disassembled. The two card rods can be limited by the return spring to ensure that the card rods are stably buckled in the two card slots, and the two card rods are convenient to slide. The sealing rings on the inner walls of the first waterproof box and the second waterproof box can achieve a tight connection between the first waterproof box and the second waterproof box and the valve to prevent rainwater from flowing in through the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a preferred embodiment of a valve provided with a shaft sealing structure according to the utility model;

[0020] Figure 2 A schematic diagram of a front cross-sectional structure of a preferred embodiment of a valve provided with a shaft sealing structure according to the utility model;

[0021] Figure 3 It is an assembly diagram of the first waterproof box and the second waterproof box in the utility model;

[0022] Figure 4 It is a schematic diagram of the top view of the first waterproof box and the second waterproof box in the utility model;

[0023] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part A.

[0024] In the figure: 1. valve body; 2. metal tube; 3. valve cover; 4. stuffing box; 5. stuffing; 6. pressure cover; 7. sealing gasket; 8. first waterproof box; 9. second waterproof box; 10. valve stem; 11. gate; 12. valve stem nut; 13. hand wheel; 14. holder; 15. slot; 16. I-bar; 17. clamping rod; 18. return spring; 19. sealing ring. DETAILED DESCRIPTION

[0025] Please refer to Figure 1-Figure 5 ,in, Figure 1 A schematic diagram of the three-dimensional structure of a preferred embodiment of a valve provided with a shaft sealing structure according to the utility model; Figure 2 A schematic diagram of a front cross-sectional structure of a preferred embodiment of a valve provided with a shaft sealing structure according to the utility model; Figure 3 It is an assembly diagram of the first waterproof box and the second waterproof box in the utility model; Figure 4It is a schematic diagram of the top view of the first waterproof box and the second waterproof box in the utility model; Figure 5 for Figure 3 The enlarged structural diagram of part A in the figure. The valve with a shaft sealing structure includes: a valve body 1, a metal tube 2 is provided on the valve body 1, and a valve cover 3 is threadedly installed on the metal tube 2; a stuffing box 4, the stuffing box 4 is arranged on the valve body 1, a stuffing 5 is provided in the stuffing box 4, a gland 6 is threadedly installed on the stuffing box 4, a sealing gasket 7 is provided at the bottom of the gland 6, and the sealing gasket 7 is located between the stuffing box 4 and the gland 6; a first waterproof box 8 and a second waterproof box 9, the first waterproof box 8 and the second waterproof box 9 are both arranged on the valve body 1, and the tops of the first waterproof box 8 and the second waterproof box 9 are both provided with semicircular grooves, the two semicircular grooves are arranged correspondingly, the first waterproof box 8 and the second waterproof box 9 are buckled, and the first waterproof box 8 and the second waterproof box 9 are buckled. The box 8 and the second waterproof box 9 are used to protect the sealing fasteners. Through the elasticity and compressibility of the packing 5, a tight sealing layer can be formed to effectively prevent medium leakage and ensure the sealing performance of the valve. The packing 5 is usually made of wear-resistant material and can maintain stable sealing performance to extend the service life of the valve. The packing 5 can be easily taken out and replaced without disassembling the entire valve, reducing maintenance costs and workload. The packing 5 shaft seal is suitable for various media and temperature conditions and can be widely used in various valves. The first waterproof box 8 and the second waterproof box 9 are buckled outside the fasteners to protect the bolt fasteners on the valve cover 3 and the pressure cover 6 to prevent rain from rusting the bolts, thereby causing the fasteners to loosen and affecting the sealing.

[0026] The valve body 1 is provided with a valve stem 10, which passes through the packing 5 and is in close contact with the packing 5. The bottom end of the valve stem 10 is provided with a gate plate 11, which is used to cut off and regulate the fluid. The valve can be switched or regulated by the valve stem 10. The valve stem 10 is both a moving part, a force-bearing part and a sealing part during the opening and closing process of the valve. The gate plate 11 opens or closes the valve by moving upward or downward. The gate plate 11 is not limited to closing and opening the orifice, but can also provide protection for other gate valve components.

