Knife Gate Valve

Abstract

The present application discloses a knife gate valve, including a valve body, a valve seat is arranged on the valve body, a retaining ring is arranged on the valve body, the retaining ring is closely attached to the valve seat, a gate plate is slidably arranged on the valve body, a packing is arranged in the valve body, and packing is arranged on both sides of the gate plate, a scraper is arranged in the valve body, and the scraper is arranged on both sides of the gate plate, the scraper is used to contact the gate plate, a guide wedge is arranged in the valve body, the guide wedge contacts the gate plate, and a screw is connected to one end of the gate plate. This knife gate valve has the following beneficial effects: by arranging scrapers on both sides of the gate plate, scraping and grinding the gate plate with the scrapers, materials adhering to the gate plate are avoided, and effective cleaning of the gate plate is achieved.

Description

Technical Field

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

[0002] Knife gate valve is a commonly used valve at present. The current knife gate valve structure is disclosed in the patent announcement document CN218267309U. The gate plate (numbered 13 in the document) of this knife gate valve is provided with push rods (numbered 81 in the document) on both sides. The push rods are installed with springs (numbered 82 in the document). The elasticity of the spring is used to make the push rod elastically press against the gate plate. The push rod is close to the gate plate to ensure that the gate plate remains stable when it is extended and retracted. However, when this gate valve is used as a slurry (especially viscous slurry) conveying pipeline, since the push rod is retractable, the push rod cannot scrape off the particles attached to the gate plate (precipitated and solidified from the slurry). Utility Model Content

[0003] In view of the above problems, the utility model proposes a knife gate valve. Scrapers are fixedly arranged on both sides of a gate plate of the knife gate valve, and particles attached to the gate plate are scraped off by the scrapers.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A knife gate valve comprises a valve body, a valve seat is arranged on the valve body, a retaining ring is arranged on the valve body, the retaining ring is closely attached to the valve seat, a gate plate is slidably arranged on the valve body, a packing is arranged in the valve body, and packing is arranged on both sides of the gate plate, a scraper is arranged in the valve body, and the scraper is arranged on both sides of the gate plate, the scraper is used to contact the gate plate, a guide wedge is arranged in the valve body, the guide wedge is in contact with the gate plate, and a screw is connected to one end of the gate plate.

[0006] In this type of knife gate valve, the scrapers on both sides of the gate are directly fixed on the valve body. The scrapers on both sides of the gate are used to scrape off particles on the gate, thereby cleaning the gate.

[0007] Similarly, in this type of knife gate valve, a guide wedge is provided on the valve body, and the guide wedge is utilized to contact the gate plate, so that the guide wedge guides the sliding of the gate plate in the valve body, thereby ensuring that the gate plate can slide stably in the valve body.

[0008] Similarly, in this type of knife gate valve, the packing on both sides of the gate is used to seal between the gate and the valve body, and secondly, to guide the sliding of the gate.

[0009] In summary, in this knife gate valve, scrapers are arranged on both sides of the gate plate, and the gate plate is scraped and ground by the scrapers to avoid material sticking on the gate plate, thereby achieving effective cleaning of the gate plate.

[0010] Optionally, it also includes a top plate, a side plate and a mounting nut assembly, wherein the side plates have multiple pieces, one end of the side plate is matched with the valve body through the mounting nut assembly, and the other end of the side plate is matched with the top plate through the mounting nut assembly, the side plate and the valve body enclose a protective cavity, a part of the screw is located in the protective cavity, a top nut is provided on the top plate, and the top nut is matched with the screw.

[0011] The specific function of the protective cavity is to protect the screw, and the top nut on the top plate can be made of copper.

[0012] In order to ensure that the side panel is installed stably and firmly, the mounting nut assembly is made of nylon.

[0013] Optionally, an oil filling hole is provided on the side plate.

[0014] The purpose of setting the oil injection hole is to facilitate the injection of grease into the top nut or the screw when needed, thereby achieving lubrication.

[0015] Optionally, the oil filling hole includes a first oil filling hole, a second oil filling hole and a third oil filling hole, and the first oil filling hole, the second oil filling hole and the third oil filling hole are respectively located at different positions of the side plate.

[0016] Optionally, a handwheel is further included, and the handwheel is arranged at one end of the screw rod.

