CN117823679A - Pinch valve group - Google Patents

Abstract

The application provides a pipe clamping valve group, which comprises a clamping unit and a driving unit, wherein the clamping unit comprises a clamping base and a clamping assembly; the driving unit comprises a first driving piece and a second driving piece; a fluid pipeline can be arranged between two adjacent clamping pieces; when the driving unit moves towards the side of the first driving piece along the second direction, the second driving piece moves along the second ascending sliding surface of the first clamping piece; then, the driving unit moves towards the side of the second driving piece, the first driving piece slides along the first upward sliding surface of the second clamping piece and pushes the first driving piece to move in the upward direction, so that the first clamping piece adjacent to the first driving piece in the upward direction clamps the first clamping piece to disconnect the fluid pipeline between the first clamping piece and the second clamping piece, and the first driving piece is separated from the third clamping piece adjacent to the third clamping piece in the downward direction to connect the fluid pipeline between the first clamping piece and the third clamping piece. According to the technical scheme, the cost can be reduced, and the control flexibility is improved.

Description

Pinch valve group

Technical Field

The application relates to a pipe clamping valve group which can reduce cost and is simple and convenient to control.

Background

In the fields of medical health, food, chemical industry and the like which have requirements on the integrity of fluid pipelines, the fluid pipelines need to be controlled in an automatic process, and the on-off of different pipelines are controlled according to time sequences.

In an automatic device for delivering multiple liquids through multiple channels, the liquid channel is usually designed to be delivered by using a pump for each liquid, or is designed to be switched by forming multiple liquid channels in a 'many' shape through a plurality of two-position three-way valves, or is controlled by using an on-off valve group (or called a discharge valve).

The common disadvantages of the above schemes are high material cost and complex control of the pump valve and the electric control system, and the poor reliability of the system caused by the co-operation of a plurality of control devices. For designs that are not high precision requirements, a need exists for a pinch valve block that can further reduce cost and improve flexibility and reliability.

For this reason, in the prior art, there is a technical problem of how to reduce the cost and control simplicity of the pinch valve group.

Disclosure of Invention

The purpose of the present application is to provide a pipe clamping valve group that can reduce cost and control easily. In order to achieve the above objective, one aspect of the present application is a pinch valve set, including a clamping unit and a driving unit, where the pinch valve set is used to control on-off of a plurality of fluid pipelines, and the clamping unit includes a clamping base and a clamping assembly including a first clamping member, a second clamping member, and a third clamping member; each clamping piece in the clamping assembly is sequentially arranged on the clamping base and can move along a first direction, and the two ends of each clamping piece are respectively provided with a first ascending sliding surface and a second ascending sliding surface which are obliquely arranged towards the same side; the driving unit comprises a first driving piece and a second driving piece, the first driving piece and the second driving piece can synchronously reciprocate along a second direction crossing the first direction, and the projection of the first driving piece and the second driving piece in the first direction and the projection of the first driving piece and the projection in the second direction are respectively arranged at intervals; the driving unit and the clamping unit are arranged along a third direction, the first driving piece and the second driving piece extend along the third direction, and the third direction is perpendicular to the first direction and the second direction; a fluid pipeline can be arranged between two adjacent clamping pieces in the clamping assembly; in an initial state, the first driving piece is closer to the descending direction of the clamping assembly relative to the second driving piece; when the driving unit moves towards the side of the first driving piece along the second direction, the second driving piece can relatively move along the second ascending sliding surface of the first clamping piece; and then, the driving unit moves towards the side of the second driving piece along the second direction, the first driving piece can relatively move along the first ascending sliding surface of the second clamping piece, and pushes the second clamping piece to move along the first direction towards the ascending direction, so that the second clamping piece and the first clamping piece adjacent to the ascending direction are clamped to disconnect a fluid pipeline between the second clamping piece and the third clamping piece adjacent to the descending direction, and the second clamping piece and the third clamping piece adjacent to the descending direction are separated to conduct the fluid pipeline between the second clamping piece and the third clamping piece.

According to the technical scheme, the specific clamping piece is pushed to move upwards through the up-and-down movement of the driving unit, so that two adjacent clamping pieces are separated or clamped, the connection or disconnection of a fluid pipeline between the two clamping pieces is realized, and the hydraulic control device is simple in structure, low in cost and convenient to control relative to the scheme of arranging a plurality of control valves.

In a preferred manner, when the second driving member moves relatively along the second upward sliding surface of the first clamping member, the first clamping member is pushed to move in the upward direction along the first direction, and the second clamping member also moves along the first clamping member in the same direction; the third clamping piece also follows the second clamping piece to move in the same direction and clamps the fluid pipeline between the second clamping piece and the third clamping piece.

According to the technical scheme, when the second driving piece pushes the first clamping piece to move towards the upward direction, the second clamping piece and the third clamping piece adjacent to each other in the downward direction move to the position opposite to the first driving piece in the same direction, so that the first driving piece can touch the first upward sliding surfaces of the second clamping piece and the third clamping piece when falling back.

In a preferred manner, the projection distance of both ends of each clamping member in the clamping assembly in the second direction is not greater than the interval of projections of the first driving member and the second driving member in the second direction.

According to the technical scheme, the clamping piece can be arranged in the gap between the first driving piece and the second driving piece, and the first driving piece and the second driving piece can be ensured to move up and down conveniently.

In a preferred embodiment, the angle between the direction determined by the first driving member and the second driving member relative to the second direction is adjustable.

According to the technical scheme, the control flexibility can be further improved through the adjustable inclination angle, one clamping piece can be pushed by moving up and down each time when the angle is small, a plurality of clamping pieces can be spanned by moving up and down each time when the angle is large, and the clamping pieces which are already ascending can be retracted and reset towards the descending direction through moving up and down when the angle is reversely inclined.

In a preferred mode, both ends of at least a part of the clamping members in the clamping assembly are further provided with a first downward sliding surface and a second downward sliding surface which are obliquely arranged towards the same side respectively; adjusting an inclination angle of a direction determined by the first driving piece and the second driving piece relative to the second direction, so that the first driving piece is closer to the upward direction of the clamping assembly relative to the second driving piece; when the driving unit moves to the side of the second driving member, the first driving member can slide along the first downward sliding surface of the single clamping member and push the first driving member to move in the downward direction, so that the first driving member and the clamping member adjacent in the downward direction clamp each other to disconnect the fluid pipeline between the first driving member and the second driving member, and the first driving member and the clamping member adjacent in the upward direction separate each other to conduct the fluid pipeline between the first driving member and the second driving member.

