Dustproof gate valve

Abstract

The utility model discloses a dustproof gate valve which comprises a valve body, a valve cover and a valve rod, the upper end of the valve cover is fixedly connected with a protection mechanism, the upper end of the protection mechanism is provided with a dustproof mechanism, and the upper end of the dustproof mechanism is provided with a first bolt; the dustproof mechanism comprises two first sealing shells and two second connecting plates, the two first sealing shells are located at the upper end of the protection mechanism, the two second connecting plates are symmetrically and fixedly connected to the outer side ends of the first sealing shells, and rotating grooves are formed in the middles of the inner walls of the two first sealing shells; the outer side end of the valve rod is fixedly connected with a circular rotating plate, and circular sealing grooves are formed in the middle of the upper end and the middle of the lower end of the rotating groove correspondingly. The protective cover is matched with the first sealing shell to play a sealing role, external dust is prevented from entering the gate valve, meanwhile, the valve rod is wrapped by the sponge block, and the dustproof effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a dustproof gate valve. Background Art

[0002] The gate valve is a gate plate of an opening and closing part. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate has a rigid gate plate and an elastic gate plate. According to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve.

[0003] Gate valves have a wide range of applications, but in petroleum, petrochemical, oxygen pipelines and in the transportation of flammable, explosive and clean media, higher requirements are placed on gate valves. It is necessary to prevent external dust or other particulate matter from entering the packing and the inner cavity of the gate valve to avoid affecting the sealing performance of the gate valve or contaminating the medium in the pipe, thereby creating an explosion risk. Currently, most dust-proof gate valves on the market use a cover sleeve on the valve stem. In order to prevent dust, a glass panel is installed on the cover by bolts. The glass panel is easily damaged during transportation, and the cover and the valve stem of the gate valve are only connected by a dust sleeve, which has limited protection against dust. Utility Model Content

[0004] The utility model aims to provide a dustproof gate valve, which can seal the gate valve to prevent dust and adopt multi-layer sealing to improve the sealing effect.

[0005] In order to achieve the above-mentioned purpose, a dustproof gate valve is provided, comprising: a valve body, a valve cover and a valve stem, the valve cover is arranged at the upper end of the valve body, the valve stem is arranged at the upper end of the valve cover, the upper end of the valve cover is fixedly connected with a protective mechanism, the upper end of the protective mechanism is provided with a dustproof mechanism, and the upper end of the valve stem sequentially penetrates the protective mechanism and the dustproof mechanism, the upper end of the dustproof mechanism is installed with a first bolt, and the protective mechanism and the dustproof mechanism are fixedly connected by the first bolt; the dustproof mechanism comprises a first sealing shell and a second connecting plate, the first sealing shell is provided with two and is located at the upper end of the protective mechanism, and the two first sealing shells The valve stem is located in the middle of the two first sealing shells, the second connecting plate is provided with two and symmetrically fixedly connected to the outer end of the first sealing shell, and the second connecting plate is located at the bottom of the first sealing shell, the first bolt passes through the second connecting plate, and a rotation groove is opened in the middle of the inner wall of the two first sealing shells, a circular rotating plate is welded on the outer end of the valve stem, and the valve stem passes through the middle of the rotating plate, the rotating plate is located in the rotating groove and is rotatably connected to the rotating groove, and an annular sealing groove is opened in the middle of the upper end and the lower end of the rotating groove, and the sealing groove is filled with sealing filler. The gate valve can be sealed and dustproof, and multi-layer sealing is adopted to improve the sealing effect.

[0006] According to the dustproof gate valve, the protection mechanism includes a first connecting plate and a protective cover, the protective cover is fixedly connected to the middle of the upper end of the valve cover, and the valve stem is located in the middle of the protective cover, two first connecting plates are provided, and the two first connecting plates are symmetrically fixedly connected to the outer ends of the protective cover and located at the upper end of the protective cover, a connecting screw hole is opened in the first connecting plate, and the first thread penetrates the connecting screw hole and is threadedly connected to the connecting screw hole. The valve stem is wrapped with the dustproof mechanism to prevent dust from entering the gate valve.

[0007] According to the dustproof gate valve, the protective cover is fixedly connected to the valve cover by welding, thereby ensuring the sealing effect on the gate valve stem and improving the structural strength of the gate valve.

[0008] According to the dustproof gate valve, the upper ends of the protective cover and the second connecting plate are provided with sealing pads, so that the protective cover and the second connecting plate are tightly connected to ensure sealing.

[0009] According to the dustproof gate valve, the inner diameter of the protective cover is larger than the diameter of the valve stem, thereby reducing the contact surface with the valve stem, lowering the friction force of contact with the valve stem, and facilitating the rotation of the valve stem.

[0010] According to the dustproof gate valve, the upper ends of the two first sealing shells are fixedly connected with a semicircular second sealing shell, and the second sealing shell is located at the opposite end of the first sealing shell, the second sealing shell is provided with a chamber inside, and the chambers of the two second sealing shells are connected, a sponge block is installed in the second sealing shell, and the valve stem passes through the second sealing shell and the sponge block, and the outer end of the valve stem is rotatably connected with the second sealing shell and the sponge block respectively. Wrapping the valve stem reduces the gap in contact with the valve stem, and further improves the dustproof effect.

