Lifting type stop valve

Abstract

The lifting type stop valve comprises a valve body, a valve seat and a valve clack, a mounting cavity is formed in the side wall of the valve body in an extending mode, a piston cavity is formed in the end, away from the valve body, of the mounting cavity, a piston is coaxially fixed to one end of the valve clack, and the piston is arranged in the piston cavity in a sliding mode. A valve deck is coaxially fixed to the end, away from the valve body, of the piston cavity, a through hole communicated with the water inlet channel or the outside is formed in the center of the valve deck, and the sectional area of the piston is larger than that of the valve clack. According to the lifting type stop valve, by means of the mode that the sectional area of the piston is larger than the sectional area of the valve clack, the thrust borne by the piston in the water injection process can be larger than the thrust borne by the valve clack, and therefore the valve clack can be pushed to the valve seat to close the valve, and the valve is automatically opened by pushing the valve clack through water flow in the emptying process.

Description

Technical Field

[0001] The utility model relates to a stop valve, more particularly to a lifting stop valve. Background Art

[0002] The stop valve uses a valve disc to control the pipeline. The valve disc is driven by the valve stem to achieve the passage and circuit breaker control of the upstream and downstream media in the valve body. Since the stop valve has only one sealing surface on the valve disc, this structure makes the stop valve easy to manufacture and process, has good processability, and is easier to maintain.

[0003] However, the control of large-sized stop valves still has the problem of requiring on-site operation and a large amount of manpower. For this reason, there is a patent in the existing technology with the number 202222551887.6, which is named a lifting type stop valve control device. It discloses a method of setting a guide box, then setting a piston cylinder in the guide box, and setting a piston connected to the valve stem in the piston cylinder to achieve the control of the valve stem up and down by injecting pressurized water into the piston cylinder, and then achieving the control of the opening and closing of the large-sized stop valve by controlling the small flow of water using an external solenoid valve. However, the operation of the above structure requires the setting of two ways to inject medium and two ways to empty. For this reason, at least four solenoid valves need to be set to coordinate opening and closing, which makes the control instructions in the process of opening and closing the stop valve more complicated, resulting in the problem of high cost of using the stop valve. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a lifting stop valve with simple control instructions and low use cost.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a lift-type stop valve, comprising a valve body, a valve seat and a valve disc, a flow channel being provided in the valve body, the valve seat being fixedly installed in the flow channel, the valve disc being slidably arranged in the valve body to cooperate with the valve seat to close or open the flow channel, a mounting cavity extending from the side wall of the valve body, a piston cavity being provided at one end of the mounting cavity away from the valve body, a piston being coaxially fixed to one end of the valve disc, the piston being slidably arranged in the piston cavity to drive the valve disc and the valve seat to resist each other to close the flow channel or to move away from each other to open the flow channel, a through hole being provided at the end of the piston cavity away from the valve body to inject medium into the upper cavity of the piston cavity or to empty the upper cavity of the piston cavity, and the cross-sectional area of ​​the piston is larger than the cross-sectional area of ​​the valve disc.

[0006] As a further improvement of the present invention, the piston includes a plug block and a plug rod, one end of the plug rod is coaxially fixed with the valve disc, and the other end is coaxially fixed with the plug block, the plug block is arranged in the piston cavity, and the side of the plug block is sealed with the cavity wall of the piston cavity, and the cross-sectional area of ​​the plug block is greater than the cross-sectional area of ​​the valve disc and the cross-sectional area of ​​the plug rod.

[0007] As a further improvement of the present invention, a fixing seat is coaxially fixed in the installation cavity. The fixing seat is hollow cylindrical and coaxially embedded in the installation cavity. The piston cavity is arranged at one end of the fixing seat away from the valve seat.

[0008] As a further improvement of the present invention, the valve seat and valve disc are both made of ceramic material, the end of the fixed seat abuts against the cross-section of the valve seat to fix the valve seat in the valve body, and a water-passing gap is opened on the side wall of one end of the fixed seat facing the valve seat, and the water-passing gap is connected to the circulation channel.