According to the technical scheme, the clamping piece which is already lifted can be retracted and reset towards the downward direction by moving up and down.

In a preferred mode, the clamping piece at the tail end in the descending direction in the clamping assembly is taken as a tail end clamping piece; the last clamping piece is further provided with a chute connected with the second ascending sliding surface of the last clamping piece, and an opening of the chute is arranged towards the third direction; when the second driving piece moves along the second upward sliding surface of the last clamping piece towards the side of the first driving piece, the second driving piece can slide out to the side of the last clamping piece towards the third direction along the sliding groove, so that the first driving piece, the second driving piece and the clamping assembly are separated; further, the clamp assembly can be retracted in the downward direction.

According to the technical scheme, when the second driving piece slides out of the chute, the first driving piece and the second driving piece are separated from the plane where the clamping assembly is located, so that interference is not generated on movement of the clamping assembly in the first direction, and the clamping assembly can be reset to an initial state.

In a preferred embodiment, the clamping base is connected to a first elastic member having a predetermined allowable deformation amount in the first direction; in the process that the clamping assembly moves in the upward direction, the clamping base synchronously moves along with the clamping assembly, and the first elastic piece is elastically deformed; after the second driving piece slides out of the sliding groove, the first elastic piece rebounds and drives the clamping assembly to retract towards the descending direction through the clamping base.

According to the technical scheme, the first elastic piece can drive the clamping assembly to automatically retract and reset.

In a preferred mode, the clamping piece at the head end in the uplink direction in the clamping assembly is taken as the head clamping piece; a second elastic piece with a specified deformation allowance in the first direction is connected between one side of the head clamping piece in the ascending direction and the clamping base; the second elastic member is compressed in the process of moving the clamping assembly in the upward direction; after the second driving piece slides out of the sliding groove, the second elastic piece rebounds and pushes the clamping assembly to retract towards the descending direction through the first clamping piece.

According to the technical scheme, the second elastic piece can drive the clamping assembly to automatically retract and reset.

In a preferred form, the clamping assembly is provided with a recess on one side in the upstream and/or downstream direction of each clamping member for allowing passage of a fluid line.

According to the technical scheme, the fluid pipeline is convenient to set between the clamping pieces.

According to the technical scheme, a driving rod is fixedly connected between the first driving piece and the second driving piece; a third elastic piece with a specified deformation allowance in the third direction is connected between the driving rod and the clamping base; when the second driving piece slides out to the side of the last clamping piece, which faces the third direction, along the sliding groove, the third elastic piece is elastically deformed; after the clamping assembly retreats towards the descending direction, the third elastic piece rebounds and drives the first driving piece and the second driving piece to reset along the third direction through the driving rod.

According to the technical scheme, the third elastic piece can drive the driving unit to reset automatically.

Drawings

In order to more clearly illustrate the present application, the following description and illustrations of the specification drawings of the present application will be made. It will be apparent to those of ordinary skill in the art that the drawings in the following description merely illustrate certain aspects of some exemplary embodiments of the present application and that other drawings may be obtained from these drawings without the benefit of the inventive faculty.

Fig. 1 is a front side view of a pinch valve block.

Fig. 2 is a rear oblique view of the pinch valve block.

Fig. 3 is a schematic view of a clamping assembly.

Fig. 4 is a schematic diagram of an assembly of the clamping assembly and the clamping base.

Fig. 5 (1) is a schematic view of the initial state of the second driving member being moved obliquely upward.

Fig. 5 (2) is a schematic diagram showing an end state of the second driving member being moved obliquely upward.

Fig. 5 (3) is a schematic view of the initial state of the first driving member being moved obliquely downward.

Fig. 5 (4) is a schematic view of the end state of the first driving member being moved obliquely downward.

Fig. 6 is a schematic diagram of the automatic reset of the clamping assembly.

Fig. 7 (1) is a schematic size diagram of the driving unit.

Fig. 7 (2) is a schematic size view of the first clamp.

Fig. 8 is a schematic diagram of a liquid path control principle of the conventional art.

Fig. 9 is a schematic diagram of the liquid path control principle of the present application.

Description of the drawings:

1 clamping Unit

10 clamping base

101 base right end

102 base left end

103 base rear wall

1031 rear wall rail

104 front wall of base

11 first clamping member

111 first uplink slide surface

112 first second uplink sliding surface

113 first downlink slide

114 first second downlink sliding surface

115 groove number one

12 second clamping member

121 second first uplink sliding surface

122 second uplink sliding surface

123 No. two first downlink sliding surface

124 second downlink sliding surface

13 third clamping member

131 third first upward sliding surface

132 third second upward sliding surface

133 third first downlink slide

134 third second downlink sliding surface

14 fourth clamping member

141 No. four first upward sliding surface

142 fourth second upward sliding surface

143 No. four first downlink sliding surface

144 fourth second downlink sliding surface

15 fifth clamping piece

150 chute

151 fifth first upward sliding surface

152 fifth second upward sliding surface

155 groove No. five

156 fifth clamping projection

2 drive unit

20 valve body

201 valve body track

21 first driving member

22 second driving member

23 drive rod

24-drive clamping piece

31 first elastic member

33 third elastic member

40 pump

41 first container

42 second container

43 reaction tank

44 relay container

45 third container

46 first three-way valve

47 second three-way valve

48 on-off valve

51 pipeline

52 pipeline

53 pipeline

54 pipeline

61 pipeline

611 pipeline

62 pipeline

622 pipeline

63 pipeline

64 pipeline

65 pipeline

Detailed Description

Various exemplary embodiments of the present application are described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the application, uses, or uses of the invention. This application may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, numerical expressions and values, etc. set forth in these embodiments are to be construed as illustrative only and not as limiting unless otherwise stated.

As used in this application, the word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and that no other elements are excluded from the possible coverage.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Parameters of, and interrelationships between, components, and control circuitry for, components, specific models of components, etc., which are not described in detail in this section, can be considered as techniques, methods, and apparatus known to one of ordinary skill in the relevant art, but are considered as part of the specification where appropriate.

Overall structure

The general construction of the pinch valve block of the present application is described below with reference to fig. 1 and 2. Fig. 1 is a front side view of a pinch valve block, and fig. 2 is a rear side oblique view of the pinch valve block.

