Protective gate valve

Abstract

The protective gate valve comprises a valve body and a valve plate, the valve body is composed of connecting parts and an opening and closing part, the two sides of the opening and closing part are symmetrically connected with the connecting parts, the upper surface of the opening and closing part is fixedly connected with a main motor, the main motor is connected with a main lead screw through a coupler, and the main lead screw is movably connected to the top of an inner cavity of the opening and closing part through a sealing bearing. And meanwhile, the lower end of the main lead screw is screwed into a screwing groove formed in the valve plate, buffering grooves are symmetrically formed in the two sides of the valve plate, buffering assemblies are symmetrically connected to the two sides of the surfaces of the buffering grooves, and the buffering plate is slidably connected into the buffering grooves through the buffering assemblies. According to the gate valve, the opening and closing part is matched with the main lead screw, so that the valve plate can stably move in the valve body, the probability of moving faults of the valve plate is reduced, and the practicability of the gate valve is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a protective gate valve. Background Technique

[0002] Civil air defense projects are underground buildings constructed to ensure the smooth supply of wartime materials and medical rescue. Although their utilization rate is very low in modern society, they are of great significance. Civil air defense projects are constructed in accordance with relevant regulations. When water pipes enter the protection area of civil air defense projects, protective gate valves must be installed on the water pipes. The protective gate valves can only be made of stainless steel or copper cores, and the axis of the valve body must be perpendicular to the plate surface.

[0003] After retrieval, a new type of protective gate valve (publication number: CN217177466U) disclosed in the prior art records that "it includes a valve body and a valve cover. The valve cover is detachably arranged on the valve body. A slideway is opened in the valve body. A valve plate is slidably installed in the slideway of the valve body. A first receiving groove is opened on the side of the slideway on the valve body. A first slider is arranged at a position on the valve plate opposite to the first receiving groove. The first slider slides and is slidably matched with the first receiving groove. A driving mechanism is also arranged on the valve body. The driving mechanism is connected to the first slider and is used to drive the first slider to move along the length direction of the first receiving groove."; when the gate valve needs to be opened and closed, the driving mechanism drives the first slider to move along the length direction of the first receiving groove, and then drives the gate plate to move in the vertical direction, so as to open and close the gate valve. The installation requires little space. And a first gear is installed on the first lead screw, and a second gear is installed on the second lead screw. A chain is wound around between the first gear and the second gear. When the first lead screw rotates, the second lead screw is driven to rotate synchronously through the chain, so as to drive the two sides of the valve plate to move synchronously. To a certain extent, it avoids the valve plate being stuck in the slideway. However, for this gate valve, the double lead screws drive the valve plate synchronously, and a very high precision of synchronous rotation is required between the double lead screws to ensure that the two sides of the valve plate can move synchronously. After long-term use, transmission errors are likely to occur between the first lead screw and the second lead screw and the first slider and the second slider due to wear and other problems, resulting in the inability of the first slider and the second slider to move synchronously, and then the valve plate is likely to be stuck. At the same time, there is a lack of corresponding buffer structures inside this gate valve. When the gate valve changes from the open state to the closed state, the liquid in the pipeline will form a corresponding impact on the valve plate, which will increase the probability of damage to the corresponding structures inside the gate valve and also affect the connection structures outside the gate valve. Content of the Utility Model

[0004] In order to overcome the defects existing in the prior art, a protective gate valve is provided to solve the problems raised in the above background technique.

[0005] To achieve the above object, a protective gate valve is provided, including: a valve body and a valve plate. The valve body is composed of a connecting part and an opening and closing part. The two sides of the opening and closing part are symmetrically connected to the connecting part. A main motor is fixedly connected to the upper surface of the opening and closing part. The main motor is connected to a main lead screw through a coupling. The main lead screw is movably connected to the top of the inner cavity of the opening and closing part through a sealing bearing. At the same time, the lower end of the main lead screw is screwed into a screw connection groove opened on the valve plate. Buffer grooves are symmetrically opened on both sides of the valve plate. Buffer components are symmetrically connected to both sides of the surface of the buffer grooves. The buffer plate is slidably connected to the buffer grooves through the buffer components.

[0006] Preferably, the opening and closing part is in a cuboid structure, the connecting part is in a cylindrical structure, and the whole valve body is in a T-shaped structure. At the same time, drain openings are symmetrically opened on one side of the bottom of the inner cavity of the opening and closing part close to the water outlet of the valve body. The cross-section of the drain openings is in a triangular structure.

[0007] Preferably, the valve plate is in a rectangular structure. The size of the valve plate is adapted to the inner cavity of the opening and closing part. The height of the inner cavity of the opening and closing part is greater than the height of the valve plate. The two groups of side gaskets fixedly connected to both sides of the valve plate are both in a square-shaped structure. At the same time, the bottom gasket fixedly connected to the lower surface of the valve plate is in a square structure.

