Pneumatic elevator control valve

Abstract

The utility model discloses a pneumatic elevator control valve, which relates to the technical field of elevator parts and comprises a valve casing, openings are arranged at the upper end and the lower end of the valve casing, a control seat is fixedly connected to the middle of the valve casing, two air inlets are arranged on the control seat in a penetrating manner, and a one-way air inlet regulation and control unit positioned above the control seat is mounted at the air inlets. Two exhaust ports are further formed in the control base in a penetrating mode, one-way exhaust regulation and control units located below the control base are installed at the positions where the exhaust ports are located, and the one-way air inlet regulation and control unit or the one-way exhaust regulation and control unit comprises one-way air valve assemblies and air valve regulation and control mechanisms. The opening / closing state of the one-way air valve assembly can be regulated and controlled through the air valve regulation and control mechanism, and the one-way air valve assembly can be directly controlled to be completely closed through the air valve regulation and control mechanism, so that the anti-falling effect is achieved, and the safety of the pneumatic elevator is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoist components, in particular to a pneumatic hoist control valve. Background Art

[0002] Pneumatic hoist is a kind of lifting equipment driven by pneumatic force. It is usually driven by compressed air through a cylinder or piston to push the lifting platform up and down. Pneumatic hoist can be widely used in different industries, such as mining, etc. It has the characteristics of simple structure, low maintenance cost, safety and reliability.

[0003] Among the existing patent documents, there is a patent with publication number CN 216235803 U and the name of "A compact pneumatic hoist". This patent mainly drives the lifting and lowering by a cylinder, and the air intake of the cylinder is directly controlled by an air pump. Due to the lack of a control valve between the cylinder and the air pump, once the air pump is damaged, it will directly lead to air leakage in the cylinder. At this time, the hoist is prone to the risk of falling, which will affect the safety of the hoist. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pneumatic hoist control valve, which can adjust the open / closed state of a one-way air valve assembly by utilizing an air valve regulating mechanism, and can directly control the one-way air valve assembly to be completely closed by the air valve regulating mechanism, thereby achieving an anti-fall effect and thus realizing the safety of the pneumatic hoist.

[0005] In order to solve the above technical problems, the technical solution of the utility model is implemented as follows:

[0006] A pneumatic lift control valve comprises a valve housing, wherein both upper and lower ends of the valve housing are provided with openings, a control seat is fixedly connected to the middle of the valve housing, two air inlets are provided through the control seat and are symmetrical about the center of the control seat, a one-way air inlet control unit is installed at the air inlets and is located above the control seat, and two exhaust ports are provided through the control seat and are symmetrical about the center of the control seat, and a one-way exhaust control unit is installed at the exhaust ports and is located below the control seat;

[0007] The one-way air intake control unit or the one-way air exhaust control unit includes two sets of one-way air valve assemblies and an air valve control mechanism;

[0008] The one-way air valve assembly includes a valve cover, which is located at the location of the air inlet or the exhaust port. A plurality of side ears distributed in a circumferential array are fixed on the side wall of the valve cover. The side ears are slidably connected to a guide shaft fixed to a control seat. The guide shaft includes a guide shaft 1 and a guide shaft 2. The guide shaft 2 is only provided at one location, and the other locations are all guide shafts 2. A spring is sleeved on the guide shaft 1 to push the side ears to move toward the location of the air inlet or the exhaust port.

[0009] The air valve control mechanism includes a driving motor, a screw rod is connected to the rotating shaft of the driving motor, and a control seat is fitted on the rod body of the screw rod through a thread. Both ends of the control seat are mounted on the guide shaft, and the control seat can prevent the side ear from sliding in a direction away from the air inlet or exhaust port.

[0010] By adopting this solution, the pneumatic hoist control valve can adjust the open / closed state of the one-way air valve assembly using the air valve control mechanism. The one-way air valve assembly can be directly controlled to be completely closed through the air valve control mechanism to achieve an anti-fall effect, thereby ensuring the safety of the pneumatic hoist.