Referring to fig. 1, the pinch valve set of the present application includes a clamping unit 1 and a driving unit 2 for controlling on-off of a plurality of fluid pipelines. The clamping unit 1 comprises a clamping base 10 and a clamping assembly comprising at least three clamping members, each of which is arranged in sequence on the clamping base 10, being movable in a first direction. For simplicity, the clamping assembly will be described herein by way of example only as comprising the illustrated first clamping member 11, second clamping member 12, third clamping member 13, fourth clamping member 14, and fifth clamping member 15.

The drive unit 2 comprises a first drive member 21 and a second drive member 22. The first driver 21 and the second driver 22 are reciprocally movable in synchronization in a second direction intersecting the first direction, and projections of the first driver 21 and the second driver 22 in the first direction and projections in the second direction are respectively provided at intervals.

For convenience of explanation, the present application uses the illustrated X-axis direction as a first direction, the Y-axis direction perpendicular to the X-axis direction as a second direction, and the Z-axis direction perpendicular to the XY plane as a third direction. In practice, the second direction and the third direction are not limited to this, and the second direction may be a direction inclined at a predetermined angle with respect to the Y axis on the XY plane, and the third direction may be a direction inclined at a predetermined angle with respect to the Z axis direction, and is not particularly limited herein.

In the first direction, the direction from the fifth clamp 15 toward the first clamp 11 is shown as the upward direction, i.e., the left side, and the direction is shown as the downward direction, i.e., the right side. In the second direction, the first driving member 21 is shown on the upper side of the clamping base 10, the second driving member 22 is shown on the lower side of the clamping base 10, the side shown in fig. 1 is the front side of the entire pinch valve set, and the side shown in fig. 2 is the rear side of the entire pinch valve set.

The first driving member 21 and the second driving member 22 are disposed at intervals in the projection in the second direction so as to be spaced apart by a certain distance in the second direction to accommodate the clamping assembly.

The projections of the first drive element 21 and the second drive element 22 in the first direction are arranged at intervals, i.e. the directions determined by the two drive elements are inclined at an angle to the Y-axis. The direction determined by the two driving members is referred to herein as the extending direction of the driving lever 23 described later. In other words, as a preferable mode, the first driver 21 and the second driver 22 are provided at intervals in a direction intersecting both the first direction and the second direction, that is, the extending direction of the driving lever 23 described later is provided obliquely intersecting both the first direction and the second direction.

When the second direction coincides with the Y-axis direction, the direction determined by the first driver 21 and the second driver 22, that is, the extending direction of the driving lever 23 described later, needs to be inclined at a predetermined angle with respect to the second direction, so that the projections of the first driver 21 and the second driver 22 in the first direction can be kept at a predetermined interval.

When the second direction does not coincide with the Y-axis direction and is inclined with respect to the Y-axis on the XY plane, the direction determined by the first driver 21 and the second driver 22, that is, the extending direction of the driving lever 23 described later, may be inclined at a constant angle with respect to the second direction, or may overlap with the second direction, and the projections of the first driver 21 and the second driver 22 in the first direction may be kept at a constant interval.

Both embodiments are intended to keep the projections of the first 21 and second 22 driving members at a certain distance in the first direction, so that the two driving members move up and down pushing the different clamping members in the first direction, respectively. For simplicity, only the second direction is described herein as coinciding with the Y-axis direction.

The driving unit 2 and the clamping unit 1 are arranged in a third direction, and the driving unit 2 is illustratively located at the rear side of the clamping unit 1, and the first and second driving members 21 and 22 extend toward the front side in the third direction. Wherein, be provided with the fluid pipeline between two adjacent holders in the clamping assembly, and can be provided with a fluid pipeline between two adjacent holders, also can set up a plurality of fluid pipelines, not specifically limited here.

In the use process, the driving unit 2 controls a specific clamping piece in the clamping assembly to move in the upward/downward direction, so that the clamping piece is closed or separated from an adjacent clamping piece, and a fluid pipeline between the two clamping pieces is disconnected/connected, so that the flow direction and the flow rate of fluid are accurately controlled.

Clamping unit

Next, the clamping unit 1 will be specifically described with reference to fig. 3 and 4. Fig. 3 is a schematic view of the structure of the clamping assembly, and fig. 4 is a schematic view of the assembly of the clamping assembly and the clamping base 10.

Referring to fig. 3, the upper and lower ends of each clamping member in the clamping assembly are respectively provided with a first upward sliding surface and a second upward sliding surface which are inclined towards the same direction, and the first upward sliding surface and the second upward sliding surface may be inclined surfaces, or may be curved surfaces or cambered surfaces which are inclined, and for simplicity, the inclined surfaces are only used as examples for illustration.

As an example, the first holder 11 has a first upward slide surface 111 and a second upward slide surface 112 which are inclined to the right, the second holder 12 has a second first upward slide surface 121 and a second upward slide surface 122 which are inclined to the right, the third holder 13 has a third first upward slide surface 131 and a third second upward slide surface 132 which are inclined to the right, the fourth holder 14 has a fourth first upward slide surface 141 and a fourth second upward slide surface 142 which are inclined to the right, and the fifth holder 15 has a fifth first upward slide surface 151 and a fifth second upward slide surface 152 which are inclined to the right.

The first upward sliding surface 111, the second first upward sliding surface 121, the third first upward sliding surface 131, the fourth first upward sliding surface 141, and the fifth first upward sliding surface 151 are located on the upper side of the clamping base 10, and the first second upward sliding surface 112, the second upward sliding surface 122, the third second upward sliding surface 132, the fourth second upward sliding surface 142, and the fifth second upward sliding surface 152 are located on the lower side of the clamping base 10.

Preferably, grooves are also provided on the left and/or right side of each clamping member, such as groove number one 115 of the first clamping member 11 and groove number five 155 of the fifth clamping member 15 as shown, to accommodate fluid lines disposed in a third direction through the grooves of the respective clamping members.

Referring to fig. 4, the clamp base 10 has a base right end 101 in the downward direction and a base left end 102 in the upward direction. Among them, between the first clamping member 11 and the base left end 102, and between the fifth clamping member 15 and the base right end 101, fluid lines may be provided, and the respective fluid line ends may be opened/closed by clamping/separating between the clamping member and the clamping base 10.

The clamping base 10 further comprises a base front wall 104 and a base rear wall 103 extending along the first direction, a sliding rail extending along the first direction is arranged on the base front wall 104 and/or the base rear wall 103, and each clamping piece in the clamping assembly is provided with a clamping protrusion extending along the third direction and connected with the sliding rail in a matching way. Illustratively, as shown, the fifth clamp 15 has a fifth clamp projection 156 extending toward the rear side, and the fifth clamp projection 156 is engaged with the rear wall rail 1031 and is capable of sliding left and right along the rear wall rail 1031. The other clamping members are connected to the clamping base 10 in the same manner, and will not be described in detail here. The manner in which the clamp assembly is connected to the clamp base 10 is not limited thereto, but is described as one manner.

