Knife gate valve with gate opening degree condition self-indicating function

Abstract

The utility model discloses a knife gate valve capable of indicating the opening degree condition of a gate opening automatically, which belongs to the technical field of valves and comprises a main valve body, and a knife switch is movably mounted at a valve port of the main valve body. The top of the main valve body is fixedly provided with a support, the top of the support is rotatably provided with a valve disc, and the center of the valve disc is provided with a screw fixedly connected with the knife switch; connecting pins are fixed on the two sides of the knife switch, indicating bolts are inserted into the connecting pins, and the indicating bolts are always located in indicating grooves formed in the front side face and the rear side face of the support; the total length of the indicating groove is equal to the diameter length of the valve port of the main valve body; when the indicating bolt is in contact with the bottom end of the indicating groove, the knife switch just closes the valve port; and when the indicating bolt is in contact with the top end of the indicating groove, the valve port is just completely opened by the knife switch. When the knife gate valve is applied, the opening degree condition of the gate opening at the moment can be known by observing the relative position of the indicating bolt and the indicating groove, and the knife gate valve is more suitable for being applied to occasions with high requirements for flow control precision.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a gate valve with an indicator of gate opening status. Background Technology

[0002] Knife gate valves, also known as knife gate valves, are a common regulating and shut-off device, often used to control the flow of fluids in pipelines, and are widely used in industries such as steel and metallurgy.

[0003] Among the existing patent documents, there is a patent with publication number CN 118757582 B entitled "A Knife Gate Valve". This patent and similar knife gate valves generally have a problem: although the existing knife gate valves can realize basic on and off functions, they cannot intuitively display the size of the gate opening. It is difficult for operators to accurately grasp the opening of the valve in real time. In some situations where the accuracy of flow control is required, this can easily lead to operational errors and affect production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a gate valve with a self-indicating gate opening status. When the gate valve is in use, the opening status of the gate can be understood by observing the relative position of the indicator pin and the indicator groove. It is more suitable for applications with high requirements for flow control accuracy.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A gate valve with an indicative gate opening status includes a main valve body, on which a vertically lifting gate is movably mounted; a support is fixedly mounted on the top of the main valve body, and a valve disc is rotatably mounted on the top of the support. A vertically arranged screw is threadedly fitted at the center of the valve disc, and the bottom end of the screw is fixedly connected to the top end of the gate.

[0007] The gate is fixed with connecting pins on both the front and rear sides outside the main valve body. An indicator pin is inserted into the connecting pin, and the indicator pin is always located in the indicator groove opened on the front and rear sides of the support.

[0008] The total length of the indicator groove is equal to the diameter of the valve port of the main valve body; when the indicator pin contacts the bottom end of the indicator groove, the gate will just close the valve port; when the indicator pin contacts the top end of the indicator groove, the gate will just fully open the valve port.

[0009] With the above solution, when the knife gate valve is used, the opening degree of the gate can be understood by observing the relative position of the indicator pin and the indicator groove. It is more suitable for applications with high requirements for flow control accuracy.

[0010] In a preferred embodiment of a gate valve with an indication of gate opening status, a bidirectional pointer is inserted through the end of the indication pin, and the bidirectional pointer is located outside the indication groove; indication scale lines are provided on both sides of the indication groove to cooperate with the bidirectional pointer; wherein, the indication scale lines indicate the gate opening status in percentage form.

[0011] Using the above scheme, in order to conveniently and accurately grasp the opening status of the gate, the opening status of the gate can be quickly grasped by reading the schematic scale line indicated by the bidirectional pointer.

[0012] As a preferred embodiment of a gate valve with self-indicating gate opening status, an alarm that can slide up and down is also installed on the front and rear sides of the support. The alarm is a buzzer with its own battery. The initial position of the alarm on the front side of the support is located at the top of the indicator groove, and the initial position of the alarm on the rear side of the support is located at the bottom of the indicator groove.

[0013] The switch part of the alarm is connected to two guide plates extending to its outside. When the alarm is raised, lowered and slid, the two guide plates can simultaneously contact the bidirectional pointer. Once the two guide plates contact the bidirectional pointer, the alarm will be triggered. The bidirectional pointer is a conductor, while the indicator pin is a non-conductor.

[0014] Using the above scheme, to better guide the staff, the staff can slide the alarm to the target position before rotating the valve disc. If it is necessary to open the valve to half size, only one of the alarms needs to be slid to the 50% indication mark. Then the staff rotates the valve disc, and the bidirectional pointer moves with the switch. Once the bidirectional pointer contacts the two guide plates, the alarm switch part forms a closed loop and triggers the alarm, which is indicated to the staff by sound.

[0015] In a preferred embodiment of a gate valve with an indication of gate opening status, the alarm is connected to slides on both sides. The slides are always located in the grooves opened on the support and located on both sides of the indication groove. The slides are equipped with set screws that can abut against the surface of the support and fix the slides.