[0017] The purpose of setting the handwheel is to facilitate the turning of the screw. The handwheel is installed at one end of the screw through a set screw. The gate and the handwheel are located at both ends of the screw respectively, and the top plate is located between the handwheel and the valve body.

[0018] Optionally, a pressure cover is also included, which is arranged at one end of the valve body and is used to compress the packing.

[0019] The packing is used to press the packing into the valve body to prevent the packing from falling out of the valve body.

[0020] Optionally, a first mounting groove and a second mounting groove are provided on the valve body, the valve seat is arranged in the first mounting groove, and the retaining ring is arranged in the second mounting groove.

[0021] Optionally, a connecting nut assembly is also included, and the screw rod and the gate plate are matched together through the connecting nut assembly.

[0022] The connecting nut assembly between the screw rod and the gate plate is matched together. In order to ensure a firm connection between the screw rod and the gate plate, the connecting nut assembly is made of nylon.

[0023] The utility model has the beneficial effects that: in the knife gate valve, scrapers are arranged on both sides of the gate plate, the gate plate is scraped and grinded by the scrapers, so that materials are prevented from sticking on the gate plate, thereby achieving effective cleaning of the gate plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the knife gate valve structure;

[0025] Figure 2 It is a schematic diagram showing the matching relationship between the screw and the gate;

[0026] Figure 3 It is a schematic diagram of the internal structure of the valve body;

[0027] Figure 4 It is a schematic diagram of the structure of the side panel.

[0028] The reference numerals in the figure are: 1, valve body; 101, guide wedge; 102, first mounting groove; 103, second mounting groove; 2, valve seat; 3, retaining ring; 4, gate; 5, scraper; 6, packing; 7, gland; 8, side plate; 801, first oil filling hole; 802, second oil filling hole; 803, third oil filling hole; 9, screw; 10, top nut; 11, top plate; 12, set screw; 13, handwheel; 14, thrust bearing; 15, mounting nut assembly; 16, connecting nut assembly. DETAILED DESCRIPTION

[0029] The utility model is described in detail below in conjunction with the accompanying drawings.

[0030] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a knife gate valve comprises a valve body 1, a valve seat 2 is arranged on the valve body 1, a retaining ring 3 is arranged on the valve body 1, the retaining ring 3 is closely attached to the valve seat 2, a gate plate 4 is slidably arranged on the valve body 1, a packing 6 is arranged in the valve body 1, and packing 6 is arranged on both sides of the gate plate 4, a scraper 5 is arranged in the valve body 1, and scrapers 5 are arranged on both sides of the gate plate 4, the scraper 5 is used to contact with the gate plate 4, a guide wedge 101 is arranged in the valve body 1, the guide wedge 101 is in contact with the gate plate 4, and a screw 9 is connected to one end of the gate plate 4.

[0031] In this knife gate valve, the scrapers 5 on both sides of the gate plate 4 are directly fixed on the valve body 1 , and the scrapers 5 on both sides of the gate plate 4 are used to scrape off particles on the gate plate 4 , thereby cleaning the gate plate 4 .

[0032] Similarly, in this knife gate valve, a guide wedge 101 is provided on the valve body 1. The guide wedge 101 contacts the gate plate 4 and guides the sliding of the gate plate 4 in the valve body 1, thereby ensuring that the gate plate 4 can slide stably in the valve body 1.

[0033] Similarly, in this knife gate valve, the packings 6 on both sides of the gate plate 4 are used to seal between the gate plate 4 and the valve body 1 and to guide the sliding of the gate plate 4.

[0034] In summary, in this knife gate valve, by arranging the scrapers 5 on both sides of the gate plate 4, the scrapers 5 are used to scrape the gate plate 4 to avoid the material sticking to the gate plate 4, thereby achieving effective cleaning of the gate plate 4.

[0035] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, it also includes a top plate 11, a side plate 8 and a mounting nut assembly 15. The side plates 8 have multiple pieces. One end of the side plate 8 is matched with the valve body 1 through the mounting nut assembly 15, and the other end of the side plate 8 is matched with the top plate 11 through the mounting nut assembly 15. The side plates 8 and the valve body 1 enclose a protective cavity, and a part of the screw 9 is located in the protective cavity. A top nut 10 is arranged on the top plate 11, and the top nut 10 is matched with the screw 9.