[0009] As a further improvement of the present invention, the valve disc includes a guide cone and a ceramic sealing disc, the flat end of the guide cone is coaxially fixed with a mounting column, the mounting column is coaxially threadedly fixed to the end of the plug rod, and the ceramic sealing disc is coaxially sleeved on the end of the plug rod, and the axial movement of the ceramic sealing disc is limited by the cooperation between the flat end of the guide cone and the end face of the plug rod.

[0010] As a further improvement of the present invention, an annular groove is provided on the outer wall of the fixing seat away from the valve seat, and a sealing ring is embedded in the annular groove to ensure a sealed connection between the outer wall of the fixing seat and the installation cavity.

[0011] As a further improvement of the present invention, the plug block and the plug rod are both hollow structures, and the plug block and the plug rod are internally communicated with each other.

[0012] The beneficial effect of the present invention is that, by arranging the valve body, the valve seat and the valve disc, as well as the installation chamber and the piston chamber, a stop valve structure that is actuated by a piston to open and close the valve as in the prior art can be realized. By coaxially fixing a valve cover to the end of the piston chamber away from the valve body, a through hole is opened at the center of the valve cover, which is connected to the water inlet channel or the outside through the reversing valve. The cross-sectional area of ​​the piston is larger than the cross-sectional area of ​​the valve disc. Therefore, when it is necessary to close the valve, water in the water inlet channel is injected into the upper chamber of the piston chamber by the external reversing valve, thereby pushing the piston toward the valve seat, thereby achieving the effect of closing the valve. When it is necessary to open the valve, it is only necessary to connect the upper chamber of the piston chamber to the atmosphere through the reversing valve. In this way, the valve disc is pushed by water pressure to drive the piston to move away from the valve seat and empty the upper chamber of the piston chamber, thereby achieving the effect of opening the valve. Compared with the solution of dual water inlet and dual emptying in the prior art, the structure is simpler and the corresponding control instructions are also simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the lift-type stop valve of the utility model in a closed state;

[0014] Figure 2 This is a schematic diagram of the lift-type stop valve of the present invention in the opening / closing process state;

[0015] Figure 3 This is a schematic diagram of the lift-type stop valve of the utility model in a fully open state;

[0016] Figure 4 for Figure 1 The overall structure diagram of the middle fixed seat;

[0017] Figure 5 for Figure 1 The overall structure diagram of the middle piston. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0019] Reference Figures 1 to 5 As shown, a lift-type stop valve of the present embodiment includes a valve body 1, a valve seat 2 and a valve disc 3. A circulation channel is provided in the valve body 1, the valve seat 2 is fixedly installed in the circulation channel, and the valve disc 3 is slidably arranged in the valve body 1 to cooperate with the valve seat 2 to close or open the circulation channel. A mounting cavity 11 is extended from the side wall of the valve body 1, and a piston cavity 4 is provided at one end of the mounting cavity 11 away from the valve body 1. A piston 5 is coaxially fixed to one end of the valve disc 3. The piston 5 is slidably arranged in the piston cavity 4 to drive the valve disc 3 and the valve seat 2 to resist each other to close the circulation channel or to move away from each other to open the circulation channel. The end of the piston cavity 4 away from the valve body 1 is provided with a reversing valve and a water inlet channel (in this embodiment, the medium is water). The water inlet channel (if other media is used, it is the medium inlet channel) or the through hole connected to the atmosphere is used to inject the medium into the upper chamber of the piston chamber 4 or to empty the upper chamber of the piston chamber 4 through the reversing valve. The cross-sectional area of ​​the piston 5 is larger than the cross-sectional area of ​​the valve disc 3. The through hole in this embodiment is realized by connecting a valve cover to the end of the piston chamber 4 with bolts. In the process of using the lift stop valve of this embodiment, it is only necessary to install the valve body 1 into the external pipeline, so that water will flow through the circulation channel. The circulation channel in this embodiment has a water inlet and a water outlet as in the prior art, and a step is provided in the middle for the installation of the valve seat 2. The opening and closing of the stop valve is realized by the cooperation of the valve disc 3 and the valve seat 2. The specific opening and closing process is as follows:

[0020] Reference Figure 1 and Figure 2As shown in the figure, when the stop valve changes from the closed state to the open state:

[0021] At this time, the reversing valve controls the through hole in the center of the valve cover 41 to connect to the atmosphere and not to the water inlet. The water pressure acts on the valve disc 3, pushing the piston 5 to move upward and emptying the upper chamber of the piston chamber 4, so that the end of the piston 5 is against the valve cover 41, and the distance between the valve disc 3 and the valve seat 2 reaches the maximum, finally realizing the full opening of the stop valve.