Driving unit

Next, the driving unit 2 will be specifically described with reference to fig. 1 and 2.

Referring to fig. 1 and 2, as previously described, the first driving member 21 and the second driving member 22 can be reciprocally moved in synchronization in the second direction. When the second direction coincides with the Y-axis direction, the direction determined by the first driver 21 and the second driver 22 is inclined so as to intersect the second direction, that is, the extending direction of the driving lever 23 described later forms a certain angle with the moving direction thereof.

The first driving piece 21 and the second driving piece 22 extend in the third direction toward the side close to the clamp assembly, extend to the upper side and the lower side of the clamp base 10 in the initial state, respectively, i.e., are located in the XY plane with the clamp base 10, and the first driving piece 21 is disposed closer to the downstream direction, i.e., farther to the right, than the second driving piece 22.

Preferably, the projection distance of the upper and lower ends of each clamping member in the clamping assembly in the second direction is not greater than the spacing distance of the first and second driving members 21, 22 in the second direction.

As an example, the driving unit 2 includes a valve body 20 fixedly provided, and the valve body 20 includes a valve body rail 201 extending in the second direction. A driving rod 23 is connected between the first driving piece 21 and the second driving piece 22, the driving rod 23 is connected to the valve body track 201 through a driving clamping piece 24, and the driving mechanism controls the driving rod 23 to reciprocate along the valve body track 201 through the driving clamping piece 24 so as to control the first driving piece 21 and the second driving piece 22 to move along the second direction. At this time, the driving lever 23 is inclined at a predetermined angle with respect to the second direction.

It will be appreciated that the first driving member 21 and the second driving member 22 may also be synchronously moved by other means, for example, the first driving member 21 and the second driving member 22 are respectively connected to an electromagnetic module, and the driving rod 23 is synchronously moved back and forth in the second direction by electromagnetic control, which is only described as an example.

Principle of driving

Next, a principle process of the driving unit 2 driving the clamping assembly to move will be specifically described with reference to fig. 5 (1) -5 (4). Fig. 5 (1) is a schematic view of a start state of the second driving member 22 being moved obliquely upward, fig. 5 (2) is a schematic view of an end state of the second driving member 22 being moved obliquely upward, fig. 5 (3) is a schematic view of a start state of the first driving member 21 being moved obliquely downward, and fig. 5 (4) is a schematic view of an end state of the first driving member 21 being moved obliquely downward.

As shown in fig. 5 (1), when the driving unit 2 moves in the second direction toward the side, i.e., the upper side, of the first driving member 21, the second driving member 22 starts to move relatively obliquely upward along the third second upward sliding surface 132 of the third clamping member 13 until the second driving member 22 reaches the position shown in fig. 5 (2), i.e., moves relatively along the third second upward sliding surface 132 until it is located between the third clamping member 13 and the fourth clamping member 14, at which time the third clamping member 13 and the fourth clamping member 14 are separated, and the fluid line therebetween is conducted.

During this process, the second driving member 22 pushes the third clamping member 13 to move in the upward direction, i.e., to the left. As a preferred way, the fourth clamping member 14 adjacent to the third clamping member 13 also follows the third clamping member 13 in the same direction; the fifth clamping member 15 also follows the fourth clamping member 14 in the same direction and clamps the fluid line therebetween with the fourth clamping member 14.

Thereafter, as shown in fig. 5 (3), the driving unit 2 moves to the side, i.e., the lower side, of the second driving member 22, the first driving member 21 moves relatively downward along the fourth first upward sliding surface 141 of the fourth clamping member 14 adjacent to the third clamping member 13 in the downward direction, and pushes the fourth clamping member 14 to move upward, i.e., to the left, until the first driving member 21 reaches the position shown in fig. 5 (4), i.e., moves between the fourth clamping member 14 and the fifth clamping member 15 along the fourth first upward sliding surface 141, so that the two clamping members are separated to conduct the fluid line therebetween, and the fourth clamping member 14 and the third clamping member 13 are changed from separation to clamping, so that the fluid line therebetween is disconnected.

When the driving unit 2 continues to move upward, the above process is repeated, that is, the second driving member 22 moves obliquely upward along the fourth second upward sliding surface 142 of the fourth clamping member 14, and the fourth clamping member 14 and the fifth clamping member 15 keep separated from each other, so that the fluid pipeline between the two is conducted. Then, as the driving unit 2 moves downward, the first driving member 21 falls back and moves obliquely downward along the fifth first upward sliding surface 151 of the fifth clamping member 15, pushing the fifth clamping member 15 to move leftward and clamp the fourth clamping member 14, so that the fluid pipeline therebetween is disconnected, and simultaneously, the fluid pipeline between the right side of the fifth clamping member 15 and the clamping base 10 is conducted.

In the initial state, the second driving member 22 is located at a position corresponding to the first clamping member 11. In one embodiment, the second driving member 22 is located at the right side of the first clamping member 11, and when the driving unit 2 moves upwards, the second driving member 22 slides obliquely upwards along the first second upward sliding surface 112 of the first clamping member 11 to push the first clamping member 11 to move leftwards, if a fluid pipeline is arranged between the first clamping member 11 and the left end 102 of the base, the fluid pipeline is disconnected, and the first clamping member 11 and the second clamping member 12 are separated to conduct the fluid pipeline therebetween. Then, as the driving unit 2 moves downward, the first driving member 21 falls back and moves obliquely downward along the second first upward sliding surface 121 of the second clamping member 12, pushing the second clamping member 12 to move leftward and clamp the first clamping member 11, so that the fluid pipeline therebetween is disconnected, and simultaneously, the second clamping member 12 and the third clamping member 13 are separated to conduct the fluid pipeline therebetween.

In another embodiment, the second driving member 22 is located at the left side of the first clamping member 11, and the driving unit 2 does not push the first clamping member 11 when moving upwards, but when the driving unit 2 moves downwards, the first driving member 21 falls back and moves obliquely downwards along the first ascending sliding surface 111 of the first clamping member 11, so as to push the first clamping member 11 to move leftwards and clamp the left end 102 of the base, if a fluid pipeline is arranged between the first clamping member 11 and the second clamping member, the fluid pipeline is disconnected, and meanwhile, the first clamping member 11 is separated from the second clamping member 12, so that the fluid pipeline between the first clamping member and the second clamping member is conducted.