[0027] A stem nut 12 is provided at the top of the valve stem 10, and a handwheel 13 is fixedly installed at the top of the stem nut 12. The handwheel 13 is used to control the up and down movement of the valve stem 10. The stem nut 12 can fix and screw the valve stem 10 to prevent the valve stem 10 from loosening or rotating during operation, thereby ensuring the stable operation of the valve. Rotating the handwheel 13 can drive the movement of the valve stem 10, thereby controlling the opening or closing of the valve.

[0028] The first waterproof box 8 is fixedly provided with a holder 14 on both sides, and two slots 15 are provided on one side of the two holders 14. The slots 15 on both sides of the first waterproof box 8 can provide an installation channel for the first waterproof box 8 and the second waterproof box 9 to be buckled together, so as to facilitate fixing the first waterproof box 8 and the second waterproof box 9.

[0029] An I-shaped rod 16 is fixedly installed on both sides of the second waterproof box 9, and two clamping rods 17 are slidably sleeved on the two I-shaped rods 16. The two clamping rods 17 are respectively engaged with the two clamping grooves 15. Through the engagement of the clamping rods 17 and the clamping grooves 15, the first waterproof box 8 and the second waterproof box 9 can be easily separated by pressing, thereby realizing the quick disassembly of the first waterproof box 8 and the second waterproof box 9.

[0030] A return spring 18 is provided between the two card rods 17, and the two ends of the return spring 18 are fixedly connected to the two card rods 17 respectively. The two card rods 17 can be limited by the return spring 18 to ensure that the card rods 17 are stably buckled in the two card slots 15, and at the same time, the two card rods 17 are convenient for sliding.

[0031] The inner walls of the first waterproof box 8 and the second waterproof box 9 are both provided with sealing rings 19, and the metal tube 2, the valve cover 3, the stuffing box 4 and the pressure cover 6 are all provided with bolts for connection. Through the sealing rings 19 on the inner walls of the first waterproof box 8 and the second waterproof box 9, a tight connection between the first waterproof box 8 and the second waterproof box 9 and the valve can be achieved to prevent rainwater from flowing in through the gaps.

[0032] The working principle of the valve provided with a shaft seal structure provided by the utility model is as follows:

[0033] When in use, the packing 5 is filled in the stuffing box 4, and a certain pressure is applied to the packing 5 through the gland 6 to make it fit closely with the valve stem 10 to form an effective seal. When the valve stem 10 moves up and down during the opening and closing of the valve, the packing 5 will be deformed accordingly, but always maintains close contact with the valve stem 10. When the valve stem 10 is in the valve closed state, the packing 5 is pressed between the valve stem 10 and the valve body 1 to form a tight sealing layer, which can effectively prevent the medium from leaking from the gap. At the same time, the elasticity and compressibility of the packing 5 also allow the valve stem 10 to have a certain movement space during the opening and closing process, thereby avoiding excessive wear between the valve stem 10 and the packing 5;

[0034] When it is necessary to disassemble the first waterproof box 8 and the second waterproof box 9, the two clamping rods 17 are pressed inward, the return springs 18 are compressed, and the two clamping rods 17 can be disengaged from the two clamping slots 15, so that the first waterproof box 8 and the second waterproof box 9 that are buckled together can be separated. When it is necessary to install the first waterproof box 8 and the second waterproof box 9, the two clamping rods 17 are pressed, and the two clamping rods 17 are aligned with the two clamping slots 15 and put into the clamping slots 15, and the clamping rods 17 are released, and the return springs 18 automatically return to their original position to firmly clamp the two clamping rods 17 in the two clamping slots 15.