[0008] Preferably, the two groups of buffer grooves symmetrically opened on both sides of the valve plate are both in a square structure. The size of the buffer grooves is larger than the size of the opening of the inner cavity of the connecting part. The cross-section formed by the combination of the buffer grooves and the valve plate is in an I-shaped structure. At the same time, the screw connection groove opened in the valve plate only communicates with the upper surface of the valve plate.

[0009] Preferably, three groups of buffer components are respectively fixedly connected at equal intervals on both sides of the surface of the buffer grooves. A buffer rod in the buffer component is fixedly connected to the surface of the buffer plate. The buffer plate is in a square structure. The sealing ring fixedly connected to the outer side surface of the buffer plate is in a square-shaped structure.

[0010] Preferably, the buffer component is composed of a buffer rod and a fixed cylinder. The fixed cylinder is in a cylindrical structure. Two groups of receiving grooves are symmetrically opened at both ends of the fixed cylinder. Both groups of receiving grooves are in a cylindrical structure. A spring is fixedly connected in the receiving grooves. The combination of the fixed cylinder and the receiving grooves forms an I-shaped structure.

[0011] Preferably, the buffer rod is in a cylindrical structure. The axial cross-section of the buffer rod is in a T-shaped structure. A sealing sleeve is fixedly connected to the opening end of the receiving groove. The sealing sleeve is in a cylindrical structure. The inner side surface of the sealing sleeve is adapted to the size of the buffer rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: Through the cooperation of the main motor, the main lead screw, the opening and closing part and the valve plate, the gate valve can be smoothly opened and closed, reducing the probability of the valve plate getting stuck in the inner cavity of the opening and closing part and reducing the probability of the gate valve malfunctioning. At the same time, through the cooperation of the valve plate, the buffer assembly, the buffer groove and the buffer plate, when the gate valve cuts off the liquid, the impact force of the liquid can act on the surface of the buffer plate, reducing the impact force on the valve plate, thereby reducing the probability of damage to the internal structure of the gate valve and ensuring the stability of the external connection structure of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0014] Figure 2 It is a side view schematic diagram of an embodiment of the utility model.

[0015] Figure 3 It is a top view schematic diagram of an embodiment of the utility model.

[0016] Figure 4 It is a schematic diagram of the buffer assembly structure of an embodiment of the utility model.

[0017] In the figure: 1, valve body; 2, connecting part; 3, opening and closing part; 4, buffer groove; 5, screwing groove; 6, valve plate; 7, buffer assembly; 8, buffer plate; 9, main lead screw; 10, main motor; 11, drain port; 12, buffer rod; 13, sealing sleeve; 14, fixed cylinder; 15, storage groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Referring to Figures 1 to 4 As shown, the utility model provides a protective gate valve, including: a valve body 1 and a valve plate 6. The valve body 1 is composed of a connecting part 2 and an opening and closing part 3. The two sides of the opening and closing part 3 are symmetrically connected to the connecting part 2, and the main motor 10 is fixedly connected to the upper surface of the opening and closing part 3. The main motor 10 is connected to the main lead screw 9 through a coupling. The main lead screw 9 is movably connected to the top of the inner cavity of the opening and closing part 3 through a sealing bearing. At the same time, the lower end of the main lead screw 9 is screwed into the screwing groove 5 opened on the valve plate 6. Buffer grooves 4 are symmetrically opened on both sides of the valve plate 6, and buffer assemblies 7 are symmetrically connected to both sides of the surface of the buffer grooves 4. The buffer plate 8 is slidably connected to the buffer grooves 4 through the buffer assemblies 7.

[0019] In this embodiment, the connection part 2 of the protective gate valve is connected to the pipeline, so that the liquid in the pipeline can flow in through the water inlet of the protective gate valve and flow out from the water outlet. When it is necessary to cut off the liquid flow, the switch of the main motor 10 is started. The main motor 10 drives the main lead screw 9 to rotate through the coupling. The main lead screw 9 pushes the screwed valve plate 6 downward. After the valve plate 6 resets to cut off the liquid, the liquid at the water inlet of the protective gate valve will impact the valve plate 6, and the impact force of the liquid will directly act on the surface of the buffer plate 8, causing the buffer plate 8 to push the buffer rod 12 to squeeze the spring in the fixed cylinder 14, thereby effectively weakening the impact of the liquid on the inside of the valve body 1, reducing the probability of damage to the internal structure of the valve body 1, and also effectively reducing the probability of vibration of the entire protective gate valve, ensuring the stability of the external connection structure of the valve body 1. After the impact force of the liquid weakens, the buffer plate 8 and the buffer rod 12 will reset under the action of the corresponding compressed spring to ensure the liquid cutoff effect of the protective gate valve.