It will be appreciated that the clamping assembly may comprise three, four or more clamping members, not limited to the five illustrated, but the principle of controlling the opening/closing of the fluid line between two adjacent clamping members is consistent with the above description and will not be repeated here.

Next, different embodiments will be described.

In the first embodiment, the clamp base 10 is movable left and right in the first direction, and the spacing between the base right end 101 and the base left end 102 is fixed, and is capable of accommodating the entire clamp assembly and the fluid line in the clamped state, and either one of the first driving member 21 and the second driving member 22. When the driving unit 2 pushes each clamping member in the clamping assembly to move left one by one, the clamping assembly also drives the clamping base 10 to move left. For example, when the driving unit 2 pushes the second clamping member 12 to move left, the second clamping member 12 clamps with the first clamping member 11, and pushes the clamping base 10 to move left synchronously via the first clamping member 11, and the clamping base 10 pushes the fifth clamping member 15 via the right end 101 of the base, and further pushes the third clamping member 13 to move to a position corresponding to the first driving member 21, thereby ensuring that the first driving member 21 can fall back onto the third first ascending sliding surface 131 of the third clamping member 13 when the driving unit 2 moves down. That is, the driving unit 2 synchronously pushes the left gripper via the gripper base 10 to move left while pushing the left gripper to move, and sequentially circulates.

In the second embodiment, by adjusting the inclination angle between the extending direction of the driving rod 23 and the second direction, the first driving member 21 can be made to toggle more than one clamping member in the up-down reciprocating stroke of the driving unit 2. For example, when the inclination angle of the driving lever 23 is increased and the driving unit 2 moves upward, the second driving element 22 slides obliquely upward along the first second upward sliding surface 112 of the first clamping element 11, and then as the driving unit 2 moves downward, the first driving element 21 falls back, but moves obliquely downward across the second clamping element 12 and directly along the third first upward sliding surface 131 of the third clamping element 13, so that the third clamping element 13 and the fourth clamping element 14 are separated from each other, and the fluid line therebetween is conducted. Of course, further increasing the inclination angle of the drive rod 23 allows the first drive member 21 to directly ride over more clamps in the up-and-down reciprocating stroke, thereby increasing the flexibility and convenience of fluid line control.

In other words, as a preferred way, the inclination angle between the extending direction of the driving rod 23 and the second direction is adjustable. The inclined included angle can be adjusted to a preset angle before working, but further preferably, the inclined included angle can be dynamically adjusted in real time during working according to the actual requirement of a pipeline system, so that the separation condition between a specific clamping piece and an adjacent clamping piece is dynamically adjusted, and the on-off of a fluid pipeline between the clamping pieces is further controlled more flexibly; accordingly, the stroke of the first driving member 21 and the second driving member 22 can be adjusted so as to meet the requirement that each driving member can move in place at different angles. This is conveniently achieved by means of an electronic control system.

It will be appreciated that when the inclination angle between the extending direction of the driving rod 23 and the second direction is adjustable in real time, the clamping base 10 may be fixed, for example, fixedly connected to the valve body 20, and the inclination angle between the extending direction of the driving rod 23 and the second direction is increased in real time along with the upward movement of the driving unit 2 after the driving unit 2 pushes the left clamping member to move left, so that the first driving member 21 can fall onto the first upward sliding surface of the right specific clamping member when falling back.

In the third embodiment, when the inclination angle between the extending direction of the driving rod 23 and the second direction is a preset fixed value, the clamping base 10 may be fixed, for example, fixedly connected to the valve body 20, and a compressed spring may be disposed on the right side of the clamping assembly, and along with the left movement of the left clamping member, the spring pushes the remaining clamping member on the right side to gradually move left to a position corresponding to the first driving member 21, so as to ensure that the first driving member 21 can fall onto the first uplink sliding surface of the specific clamping member on the right side when falling back. Alternatively, a flexible wire may be connected between adjacent grippers, for example between the fourth gripper 14, the fifth gripper 15, and when the fourth gripper 14 moves left, the fifth gripper 15 is pulled to move left synchronously to a position corresponding to the first driving member 21. The specific implementation manner is not limited to this, and will not be described in detail here.

Descending sliding surface

Next, the downlink slide surface will be specifically described with reference to fig. 3.

As previously mentioned, the inclination angle between the line between the first driving member 21 and the second driving member 22 and the second direction is preferably adjustable. In adjusting the inclination angle, in one embodiment, when the first driving member 21 leans to the right relative to the second driving member 22, the inclination angle can be adjusted, or a plurality of angles can be adjusted in advance before use, or can be dynamically adjusted in real time during use; in another embodiment, the first driving member 21 can be adjusted to a position inclined to the left with respect to the second driving member 22, i.e. the projection of the first driving member 21 in the first direction is located to the left of the projection of the second driving member 22 in the first direction.

Both embodiments are preferably concurrent, but may also be implemented separately. For example, when the first driving member 21 is inclined to the right with respect to the second driving member 22, the inclination angle is a predetermined fixed value, but the first driving member 21 can be adjusted to a position inclined to the left with respect to the second driving member 22, which is also an embodiment in which the inclination angle is adjustable.

When the first driving member 21 is adjusted to a position inclined to the left with respect to the second driving member 22, the inclination angle between the line between the first driving member 21 and the second driving member 22 and the second direction may be a predetermined fixed value, but preferably the inclination angle is still adjustable, which may be a plurality of angles that can be adjusted in advance before use, or may be dynamically adjustable in real time during use, which is not particularly limited herein.

Accordingly, as shown in fig. 3, at least a part of the clamping members of the clamping assembly further includes a first downward sliding surface and a second downward sliding surface that are inclined in the upward direction, i.e., in the left direction. The first downlink sliding surface and the second downlink sliding surface may be inclined surfaces, or may be curved surfaces or arc surfaces which are obliquely arranged, and for simplicity, only inclined surfaces are used as examples for illustration.

As an example, as shown in the figure, the first holder 11 has a first downward sliding surface 113 and a second downward sliding surface 114 which are inclined to the left, the second holder 12 has a first downward sliding surface 123 and a second downward sliding surface 124 which are inclined to the left, the third holder 13 has a first downward sliding surface 133 and a second downward sliding surface 134 which are inclined to the left, and the fourth holder 14 has a first downward sliding surface 143 and a second downward sliding surface 144 which are inclined to the left. The fifth clamping member 15 is at the last position in the downward direction, and may or may not be provided with a downward sliding surface, which is not limited herein.