[0035] Compared with the related art, the valve provided by the utility model with a shaft sealing structure has the following beneficial effects:

[0036] The utility model provides a valve with a shaft sealing structure, which can form a tight sealing layer through the elasticity and compressibility of the packing 5, effectively prevent the leakage of the medium, and ensure the sealing performance of the valve. The packing 5 is usually made of wear-resistant material, which can maintain a stable sealing performance and extend the service life of the valve. The packing 5 can be easily taken out and replaced without disassembling the entire valve, thereby reducing maintenance costs and workload. The packing 5 shaft seal is suitable for various media and temperature conditions and can be widely used in various valves. The first waterproof box 8 and the second waterproof box 9 are buckled outside the fasteners to protect the bolt fasteners on the valve cover 3 and the pressure cover 6 to prevent rain from rusting the bolts, thereby causing the fasteners to loosen and affect the sealing performance. The valve can be switched on and off or adjusted by the valve stem 10. The valve stem 10 is both a moving part, a force-bearing part, and a sealing part during the opening and closing process of the valve. The gate 11 opens or closes the valve by moving upward or downward. The gate 11 is not limited to closing and opening the orifice, but can also be used for other gate valves. The valve stem 10 can be fixed and screwed by the valve stem nut 12 to prevent the valve stem 10 from loosening or rotating during operation, thereby ensuring the stable operation of the valve. The rotating hand wheel 13 can drive the movement of the valve stem 10 to control the opening or closing of the valve. The card slots 15 on both sides of the first waterproof box 8 can provide installation channels for the buckling of the first waterproof box 8 and the second waterproof box 9, which is convenient for fixing the first waterproof box 8 and the second waterproof box 9. The card rod 17 and the card slot 15 are buckled together, and the first waterproof box 8 and the second waterproof box 9 can be easily separated by pressing, so as to realize the quick disassembly of the first waterproof box 8 and the second waterproof box 9. The two card rods 17 can be limited by the return spring 18 to ensure that the card rods 17 are stably buckled in the two card slots 15, and at the same time, it is convenient for the two card rods 17 to slide. The sealing rings 19 on the inner walls of the first waterproof box 8 and the second waterproof box 9 can realize the close connection between the first waterproof box 8 and the second waterproof box 9 and the valve to prevent rainwater from flowing in through the gap.

[0037] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0038] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0039] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A valve with a shaft sealing structure, characterized in that: include: A valve body, wherein a metal tube is provided on the valve body, and a valve cover is threadedly mounted on the metal tube; A stuffing box, the stuffing box is arranged on the valve body, a stuffing is arranged in the stuffing box, a gland is threadedly mounted on the stuffing box, a sealing gasket is arranged at the bottom of the gland, and the sealing gasket is located between the stuffing box and the gland; A first waterproof box and a second waterproof box, wherein the first waterproof box and the second waterproof box are both arranged on the valve body, and the tops of the first waterproof box and the second waterproof box are both provided with semicircular grooves, and the two semicircular grooves are arranged correspondingly, and the first waterproof box and the second waterproof box are buckled together, and the first waterproof box and the second waterproof box are used to protect the sealing fasteners.

2. The valve with a shaft sealing structure according to claim 1, characterized in that: The valve body is provided with a valve stem, which penetrates through the packing and is in close contact with the packing. The bottom end of the valve stem is provided with a gate plate, which is used to cut off and regulate the fluid.

3. The valve with a shaft sealing structure according to claim 2, characterized in that: A valve stem nut is provided at the top end of the valve stem, and a hand wheel is fixedly mounted on the top end of the valve stem nut. The hand wheel is used to control the up and down movement of the valve stem.

4. The valve with a shaft sealing structure according to claim 1, characterized in that: A card holder is fixedly installed on both sides of the first waterproof box, and two card slots are provided on one side of the two card holders.

5. The valve with a shaft sealing structure according to claim 4, characterized in that: I-shaped rods are fixedly installed on both sides of the second waterproof box, and two clamping rods are slidably sleeved on the two I-shaped rods, and the two clamping rods are respectively buckled with the two clamping grooves.

6. The valve with a shaft sealing structure according to claim 5, characterized in that: A return spring is arranged between the two clamping rods, and two ends of the return spring are respectively fixedly connected to the two clamping rods.

7. The valve with a shaft sealing structure according to claim 1, characterized in that: The inner walls of the first waterproof box and the second waterproof box are both provided with sealing rings, and the metal pipe, the valve cover, the stuffing box and the gland are all provided with bolts for connection.

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