[0011] According to the dustproof gate valve, two third connection plates are symmetrically fixedly connected to the outer ends of the two first sealed shells, and the third connection plates of the two first sealed shells are opposite to each other, and the side ends of the third connection plates are installed with second bolts, and the second bolts penetrate the third connection plates and are threadedly connected to the third connection plates, so as to improve the connection strength of the two first sealed shells and avoid the occurrence of gaps between the first sealed shells, which affects the dustproof effect.

[0012] According to the dustproof gate valve, the opposite ends of the two first sealing shells are provided with sealing rubber rings, and the two first sealing shells seal the two ends of the rubber rings respectively, so as to reduce the gap between the first sealing shells and improve the dustproof effect.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Prevent dust from entering the gate valve through the cooperation between the rotating plate and the rotating groove, and use the sealing filler filled in the sealing groove to reduce the gap between the rotating plate and the rotating groove to block the dust. Through different dust-proof measures, the dust-proof effect is improved.

[0015] 2. Use sponge blocks to wrap the valve stem to block dust and further improve the dust-proof effect of the gate valve.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional diagram of a dustproof gate valve of the utility model;

[0019] Figure 2 This is a cross-sectional view of a dustproof gate valve of the utility model;

[0020] Figure 3 This is a three-dimensional diagram of a protective mechanism of a dustproof gate valve of the utility model;

[0021] Figure 4 It is a cross-sectional view of a dustproof mechanism of a dustproof gate valve of the utility model.

[0022] In the figure: 1. dustproof mechanism; 2. valve cover; 3. valve body; 4. protection mechanism; 5. first bolt; 6. rotating plate; 7. valve stem; 8. first connecting plate; 9. protective cover; 10. connecting screw hole; 11. sponge block; 12. first sealing shell; 13. sealing groove; 14. rotating groove; 15. second connecting plate; 16. second sealing shell; 17. second bolt; 18. third connecting plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4The utility model provides a technical solution: a dustproof gate valve, comprising: a valve body 3, a valve cover 2 and a valve stem 7, the valve cover 2 is arranged at the upper end of the valve body 3, the valve stem 7 is arranged at the upper end of the valve cover 2, the upper end of the valve cover 2 is fixedly connected with a protective mechanism 4, the upper end of the protective mechanism 4 is provided with a dustproof mechanism 1, and the upper end of the valve stem 7 sequentially penetrates the protective mechanism 4 and the dustproof mechanism 1, the upper end of the dustproof mechanism 1 is installed with a first bolt 5, and the protective mechanism 4 and the dustproof mechanism 1 are fixedly connected by the first bolt 5; the dustproof mechanism 1 comprises a first sealing shell 12 and a second connecting plate 15, the first sealing shell 12 is provided with two and is located at the upper end of the protective mechanism 4, and the two first sealing shells 1 2 forms a complete circle, the valve stem 7 is located in the middle of the two first sealing shells 12, two second connecting plates 15 are provided and symmetrically fixedly connected to the outer ends of the first sealing shells 12, and the second connecting plates 15 are located at the bottom of the first sealing shell 12, the first bolt 5 passes through the second connecting plate 15, and a rotating groove 14 is opened in the middle of the inner walls of the two first sealing shells 12, a circular rotating plate 6 is welded to the outer end of the valve stem 7, and the valve stem 7 passes through the middle of the rotating plate 6, the rotating plate 6 is located in the rotating groove 14 and is rotatably connected to the rotating groove 14, and an annular sealing groove 13 is opened in the middle of the upper end and the lower end of the rotating groove 14, and the sealing groove 13 is filled with sealing filler.

[0025] The protection mechanism 4 includes a first connecting plate 8 and a protective cover 9. The protective cover 9 is fixedly connected to the middle part of the upper end of the valve cover 2, and the valve stem 7 is located in the middle part of the protective cover 9. Two first connecting plates 8 are provided, and the two first connecting plates 8 are symmetrically fixedly connected to the outer ends of the protective cover 9 and are located at the upper end of the protective cover 9. A connecting screw hole 10 is opened in the first connecting plate 8, and the first thread passes through the connecting screw hole 10 and is threadedly connected to the connecting screw hole 10.

[0026] The protective cover 9 is fixedly connected to the valve cover 2 by welding.

[0027] The upper ends of the protective cover 9 and the second connecting plate 15 are provided with sealing gaskets.

[0028] The inner diameter of the protective cover 9 is larger than the diameter of the valve stem 7 .

[0029] A semicircular second sealing shell 16 is fixedly connected to the upper ends of the two first sealing shells 12, and the second sealing shell 16 is located at the opposite end of the first sealing shell 12. A chamber is provided inside the second sealing shell 16, and the chambers of the two second sealing shells 16 are connected. A sponge block 11 is installed in the second sealing shell 16, and the valve stem 7 passes through the second sealing shell 16 and the sponge block 11, and the outer ends of the valve stem 7 are rotatably connected to the second sealing shell 16 and the sponge block 11 respectively.

