A negative pressure regulator mode switch with linkage control

Abstract

The application discloses a negative pressure regulator working mode switch with linkage control, which comprises a valve body, a slide valve, a sealing gasket, a slide valve pressing plate, and an elastic pressure loading assembly. The slide valve can rotate around the shaft center of the valve body, and a three-position five-way torsional slide valve structure is formed between the slide valve and the valve body. The three-position five-way torsional slide valve structure comprises three positions, namely, a closing position, an adjusting position and a straight-through position, and five ways, namely, an air inlet, an adjusting port, a straight-through port, a control port and an emptying port. When the three-position five-way torsional slide valve structure is in the closing state, the control port is closed. When the three-position five-way torsional slide valve structure is in the non-closing state, the control port is connected with the emptying port. The closing and emptying states of the control port can be used for controlling the switch of an external negative pressure generator and work in linkage. The scheme can realize linkage control of the external negative pressure generator, so that the negative pressure generator and the medical negative pressure regulator can work synchronously, and the whole has high stability and reliability and flexible operation.

Description

Technical Field

[0001] This invention relates to a negative pressure regulator, and more specifically to a working mode switch on a negative pressure regulator. Background Technology

[0002] In the field of medical negative pressure aspiration surgery, negative pressure is used as the driving force for surgical suction to remove waste fluids during the procedure. Medical negative pressure aspiration surgery requires a negative pressure regulator to control the suction force, ensuring convenient operation and safe use.

[0003] See Figure 1 and Figure 2 To ensure ease of use, convenient operation, and safe use, high-performance medical negative pressure regulators are equipped with a working mode switch 110. For example... Figure 2 As shown, the existing operating mode switch is a three-position, three-way planar torsion valve structure with three operating modes:

[0004] 1. OFF mode – Turn off the instruments promptly after the surgery;

[0005] 2. REG Adjustment Working Mode - Normal operating mode: The negative pressure regulating valve is set to the suction pressure according to the specified method, and then negative pressure suction is performed at the set negative pressure value.

[0006] 3. FULL or MAX direct-through or maximum negative pressure working mode - the input negative pressure is directly applied without adjustment, and the output negative pressure value is the maximum negative pressure value, which is used for large-flow suction in emergency situations.

[0007] In practical applications, existing medical negative pressure regulators utilize two types of negative pressure sources for suction: the first is a tubular negative pressure source provided by a medical central suction system, and the second, when a tubular negative pressure source is unavailable, utilizes compressed gas 120 to drive an external negative pressure source generated by a negative pressure generator 130. The negative pressure source is connected to the negative pressure suction device, which then performs the suction procedure.

[0008] Because the current medical negative pressure regulator's operating mode switch 110 lacks linkage control, when using a negative pressure generator as the negative pressure source, the generator cannot be linked to the regulator's operating mode switch to switch on and off simultaneously. Therefore, the negative pressure generator must be manually activated via manual switch 140 to provide a negative pressure source for the regulator; otherwise, it will not operate. Alternatively, when the regulator stops working, the generator must also be manually deactivated; otherwise, it will remain on, wasting driving compressed gas. This is particularly inconvenient in emergency situations, requiring both the regulator and generator to be activated simultaneously, and also leads to wasted driving gas.

[0009] Further integration Figure 3 As shown, the existing operating mode switch is a three-position, three-way planar torsion valve structure. The sealing of the planar valve relies on the clamping control between the planar valve 111 and the valve pressure plate 112. The clamping of the existing operating mode switch lacks elasticity, and the degree of clamping is entirely controlled by the precision of the machining dimensions. However, in reality, machining dimensions have tolerances, making it difficult to guarantee the consistency of the operating mode switch's clamping. If the operating mode switch is clamped too tightly, the switch operation becomes inflexible; if the operating mode switch is clamped too loosely, the switch cannot seal, causing leakage and affecting the performance of the negative pressure regulator. Summary of the Invention

[0010] In view of the problems existing in the operation and reliability of the working mode switch of the existing medical negative pressure regulator, the purpose of this invention is to provide a working mode switch of the negative pressure regulator with linkage control, which can realize linkage control of the external negative pressure generator, so that it works synchronously with the medical negative pressure regulator, while having high overall stability and reliability, and flexible operation.

