Fully-closed gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a fully-sealed gate valve which comprises a gate valve body, a sealing mechanism is arranged at the top end of the gate valve body and penetrates into the gate valve body, the sealing mechanism comprises a supporting rod, and the outer wall of the sealing mechanism is connected with a limiting mechanism in a sliding mode. And the limiting mechanism comprises connecting plates, the connecting plates are connected to the two sides of the outer wall of the supporting rod in a sliding mode and connected to the inner wall of the supporting rod in a sliding mode, and spherical sliding blocks are arranged at the attaching positions of the connecting plates and the inner wall of the supporting rod. The internal parts of the sealing mechanism are matched with one another, so that the channel on the inner wall of the gate valve main body can be sealed, and the internal parts of the limiting mechanism are matched with one another, so that the gate valve plate and the inner wall of the gate valve main body can be limited, and the influence of rotation of the threaded rod caused by vibration on the limiting sliding sleeve is reduced; therefore, the sealing performance of the gate valve body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gate valve, concretely relates to a full closed gate valve. BACKGROUND

[0002] The gate valve is a gate board of an opening and closing part, the movement direction of the gate board is perpendicular to the fluid direction, the gate valve can only be fully opened and closed, and cannot be adjusted and throttled. The gate valve is sealed through the contact between the valve seat and the gate board, and the sealing surface is usually built up with a metal material to increase the wear resistance, for example, 1Cr13, STL6, stainless steel and the like. The gate board has a rigid gate board and an elastic gate board, according to the difference of the gate board, the gate valve is divided into a rigid gate valve and an elastic gate valve, and is widely suitable for the flow and cut-off of liquid, gas, dust and the like.

[0003] The existing gate valve does not set a limiting mechanism when in use, so that the gate board in the gate valve is impacted by the flow of liquid and the like and vibrates, which causes a certain wear to the thread between the top sleeve of the gate board and the threaded rod, and further affects the sealing performance of the gate board after the gate valve is closed.

[0004] Therefore, it is necessary to provide a full closed gate valve to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a full closed gate valve, through the mutual cooperation between the internal parts of the sealing mechanism, the sealing operation of the inner wall channel of the gate valve main body can be completed, through the mutual cooperation between the internal parts of the limiting mechanism, the gate valve plate and the inner wall of the gate valve main body can be limited, the influence of the rotation of the threaded rod on the limiting sleeve due to vibration is reduced, and therefore the sealing performance of the gate valve main body is improved, so that the problem that the gate valve in the prior art vibrates when in use due to the flow impact of liquid and the like, which causes a certain wear to the thread between the top sleeve of the gate board and the threaded rod, and further affects the sealing performance of the gate valve after the gate valve is closed.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a full closed gate valve, including the gate valve main body, the top of the gate valve main body is provided with the sealing mechanism, and is penetrated to the inside of the gate valve main body, the outer wall of the sealing mechanism is connected with the limiting mechanism in sliding mode, and is penetrated to the inside of the gate valve main body.

[0007] Preferably, the sealing mechanism comprises a support rod fixedly connected to the top end of the gate valve body, a rotating wheel rotatably connected to the top end of the support rod, a threaded rod fixedly connected to the bottom end of the rotating wheel and penetrating the inner wall of the support rod, a limiting sleeve slidably connected to the inner wall of the support rod and sleeved with the outer wall of the threaded rod and penetrating the inside of the gate valve body, and a gate valve plate fixedly connected to the bottom end of the limiting sleeve and slidably connected to the inside of the gate valve body and sealingly abutting the inner wall of the gate valve body.

[0008] Preferably, the limiting mechanism comprises a connecting plate slidably connected to the outer wall of the support rod on both sides and slidably connected to the inner wall of the support rod, a pull rod arranged on the side of the connecting plate away from the support rod, a spherical sliding block arranged at the abutting position of the connecting plate and the inner wall of the support rod, support plates arranged at both ends of the connecting plate and slidably connected to the inner wall of the support rod and penetrating the support rod to the inner wall of the gate valve body, a limiting baffle fixedly connected to the side of the bottom end of the support plate and located at the top end of the limiting sleeve and abutting the limiting sleeve, and a transmission gear arranged between the support plate and the connecting plate and rotatably connected to the inner wall of the support rod through a support shaft.