[0030] Two third connecting plates 18 are symmetrically fixedly connected to the outer ends of the two first sealed shells 12, and the third connecting plates 18 of the two first sealed shells 12 are opposite to each other. Second bolts 17 are installed on the side ends of the third connecting plates 18, and the second bolts 17 pass through the third connecting plates 18 and are threadedly connected to the third connecting plates 18.

[0031] Sealing rubber rings are disposed at opposite ends of the two first sealing shells 12 , and the two first sealing shells 12 seal the two ends of the rubber rings respectively.

[0032] Working principle: When in use, first fill the sealing groove 13 with sealing filler, install the sponge block 11 in the second sealing shell 16, and then install the dustproof mechanism 1 on the protective mechanism 4 through the first bolt 5, and at the same time, the rotating plate 6 extends into the rotating groove 14, and then use the second bolt 17 to fix the third connecting plate 18 of the two first sealing shells 12. The contact between the sponge block 11 and the valve stem 7, the cooperation between the rotating plate 6 and the rotating groove 14, and the cooperation between the sealing filler in the sealing groove 13 and the rotating plate 6 can prevent dust from entering the gate valve.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A dustproof gate valve, comprising: A valve body (3), a valve cover (2) and a valve stem (7), characterized in that the valve cover (2) is arranged at the upper end of the valve body (3), the valve stem (7) is arranged at the upper end of the valve cover (2), the upper end of the valve cover (2) is fixedly connected with a protective mechanism (4), the upper end of the protective mechanism (4) is provided with a dustproof mechanism (1), and the upper end of the valve stem (7) passes through the protective mechanism (4) and the dustproof mechanism (1) in sequence, the upper end of the dustproof mechanism (1) is installed with a first bolt (5), and the protective mechanism (4) and the dustproof mechanism (1) are fixedly connected by the first bolt (5); the dustproof mechanism (1) includes a first sealing shell (12) and a second connecting plate (15), the first sealing shell (12) is provided with two and is located at the upper end of the protective mechanism (4), and the two first sealing shells (12) form a complete The valve stem (7) is located in the middle of the two first sealing shells (12), two second connecting plates (15) are provided and are symmetrically fixedly connected to the outer ends of the first sealing shells (12), and the second connecting plate (15) is located at the bottom of the first sealing shell (12), the first bolt (5) passes through the second connecting plate (15), and a rotating groove (14) is opened in the middle of the inner walls of the two first sealing shells (12), a circular rotating plate (6) is welded to the outer end of the valve stem (7), and the valve stem (7) passes through the middle of the rotating plate (6), the rotating plate (6) is located in the rotating groove (14) and is rotatably connected to the rotating groove (14), and an annular sealing groove (13) is opened in the middle of the upper end and the lower end of the rotating groove (14), and the sealing groove (13) is filled with sealing filler.

2. A dustproof gate valve according to claim 1, characterized in that: The protection mechanism (4) comprises a first connecting plate (8) and a protection cover (9), wherein the protection cover (9) is fixedly connected to the middle part of the upper end of the valve cover (2), and the valve stem (7) is located in the middle part of the protection cover (9), two first connecting plates (8) are provided, and the two first connecting plates (8) are symmetrically fixedly connected to the outer ends of the protection cover (9) and are located at the upper end of the protection cover (9), a connecting screw hole (10) is opened in the first connecting plate (8), and a first thread passes through the connecting screw hole (10) and is threadedly connected to the connecting screw hole (10).

3. A dustproof gate valve according to claim 2, characterized in that: The protective cover (9) and the valve cover (2) are fixedly connected by welding.

4. A dustproof gate valve according to claim 2, characterized in that: Sealing pads are provided at the upper ends of the protective cover (9) and the second connecting plate (15).

5. A dustproof gate valve according to claim 2, characterized in that: The inner diameter of the protective cover (9) is greater than the diameter of the valve stem (7).

6. A dustproof gate valve according to claim 1, characterized in that: A semicircular second sealing shell (16) is fixedly connected to the upper ends of the two first sealing shells (12), and the second sealing shell (16) is located at the opposite end of the first sealing shell (12). A chamber is provided inside the second sealing shell (16), and the chambers of the two second sealing shells (16) are connected. A sponge block (11) is installed in the second sealing shell (16), and the valve stem (7) passes through the second sealing shell (16) and the sponge block (11), and the outer ends of the valve stem (7) are rotatably connected to the second sealing shell (16) and the sponge block (11) respectively.

7. A dustproof gate valve according to claim 1, characterized in that: Two third connecting plates (18) are symmetrically fixedly connected to the outer ends of the two first sealing shells (12), and the third connecting plates (18) of the two first sealing shells (12) are opposite to each other. Second bolts (17) are installed on the side ends of the third connecting plates (18), and the second bolts (17) pass through the third connecting plates (18) and are threadedly connected to the third connecting plates (18).

8. The dustproof gate valve according to claim 1, characterized in that: Sealing rubber rings are provided at opposite ends of the two first sealing shells (12), and the two first sealing shells (12) seal the two ends of the rubber rings respectively.

Images