[0011] To achieve the above objectives, the present invention provides a negative pressure regulator operating mode switch with linkage control, comprising a valve body and a slide valve, and further comprising a sealing gasket, a slide valve pressure plate, and an elastic pressure loading assembly. The valve body is provided with a sealing gasket, which is non-rotatable relative to the valve body. The slide valve is rotatably mounted on the valve body and abuts against the sealing gasket. The slide valve pressure plate is mounted on the slide valve. The elastic pressure loading assembly is connected to the valve body and elastically abuts against the slide valve pressure plate, enabling the application of an elastic clamping force facing the valve body to the slide valve pressure plate, thereby causing the slide valve and the sealing gasket to sequentially press against the valve body.

[0012] The slide valve can rotate around the axis of the valve body, forming a three-position five-way torsion slide valve structure with the valve body. The three-position five-way torsion slide valve structure includes three positions: closed, regulating, and straight-through, as well as five ports: air inlet, regulating port, straight-through port, control port, and vent port. When the three-position five-way torsion slide valve structure is in the closed state, the control port is closed. When the three-position five-way torsion slide valve structure is in the open state, the control port is connected to the vent port. The closed and vent states of the control port can be used to externally control the negative pressure generator switch and work in conjunction with it.

[0013] Furthermore, the valve body is provided with an inlet hole, a straight outlet hole, an adjustable outlet hole, a control port hole, and an vent hole. The inlet hole, the straight outlet hole, and the adjustable outlet hole are respectively connected to the corresponding external inlet and outlet holes. The control port hole is connected to the corresponding external control port. The vent hole hole is connected to the atmosphere.

[0014] Furthermore, the slide valve has two sets of concave waist-shaped flow channels on its bottom surface facing the valve body. The positions of the two sets of concave waist-shaped flow channels match the positions of the inlet hole, the straight outlet hole, and the regulating outlet hole on the valve body. In the corresponding working mode position, the air inlet is connected to the straight outlet hole or the regulating outlet hole respectively. The bottom surface of the slide valve is provided with an exhaust hole that matches the control port hole on the valve body.

[0015] Furthermore, the slide valve pressure plate is provided with several vent holes.

[0016] Furthermore, the elastic pressure loading assembly is composed of a spring, a spring cover, and a screw. The spring is mounted on the spring cover, and the screw passes through the spring cover for connecting to the valve body.

[0017] Furthermore, a number of elastic positioning components are provided between the slide valve and the slide valve pressure plate.

[0018] Furthermore, the elastic positioning component is composed of a steel ball and a small spring.

[0019] The negative pressure regulator working mode switch with linkage control provided by this invention adopts a three-position five-way planar torsion slide valve structure and innovatively adds an inlet and outlet for switch linkage control, so that when an external negative pressure generator is used as the negative pressure source, the medical negative pressure regulator switch can simultaneously remotely control the switch of the matching dedicated negative pressure generator, so that it works synchronously with the medical negative pressure regulator.

[0020] Furthermore, the working mode switch of this negative pressure regulator effectively improves the clamping method of the working mode switch, increases elasticity, and realizes a slide valve structure that relies entirely on elastic clamping. This overcomes the drawbacks caused by dimensional accuracy errors, making the working mode switch more flexible in operation and providing better sealing. The sealing gasket positioning method has been changed, making the sealing gasket positioning more reliable and allowing for a larger slide valve passage. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 Here is a structural example diagram of an existing negative pressure regulator;

[0023] Figure 2 This is a schematic diagram illustrating the working mode switch in an existing negative pressure regulator.

[0024] Figure 3 An exploded example diagram of a planar slide valve in an existing operating mode switch;

[0025] Figure 4 This is a schematic diagram illustrating the principle of the three-position five-way torsion valve structure in the negative pressure regulator working mode switch of this invention.

[0026] Figure 5This is an assembly example diagram of the negative pressure regulator working mode switch in this invention;

[0027] Figure 6 This is an exploded view of the working mode switch of the negative pressure regulator in this invention;

[0028] Figure 7 This is a structural example diagram of the valve body in this invention;

[0029] Figure 8 This is a structural example diagram of the sealing gasket in this invention;

[0030] Figure 9 This is a structural example diagram of the bottom surface of the sealing gasket in this invention;

[0031] Figure 10 This is an example diagram of the bottom structure of the slide valve in this invention;

[0032] Figure 11 This is an example diagram of the back structure of the slide valve in this invention;

[0033] Figure 12 This is an example diagram of the bottom structure of the slide valve pressure plate in this invention;

[0034] Figure 13 This is an example diagram of the back structure of the slide valve pressure plate in this invention;

[0035] Figure 14 This is an example of the slide valve being in the OFF closed working mode position in this invention, along with its corresponding schematic diagram.