[0009] Preferably, the inner wall of the limiting sleeve is provided with an internal thread matched with the external thread of the threaded rod, the inner wall of the gate valve body is provided with a sealing groove matched with the limiting sleeve and the gate valve plate, the inner wall of the support rod is provided with a limiting sliding groove matched with the limiting sleeve, and the outer wall of the gate valve plate is provided with a sealing gasket abutting the inner wall of the gate valve body.

[0010] Preferably, the inner wall of the support rod is provided with a moving groove matched with the connecting plate, the inner wall of the support rod is provided with a clamping groove matched with the spherical sliding block, and the outer wall of the support rod is provided with a lifting groove matched with the limiting baffle.

[0011] Preferably, the outer wall of the support plate and the outer wall of the connecting plate are each provided with a tooth groove meshing with the tooth block of the outer wall of the transmission gear, the bottom end of the limiting baffle is provided with a clamping block, and the top end of the limiting sleeve is provided with a limiting groove matched with the clamping block.

[0012] In the above technical solution, the technical effects and advantages of the utility model are provided:

[0013] 1. By rotating the rotating wheel at the top end of the support rod by the staff, the rotating wheel rotates the threaded rod, the threaded rod rotates and drives the limiting sleeve to slide in the inner wall of the support rod, so that the limiting sleeve slides from the top end of the inner wall of the support rod to the bottom end of the inner wall of the support rod, and the top end of the limiting sleeve abuts the top end of the gate valve body, the limiting sleeve slides and drives the gate valve plate at the bottom end to slide in the inner wall of the gate valve body, so that the gate valve plate slides and completely abuts the passage in the inner wall of the gate valve body, so that the gate valve body is in a high sealing state.

[0014] 2. When the operator pulls the lever, the connecting plate moves, sliding on the outer wall of the support rod from the bottom to the top. Simultaneously, the connecting plate's height is limited and fixed by a spherical slider. The sliding of the connecting plate on the outer wall of the support rod causes the transmission gears to rotate via the toothed grooves on both sides. This rotation of the transmission gears causes the support plate to slide from the top to the bottom of the outer wall of the support rod. The movement of the support plate causes the limiting stop to engage with the top of the limiting sleeve, and the locking block to penetrate to the top of the limiting sleeve. This ensures that after the gate valve plate is completely sealed, the limiting sleeve will not slide upwards due to vibration, thus improving the sealing performance between the gate valve plate and the gate valve body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the gate valve body of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the support rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure of the connecting plate of this utility model;

[0020] Figure 5 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0021] Figure 6 For the present utility model Figure 3 Enlarged structural diagram at point B.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Gate valve body; 2. Sealing mechanism; 201. Support rod; 202. Rotary wheel; 203. Threaded rod; 204. Limiting sleeve; 205. Gate valve plate; 3. Limiting mechanism; 301. Connecting plate; 302. Pull rod; 303. Spherical slider; 304. Support plate; 305. Limiting stop bar; 306. Transmission gear. Detailed Implementation

[0024] In order to make the technical scheme of the utility model better understood by the skilled in the art, the utility model will be further described in detail below in conjunction with the drawings.

[0025] The utility model provides a kind of full-closed gate valve as Figures 1-6 As shown in a kind of full-closed gate valve, including gate valve main body 1, the top of gate valve main body 1 is provided with sealing mechanism 2, and it is passed to the inside of gate valve main body 1, the outer wall of sealing mechanism 2 is slidably connected with limiting mechanism 3, and it is passed to the inside of gate valve main body 1 of sealing mechanism 2, by the mutual cooperation between the internal parts of sealing mechanism 2, the sealing operation of the inner wall passage of gate valve main body 1 can be completed, by the mutual cooperation between the internal parts of limiting mechanism 3, the limiting of gate valve plate 205 and the inner wall of gate valve main body 1 can be carried out, reduce the influence of threaded rod 203 rotation on limiting sliding sleeve 204 due to vibration, to improve the sealing property of gate valve main body 1.