[0011] As a preferred implementation of a pneumatic lift control valve, the spring is sleeved on the first guide shaft, and the regulating seat is sleeved on the second guide shaft.

[0012] By adopting this scheme, in order to achieve the rebound and blocking of the valve cover, a spring is arranged on the guide shaft one, and the side ear is pushed by the spring to achieve the rebound and reset of the valve cover; by linking the regulating seat with the guide shaft two, the valve cover can be blocked by the regulating seat when sliding along the guide shaft two, so as to adjust the size of the valve cover opening, thereby changing the flow rate of the intake or exhaust, so as to improve the flexibility of use.

[0013] As a preferred embodiment of a pneumatic lift control valve, a valve core is fixed to the side of the valve cover facing the air inlet or exhaust port, and the valve core can block the air inlet or exhaust port; wherein the diameter of the air inlet is equal to the diameter of the exhaust port; the diameter of the valve cover is larger than the diameter of the air inlet or exhaust port, and the diameter of the valve core is equal to the diameter of the air inlet or exhaust port.

[0014] With this solution, in order to further improve the sealing performance, a valve core is provided on the valve cover, and the valve core can completely block the air inlet or exhaust port, thereby improving the sealing performance of the air inlet or exhaust port.

[0015] As a preferred embodiment of a pneumatic lift control valve, the air valve control mechanism also includes a motor frame, the motor frame is fixed to the control seat, and the drive motor is fixed on the motor frame and faces the control seat; wherein, an avoidance groove is opened on the side wall of the motor frame, the control seat is located in the avoidance groove, and the total length of the avoidance groove is greater than the total length of the screw rod.

[0016] This solution is adopted to fix the drive motor by setting up a motor frame in order to improve the stability and reliability of the motor frame.

[0017] As a preferred implementation of a pneumatic lift control valve, washers are fixed to the upper and lower surfaces of both ends of the regulating seat.

[0018] With this solution, in order to reduce the impact between the regulating seat and the side ears, a gasket is provided to reduce the impact force generated during contact.

[0019] As a preferred implementation of a pneumatic lift control valve, the drive motor is electrically connected to a single chip microcomputer for controlling the operation of the drive motor.

[0020] By adopting this scheme, in order to realize the control of the drive motor, a single-chip microcomputer is set up, and a program for controlling the operation of the drive motor is stored in the single-chip microcomputer. When the single-chip microcomputer controls the drive motor to rotate clockwise, the screw rod also rotates clockwise synchronously, which can drive the control seat to slide toward the air inlet or exhaust port; when the single-chip microcomputer controls the drive motor to rotate counterclockwise, the screw rod also rotates counterclockwise synchronously, which can drive the control seat to slide away from the air inlet or exhaust port.

[0021] After adopting the above technical solution, the beneficial effects of the utility model are:

[0022] 1. The pneumatic hoist control valve can adjust the open / close state of the one-way air valve assembly by using the air valve regulating mechanism. The one-way air valve assembly can be directly controlled to be completely closed by the air valve regulating mechanism, so as to achieve the anti-fall effect, thereby realizing the safety of the pneumatic hoist.

[0023] 2. In order to realize the rebound and blocking of the valve cover, a spring is arranged on the guide shaft 1, and the side ear is pushed by the spring to realize the rebound and reset of the valve cover; by linking the regulating seat with the guide shaft 2, the valve cover can be blocked by the regulating seat when sliding along the guide shaft 2, so as to adjust the size of the valve cover opening, thereby changing the flow rate of intake or exhaust, so as to improve the flexibility of use.

[0024] 3. In order to further improve the sealing performance, a valve core is arranged on the valve cover, and the valve core can completely block the air inlet or exhaust port, thereby improving the sealing performance of the air inlet or exhaust port.