[0022] Reference Figure 2 and Figure 3 As shown in the figure, when the stop valve changes from fully open to closed state:

[0023] At this time, the reversing valve controls the through hole in the center of the valve cover 41 to connect with the water inlet, but not with the atmosphere. Therefore, the incoming water flow will enter the upper chamber of the piston chamber 4, and the water flow will apply water pressure to the piston 5. At this time, since the cross-sectional area of ​​the piston 5 is larger than the cross-sectional area of ​​the valve disc 3, the water pressure in the direction of the piston 5 is stronger. Under the action of the pressure difference, the piston 5 is driven to move toward the valve seat 2, and then the valve disc 3 is pushed to move against the valve seat 2, and finally the shut-off valve is closed.

[0024] It can be seen from the above opening and closing process that in the above process, the instructions received by the reversing valve are only connected to the water inlet or to the atmosphere. Compared with the method in the prior art, the instructions are simpler and the structure is also simpler and more reliable.

[0025] As an improved specific embodiment, the piston 5 includes a plug 51 and a plug rod 52, one end of the plug rod 52 is coaxially fixed to the valve disc 3, and the other end is coaxially fixed to the plug 51, the plug 51 is arranged in the piston cavity 4, and the side of the plug 51 is sealed with the cavity wall of the piston cavity 4, the cross-sectional area of ​​the plug 51> the cross-sectional area of ​​the valve disc 3> the cross-sectional area of ​​the plug rod 52, through the arrangement of the above structure, it can be achieved that during the closing process of the stop valve, it is mainly pushed by the plug 51, and during the opening process, it is first pushed by the valve disc 3, and then continuously pushed by the water pressure acting on the plug rod 52, and finally pushed into place.

[0026] As an improved specific embodiment, a fixing seat 6 is coaxially fixed in the installation cavity 11. The fixing seat 6 is hollow cylindrical and coaxially embedded in the installation cavity 11. The piston cavity 4 is arranged at the end of the fixing seat 6 away from the valve seat 2. Through the setting of the above-mentioned fixing seat 6, a piston cavity 4 can be effectively formed in the installation cavity 11, so that it can be applicable to the existing valve body 1 structure without the need for additional special setting of the valve body 1 structure, thereby reducing production costs.

[0027] As an improved specific embodiment, the valve seat 2 and the valve flap 3 are both made of ceramic material, the end of the fixed seat 6 abuts against the cross-section of the valve seat 2 to fix the valve seat 2 in the valve body 1, and a water-passing gap 61 is opened on the side wall of one end of the fixed seat 6 facing the valve seat 2, and the water-passing gap 61 is connected to the circulation channel. By using ceramic materials for both the valve seat 2 and the valve flap 3, the sealing effect of the valve seat and the valve flap 3 can be effectively guaranteed, and the service life of the valve seat 2 and the valve flap 3 can also be extended.

[0028] As an improved specific embodiment, the valve flap 3 includes a guide cone 31 and a ceramic sealing disk 32. The flat end of the guide cone 31 is coaxially fixed with a mounting post 311, and the mounting post 311 is coaxially threadedly fixed on the end of the plug rod 52. The ceramic sealing disk 32 is coaxially sleeved on the end of the plug rod 52, and the axial movement of the ceramic sealing disk 32 is limited by the cooperation of the flat end of the guide cone 31 and the end face of the plug rod 52. Through the arrangement of the above structure, the guiding effect of the guide cone 31 can be effectively achieved, so that after the valve flap 3 is initially pushed by water pressure, the water flow can effectively flow through from both sides, which can further reduce the obstruction of the valve flap 3 to the water flow during the passage of water.

[0029] As an improved specific embodiment, an annular groove is provided on the outer wall of the fixed seat 6 away from the valve seat 2. A sealing ring is embedded in the annular groove to ensure a sealed connection between the outer wall of the fixed seat 6 and the mounting cavity 11. By setting the above structure, the sealing between the fixed seat 6 and the mounting cavity 11 can be achieved simply and effectively.