[0016] Using the above method, in order to make the alarm slide, the set screw can be loosened before sliding, and the set screw can be tightened after the alarm reaches the target position.

[0017] After adopting the above technical solution, the beneficial effects of this utility model are:

[0018] 1. When using this knife gate valve, the opening degree of the gate can be understood by observing the relative position of the indicator pin and the indicator groove. It is more suitable for applications with high requirements for flow control accuracy.

[0019] 2. To easily and accurately grasp the opening degree of the gate, the opening degree of the gate can be quickly grasped by reading the indication scale line indicated by the bidirectional pointer;

[0020] 3. To better guide the operator, the operator can slide the alarm to the target position before rotating the valve disc. If it is necessary to open the valve to half size, simply slide one of the alarms to the 50% mark. Then, the operator rotates the valve disc, and the bidirectional pointer moves with the switch. Once the bidirectional pointer contacts the two guide plates, the alarm switch forms a closed loop and triggers the alarm, which is indicated to the operator by sound.

[0021] 4. To enable the alarm to slide, loosen the set screw before sliding. Once the alarm reaches the target position, tighten the set screw. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the present invention in Embodiment 1.

[0024] Figure 2 This is a perspective view of the three-dimensional structure of the present invention in Embodiment 1.

[0025] Figure 3 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 4 To showcase Figure 1 A three-dimensional structural diagram of the internal structure;

[0027] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0028] Figure 6 The main view is a perspective structural diagram of the present invention in Embodiment 2;

[0029] Figure 7 This is a rear-view perspective view of the three-dimensional structure of this utility model in Embodiment 2;

[0030] Figure 8 This is a top-view perspective view of the three-dimensional structure of this utility model in Embodiment 2;

[0031] Figure 9 for Figure 8 A magnified view of a section at point C.

[0032] The markings in the diagram are: 1-Main valve body; 2-Knife gate; 3-Support; 4-Valve disc; 5-Screw; 6-Connecting pin; 7-Illustrative pin; 8-Illustrative groove; 9-Bidirectional pointer; 10-Illustrative scale line; 11-Alarm; 12-Guide plate; 13-Slide seat; 14-Slide groove; 15-Setting screw. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1, as Figures 1 to 5 As shown, a gate valve with an indicative gate opening status includes a main valve body 1. A vertically movable gate 2 is movably installed at the valve port of the main valve body 1. A support 3 is fixedly installed on the top of the main valve body 1, and a valve disc 4 is rotatably installed on the top of the support 3. A vertically arranged screw 5 is threadedly fitted at the center of the valve disc 4, and the bottom end of the screw 5 is fixedly connected to the top end of the gate 2. Connecting pins 6 are welded and fixed on both the front and rear sides of the portion of the gate 2 outside the main valve body 1. An indicative pin 7 is inserted into the connecting pin 6. The indicative pin 7 is always located in the indicative groove 8 opened on the front and rear sides of the support 3. The total length of the indicative groove 8 is equal to the diameter of the valve port of the main valve body 1. When the indicative pin 7 contacts the bottom end of the indicative groove 8, the gate 2 closes the valve port. When the indicative pin 7 contacts the top end of the indicative groove 8, the gate 2 fully opens the valve port. When using this knife gate valve, the opening degree of the gate can be determined by observing the relative positions of the schematic pin 7 and the schematic groove 8. It is more suitable for applications requiring high accuracy in flow control.

[0035] like Figure 3 , Figure 5 As shown, a bidirectional pointer 9 is inserted through the end of the schematic pin 7, and the bidirectional pointer 9 is located outside the schematic slot 8; schematic scale lines 10 are respectively provided on both sides of the schematic slot 8 to cooperate with the bidirectional pointer 9; wherein, the schematic scale lines 10 indicate the opening degree of the gate in percentage form. In order to conveniently and accurately grasp the opening degree of the gate, the opening degree of the gate can be quickly grasped by reading the schematic scale line 10 indicated by the bidirectional pointer 9.

[0036] The working principle of this utility model in Embodiment 1:

[0037] When used in applications requiring high flow control accuracy, operators rotate the gate disc, which in turn drives the screw 5 to rise or fall, thereby opening or closing the gate 2. By observing the relative position of the indicator pin 7 and the indicator slot 8, and by reading the indicator scale line 10 indicated by the bidirectional pointer 9, operators can quickly grasp the opening status of the gate. This method is both convenient and efficient in application.