[0025] 4. In order to realize the control of the drive motor, a single-chip microcomputer is set up, and a program for controlling the operation of the drive motor is stored in the single-chip microcomputer. When the single-chip microcomputer controls the drive motor to rotate clockwise, the screw rod also rotates clockwise synchronously, which can drive the control seat to slide toward the air inlet or exhaust port; when the single-chip microcomputer controls the drive motor to rotate counterclockwise, the screw rod also rotates counterclockwise synchronously, which can drive the control seat to slide away from the air inlet or exhaust port. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a three-dimensional structural diagram of the utility model when viewed from above;

[0028] Figure 2 It is a three-dimensional structural diagram of the utility model when viewed from above;

[0029] Figure 3 for Figure 1 An internal cross-sectional view showing the location of the one-way air intake control unit or the one-way exhaust control unit;

[0030] Figure 4 for Figure 3 State diagram of the one-way air intake control unit during mid-intake;

[0031] Figure 5 for Figure 3 State diagram of the one-way exhaust control unit during mid-exhaust;

[0032] Figure 6 for Figure 3 A three-dimensional structural diagram of the one-way air intake control unit;

[0033] Figure 7 for Figure 4 A three-dimensional structural diagram of the one-way air intake control unit;

[0034] Figure 8 for Figure 6 A cross-sectional view showing the internal structure of the motor frame;

[0035] Fig. 9 for Figure 7 A cross-sectional view showing the internal structure of the motor frame;

[0036] Fig.10 for Fig. 9 A three-dimensional structural diagram of the middle group one-way air valve assembly;

[0037] Fig.11 for Fig. 9 Three-dimensional structural diagram of the central gas valve control mechanism.

[0038] In the figure: 1-valve housing; 2-control seat; 3-air inlet; 4-one-way air inlet control unit; 5-exhaust port; 6-one-way exhaust control unit; 7-one-way air valve assembly; 701-valve cover; 702-side ear; 703-guide shaft one; 704-spring; 705-guide shaft two; 706-valve core; 8-air valve control mechanism; 801-drive motor; 802-screw rod; 803-control seat; 804-motor frame; 805-avoidance groove; 806-gasket; 807-single chip microcomputer. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] like Figures 1 to 11 As shown, a pneumatic lift control valve comprises a valve housing 1, the upper and lower ends of the valve housing 1 are provided with openings, a control seat 2 is fixedly connected to the middle of the valve housing 1, two air inlets 3 are opened through the control seat 2 and are symmetrical about the center of the control seat 2, a one-way air inlet control unit 4 located above the control seat 2 is installed at the air inlet 3, and two exhaust ports 5 are opened through the control seat 2 and are symmetrical about the center of the control seat 2, and a one-way exhaust control unit 6 located below the control seat 2 is installed at the exhaust port 5;

[0041] The one-way air intake control unit 4 or the one-way air exhaust control unit 6 includes two sets of one-way air valve assemblies 7 and an air valve control mechanism 8;

[0042] The one-way air valve assembly 7 includes a valve cover 701, which is located at the location of the air inlet 3 or the exhaust port 5. Four side ears 702 distributed in a circumferential array are fixed on the side wall of the valve cover 701. The side ears 702 are slidably connected to a guide shaft fixed to the control seat 2. The guide shaft includes a guide shaft 1 703 and a guide shaft 2 705. The guide shaft 2 705 is only provided at one location, and the other locations are guide shafts 2 705. A spring 704 is sleeved on the guide shaft 1 703 to push the side ears 702 to move toward the location of the air inlet 3 or the exhaust port 5.

[0043] The air valve control mechanism 8 includes a driving motor 801, a screw rod 802 is connected to the rotating shaft of the driving motor 801, and a control seat 803 is threadedly fitted on the rod body of the screw rod 802. Both ends of the control seat 803 are mounted on the guide shaft. The control seat 803 can prevent the side ear 702 from sliding in a direction away from the air inlet 3 or the exhaust port 5.

[0044] The pneumatic hoist control valve utilizes the air valve regulating mechanism 8 to regulate the on / off state of the one-way air valve assembly 7, and the air valve regulating mechanism 8 can directly control the one-way air valve assembly 7 to be completely closed, thereby achieving an anti-fall effect, thereby realizing the safety of the pneumatic hoist.