[0036] Figure 15 This is an example of the slide valve being in the REG adjustment mode position in this invention, along with its corresponding schematic diagram;

[0037] Figure 16 This is an example of the slide valve being in the FULL straight-through mode position in this invention, along with its corresponding schematic diagram;

[0038] Figure 17 This is an example diagram illustrating the application structure of the negative pressure regulator operating mode switch in this invention;

[0039] Figure 18 This is a schematic diagram illustrating the working mode switch of the negative pressure regulator in this invention. Detailed Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0041] The negative pressure regulator operating mode switch with linkage control provided in this invention adopts a three-position five-way torsion valve structure. Compared with the existing three-position three-way planar torsion valve structure, it innovatively introduces two sets of control channels: one channel is the control port, and the other channel is the vent port, thus forming five channels: air inlet, regulating port, straight-through port, control port, and vent port. Simultaneously, it forms three operating positions: OFF, REG, and FULL. Figure 4 As shown. Based on this, when the working mode switch of this negative pressure regulator is in the OFF position, the control port is closed; in other positions, the control port is connected to the corresponding vent port to release air; thus, the switch of the matching negative pressure generator can be controlled by a single pipeline, so that the negative pressure generator can work in conjunction with the switch.

[0042] See Figure 5 and Figure 6 The above describes an example configuration of a working mode switch for a negative pressure regulator with linkage control, as provided by the present invention.

[0043] As shown in the figure, the working mode switch (11) of the negative pressure regulator given in this example is mainly composed of valve body (1), sealing gasket (2), sealing ring (3), slide valve (4), slide valve pressure plate (5), spring (6), spring cover (7), screw (8), steel ball (9), and small spring (10) working together.

[0044] Among them, the sealing gasket (2) is placed on the valve body (1), and the sealing gasket (2) and the valve body (1) form a circumferential rotation limit. The sealing gasket (2) is not rotatable relative to the valve body (1); the slide valve (4) is placed on the valve body (1) and cooperates with the sealing gasket (2) on the valve body (1), and is rotatable relative to the sealing gasket (2); the sealing gasket (2) is set between the slide valve (4) and the valve body (1).

[0045] The slide valve pressure plate (5) is set in conjunction with the slide valve (4), and an elastic positioning component consisting of a steel ball (9) and a small spring (10) is set between the two;

[0046] The spring (6), spring cover (7) and screw (8) work together to form an elastic pressure loading assembly, and pass through the slide valve pressure plate (5), slide valve (4) and valve body (1) in sequence to connect them. The slide valve pressure plate (5) can be applied to the slide valve (4) with an elastic clamping force, so that the slide valve pressure plate (5), slide valve (4) and sealing gasket (2) are pressed together on the valve body (1) in sequence to form an integral structure.

[0047] For details, see Figure 7In this example, the valve body (1) is a block with a frustum (1-10) on the top. A spindle (1-1) is erected at the center of the frustum (1-10). A screw hole (1-11) is provided at the center of the spindle. An annular concave plane (1-2) is provided between the spindle (1-1) and the outer periphery of the frustum. Both the inner and outer edges of the annular concave plane (1-2) have flanges.

[0048] Furthermore, an inlet hole (1-3), a straight outlet hole (1-4), and an adjusting outlet hole (1-5) are arranged in the annular concave plane (1-2), and two sets of countersunk holes (1-6) are also arranged.

[0049] The inlet hole (1-3), the straight outlet hole (1-4), and the regulating outlet hole (1-5) are all connected to the corresponding negative pressure regulator channels. The two sets of countersunk holes (1-6) act as limiting holes and cooperate with the limiting boss (2-5) on the sealing gasket (2) to form a circumferential limiting structure.

[0050] The upper part of the annular concave plane (1-2) has a small protruding ring (1-8), and a control hole (1-7) is arranged in the center. The control hole (1-7) leads to the corresponding external control port.