[0038] Example 2, as Figures 6 to 9 As shown, this embodiment is based on embodiment one, and an alarm 11 that can slide up and down is installed on the front and rear sides of the support 3 in embodiment one. The alarm 11 is a buzzer with its own battery. The initial position of the alarm 11 on the front side of the support 3 is located at the top of the indicated groove 8, and the initial position of the alarm 11 on the rear side of the support 3 is located at the bottom of the indicated groove 8. The switch part of the alarm 11 is connected to two guide plates 12 extending to its outside. When the alarm 11 slides up and down, the two guide plates 12 can simultaneously contact the bidirectional pointer 9. Once the two guide plates 12 contact the bidirectional pointer 9, the alarm 11 will be triggered. The bidirectional pointer 9 is a conductor, while the indicated pin 7 is a non-conductor. To better guide the operator, the operator can slide the alarm 11 to the target position before rotating the valve disc 4. If it is necessary to open the valve to half size, only one of the alarms 11 needs to be slid to the 50% indication mark 10. Then the operator rotates the valve disc 4, and the bidirectional pointer 9 moves with the switch 2. Once the bidirectional pointer 9 contacts the two guide plates 12, the switch part of the alarm 11 forms a closed loop and triggers the alarm 11 to sound. The alarm is indicated to the operator by sound.

[0039] like Figure 9 As shown, the alarm 11 has slides 13 connected to both sides. The slides 13 are always located in the grooves 14 opened on the support 3 and located on both sides of the illustrated groove 8. The slides 13 are equipped with set screws 15 that can abut against the surface of the support 3 and fix the slides 13. In order to make the alarm 11 slide, the set screws 15 can be loosened before sliding. After the alarm 11 reaches the target position, the set screws 15 can be tightened.

[0040] The working principle of this utility model in Embodiment 2:

[0041] When used in applications requiring high flow control accuracy, the operator rotates the gate disc, which in turn drives the screw 5 to rise or fall under the action of the thread, thereby opening or closing the gate 2.

[0042] In practical applications, if it is necessary to adjust the valve opening from 0% to the 50% scale line 10, the alarm 11 located at the top of the indicator groove 8 on the front side of the support 3 should be lowered to the 50% scale line 10 beforehand. Then, the operator rotates the valve disc 4, and the bidirectional pointer 9 moves with the switch 2. Once the bidirectional pointer 9 contacts the two guide plates 12, the switch part of the alarm 11 forms a closed loop and triggers the alarm 11 to sound an alarm, indicating to the operator that the 50% scale line 10 has been reached.

[0043] If it is necessary to adjust the valve opening from 100% to the 50% indicator mark 10, first slide the alarm 11 located at the bottom of the indicator groove 8 behind the support 3 up to the 50% indicator mark 10. Then, the operator rotates the valve disc 4, and the bidirectional pointer 9 moves with the switch 2. Once the bidirectional pointer 9 contacts the two guide plates 12, the switch part of the alarm 11 forms a closed loop and triggers the alarm 11 to sound an alarm, indicating to the operator that the 50% indicator mark 10 has been reached.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gate valve with self-indicating gate opening status, comprising a main valve body, wherein a vertically lifting gate is movably installed at the valve port of the main valve body; a support is fixedly installed on the top of the main valve body, and a valve disc is rotatably installed on the top of the support; a vertically arranged screw is threadedly fitted at the center of the valve disc, and the bottom end of the screw is fixedly connected to the top end of the gate. Its features are: The gate is fixed with connecting pins on both the front and rear sides of the part outside the main valve body. An indicator pin is inserted into the connecting pin. The indicator pin is always located in the indicator groove opened on the front and rear sides of the support. The total length of the indicated groove is equal to the diameter of the valve port of the main valve body; when the indicated pin contacts the bottom end of the indicated groove, the gate will just close the valve port; when the indicated pin contacts the top end of the indicated groove, the gate will just fully open the valve port.

2. The gate opening status self-indicating knife gate valve according to claim 1, characterized in that: A bidirectional pointer is inserted through the end of the indicator pin, and the bidirectional pointer is located outside the indicator slot; the two sides of the indicator slot are respectively provided with indicator scale lines for use with the bidirectional pointer.

3. The gate opening status self-indicating knife gate valve according to claim 2, characterized in that: The indicated scale lines use percentages to indicate the opening degree of the gate.

4. The gate opening status self-indicating knife gate valve according to claim 3, characterized in that: The support is also equipped with an alarm that can slide up and down on both the front and rear sides; the initial position of the alarm on the front side of the support is located at the top of the indicated groove, and the initial position of the alarm on the rear side of the support is located at the bottom of the indicated groove.

5. The gate opening status self-indicating knife gate valve according to claim 4, characterized in that: The switch part of the alarm is connected to two guide plates extending to its outside. When the alarm is raised, lowered and slid, the two guide plates can simultaneously contact the bidirectional pointer. Once the two guide plates contact the bidirectional pointer, the alarm will be triggered.

6. The gate opening status self-indicating knife gate valve according to claim 5, characterized in that: The bidirectional pointer is a conductor, while the illustrative pin is a non-conductor.

7. The gate opening status self-indicating knife gate valve according to claim 6, characterized in that: The alarm is a buzzer with its own battery.

8. The gate opening status self-indicating knife gate valve according to claim 7, characterized in that: The alarm is connected to slides on both sides. The slides are always located in the grooves opened on the support and located on both sides of the indicated groove. The slides are equipped with set screws that can abut against the surface of the support and fix the slides.

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