[0030] As a specific embodiment of the improvement, the plug block 51 and the plug rod 52 are both hollow structures, and the plug block 51 and the plug rod 52 are internally connected to each other. By making the plug block 51 and the plug rod 52 hollow structures, the mass of the plug block 51 and the plug rod 52 can be effectively reduced, so that the plug block 51 and the plug rod 52 can be better driven by water pressure.

[0031] To sum up, the lift-type stop valve of this embodiment can realize the opening and closing operations of the valve disc 3 with fewer injection ports and exhaust ports by providing a mounting cavity 11 on the valve body 1, providing a piston 5 in the mounting cavity 11, and making the cross-sectional area of ​​the piston 5 larger than the cross-sectional area of ​​the valve disc 3.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A lift-type stop valve, comprising a valve body (1), a valve seat (2) and a valve flap (3), wherein a flow passage is provided in the valve body (1), the valve seat (2) is fixedly mounted in the flow passage, and the valve flap (3) is slidably arranged in the valve body (1) to cooperate with the valve seat (2) to close or open the flow passage, characterized in that: The side wall of the valve body (1) is extended with an installation cavity (11), and the installation cavity (11) is provided with a piston cavity (4) at one end away from the valve body (1). A piston (5) is coaxially fixed to one end of the valve disc (3), and the piston (5) is slidably arranged in the piston cavity (4) to drive the valve disc (3) and the valve seat (2) to abut against each other to close the flow channel or to move away from each other to open the flow channel. The end of the piston cavity (4) away from the valve body (1) is provided with a through hole connected to the medium inlet channel or the atmosphere to inject medium into the upper cavity of the piston cavity (4) or to empty the upper cavity of the piston cavity (4). The cross-sectional area of ​​the piston (5) is larger than the cross-sectional area of ​​the valve disc (3).

2. The lift type stop valve according to claim 1, characterized in that: The piston (5) comprises a plug (51) and a plug rod (52), one end of the plug rod (52) is coaxially fixed to the valve disc (3), and the other end is coaxially fixed to the plug (51), the plug (51) is arranged in the piston cavity (4), and the side of the plug (51) is sealed with the cavity wall of the piston cavity (4), and the cross-sectional area of ​​the plug (51) is greater than the cross-sectional area of ​​the valve disc (3) and greater than the cross-sectional area of ​​the plug rod (52).

3. The lift type stop valve according to claim 2, characterized in that: A fixing seat (6) is coaxially fixed in the installation cavity (11); the fixing seat (6) is in the shape of a hollow cylinder and is coaxially embedded in the installation cavity (11); the piston cavity (4) is arranged at one end of the fixing seat (6) away from the valve seat (2).

4. The lift type stop valve according to claim 3, characterized in that: The valve seat (2) and the valve flap (3) are both made of ceramic material. The end of the fixed seat (6) abuts against the cross section of the valve seat (2) to fix the valve seat (2) in the valve body (1). A water-passing notch (61) is provided on the side wall of one end of the fixed seat (6) facing the valve seat (2). The water-passing notch (61) is communicated with the flow channel.

5. The lift type stop valve according to claim 4, characterized in that: The valve flap (3) comprises a guide cone (31) and a ceramic sealing disc (32), wherein a mounting post (311) is coaxially fixed to the flat end of the guide cone (31), and the mounting post (311) is coaxially threadedly fixed to the end of the plug rod (52). The ceramic sealing disc (32) is coaxially sleeved on the end of the plug rod (52), and the axial movement of the ceramic sealing disc (32) is limited by the cooperation between the flat end of the guide cone (31) and the end surface of the plug rod (52).

6. The lift type stop valve according to any one of claims 3 to 5, characterized in that: An annular groove is provided on the outer wall of the fixed seat (6) at one end away from the valve seat (2), and a sealing ring is embedded in the annular groove, so that the outer wall of the fixed seat (6) and the installation cavity (11) are sealed.

7. The lift type stop valve according to any one of claims 2 to 5, characterized in that: The plug block (51) and the plug rod (52) are both hollow structures, and the insides of the plug block (51) and the plug rod (52) are interconnected.

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