[0051] The lower side of the truncated cone (1-10) has an instrument column (1-9) for mounting a negative pressure gauge, such as... Figure 7 As shown.

[0052] See Figure 8 and Figure 9 In this example, the sealing gasket (2) is an annular gasket that can be placed on the annular concave plane (1-2) on the valve body (1) to form an adjustable sealing structure between the valve body (1) and the slide valve (4).

[0053] The annular sealing gasket (2) has a corresponding central hole (2-6) in the middle, which corresponds to the inner ring of the annular concave plane (1-2) of the valve body (1), and the outer edge of the annular sealing gasket (2) corresponds to the outer edge of the annular concave plane (1-2).

[0054] Furthermore, the annular sealing gasket (2) is provided with an inlet hole (2-1), a straight outlet hole (2-2), an adjusting outlet hole (2-3), and a control port (2-4) along the same circumference on the upper edge, which correspond one-to-one with the holes in the annular concave plane (1-2) of the valve body (1).

[0055] Furthermore, the bottom surface of the annular sealing gasket (2) is provided with two sets of limiting bosses (2-5), which correspond to the countersunk holes (1-6) in the annular concave plane of the valve body (1) to cooperate in forming a circumferential rotation limit and prevent the sealing gasket (2) from rotating relative to the valve body (1) with the slide valve (4).

[0056] In this example, the sealing ring (3) adopts an annular seal and is placed inside the countersunk hole (1-8) on the valve body (1) to provide a reliable seal for the high driving working pressure of the control port (1-7).

[0057] In this example, the slide valve (4) is mounted on the valve body (1) and cooperates with the annular sealing gasket (2) on the valve body (1); the slide valve (4) can rotate around the axis of the valve body (1) and forms a three-position five-way torsion slide valve structure between the annular sealing gasket (2) and the valve body (1).

[0058] See Figure 10 and Figure 11 In this example, the slide valve (4) is a circular block with a central hole (4-1) and an outer ring with a notch (4-9). An operating handle (4-2) protrudes from the upper part of the outer edge, and a notch (4-3) is on the lower edge. It cooperates with the negative pressure gauge mounting post (1-9) and is used as a limit when the slide valve (4) rotates.

[0059] Furthermore, the slide valve (4) has a first concave waist-shaped flow channel (4-4) and a second concave waist-shaped flow channel (4-5) arranged opposite to each other on the bottom surface of the disc. The specific positions of the first waist-shaped flow channel (4-4) and the second waist-shaped flow channel (4-5) match the positions of the inlet hole (1-3), the straight outlet hole (1-4), and the regulating outlet hole (1-5) on the valve body (1). It can connect the inlet hole (1-3) and the straight outlet hole (1-4), or the regulating outlet hole (1-5) on the valve body (1) in different working modes, or be in a closed state.

[0060] Furthermore, a first exhaust port (4-6a) and a second exhaust port (4-6b) are symmetrically provided on the upper part of the first waist-shaped flow channel (4-4) and the second waist-shaped flow channel (4-5), respectively, for cooperating with the control port (1-7) to close when in the closed working mode position and to open in other working mode positions.

[0061] Furthermore, the back of the disc of this slide valve (4) is concave, with a two-step annular countersunk hole. The bottom step annular hole is provided with small cylindrical tubes (4-7) symmetrically arranged to hold small springs (10) and steel balls (9). The upper outer edge is provided with a platform (4-8) that cooperates with the bottom convex edge (5-5) of the slide valve pressure plate (5).

[0062] In this example, the slide valve pressure plate (5) is used to cooperate with the slide valve (4) and can form an elastic clamping force on the slide valve (4) facing the valve body (1) under the action of the spring (6).

[0063] See Figure 12 and Figure 13In this example, the slide valve pressure plate (5) is a disc with a central hole (5-1) and a notch (5-2) on the outer edge. The notch (5-2) cooperates with the negative pressure gauge mounting post (1-9) to prevent the slide valve pressure plate (5) from rotating.