The first downlink sliding surface 113, the second downlink sliding surface 123, the third downlink sliding surface 133, and the fourth first downlink sliding surface 143 are disposed on the upper side of the clamping base 10 and are disposed opposite to the first uplink sliding surface 111, the second uplink sliding surface 121, the third first uplink sliding surface 131, and the fourth first uplink sliding surface 141, respectively. The first second downlink sliding surface 114, the second downlink sliding surface 124, the third downlink sliding surface 134, and the fourth second downlink sliding surface 144 are located at the lower side of the clamping base 10 and are respectively disposed opposite to the first second uplink sliding surface 112, the second uplink sliding surface 122, the third second uplink sliding surface 132, and the fourth second uplink sliding surface 142.

Thus, when one of the clamping members moves in the upward direction, for example, after the third clamping member 13 is moved to the left, the first driving member 21 is located between the third clamping member 13 and the fourth clamping member 14.

In one embodiment, the second driving member 22 is adjusted to an inclined position on the right side relative to the first driving member 21, and then the driving unit 2 is controlled to move upwards, the second driving member 22 can move upwards along the fourth second descending sliding surface 144 of the fourth clamping member 14 between the third clamping member 13 and the fourth clamping member 14, and then when the driving unit 2 moves downwards, the first driving member 21 falls back onto the third first descending sliding surface 133 of the third clamping member 13, and pushes the third clamping member 13 to retract towards the right side.

In another embodiment, the driving unit 2 is controlled to move up, so that the second driving member 22 moves up along the third second ascending sliding surface 132 of the third clamping member 13 to a position between the third clamping member 13 and the fourth clamping member 14, and then the first driving member 21 is adjusted to a position inclined to the left with respect to the second driving member 22, and then the first driving member 21 falls onto the third first descending sliding surface 133 of the third clamping member 13 when falling down along with the downward movement of the driving unit 2, and pushes the third clamping member 13 to retract to the right.

As the third clamp 13 is retracted to the right, the fluid line between the third clamp 13 and the fourth clamp 14 is re-disconnected, and the fluid line between the third clamp 13 and the second clamp 12 is re-conducted.

It will be appreciated that, after the first driving member 21 is adjusted to a left inclined position relative to the second driving member 22, the inclination angle between the connecting line between the first driving member 21 and the second driving member 22 and the second direction is appropriately increased, so that when the first driving member 21 falls back down, it spans the adjacent one or more clamping members, directly contacts the first sliding surface of the specific clamping member on the left side, and pushes the specific clamping member to retract towards the right side, thereby re-conducting the fluid pipeline on the left side of the specific clamping member and re-disconnecting the fluid pipeline on the right side.

In other words, the first driving member 21 can be adjusted to a left inclined position relative to the second driving member 22, so that after pushing one or more clamping members to move left, the one or more clamping members can be pushed back to the right, thereby further increasing the flexibility and convenience of pipeline control.

Automatic reset

Next, the principle of automatic resetting of the clamping assembly will be described with reference to fig. 2 and 6. Fig. 6 is a schematic diagram of the automatic reset of the clamping assembly.

Referring to fig. 2, the last clamping member of the clamping assembly located at the end of the downward direction is the fifth clamping member 15 in this embodiment. The fifth holder 15 includes a chute 150 connected to the fifth second upward slide surface 152, and an opening of the chute 150 is provided in the third direction and is located on the rear side, which is the side of the fifth holder 15 facing the valve body 20.

In the process that the second driving member 22 moves obliquely upwards along the fifth second ascending sliding surface 152 of the fifth clamping member 15, when the second driving member 22 slides to the position where the fifth second ascending sliding surface 152 is connected with the sliding groove 150, the second driving member 22 slides out along the sliding groove 150 to the side, i.e. the rear side, of the fifth clamping member 15, which faces the third direction, so that the first driving member 21 and the second driving member 22 are separated from the plane where the clamping assembly is located, i.e. the first driving member 21 and the second driving member 22 retract towards the rear side, and are spaced apart from the clamping assembly in the third direction, and no interference is generated on the movement of the clamping assembly. Further, the clamp assembly can be retracted and reset in the downward direction.

Next, referring to fig. 6, in one embodiment, the clamp base 10 is connected to a first elastic member 31 having a predetermined allowable deformation amount in a first direction. During the leftward movement of the clamping assembly, the clamping base 10 moves leftward in synchronization with the clamping assembly, and the first elastic member 31 is elastically deformed. When the first elastic member 31 is connected to the right end 101 of the base, the first elastic member 31 is stretched. When the first elastic member 31 is connected to the left end 102 of the base, the first elastic member 31 is compressed.

After the second driving member 22 slides out of the chute 150 towards the rear side, the first driving member 21 and the second driving member 22 do not interfere with the movement of the clamping assembly, and the first elastic member 31 rebounds and drives the clamping assembly to automatically retract towards the right side through the clamping base 10.

In another embodiment, the clamping base 10 is fixed, and the clamping assembly is a first clamping member located at the first end in the uplink direction, which is the first clamping member 11 in this embodiment. A second elastic member (not shown) having a predetermined allowable deformation amount in the first direction is connected between the left side of the first clamp 11 and the base left end 102; the second elastic member is compressed during the movement of the clamping assembly to the left.

After the second driving member 22 slides out of the chute 150 towards the rear side, the first driving member 21 and the second driving member 22 do not interfere with the movement of the clamping assembly any more, and the second elastic member rebounds and drives the clamping assembly to automatically retract towards the right side for resetting.

With continued reference to fig. 6, it is further preferable that a third elastic member 33 having a prescribed deformation allowance in the third direction is connected between the driving lever 23 and the clamp base 10. When the second driving member 22 slides out toward the rear along the sliding slot 150, the third elastic member 33 is elastically deformed, for example, compressed; after the clamping assembly automatically retreats to the right and resets, the third elastic piece 33 rebounds and drives the first driving piece 21 and the second driving piece 22 to reset along the third direction through the driving rod 23.

Specifically, when the second driver 22 slides out rearward along the chute 150, the second driver 22 abuts against the rear side of the clip assembly, and the third elastic member 33 cannot rebound. The first driving member 21 and the second driving member 22 are no longer located on the XY plane of the clamping assembly. When the clamping assembly is automatically retracted to the right and reset, each clamping member is reset to the initial state, the clamping assembly does not interfere with the displacement of the second driving member 22 in the third direction, and the third elastic member 33 can drive the driving rod 23 to move forward and reset, so that the first driving member 21 and the second driving member 22 return to the XY plane where the clamping assembly is located, and a round of control cycle is restarted.