[0045] like Fig.10 As shown, the spring 704 is mounted on the guide shaft 1 703 , and the regulating seat 803 is mounted on the guide shaft 2 705 .

[0046] In order to achieve the rebound and blocking of the valve cover 701, a spring 704 is arranged on the guide shaft 1 703, and the spring 704 pushes the side ear 702 to achieve the rebound and reset of the valve cover 701; by linking the regulating seat 803 with the guide shaft 2 705, the valve cover 701 can be blocked by the regulating seat 803 when sliding along the guide shaft 2 705, so as to adjust the size of the opening of the valve cover 701, thereby changing the flow rate of the intake or exhaust, so as to improve the flexibility of use.

[0047] like Fig.10 As shown, a valve core 706 is also fixed to the side of the valve cover 701 facing the air inlet 3 or the exhaust port 5, and the valve core 706 can block the air inlet 3 or the exhaust port 5; wherein the diameter of the air inlet 3 is equal to the diameter of the exhaust port 5; the diameter of the valve cover 701 is larger than the diameter of the air inlet 3 or the exhaust port 5, and the diameter of the valve core 706 is equal to the diameter of the air inlet 3 or the exhaust port 5.

[0048] In order to further improve the sealing performance, a valve core 706 is provided on the valve cover 701 , and the valve core 706 can completely block the air inlet 3 or the exhaust port 5 , thereby improving the sealing performance of the air inlet 3 or the exhaust port 5 .

[0049] like Fig.11 As shown, the air valve control mechanism 8 also includes a motor frame 804, the motor frame 804 is fixed to the control seat 2, and the drive motor 801 is fixed on the motor frame 804 and faces the control seat 2; wherein, an avoidance groove 805 is opened on the side wall of the motor frame 804, and the control seat 803 is located in the avoidance groove 805, and the total length of the avoidance groove 805 is greater than the total length of the screw rod 802.

[0050] In order to improve the stability and reliability of the motor frame 804 , the driving motor 801 is fixed by setting the motor frame 804 .

[0051] like Fig.11 As shown, washers 806 are fixed to the upper and lower surfaces of both ends of the regulating seat 803.

[0052] In order to reduce the impact between the regulating seat 803 and the side ear 702, a gasket 806 is provided to reduce the impact force generated during contact.

[0053] like Fig.11 As shown, the driving motor 801 is electrically connected to a single chip microcomputer 807 for controlling the operation of the driving motor 801 .

[0054] In order to realize the control of the driving motor 801, a single chip computer 807 is set up, and a program for controlling the operation of the driving motor 801 is stored in the single chip computer 807. When the driving motor 801 is controlled by the single chip computer 807 to rotate clockwise, the screw rod 802 also rotates clockwise synchronously, which can drive the regulating seat 803 to slide toward the air inlet 3 or the exhaust port 5; when the driving motor 801 is controlled by the single chip computer 807 to rotate counterclockwise, the screw rod 802 also rotates counterclockwise synchronously, which can drive the regulating seat 803 to slide away from the air inlet 3 or the exhaust port 5.

[0055] The working principle of this utility model:

[0056] When in use, the top of the valve housing 1 is butted against the cylinder seal, and the bottom of the valve housing 1 is butted against the air pump seal.

[0057] When the hoist is lifted, the air pump supplies air to the cylinder. When passing through the pneumatic hoist control valve, it pushes the valve cover 701 at the air inlet 3 to open, and then the air enters the cylinder from the air inlet 3. Figure 4 As shown; when the hoist is descending, the air pump supplies air to the cylinder, and when passing through the pneumatic hoist control valve, it will push the valve cover 701 where the exhaust port 5 is located to open, and then the air is discharged from the exhaust port 5, as shown Figure 5 shown.