[0026] Refer to the drawings of the specification Figures 1-6 Sealing mechanism 2 includes support rod 201, support rod 201 is connected and fixed at the top of gate valve main body 1, the top of support rod 201 is rotatably connected with runner 202, the bottom of runner 202 is connected and fixed with threaded rod 203, and it is passed to the inner wall of support rod 201, the inner wall of support rod 201 is slidably connected with limiting sliding sleeve 204, and it is connected with the outer wall of threaded rod 203 and is passed to the inside of gate valve main body 1, the bottom of limiting sliding sleeve 204 is connected and fixed with gate valve plate 205, and is slidably connected in the inside of gate valve main body 1, and is sealed and fits with the inner wall of gate valve main body 1, by the mutual cooperation between the internal parts of sealing mechanism 2, the sealing operation of the inner wall passage of gate valve main body 1 can be completed.

[0027] Refer to the drawings of the specification Figures 1-6 Limiting mechanism 3 includes connecting plate 301, connecting plate 301 is slidably connected on the both sides of the outer wall of support rod 201, and is slidably connected on the inner wall of support rod 201, the side, away from support rod 201, of connecting plate 301 is provided with pull rod 302, connecting plate 301 is provided with spherical slide 303 at the place of fitting with the inner wall of support rod 201, both ends of connecting plate 301 are provided with support plate 304, and are slidably connected on the inner wall of support rod 201, and are passed to the inner wall of gate valve main body 1 of support rod 201, one side of the bottom of support plate 304 is connected and fixed with limiting baffle 305, and is located at the top of limiting sliding sleeve 204, and fits with limiting sliding sleeve 204, transmission gear 306 is arranged between support plate 304 and connecting plate 301, and is rotatably connected on the inner wall of support rod 201 by support shaft, by the mutual cooperation between the internal parts of limiting mechanism 3, the limiting of gate valve plate 205 and the inner wall of gate valve main body 1 can be carried out, reduce the influence of threaded rod 203 rotation on limiting sliding sleeve 204 due to vibration, to improve the sealing property of gate valve main body 1.

[0028] With reference to the description Figures 1-6 The inner wall of the limiting sliding sleeve 204 is provided with internal threads matched with the external threads of the threaded rod 203, the inner wall of the gate valve body 1 is provided with a sealing groove matched with the limiting sliding sleeve 204 and the gate valve plate 205, and the inner wall of the supporting rod 201 is provided with a limiting sliding groove matched with the limiting sliding sleeve 204.

[0029] With reference to the description Figures 1-6 The inner wall of the supporting rod 201 is provided with a moving groove matched with the connecting plate 301, the inner wall of the supporting rod 201 is provided with a clamping groove matched with the spherical sliding block 303, and the outer wall of the supporting rod 201 is provided with lifting grooves matched with the limiting blocking strips 305 on both sides.

[0030] With reference to the description Figures 1-6 The outer wall of the supporting plate 304 and the connecting plate 301 are both provided with tooth grooves matched with the tooth blocks of the transmission gear 306, the bottom end of the limiting blocking strip 305 is provided with a clamping block, and the top end of the limiting sliding sleeve 204 is provided with a limiting groove matched with the clamping block.

[0031] The utility model discloses a working principle:

[0032] With reference to the description Figures 1-6 The staff rotates the rotating wheel 202 at the top end of the supporting rod 201, the rotating wheel 202 rotates the threaded rod 203, the threaded rod 203 rotates and drives the limiting sliding sleeve 204 to slide in the inner wall of the supporting rod 201, the limiting sliding sleeve 204 slides from the top end of the inner wall of the supporting rod 201 to the bottom end of the inner wall of the supporting rod 201, the top end of the limiting sliding sleeve 204 is matched with the top end of the gate valve body 1, the limiting sliding sleeve 204 drives the gate valve plate 205 at the bottom end to slide in the inner wall of the gate valve body 1, the gate valve plate 205 is completely matched with the channel in the inner wall of the gate valve body 1, and the gate valve body 1 is in a high sealing state.