[0020] As a preferred embodiment, the opening and closing part 3 has a cuboid structure, the connection part 2 has a cylindrical structure, and the valve body 1 as a whole has a T-shaped structure. At the same time, drainage ports 11 are symmetrically opened on one side of the bottom of the inner cavity of the opening and closing part 3 close to the water outlet of the valve body 1, and the cross-section of the drainage port 11 is triangular.

[0021] In this embodiment, as Figure 1 and Figure 3 , the opening of the drainage ports 11 can synchronously discharge the liquid located at the bottom of the opening and closing part 3 when the valve body 1 cuts off the liquid, avoiding the liquid in this part from hindering the reset of the valve plate 6 and ensuring that the opening and closing part 3 can be smoothly switched from the open state to the closed state.

[0022] As a preferred embodiment, the valve plate 6 has a rectangular structure, the size of the valve plate 6 is adapted to the inner cavity of the opening and closing part 3, and the height of the inner cavity of the opening and closing part 3 is greater than the height of the valve plate 6. The two side gaskets fixedly connected to the two side surfaces of the valve plate 6 are both in a square frame structure, and the bottom gasket fixedly connected to the lower surface of the valve plate 6 is square.

[0023] In this embodiment, as Figure 1 , Figure 2 and Figure 3 , the size of the valve plate 6 being adapted to the inner cavity of the opening and closing part 3 can assist in enhancing the stability of the valve plate 6 during movement. Moreover, both the side gaskets and the bottom gasket are made of soft rubber material, which can then assist in enhancing the sealing performance at the connection between the opening and closing part 3 and the valve plate 6, ensuring the liquid cutoff effect of the protective gate valve.

[0024] As a preferred embodiment, the two sets of buffer grooves 4 symmetrically opened on both sides of the valve plate 6 are both square structures, and the size of the buffer groove 4 is larger than the size of the inner cavity opening of the connecting portion 2. Moreover, the cross-section formed by the combination of the buffer groove 4 and the valve plate 6 is an I-shaped structure. At the same time, the screw connection groove 5 opened in the valve plate 6 only communicates with the upper surface of the valve plate 6.

[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 3 , the size of the buffer groove 4 is larger than the size of the inner cavity opening of the connecting portion 2. Then, after the protective gate valve is closed, the liquid on the water inlet side of the valve body 1 will directly impact on the surface of the buffer plate 8, thereby being able to assist in reducing the impact force received by the valve plate 6 and the vibration intensity generated by the valve body 1 accordingly.

[0026] As a preferred embodiment, three sets of buffer components 7 are respectively and equidistantly fixedly connected to both sides of the surface of the buffer groove 4. The buffer rod 12 in the buffer component 7 is fixedly connected to the surface of the buffer plate 8. Moreover, the buffer plate 8 is a square structure, and the sealing ring fixedly connected to the outer side surface of the buffer plate 8 is an O-shaped structure.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3 , the sealing ring is made of soft rubber material. Then, it can assist in enhancing the sealing performance at the connection between the buffer plate 8 and the buffer groove 4, reducing the probability of liquid penetrating into the buffer groove 4, and ensuring that the buffer plate 8 can slide correspondingly in the buffer groove 4, thereby achieving the weakening of the liquid impact force.

[0028] As a preferred embodiment, the buffer component 7 is composed of a buffer rod 12 and a fixed cylinder 14. Moreover, the fixed cylinder 14 is a cylindrical structure. Two sets of storage grooves 15 are symmetrically opened at both ends of the fixed cylinder 14. Both sets of storage grooves 15 are cylindrical structures. At the same time, springs are fixedly connected in the storage grooves 15, and the combination of the fixed cylinder 14 and the storage grooves 15 forms an I-shaped structure.

[0029] In this embodiment, as Figure 4 , the fixed cylinder 14 is fixedly connected in the through hole opened in the valve plate 6, and the two sets of storage grooves 15 at both ends of the fixed cylinder 14 are not communicated. Therefore, when liquid penetrates into the buffer groove 4 and the storage grooves 15, the protective gate valve still will not have a leakage problem, ensuring the liquid cutoff effect of the protective gate valve.

[0030] As a preferred embodiment, the buffer rod 12 is a cylindrical structure, the axial section of the buffer rod 12 is a T-shaped structure, and a sealing sleeve 13 is fixedly connected to the open end of the storage groove 15. The sealing sleeve 13 is a cylindrical structure, and the inner side surface of the sealing sleeve 13 is adapted to the size of the buffer rod 12.