[0058] When the air pump is damaged, the one-way exhaust control unit 6 can be controlled to block the exhaust port 5. The single-chip computer 807 controls the shaft of the drive motor 801 to rotate clockwise, and the screw rod 802 also rotates clockwise synchronously, which can drive the control seat 803 to slide toward the air inlet 3 or the exhaust port 5 until the control seat 803 completely contacts the side ear 702. At this time, the valve cover 701 at the exhaust port 5 cannot be opened, and the air in the cylinder cannot be discharged, thereby achieving an anti-fall effect and ensuring the safety of the pneumatic hoist.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic lift control valve, comprising a valve housing (1), wherein both upper and lower ends of the valve housing (1) are provided with openings, a control seat (2) is fixedly connected to the middle of the valve housing (1), two air inlets (3) are provided through the control seat (2) and are symmetrical with respect to the center of the control seat (2), a one-way air inlet control unit (4) located above the control seat (2) is installed at the location of the air inlet (3), and two air outlets (5) are provided through the control seat (2) and are symmetrical with respect to the center of the control seat (2), and a one-way air outlet control unit (6) located below the control seat (2) is installed at the location of the air outlet (5); Features: The one-way air intake control unit (4) or the one-way air exhaust control unit (6) both include two sets of one-way air valve assemblies (7) and an air valve control mechanism (8); The one-way air valve assembly (7) comprises a valve cover (701), the valve cover (701) is located at the location of the air inlet (3) or the air outlet (5), a plurality of side ears (702) distributed in a circumferential array are fixed on the side wall of the valve cover (701), the side ears (702) are slidably connected to a guide shaft fixed to the control seat (2), the guide shaft comprises a guide shaft 1 (703) and a guide shaft 2 (705), the guide shaft 2 (705) is only provided at one location, and the other locations are all guide shaft 2 (705), and a spring (704) is sleeved on the guide shaft 1 (703) for pushing the side ears (702) to move toward the location of the air inlet (3) or the air outlet (5); The air valve control mechanism (8) comprises a driving motor (801), a screw rod (802) is connected to the rotating shaft of the driving motor (801), a control seat (803) is provided on the rod body of the screw rod (802) through a thread, and both ends of the control seat (803) are mounted on the guide shaft, and the control seat (803) can prevent the side ear (702) from sliding in a direction away from the air inlet (3) or the exhaust port (5).

2. The pneumatic lift control valve according to claim 1, characterized in that: The spring (704) is sleeved on the guide shaft 1 (703), and the regulating seat (803) is sleeved on the guide shaft 2 (705).

3. The pneumatic lift control valve according to claim 1, characterized in that: A valve core (706) is also fixed to the side of the valve cover (701) facing the air inlet (3) or the air outlet (5), and the valve core (706) is capable of blocking the air inlet (3) or the air outlet (5).

4. The pneumatic lift control valve according to claim 3, characterized in that: The diameter of the air inlet (3) is equal to the diameter of the air outlet (5).

5. The pneumatic lift control valve according to claim 4, characterized in that: The diameter of the valve cover (701) is greater than the diameter of the air inlet (3) or the air outlet (5), and the diameter of the valve core (706) is equal to the diameter of the air inlet (3) or the air outlet (5).

6. The pneumatic lift control valve according to claim 1, characterized in that: The gas valve control mechanism (8) further comprises a motor frame (804), wherein the motor frame (804) is fixed to the control seat (2), and the drive motor (801) is fixed to the motor frame (804) and faces the location of the control seat (2).

7. The pneumatic lift control valve according to claim 6, characterized in that: An avoidance groove (805) is provided on the side wall of the motor frame (804), the regulating seat (803) is located in the avoidance groove (805), and the total length of the avoidance groove (805) is greater than the total length of the lead screw (802).

8. The pneumatic lift control valve according to claim 7, characterized in that: Washers (806) are fixed to the upper and lower surfaces of both ends of the regulating seat (803).

9. The pneumatic lift control valve according to any one of claims 1 to 8, characterized in that: The drive motor (801) is electrically connected to a single chip computer (807) for controlling the operation of the drive motor (801).

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