[0036] The specific function of the protection cavity is to protect the screw rod 9, and the top nut 10 on the top plate 11 can be made of copper.

[0037] In order to ensure that the side panel 8 is installed stably and firmly, the mounting nut assembly 15 is made of nylon.

[0038] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, an oil filling hole is provided on the side plate 8.

[0039] The purpose of providing the oil injection hole is to facilitate the injection of grease into the top nut 10 or the screw rod 9 when necessary, thereby achieving lubrication.

[0040] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, the oil filling holes include a first oil filling hole 801 , a second oil filling hole 802 and a third oil filling hole 803 , and the first oil filling hole 801 , the second oil filling hole 802 and the third oil filling hole 803 are respectively located at different positions of the side plate 8 .

[0041] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a hand wheel 13 is also included, and the hand wheel 13 is arranged at one end of the screw rod 9.

[0042] The handwheel 13 is provided to facilitate the turning of the screw 9. Specifically, the handwheel 13 is installed at one end of the screw 9 through a set screw 12. The gate plate 4 and the handwheel 13 are respectively located at the two ends of the screw 9. The top plate 11 is located between the handwheel 13 and the valve body 1. In order to reduce the friction between the handwheel 13 and the top plate 11, a thrust bearing 14 is provided on the top plate 11.

[0043] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, it also includes a gland 7, which is arranged at one end of the valve body 1 and is used to compress the packing 6.

[0044] The packing 6 is used to press the packing 6 into the valve body 1 to prevent the packing 6 from falling out of the valve body 1 .

[0045] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown in FIG. 1 , a first mounting groove 102 and a second mounting groove 103 are formed on the valve body 1, the valve seat 2 is arranged in the first mounting groove 102, and the retaining ring 3 is arranged in the second mounting groove 103. Figure 2 And attached Figure 3 As shown in the figure, the bottom of the cavity on the left side of the valve body 1 does not have any groove, which can reduce the accumulation of medium in the valve.

[0046] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a connecting nut assembly 16 is also included, and the screw rod 9 and the gate plate 4 are matched together through the connecting nut assembly 16.

[0047] The screw rod 9 and the gate plate 4 are connected with a nut assembly 16 . To ensure a firm connection between the screw rod 9 and the gate plate 4 , the nut assembly 16 is made of nylon.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A knife gate valve, comprising a valve body, a valve seat being arranged on the valve body, a retaining ring being arranged on the valve body, the retaining ring being closely attached to the valve seat, and a gate being slidably arranged on the valve body, characterized in that: A packing is arranged in the valve body, and packing is arranged on both sides of the gate plate. A scraper is arranged in the valve body, and the scraper is arranged on both sides of the gate plate. The scraper is used to contact the gate plate. A guide wedge is arranged in the valve body, and the guide wedge is in contact with the gate plate. A screw is connected to one end of the gate plate.

2. The knife gate valve according to claim 1, characterized in that: It also includes a top plate, a side plate and a mounting nut assembly. The side plates have multiple parts. One end of the side plate is matched with the valve body through the mounting nut assembly, and the other end of the side plate is matched with the top plate through the mounting nut assembly. The side plate and the valve body enclose a protective cavity, a part of the screw is located in the protective cavity, and a top nut is arranged on the top plate, and the top nut is matched with the screw.

3. The knife gate valve according to claim 2, characterized in that: An oil filling hole is provided on the side plate.

4. The knife gate valve according to claim 3, characterized in that: The oil filling hole comprises a first oil filling hole, a second oil filling hole and a third oil filling hole, and the first oil filling hole, the second oil filling hole and the third oil filling hole are respectively located at different positions of the side plate.

5. The knife gate valve according to claim 1, characterized in that: The utility model also comprises a hand wheel, wherein the hand wheel is arranged at one end of the screw rod.

6. The knife gate valve according to claim 1, characterized in that: It also includes a gland, which is arranged at one end of the valve body and is used to compress the packing.

7. The knife gate valve according to claim 1, characterized in that: The valve body is provided with a first mounting groove and a second mounting groove, the valve seat is arranged in the first mounting groove, and the retaining ring is arranged in the second mounting groove.

8. The knife gate valve according to claim 1, characterized in that: It also includes a connecting nut assembly, through which the screw rod and the gate plate are matched together.

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