[0033] With reference to the description Figures 1-6, by the staff pull the pull rod 302, by the pull rod 302 drive the connecting plate 301 moves, make the connecting plate 301 in the support rod 201 outer wall sliding, and from the support rod 201 outer wall bottom end sliding to the support rod 201 outer wall top end, simultaneously the connecting plate 301 through the spherical sliding block 303 to the height position of connecting plate 301 limit fixed, through the connecting plate 301 in the support rod 201 outer wall sliding, make the connecting plate 301 through both sides tooth groove drive transmission gear 306 rotation, transmission gear 306 rotation drive support plate 304 sliding, make support plate 304 from the support rod 201 outer wall top end sliding to bottom end, support plate 304 moves drive limit stop bar 305 with limit sliding sleeve 204 top end abut, and drive the clamping block through to limit sliding sleeve 204 top end, namely can make the gate valve plate 205 completely sealed, limit sliding sleeve 204 will not be affected by vibration and slide upward, thereby improve the gate valve plate 205 with the sealing property of gate valve main body 1.

[0034] The above only describes certain exemplary embodiments of the present application by way of illustration, without doubt, for those skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection claimed by the present application.

Claims

1. A full-closed gate valve comprising a gate valve body (1), characterized in that: The top end of the gate valve body (1) is provided with a sealing mechanism (2) penetrating into the inside of the gate valve body (1), the outer wall of the sealing mechanism (2) is slidingly connected with a limiting mechanism (3) penetrating into the inside of the gate valve body (1). The sealing mechanism (2) comprises a supporting rod (201) fixedly connected at the top end of the gate valve body (1), the top end of the supporting rod (201) is rotatably connected with a rotating wheel (202), the bottom end of the rotating wheel (202) is fixedly connected with a threaded rod (203) penetrating into the inner wall of the supporting rod (201), the inner wall of the supporting rod (201) is slidingly connected with a limiting sliding sleeve (204) sleeved with the outer wall of the threaded rod (203) and penetrating into the inside of the gate valve body (1), the bottom end of the limiting sliding sleeve (204) is fixedly connected with a gate valve plate (205) slidingly connected in the inside of the gate valve body (1) and sealingly abutting the inner wall of the gate valve body (1). The limiting mechanism (3) comprises a connecting plate (301) slidingly connected on both sides of the outer wall of the supporting rod (201) and the inner wall of the supporting rod (201), the side of the connecting plate (301) away from the supporting rod (201) is provided with a pull rod (302), the abutting position of the connecting plate (301) and the inner wall of the supporting rod (201) is provided with a spherical sliding block (303), both ends of the connecting plate (301) are provided with supporting plates (304) slidingly connected on the inner wall of the supporting rod (201) and penetrating the supporting rod (201) to the inner wall of the gate valve body (1), one side of the bottom end of the supporting plate (304) is fixedly connected with a limiting baffle (305) located at the top end of the limiting sliding sleeve (204) and abutting the limiting sliding sleeve (204), the supporting plate (304) and the connecting plate (301) are provided with a transmission gear (306) rotatably connected on the inner wall of the supporting rod (201) through a supporting shaft.

2. A fully enclosed gate valve according to claim 1, wherein: The inner wall of the limiting sliding sleeve (204) is provided with an inner thread matched with the outer thread of the threaded rod (203), the inner wall of the gate valve body (1) is provided with a sealing groove matched with the limiting sliding sleeve (204) and the gate valve plate (205), the inner wall of the supporting rod (201) is provided with a limiting sliding groove matched with the limiting sliding sleeve (204), and the outer wall of the gate valve plate (205) is provided with a sealing pad abutting the inner wall of the gate valve body (1).

3. A fully enclosed gate valve according to claim 2, wherein: The inner wall of the supporting rod (201) is provided with a moving groove matched with the connecting plate (301), the inner wall of the supporting rod (201) is provided with a clamping groove matched with the spherical sliding block (303), and both sides of the outer wall of the supporting rod (201) are provided with lifting grooves matched with the limiting baffle (305).

4. A fully enclosed gate valve according to claim 3, wherein: The outer wall of the supporting plate (304) and the connecting plate (301) are provided with tooth grooves meshing with the tooth blocks of the outer wall of the transmission gear (306), the bottom end of the limiting baffle (305) is provided with a clamping block, and the top end of the limiting sliding sleeve (204) is provided with a limiting groove matched with the clamping block.

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