[0064] Furthermore, the outer edge of the bottom surface of the slide valve pressure plate (5) has a raised edge (5-5). In the annulus between the raised edge (5-5) and the central hole (5-1), two sets of symmetrical positioning grooves are provided at positions corresponding to the small cylinder (4-7) of the slide valve (4). Each set of positioning grooves contains three positioning grooves (5-3), which correspond to three working mode positions respectively, for positioning in conjunction with the steel ball (9).

[0065] Furthermore, the slide valve plate (5) has vent holes (5-4) outside the annular space for communication with the outside. As an example, two vent holes (5-4) are used here, and they are symmetrically distributed. However, it is not limited to this, and other numbers of vent holes and distribution schemes can be used as needed.

[0066] Furthermore, a circular platform (5-6) is provided on the back of the slide valve pressure plate (5) to fix the spring (6).

[0067] In this example, the steel ball (9) and the small spring (10) cooperate to form a corresponding elastic positioning component, which is placed between the slide valve pressure plate (5) and the slide valve (4). The small spring (10) is placed in the small cylinder (4-7) on the slide valve (4) and elastically abuts the steel ball (9). The steel ball (9) cooperates with the positioning groove (5-3) on the slide valve pressure plate (5).

[0068] Specifically, two steel balls (9) are used here, each composed of a corresponding steel ball. Two sets of small springs (10) are used in conjunction with them, each composed of a corresponding helical spring.

[0069] In this example, the spring (6), spring cap (7), and screw (8) work together to form a corresponding elastic pressure loading assembly.

[0070] The spring (6) is a corresponding helical spring, one end of which is placed on the annular platform (5-6) on the back of the slide valve pressure plate (5).

[0071] The spring cover (7) has a T-shaped disk with a small cylinder at the center and a central hole; the spring cover (7) with this structure is inserted into the other end of the spring (6) based on the small cylinder at its center.

[0072] The screw (8) is a long screw that extends from the center hole of the spring cover (7), passes through the spring cover (7) and connects to the screw hole (1-11) on the valve body spindle (1-1), thereby fixing and pressing the spring cover (7), and then the spring cover (7) compresses the spring (6) to generate elastic loading pressure.

[0073] The following explains the working process of the working mode switch of the negative pressure regulator with linkage control in this example.

[0074] See Figures 5-13 The working mode switch of this medical negative pressure regulator is assembled in the following manner:

[0075] First, place the sealing gasket (2) in the annular concave plane (1-2) of the valve body (1), slightly higher than the flange of the annular concave plane (1-2). The boss (2-5) on the bottom surface of the sealing gasket matches the countersunk hole (1-6) in the annular concave plane of the valve body (1), so that the sealing gasket (2) is fixed and the inlet and outlet holes are aligned.

[0076] Next, place the sealing ring (3) inside the small annulus (1-8) of the valve body (1), slightly protruding from the sealing gasket (3).

[0077] Next, the center hole of the slide valve (4) is inserted into the spindle (1-1) of the valve body (1), and the bottom surface presses against the sealing gasket (2) and the sealing ring (3). The lower edge notch (4-3) is inserted into the instrument column (1-9) of the valve body (1). At the same time, the small spring (10) and the steel ball (9) are placed into the small cylinder (4-7) in sequence.

[0078] Next, the slide valve pressure plate (5) is placed on the assembled slide valve (4), and the outer edge notch (5-2) is positioned on the instrument column (1-9), with a pair of small grooves (5-3) positioned on the steel ball (9).

[0079] Based on this, the spring (6) is placed on the slide valve pressure plate (5) and positioned by the annular platform (5-6). The small cylinder of the spring cover (7) is inserted into the spring (6), passes through the central hole (5-1) of the slide valve pressure plate (5), and presses on the end face of the spindle (1-1) of the valve body (1). The upper disc of the spring cover (7) presses on the end face of the spring (6); finally, the screw (8) passes through the central hole of the spring cover (7) and is screwed into the central screw hole (1-11) of the spindle (1-1) of the valve body (1), fixing the spring cover (7) on the valve body (1), while compressing the spring (6), providing a stable elastic sealing force for the valve slide (4) through the slide valve pressure plate (5), ensuring the sealing of the slide valve (4) and smooth operation. At the same time, the sealing ring (3) is pressed tighter, reliably sealing the control port (1-7). By pressing down on the steel ball (9), the small spring (10) is compressed, giving the steel ball (9) an elastic positioning force.