Dimensional relationship

Next, the dimensional relationships between the components will be described with reference to fig. 7 (1) and 7 (2). Fig. 7 (1) is a schematic size diagram of the driving unit 2, and fig. 7 (2) is a schematic size diagram of the first clamp 11.

Where H is a distance between the center of the first driver 21 and the center of the second driver 22 in the second direction, and L is a distance between the center of the first driver 21 and one side of the second driver 22 in the downward direction, that is, the right side edge, in the first direction.

A is a distance between the lower edge of the first up-running sliding surface 111 and the upper edge of the second up-running sliding surface 112 of the first clamping member 11 in the second direction, and B is a distance between the upper edge of the second down-running sliding surface 114 and the lower edge thereof in the first direction, which is also a distance between the upper edge of the first down-running sliding surface 113 and the lower edge thereof in the first direction. In other words, B is the spacing between the left side wall of the first clamping member 11 and the middle peak of the upper end thereof in the first direction. For convenience of explanation, only the first clamping member 11 will be described as an example, and the other clamping members are identical to the first clamping member 11 in size and structure.

In order to ensure that the first driving member 21 after the upward movement can fall onto the first upward sliding surface of the adjacent right grip member when falling back, it is necessary to make L > B. For example, when the second driving member 22 moves obliquely upward to the upper edge of the second upward sliding surface 122 of the second clamping member 12, the right edge of the second driving member 22 abuts against the left side wall of the third clamping member 13, and the distance L between the center of the first driving member 21 and the right edge of the second driving member 22 in the first direction is greater than the distance B between the peak of the upper end of the third clamping member 13 and the left side wall thereof, so that the center of the first driving member 21 can fall to one side of the third first upward sliding surface 131 of the third clamping member 13 but not to the left side of the third clamping member 13 when the first driving member 21 falls back.

Let S be the maximum stroke of the driving unit 2 in the second direction. Then, when the driving unit 2 moves up to the maximum stroke, the contact point of the second driving member 22 with the right side of the single clamping member is set as M, and when the driving unit 2 moves down to the maximum stroke, the contact point of the first driving member 21 with the right side of the single clamping member is set as N, and the distance between the M point and the N point in the second direction is set as H-S. H-S < a should be satisfied to ensure that the first and second driving members 21, 22 do not stay on the first or second ascending sliding surface when the driving unit 2 moves up or down to the maximum stroke.

Fluid pipeline system

Next, an embodiment of the control fluid line will be described with reference to fig. 8 and 9. Fig. 8 is a schematic diagram of the liquid path control principle of the conventional technology, and fig. 9 is a schematic diagram of the liquid path control principle of the present application.

Referring to fig. 8, in operation, the on-off valve 48 is opened, the states of the first three-way valve 46 and the second three-way valve 47 are adjusted so that the two ends of the pipeline 52 are respectively communicated with the pump 40 and the pipeline 53, and in the pumping state of the pump 40, the liquid in the first container 41 enters the reaction tank 43 through the pipeline 53. Then, the state of the second three-way valve 47 is adjusted so that the pipe 52 is in communication with the pipe 54, and the liquid in the second container 42 enters the reaction tank 43 through the pipe 54 in the suction state of the pump 40, and reacts with the liquid in the first container 41 previously entering the reaction tank 43.

After the reaction, the state of the first three-way valve 46 is adjusted to allow the pump 40 to communicate with the pipe 51, and the on-off valve 48 is opened, so that the pump 40 sucks the liquid in the reaction tank 43 through the pipe 51 to form a negative pressure in the relay tank 44, and the liquid in the reaction tank 44 flows into the relay tank 44. The pump 40 then blows air via line 51 creating a positive pressure in the transfer vessel 44 and blowing the liquid therein into the third vessel 45.

The control process needs a plurality of three-way valves and on-off valves to continuously switch states, the cost of each valve and an electric control system is high, the control is complex, and the reliability of the system is poor due to the fact that a plurality of control devices work together. For designs that are not under high precision requirements, there is a need for liquid path switching devices that can further reduce cost and improve reliability.

For this purpose, referring to fig. 9, with the pinch valve set of the present application, a pipe 61 is provided between the first and second pinching members 11 and 12, a pipe 62 is provided between the second and third pinching members 12 and 13, a pipe 63 and a pipe 64 are provided between the third and fourth pinching members 13 and 14, and both ends of the pipe 63 are connected to the reaction tank 43 and the relay container 44, respectively. A pipeline 65 is provided between the fourth clamp 14 and the fifth clamp 15, and a pipeline 64 and the pipeline 65 are connected in parallel, and both ends are connected to the pump 40 and the relay container 44, respectively.

In operation, first clamping member 11 and second clamping member 12 are separated, conduit 61 is in communication, and pump 40 pumps fluid in first container 41 through conduit 611 into reaction tank 43. Thereafter, the second clamping member 12 and the third clamping member 13 are separated, the pipe 62 is conducted, the second clamping member 12 and the first clamping member 11 are clamped to disconnect the pipe 61, the pump 40 sucks the liquid in the second container 42 through the pipe 62, and the liquid in the second container 42 enters the reaction tank 43 through the pipe 622 to react with the liquid previously sucked from the first container 41.

After the reaction, the third clamp 13 and the fourth clamp 14 are separated, the pipeline 63 and the pipeline 64 are conducted, and the second clamp 12 and the third clamp 13 are clamped to disconnect the pipeline 62. The pump 40 sucks the liquid in the reaction tank 43 through the pipe line 63 to form a negative pressure in the relay container 44, and the liquid in the relay container 44 is introduced through the pipe line 64. The fourth clamp 14 and the fifth clamp 15 are then separated, the line 65 is conducted, the fourth clamp 14 and the third clamp 13 are clamped, and the line 63 and the line 64 are disconnected. The pump 40 blows air via the line 65, creating a positive pressure in the relay container 44 and blowing the liquid therein into the third container 45.

As can be seen from the comparison, the pipe clamping valve group can realize the transportation of a plurality of channels and liquid according to the design sequence, has fewer control devices and relatively lower cost; the circuit control is simple, and the channel switching is realized in a mechanical mode, so that the robustness of the system is good; the flexibility of use is high, can freely increase and decrease the quantity of changing the holder and design the liquid way flow according to the demand.