[0031] In this embodiment, asFigure 4 The sealing sleeve 13 can be made of soft rubber material, which can effectively enhance the sealing performance at the contact surface between the inner side of the sealing sleeve 13 and the buffer rod 12. Moreover, the setting of the sealing sleeve 13 can not only prevent the buffer rod 12 from accidentally detaching from the fixed cylinder 14 under the action of the corresponding spring, but also reduce the probability of liquid penetrating into the storage groove 15, ensuring that the buffer plate 8 and the buffer rod 12 have a good buffering and weakening effect when facing liquid impact.

[0032] Through the cooperation of the opening and closing part 3 and the main lead screw 9 of the protection gate valve of the present utility model, the valve plate 6 can move stably inside the valve body 1, thereby reducing the probability of movement failure of the valve plate 6 and enhancing the practicability of the gate valve. At the same time, the cooperation of the buffer plate 8 and the buffer assembly 7 can effectively reduce the impact force of the liquid on the valve plate 6, thereby reducing the probability of damage to the internal structure of the gate valve.

Claims

1. A protective gate valve, comprising: A valve body (1) and a valve plate (6), characterized in that: the valve body (1) is composed of a connecting part (2) and an opening and closing part (3), and the two sides of the opening and closing part (3) are symmetrically connected to the connecting part (2), and the upper surface of the opening and closing part (3) is fixedly connected to the main motor (10), the main motor (10) is connected to the main screw (9) through a coupling, and the main screw (9) is movably connected to the top of the inner cavity of the opening and closing part (3) through a sealed bearing, and at the same time, the lower end of the main screw (9) is screwed into the screw groove (5) opened on the valve plate (6), the buffer groove (4) is symmetrically opened on both sides of the valve plate (6), and the two sides of the surface of the buffer groove (4) are symmetrically connected to the buffer assembly (7), and the buffer plate (8) is slidably connected in the buffer groove (4) through the buffer assembly (7).

2. A protective gate valve according to claim 1, characterized in that: The opening and closing portion (3) is in a rectangular parallelepiped structure, while the connecting portion (2) is in a cylindrical structure, and the valve body (1) is in a T-shaped structure as a whole. At the same time, a drainage port (11) is symmetrically provided on one side of the bottom of the inner cavity of the opening and closing portion (3) close to the water outlet of the valve body (1), and the cross-section of the drainage port (11) is in a triangular structure.

3. A protective gate valve according to claim 1, characterized in that: The valve plate (6) is of a rectangular structure, the dimensions of the valve plate (6) and the inner cavity of the opening and closing portion (3) are matched, and the height of the inner cavity of the opening and closing portion (3) is greater than the height of the valve plate (6), and the two sets of side sealing gaskets fixedly connected to the two side surfaces of the valve plate (6) are both of a U-shaped structure, and the bottom sealing gasket fixedly connected to the lower surface of the valve plate (6) is of a square structure.

4. A protective gate valve according to claim 1, characterized in that: The two groups of buffer grooves (4) symmetrically opened on both sides of the valve plate (6) are both square structures, and the size of the buffer groove (4) is larger than the size of the inner cavity opening of the connecting portion (2), and the cross-section formed by the combination of the buffer groove (4) and the valve plate (6) is an I-shaped structure, and the screw groove (5) opened in the valve plate (6) is only connected to the upper surface of the valve plate (6).

5. A protective gate valve according to claim 1, characterized in that: Three groups of buffer components (7) are fixedly connected at equal intervals on both sides of the surface of the buffer groove (4), and the surface of the buffer plate (8) is fixedly connected to the buffer rod (12) in the buffer component (7), and the buffer plate (8) is in a square structure, while the sealing ring fixedly connected to the outer side surface of the buffer plate (8) is in a square-shaped structure.

6. A protective gate valve according to claim 1, characterized in that: The buffer assembly (7) is composed of a buffer rod (12) and a fixed cylinder (14), and the fixed cylinder (14) is in a cylindrical structure. Two groups of receiving grooves (15) are symmetrically provided at both ends of the fixed cylinder (14), and both groups of receiving grooves (15) are in a cylindrical structure. A connecting spring is fixed in the receiving groove (15), and the fixed cylinder (14) and the receiving groove (15) are combined together to form an I-shaped structure.

7. A protective gate valve according to claim 6, characterized in that: The buffer rod (12) is of cylindrical structure, the axial cross section of the buffer rod (12) is of T-shaped structure, and the opening end of the receiving groove (15) is fixedly connected to the sealing sleeve (13), the sealing sleeve (13) is of cylindrical structure, and the inner side surface of the sealing sleeve (13) and the buffer rod (12) are matched in size.

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