[0080] The operating process of the negative pressure regulator with linkage control, which is assembled and formed, is as follows:

[0081] During operation, the valve slide (4) can rotate around the spindle (1-1) at a certain angle, and the rotation angle is limited by the notch (4-3) and the instrument column (1-9). Through the slide valve pressure plate (5), the spring (6) provides a stable sealing force to the valve slide (4), pressing it onto the sealing gasket (2) and the sealing ring (3), ensuring the sealing of the valve slide (4) when rotating around the spindle (1-1) and the sealing of the control port (1-7).

[0082] Furthermore, the instrument column (1-9) constrains the circumferential direction of the slide valve pressure plate (5) and fixes the slide valve pressure plate (5), so that the valve slide (4) can slide stably and flexibly under the slide valve pressure plate (5).

[0083] At the same time, as the small spring (10) and steel ball (9) rotate with the valve slide (4), they move and change positions between the three positioning grooves (5-3) of the slide valve pressure plate (5) to position the working mode of the valve slide (4).

[0084] like Figure 14 As shown, when the slide valve (4) is in the OFF working mode, the steel ball (9) is positioned in the small groove (5-3) in the middle position. The inlet hole (1-3), the straight outlet hole (1-4), the regulating outlet hole (1-5), and the control port (1-7) on the valve body (1) are all closed by the slide valve (4). The negative pressure regulator is in the closed state, does not output negative pressure, and does not send a linkage signal to the negative pressure generator.

[0085] like Figure 15 As shown, when the slide valve (4) is switched to the REG adjustment working mode, the steel ball (9) is positioned in the left small groove (5-3). The second waist-shaped flow channel (4-5) on the slide valve (4) connects the inlet hole (1-3) on the valve body (1) with the adjustment outlet hole (1-5). Negative pressure is output from the adjustment outlet hole (1-5), and the negative pressure regulator is in the adjustment working mode. At the same time, the control port (1-7) is opened by the second exhaust port (4-6b) on the slide valve (4). The air pressure in the control port (1-7) is released through the second exhaust port (4-6b) and the vent hole (5-4), giving the negative pressure generator an opening signal. The negative pressure generator starts and generates negative pressure to provide a negative pressure source for the negative pressure regulator. At the same time, the direct outlet hole (1-4) is closed by the slide valve (4).

[0086] like Figure 16As shown, when the slide valve (4) is switched to the FULL direct-flow working mode, the steel ball (9) is positioned in the right-side small groove (5-3). The first waist-shaped flow channel (4-4) on the slide valve (4) connects the inlet hole (1-3) on the valve body (1) with the direct-flow outlet hole (1-4). Negative pressure is output from the direct-flow outlet hole (1-4), and the negative pressure regulator is in the FULL direct-flow working mode. At the same time, the control port (1-7) is opened by the first exhaust port (4-6a) on the slide valve (4). The air pressure in the control port (1-7) is released through the first exhaust port (4-6a) and the vent hole (5-4), giving the negative pressure generator an opening signal. The negative pressure generator starts and generates negative pressure, providing a negative pressure source for the negative pressure regulator. At the same time, the regulating outlet hole (1-5) is closed by the slide valve (4).

[0087] The negative pressure regulator operating mode switch based on the above scheme adopts a three-position, five-way torsion valve structure. While retaining the original three-way structure, two additional control ports are added: one for control and the other for venting. In the OFF position, the control port is closed; in other positions, the control port connects to the venting port for venting. Figure 17 and 18 As shown, when the working mode switch (11) of the negative pressure regulator with such structure is applied to the negative pressure regulator (12), its control port can be connected to the negative pressure generator (14) through the corresponding linkage control tube (13). This allows the switch of the dedicated negative pressure generator to be controlled by a single pipeline, and the linkage switch with the negative pressure generator that provides the negative pressure source is realized. This makes the operation more convenient, saves the driving gas source, and is economical.

[0088] As can be seen from the above, the working mode switch of the negative pressure regulator with linkage control presented in this example adopts a three-position five-way torsion valve structure. It mainly consists of a valve body with inlet and outlet ports and sealing gaskets, and a slide valve with a waist-shaped flow channel and an exhaust port. This adds a control port and an exhaust port to the original three-position three-way function. Thus, in the OFF position, the control port is closed; in other positions, the control port connects to the vent port for venting. This achieves single-line control of the dedicated negative pressure generator's switch, realizing the linkage operation of the negative pressure generator and the negative pressure regulator, making it more convenient to use and saving gas.