In summary, the first driving member 21 and the second driving member 22 move up and down to push the specific clamping member to move in the upward direction, so that the two adjacent clamping members are separated or clamped, and the connection or disconnection of the fluid pipeline between the two clamping members is realized. The inclination angle of the connecting line between the first driving piece 21 and the second driving piece 22 relative to the second direction is adjustable, one clamping piece can be pushed by moving up and down each time when the angle is small, a plurality of clamping pieces can be spanned by moving up and down each time when the angle is large, and the clamping pieces which are already ascending can be retracted towards the descending direction by being matched with each descending sliding surface when the angle is reversely inclined, so that the flexibility and convenience of pipeline control are further improved. The automatic back-off and reset mechanism for the clamping assembly is also included, and the whole pinch valve group has the advantages of simple structure, simple and convenient control and lower cost.

It should be understood that the foregoing embodiments are only for illustrating the present application, the protection scope of the present application is not limited thereto, and any person skilled in the art, within the scope of the present application, shall be able to make modifications, substitutions and combinations according to the technical solution and the inventive concept of the present application.

Claims (10)

1. The utility model provides a clamp pipe valves, contains clamping unit, drive unit, the clamp pipe valve group is used for controlling the break-make of a plurality of fluid pipelines, its characterized in that:

the clamping unit comprises a clamping base and a clamping assembly provided with a first clamping piece, a second clamping piece and a third clamping piece; each clamping piece in the clamping assembly is sequentially arranged on the clamping base and can move along a first direction, and the two ends of each clamping piece are respectively provided with a first ascending sliding surface and a second ascending sliding surface which are obliquely arranged towards the same side;

the driving unit comprises a first driving piece and a second driving piece, the first driving piece and the second driving piece can synchronously reciprocate along a second direction crossing the first direction, and the projection of the first driving piece and the second driving piece in the first direction and the projection of the first driving piece and the projection in the second direction are respectively arranged at intervals;

the driving unit and the clamping unit are arranged along a third direction, the first driving piece and the second driving piece extend along the third direction, and the third direction is perpendicular to the first direction and the second direction; a fluid pipeline can be arranged between two adjacent clamping pieces in the clamping assembly;

In an initial state, the first driving piece is closer to the descending direction of the clamping assembly relative to the second driving piece;

when the driving unit moves towards the side of the first driving piece along the second direction, the second driving piece can relatively move along the second ascending sliding surface of the first clamping piece; and then, the driving unit moves towards the side of the second driving piece along the second direction, the first driving piece can relatively move along the first ascending sliding surface of the second clamping piece, and pushes the second clamping piece to move along the first direction towards the ascending direction, so that the second clamping piece and the first clamping piece adjacent to the ascending direction are clamped to disconnect a fluid pipeline between the second clamping piece and the third clamping piece adjacent to the descending direction, and the second clamping piece and the third clamping piece adjacent to the descending direction are separated to conduct the fluid pipeline between the second clamping piece and the third clamping piece.

2. The pinch valve set as claimed in claim 1, wherein:

when the second driving piece moves relatively along the second upward sliding surface of the first clamping piece, the first clamping piece is pushed to move upwards along the first direction, and the second clamping piece also moves along the first clamping piece in the same direction; the third clamping piece also follows the second clamping piece to move in the same direction and clamps the fluid pipeline between the second clamping piece and the third clamping piece.

3. The pinch valve set as claimed in claim 2, wherein:

the projection distance of the two ends of each clamping piece in the clamping assembly in the second direction is not larger than the projection interval of the first driving piece and the second driving piece in the second direction.

4. The pinch valve set as claimed in claim 2, wherein:

the included angle between the direction determined by the first driving piece and the second driving piece relative to the second direction is adjustable.

5. The pinch valve set of claim 4, wherein:

the two ends of at least a part of clamping pieces in the clamping assembly are also respectively provided with a first descending sliding surface and a second descending sliding surface which are obliquely arranged towards the same side;

adjusting an inclination angle of a direction determined by the first driving piece and the second driving piece relative to the second direction, so that the first driving piece is closer to the upward direction of the clamping assembly relative to the second driving piece;

when the driving unit moves to the side of the second driving member, the first driving member can slide along the first downward sliding surface of the single clamping member and push the first driving member to move in the downward direction, so that the first driving member and the clamping member adjacent in the downward direction clamp each other to disconnect the fluid pipeline between the first driving member and the second driving member, and the first driving member and the clamping member adjacent in the upward direction separate each other to conduct the fluid pipeline between the first driving member and the second driving member.

6. A pinch valve set according to any one of claims 1-5, wherein:

taking the clamping piece at the tail end in the descending direction in the clamping assembly as a last clamping piece;

the last clamping piece is further provided with a chute connected with the second ascending sliding surface of the last clamping piece, and an opening of the chute is arranged towards the third direction;

when the second driving piece moves along the second upward sliding surface of the last clamping piece towards the side of the first driving piece, the second driving piece can slide out to the side of the last clamping piece towards the third direction along the sliding groove, so that the first driving piece, the second driving piece and the clamping assembly are separated;

further, the clamp assembly can be retracted in the downward direction.

7. The pinch valve set of claim 6, wherein:

the clamping base is connected with a first elastic piece with a specified deformation allowance in the first direction;

in the process that the clamping assembly moves in the upward direction, the clamping base synchronously moves along with the clamping assembly, and the first elastic piece is elastically deformed;

after the second driving piece slides out of the sliding groove, the first elastic piece rebounds and drives the clamping assembly to retract towards the descending direction through the clamping base.

8. The pinch valve set of claim 6, wherein:

taking a clamping piece positioned at the head end in the uplink direction in the clamping assembly as a head clamping piece;

a second elastic piece with a specified deformation allowance in the first direction is connected between one side of the head clamping piece in the ascending direction and the clamping base;

the second elastic member is compressed in the process of moving the clamping assembly in the upward direction;

after the second driving piece slides out of the sliding groove, the second elastic piece rebounds and pushes the clamping assembly to retract towards the descending direction through the first clamping piece.

9. The pinch valve set of claim 6, wherein:

one side of each clamping piece in the clamping assembly in the ascending direction and/or the descending direction is provided with a groove allowing a fluid pipeline to pass through.

10. The pinch valve set of claim 6, wherein:

a driving rod is fixedly connected between the first driving piece and the second driving piece;

a third elastic piece with a specified deformation allowance in the third direction is connected between the driving rod and the clamping base;

when the second driving piece slides out to the side of the last clamping piece, which faces the third direction, along the sliding groove, the third elastic piece is elastically deformed;

After the clamping assembly retreats towards the descending direction, the third elastic piece rebounds and drives the first driving piece and the second driving piece to reset along the third direction through the driving rod.