[0089] Furthermore, the working mode switch of this negative pressure regulator adopts the structure of a spring-loaded torsion valve switch. The spring force presses the valve tightly, and the spring loading force is stable, ensuring good pressure consistency of the valve switch, flexible switching, and good sealing.

[0090] It should be noted that the present invention is not limited to the above-described embodiments, but can be modified and varied in various ways according to design needs and other factors within the scope of the appended claims or their equivalents, such as the shape of the slide valve (4) and the slide valve pressure plate (5); the length of the spindle (1-1); the shape of the spring cover (7) and its fit or combination with the screw (8); the addition or subtraction of the sealing ring (3), etc.

[0091] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure regulator operating mode switch with linkage control, comprising a valve body and a slide valve, characterized in that, It also includes a sealing gasket, a slide valve pressure plate, and an elastic pressure loading assembly. The valve body is provided with a sealing gasket, which is non-rotatable relative to the valve body. The slide valve is rotatably mounted on the valve body and abuts against the sealing gasket. The slide valve pressure plate is mounted on the slide valve. The slide valve pressure plate is a disc with a central hole and a notch on the outer edge. The notch cooperates with the negative pressure gauge mounting post to prevent the slide valve pressure plate from rotating. The outer edge of the bottom surface of the slide valve pressure plate has a raised edge. In the annular space between the raised edge and the central hole, two sets of symmetrical positioning grooves are provided at positions corresponding to the small cylinder of the slide valve. Each set of positioning grooves contains three positioning grooves, which correspond to three working mode positions and are used to cooperate with the steel ball for positioning. The elastic pressure loading component passes through the slide valve pressure plate, slide valve and valve body in sequence and is elastically abutted against the slide valve pressure plate. It can apply an elastic clamping force to the slide valve pressure plate facing the valve body, so that the slide valve and the sealing gasket are pressed together on the valve body in sequence to form an integral structure. The slide valve can rotate around the axis of the valve body, forming a three-position five-way torsion slide valve structure with the valve body. The three-position five-way torsion slide valve structure includes three positions: closed, regulating, and straight-through, as well as five ports: air inlet, regulating port, straight-through port, control port, and vent port. When the three-position five-way torsion slide valve structure is in the closed state, the control port is closed. When the three-position five-way torsion slide valve structure is in the open state, the control port is connected to the vent port. The closed and vent states of the control port can be used to externally control the negative pressure generator switch and work in conjunction with it.

2. The negative pressure regulator operating mode switch with linkage control according to claim 1, characterized in that, The valve body is provided with an inlet hole, a straight outlet hole, an adjustable outlet hole, a control port hole, and an vent hole. The inlet hole, the straight outlet hole, and the adjustable outlet hole are respectively connected to the corresponding external inlet and outlet holes. The control port hole is connected to the corresponding external control port. The vent hole hole is connected to the atmosphere.

3. The negative pressure regulator operating mode switch with linkage control according to claim 2, characterized in that, The slide valve has two sets of concave waist-shaped flow channels on its bottom surface facing the valve body. The positions of the two sets of concave waist-shaped flow channels match the positions of the inlet hole, straight outlet hole, and regulating outlet hole on the valve body. In the corresponding working mode position, the air inlet is connected to the straight outlet hole or the regulating outlet hole respectively. The bottom surface of the slide valve is provided with an exhaust hole that matches the control port hole on the valve body.

4. The negative pressure regulator operating mode switch with linkage control according to claim 3, characterized in that, The slide valve pressure plate has several vent holes.

5. The working mode switch of the negative pressure regulator with linkage control according to claim 1, characterized in that, The elastic pressure loading assembly consists of a spring, a spring cover, and screws. The spring is mounted on the spring cover, and the screws pass through the spring cover for connecting to the valve body.

6. The working mode switch of the negative pressure regulator with linkage control according to claim 1, characterized in that, Several elastic positioning components are provided between the slide valve and the slide valve pressure plate.

7. The negative pressure regulator operating mode switch with linkage control according to claim 6, characterized in that, The elastic positioning component is composed of a steel ball and a small spring.

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